Implants and systems for scarless mastopexy - Patent Application 20070122999

Abstract

Mastopexy implants for lifting a patient's breasts create new tissue planes within the breast that provide a more durable lift and are particularly useful for lifting breasts with a high content of fatty tissue. The implants can be implanted using blunt dissection through a stab incision, shortening the surgical time and providing an improved aesthetic appearance with minimal scarring. The implants are designed to be temporary and have sufficient strength retention to allow new tissue planes to form and support the lifted breast without significant loss of support during this regeneration period.

Description

[Technical Field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of U.S. Provisional Application No. 63 / 076,182, filed September 9, 2020, which is incorporated herein by reference in its entirety.

[0002] Technical field of the invention

[0002] The present invention relates generally to implants that can be used to lift tissues and organs in a minimally invasive manner, and more particularly to implants that can be used in plastic surgery procedures, including mastopexy, to minimize scar formation during the lifting procedure. [Background technology]

[0003] Numerous plastic surgical procedures are performed each year to restore or correct bodily form or function. Many of these procedures attempt to restore a youthful appearance or even enhance an existing appearance. Natural factors such as aging and gravity contribute to the loss of a youthful appearance. For example, skin laxity, loss of muscle tone, and weakened ligaments can lead to breast ptosis (sagging). Plastic surgeons have developed many surgical techniques to correct the ptosis of various anatomical structures that occurs with aging. These techniques differ in the type of incision, the direction of the incision, the plane of dissection, the amount of dissection, the extent of tissue repositioning, the use of various types of sutures, various suturing techniques, and various fixation techniques.

[0004] Plastic surgeons have developed a number of different mastopexy procedures for breast lift. However, these procedures can be very invasive, require extensive dissection, and can leave patients with visible scarring. For example, the lollipop or vertical mastopexy procedure is performed by making an incision around the areola and a vertical incision in the lower pole of the breast from the areola to the inframammary fold (IMF). The anchor or Wise procedure is a more invasive procedure than the lollipop procedure in that, in addition to the vertical incision used in the lollipop procedure, an incision is made across the inframammary fold. Both the lollipop and anchor procedures can leave permanent scarring in the lower pole of the patient's breast, which can result in poor cosmetic outcomes.

[0005] Minimally invasive suture-based mastopexy procedures have been developed that help minimize scarring. These include the Benelli mastopexy, in which a donut-shaped piece of breast skin is excised from around the areola, with an inner incision following the areola periphery and an outer incision circumscribing the areola further outward. While this approach minimizes scarring, it can result in severe areola stretching or tissue necrosis because all of the newly lifted parenchymal weight of the breast is supported by the sutures surrounding the areola and used to approximate the breast skin back around the areola.

[0006]

[0006] Some surgeons have attempted to use surgical mesh to reinforce lifting procedures in open mastopexy and breast reconstruction procedures. Some of these techniques also incorporate the use of various reinforcement materials similar to those used in hernia repair, such as flat polymer mesh, allografts, xenografts, and autografts. However, wrapping the material around the parenchyma without the use of anchoring elements to transfer the load from the skin at the lower pole can leave the breast exposed to the same ptosis forces that existed before breast surgery.

[0007] In 1981, Johnson described the use of MARLEX® (polypropylene) mesh to convert breast tissue support from a dermal to a skeletal origin after mastopexy by attaching the mesh to the region of the second rib (Johnson, Aesth. Plast. Surg. 5:77-84 (1981)). The flat MARLEX mesh is a permanent mesh made from polypropylene that is implanted to provide two slings of breast tissue support for each breast. This procedure is based on the Wise open breast lift.

[0008]

[0008] Auclair and Mitz described mesh-assisted mastopexy using a flat absorbable mesh and a periareolar skin excision technique (Auclair and Mitz, Ann. Chir. Plast. Esthet. 38:107-113 (1993)). Rapidly absorbable VICRYL® mesh was placed around the anterior surface of the mammary gland to form an internal bulla. This procedure requires open breast surgery and involves extensive excision.

[0009]

[0009] Goes reported the use of polyglactin 910 (an absorbable copolymer of 90% glycolide and 10% L-lactide, also known as VICRYL) and a mixed mesh (containing 60% polyglactin 910 and 40% permanent polyester) in rim areolar mammaplasty using a double-skin technique (Goes, Plast. Reconstr. Surg. 97:959-968 (1996)). This open surgical technique involves peeling the soft tissue envelope from the parenchyma and encasing the breast parenchyma with mesh to help induce active connective scar formation and create a breast lining structure that is less prone to sagging.

[0010]

[0010] U.S. Patent No. 6,210,439 to Firmin et al. discloses a circular VICRYL mesh with V-shaped openings extending from the center and a metal reinforcing wire around the periphery. The implant is designed to be inserted in an invasive open surgical procedure, and when the reinforcing wire is tightened, it assumes a conical shape suitable for mammoplasty.

[0011]

[0011] U.S. Patent No. 7,476,249 to Frank discloses an implantable sling-shaped prosthetic device for supporting and positioning a breast implant in a patient, the device being constructed from a sheet of permanent, chemically inert material such as polytetrafluoroethylene or silicone to support the breast implant. The sling-shaped device is designed to be placed in an invasive open surgical procedure.

[0012]

[0012] U.S. Patent Application Publication No. 2009 / 0082864 to Chen et al. also discloses a prosthetic device for supporting breast implants made from mesh. The device has a flat posterior wall, a concave anterior wall, and a curved transition area between the walls that forms a smoothly curved bottom periphery. Insertion of the device requires an open surgical procedure with significant dissection.

[0013]

[0013] U.S. Patent Application Publication No. 2008 / 0097601 by Codori-Hurff et al. discloses mastopexy and breast reconstruction procedures assisted by the use of processed tissue material derived from bowel or dermis, which is cut into a crescent shape to form a mastopexy implant and implanted using an invasive open surgical procedure.

[0014]

[0014] US Patent Application No. 20160038269 to Altman discloses various silk fabric implants that can be implanted using open surgery to support the underside of the breast.

[0015]

[0015] U.S. Patent Application No. 20120185041 to Mortarino et al. discloses a woven silk mesh that can be used to provide support to the lower pole of the breast.

[0016]

[0016] Mortarino, U.S. Patent Application No. 20130304098, discloses a silk implant in the form of a pocket that can be used for breast reconstruction.

[0017]

[0017] WO 2009 / 001293 to Lauryssen discloses a polypropylene and polyester mesh implant formed into a cup shape that can be used in a mastopexy procedure. The mesh is implanted in an open surgical procedure and completely surrounds the breast tissue.

[0018]

[0018] Hamilton's International Publication No. 2004 / 096098 discloses a breast-shaped permanent implant for soft tissue support made from polytetrafluoroethylene (ePTFE), which can be used to create a predetermined breast shape.

[0019]

[0019] WO 2006 / 117622 to Lauryssen et al. discloses a permanent implant for soft tissue support of the breast that is generally L- or U-shaped and wrapped around the breast to provide support.

[0020]

[0020] Van Deventer et al. (Aesth. Plast. Surg. 36:578-89(2012)) disclose the use of an internal breast support system for mastopexy using a partially degradable mesh formed into a cone (van Deventer et al., Aesth. Plast. Surg. 36:578-89(2012)). This mesh is implanted in an open surgical procedure and completely surrounds the upper and lower poles of the breast.

[0021]

[0021] US Patent No. 9,532,867 to Felix discloses a resorbable implant for breast surgery that conforms to the breast parenchyma and can support the newly lifted breast parenchyma.

[0022]

[0022] U.S. Patent Application Publication No. 20100023029 to Young discloses a sheet made from VICRYL for use in breast reconstruction, the sheet having several attachment areas for attaching the sheet to a patient's anatomy. The device can be used to partially cover and constrain a tissue expander or implant.

[0023]

[0023] WO 2007004214 to Popov discloses a cage-shaped device for supporting the lower pole of the breast, which is designed to be implanted using open surgery.

[0024]

[0024] Several devices have been described for performing open mastopexy by mimicking the breast's own fascial support system, the perimammary ligaments.

[0025]

[0025] U.S. Patent Application No. 2017 / 0224471 to Rehnke discloses a circular tubular member with a drawstring that can be used to lift the breast when the perimammary ligaments are stretched or weakened. The device is inserted in an open surgical procedure to tighten the perimammary ligaments. The device is placed behind the mammary gland above the pectoral muscle, anchored to the perimammary ligaments, and tightened to a smaller diameter using the drawstring. The tightening reduces the footprint of the base of the breast, gathering the breast into a higher, more prominent position on the patient's chest.

[0026]

[0026] U.S. Patent Application No. 2017 / 0231753 to Lee discloses a material for providing circumferential coverage of breast tissue that is placed in the pectoral muscle under the breast using an incision, stretching and securing the material above the breast, and attaching the material to the pectoral muscle tissue inside and outside the breast to lift the breast tissue.

[0027]

[0027] Several devices have been described for performing mastopexy procedures in a minimally invasive manner using a sling.

[0028]

[0028] U.S. Patent Application No. 2008 / 0027273 to Gutterman discloses a minimally invasive mastopexy system with a soft tissue support sling. The device is designed to provide support by suspending the breast from the upper pole region using a sling.

[0029]

[0029] U.S. Patent Application Publication No. 2012 / 0283826 to Moses et al. discloses a minimally invasive mastopexy system having an insertion device, a suspension strut, and a lower pole support that is inserted under the lower pole of the breast as a sling to suspend the breast.

[0030]

[0030] U.S. Patent Application No. 20100217388 to Cohen discloses a cradle member for soft tissue reshaping of the breast. The cradle member acts as a sling and is implanted to suspend the lower pole of the breast.

[0031]

[0031] U.S. Patent No. 7,670,372 to Shfaram et al. discloses a minimally invasive breast lift system that incorporates one or more suspension members and a cradle member placed under the inferior pole of the breast. The cradle member is connected to the suspension member, often a suture, and acts as a sling to lift the breast.

[0032] U.S. Patent Application Publication No. 2010 / 0331612 to Lashinski et al., U.S. Patent Application Publication No. 2008 / 0082113 to Bishop et al., and U.S. Patent Application Publication No. 2009 / 0248071 to Saint et al. disclose devices for performing minimally invasive mastopexy procedures that include a sling and soft tissue anchors introduced superiorly to support the breast. U.S. Patent Application Publication No. 2012 / 0053689 to Martin et al. discloses PHA fibers for use in these devices.

[0033] Despite the advances noted above, most mastopexy procedures require open surgical procedures with long surgical incisions, which leave noticeable and permanent scars on the breast, especially in the immediate post-procedure period. These scars can leave patients dissatisfied with the aesthetic outcome of the procedure and disappointed that the procedure did not meet their expectations. Additionally, the procedures described generally involve extensive dissection of tissue planes at the lower pole of the breast and insertion of a sling or other construct to elevate or reshape the lower pole. The extensive dissection in these existing procedures typically requires the use of general anesthesia.

[0034]

[0034] Objects and advantages of embodiments of the present invention address the above-mentioned drawbacks. For example, an object and advantage of embodiments of the present invention is to provide an implant and system for mastopexy that can be used to provide a defined, aesthetically pleasing outcome without open surgery, large incisions, and extensive tissue dissection and manipulation, while minimizing the formation of permanent scars in the breast. Another object and advantage of the present invention is to provide an implant and system for mastopexy that can be used to avoid the use of scarring surgical incisions, tissue plane dissection, excess skin removal, and the use of sutures to close the incisions. Another object and advantage of the present invention is to provide a mastopexy implant that can be implanted through a small stab incision. Such a procedure may reduce operative time and the need for general anesthesia. The latter not only eliminates the potential risks associated with general anesthesia, but would also provide a more attractive and easier mastopexy procedure, especially for some younger patients who may prefer to delay more invasive procedures such as those described above. Another object and advantage of the present invention is to provide an implant and system for minimally invasive mastopexy that can be used in patients with fatty breasts or less dense breast tissue, where lifting the breast tissue is more difficult due to the higher content of fatty tissue present in the breast. Summary of the Invention

[0035]

[0035] The implants and systems described herein assist surgeons in reshaping, repositioning, or lifting the breast to provide an aesthetically pleasing shape.

[0036] In embodiments, mastopexy implants and systems are designed to minimize scar formation. The implants can be implanted into a patient's breast through a small opening using blunt dissection. The mastopexy implants and systems avoid the use of traditional surgical approaches such as crescent mastopexy, donut (or Benelli) mastopexy, lollipop (or vertical) mastopexy, and anchor (or Weiss or Wise) mastopexy, all of which require extensive surgical incisions, typically in conjunction with the removal of patient tissue, to insert the mastopexy implant into the breast.

[0037] In embodiments, implants and systems for mastopexy are designed to create one or more new tissue planes within the breast. In embodiments, the implant includes a suspension member with anchoring members that create tissue planes within the breast after implantation. The anchoring members are designed to encourage tissue ingrowth to create the tissue planes. The tissue planes distribute the load of the lifted breast over a larger area than can be achieved by simply lifting the breast using sutures or barbed sutures. The anchoring members of the suspension member are attached to a support wire at only one end of the anchoring member. The support wire is not attached to both ends of the anchoring member. The anchoring members preferably include retainers for engaging breast tissue. After implantation within the breast, a force can be applied to the support wire to engage the anchoring members with breast tissue and lift the breast. The large surface area of ​​the anchoring members provides multiple points for attachment of the anchoring members to breast tissue to facilitate breast lifting. The multiple attachment points created by the anchoring member are particularly useful for lifting a patient's breast when the breast contains fatty or low-density breast tissue and when sutures cannot be firmly held in fatty breast tissue. The multiple points for attachment of the anchoring member to the breast tissue allow the load of the lifted tissue to be distributed and not localized. The tissue planes formed within the breast after implantation of the anchoring member help distribute the load of the breast over a wide area, thereby helping to maintain breast lift and prevent subsequent ptosis. In embodiments, the implants and systems create one or more areas of new tissue within the breast after implantation to maintain breast lift. Notably, the anchoring member is not a sling and does not include support wires attached to both ends of the anchoring member. The anchoring member is not designed to lift the breast by placing a sling on the lower pole of the breast with support members placed on the medial and lateral sides of the breast that can be pulled superiorly to lift the breast.Alternatively, the anchoring member of the suspension member implant is designed to lift tissue by implanting the anchoring member on one side of the breast and pulling on an attached support wire to lift the anchoring member superiorly on the side of the breast where it is implanted. Preferably, a second anchoring member may be implanted on the opposite side of the breast from the first anchoring member to lift tissue on both sides of the breast.

[0038] In embodiments, the implant retains its strength long enough to allow breast support to transition from the implant to new tissue without any loss of support to the lifted breast tissue. In embodiments, the anchoring member of the suspension member retains at least 15% of its initial strength, preferably at least 30% of its initial strength, and more preferably at least 50% of its initial strength, for 12 weeks after implantation in the breast. In embodiments, the support wire attached to the anchoring member of the implant retains at least 15% of its initial strength, preferably at least 30% of its initial strength, and more preferably at least 50% of its initial strength, for 12 weeks after implantation in the breast. In embodiments, the implant functions as a temporary scaffold to lift and provide initial support to the breast, but degrades over time and is replaced by host tissue.

[0039] In embodiments, the implant is implanted with minimal surgical intervention. In embodiments, the implant is implanted into the breast using a stab incision and blunt dissection. In embodiments, the implant is designed to be implanted without the use of general anesthesia.

[0040]

[0040] In an embodiment, the implant comprises a suspension member comprising a support wire having a first end and a second end and an anchoring member having a first end and a second end, the support wire being connected at its second end to the first end of the anchoring member. In an embodiment, the anchoring member of the implant is porous. In an embodiment, the anchoring member of the implant comprises a fabric. In an embodiment, the anchoring member of the implant comprises a mesh, a knitted mesh, or a woven mesh. In an embodiment, the anchoring member of the implant comprises a monofilament. In an embodiment, the anchoring member of the implant comprises an oriented monofilament. In an embodiment, the anchoring member of the implant is configured with a retainer. The retainer is designed to engage and lift breast tissue. In an embodiment, the retainer of the anchoring member of the implant is selected from one or more of anchors, swivel anchors, hooks, darts, barbs, hooks, projections, extensions, bulges, ridges, spurs, bumps, points, cogs, surface roughness, surface irregularities, tines, and arrows. In an embodiment, the retainer extends 0.1 to 25 mm, more preferably 1 to 15 mm, and even more preferably 3 to 10 mm, from the plane of the anchoring member. In an embodiment, the retainer is angled relative to the anchoring member. In an embodiment, the angle formed by (i) the first end of the anchoring member and the apex of that angle and (ii) the tip of the retainer and the apex of that angle is less than 90 degrees. In an embodiment, the tip of the implanted retainer points in a superior direction. In an embodiment, the second end of the anchoring member is connected to an introducer housing tip designed to engage with an introducer tool. In an embodiment, the introducer housing tip has a conical shape. In embodiments, an introducer tool may be inserted into the introducer housing tip of the anchoring member of the suspension member, and the introducer tool may be used to implant the suspension member into the breast. In embodiments, the introducer housing tip has a blunt drive tip.In embodiments, an introducer tool may be inserted into the introducer housing tip of the anchoring member of the suspension member, and the blunt drive tip of the introducer housing tip may be used to create a channel in the patient's breast by blunt dissection and implant the suspension member. In embodiments, the support wire of the suspension member is elongated. In embodiments, the support wire has a length extending along an arc from the first end to the second end of the support wire. In embodiments, the support wire of the suspension member of the implant comprises fiber, monofilament fiber, or braided fiber. In embodiments, the fiber, monofilament fiber, or braided fiber is formed from an oriented polymer. In embodiments, the support wire of the suspension member comprises or is configured to provide a fixation element. The fixation element is designed to secure the support wire to surrounding soft tissue. In embodiments, the fixation element of the support wire is selected from one or more of a fiber strand, a loop, a chain braid, and a braided tape. In embodiments, the suspension or anchoring member is partially or completely covered by or inserted into a removable sheath. In embodiments, the removable sheath is made of nylon. In embodiments, the implant further comprises a strut. Preferably, the strut has a first arm having a first end and a second end, a second arm having a first end and a second end, and a central element having a first end and a second end, wherein the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element. In embodiments, the element is a plate or fabric. Preferably, the plate or fabric is porous. Preferably, the plate or fabric comprises tines or other self-gripping features. Preferably, the tines or self-gripping features protrude from the plane of the plate or fabric and are designed to engage tissue after implantation. In embodiments, the tines or self-gripping features are located on at least one surface of the plate or fabric. In an embodiment, the strut further comprises one or more needles, more preferably one or more needles having blunt ends.In an embodiment, the strut has a first arm having a first end and a second end, a second arm having a first end and a second end, and a central element having a first end and a second end, wherein the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element, and the strut further comprises a needle attached to the first end of the first arm of the strut and optionally a second needle attached to the first end of the second arm of the strut.

[0041] In an embodiment, the anchoring member comprises fibres having an average diameter between 0.02 mm and 0.7 mm, more preferably between 0.05 mm and 0.25 mm, even more preferably between 0.07 mm and 0.175 mm.

[0042] In embodiments, the implant comprises one or more absorbable polymers. In embodiments, the implant is absorbable. In embodiments, the support wire of the implant is absorbable. In embodiments, the anchoring member of the implant is absorbable. In embodiments, the introducer housing tip is absorbable.

[0043] In embodiments, the suspension member of the implant is capable of withstanding a load of at least 5 N, at least 10 N, or at least 60 N. In embodiments, the suspension member of the implant is capable of withstanding a load of less than 500 N.

[0044] In embodiments, the anchoring members of the implant are capable of withstanding a burst force of at least 1 N, or at least 10 N. In embodiments, the anchoring members are capable of withstanding a burst force of less than 1,000 N.

[0045] In an embodiment, the anchoring member of the implant comprises a mesh or fabric, the mesh or fabric having the following properties: (i) a suture pull-out strength of at least 1 Kgf; (ii) a burst strength of 0.1 to 100 Kg; (iii) a thickness of 0.05 mm or greater; and (iv) a thickness of 5 to 800 g / m 2 and (v) a pore diameter of 5 μm to 10 mm. In a preferred embodiment, the anchoring member of the implant comprises a mesh or woven fabric having one or more of the following properties: (i) a suture pull-out strength of 1 kgf to 20 kgf, (ii) a burst strength of 1 to 50 kg or 10 to 50 kg, (iii) a thickness of 0.1 to 1 mm, and (iv) a pore diameter of 100 to 300 g / m 2 and (v) a pore diameter of 100 μm to 1 mm.

[0046] In an embodiment, the support wire has a tensile strength of at least 1 MPa, more preferably 10 MPa, and even more preferably 100 MPa, but less than 20 GPa.

[0047]

[0047] In an embodiment, the suspension member comprises a tensioner, which can be used to adjust the tension of the suspension member and thereby the degree of breast lift.

[0048] In an embodiment, the implant for mastopexy is designed to be inserted through one or more entry points in the upper pole of the breast. In an embodiment, the implant for mastopexy is designed to be inserted through one or more entry points in the lower pole of the breast. In an embodiment, the implant is inserted through one or more entry points having a width or diameter of 0.1 to 20 mm, more preferably 5 to 10 mm. In an embodiment, the entry points are made by stab incisions.

[0049] In embodiments, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, or more implants are implanted within the breast to lift the breast.

[0050] In an embodiment, the implant comprises poly-4-hydroxybutyrate (P4HB) or a copolymer thereof. In an embodiment, the implant comprises poly(butylene succinate) or a copolymer thereof. In an embodiment, the implant comprises polydioxanone. In an embodiment, the implant comprises P4HB or a copolymer thereof, PBS or a copolymer thereof, or polydioxanone in the form of a mesh or fabric, preferably a monofilament mesh or monofilament fabric made from monofilaments.

[0051] In embodiments, a mastopexy system is provided. In embodiments, the disclosed mastopexy system comprises one or more of the implants disclosed herein and one or more tools. In embodiments, the mastopexy system comprises: (i) one or more implants comprising a suspension member comprising a support wire having a first end and a second end and an anchoring member having a first end and a second end, the support wire being connected at its second end to the first end of the anchoring member; and (ii) one or more tools selected from the group consisting of a stab dissection tool, a blunt dissection tool, and an introducer tool. In embodiments, the blunt dissection tool comprises a straight needle. In embodiments, the blunt dissection tool comprises a curved needle. In embodiments, the stab dissection tool is used to make a stab incision in the breast. In embodiments, the blunt dissection tool is used to create a defined channel through the breast for the anchoring member. The channel through the breast is preferably created from a stab incision in the breast. The channel created in the breast by the blunt dissection tool is sized to allow for the insertion of a mastopexy implant comprising a suspension member. In embodiments, the channel in the breast is created by a tool having a diameter of 1 mm to 15 mm, more preferably 2 to 5 mm. In embodiments, the defined channel created by blunt dissection for the suspension member is curved. The curved channel aids in engaging the implant with breast tissue. In embodiments, an introducer tool is loaded with an implant comprising a suspension member. In embodiments, the introducer tool is used to insert the implant comprising a suspension member into the breast. In embodiments, the introducer tool is used to insert the implant comprising a suspension member into the channel created in the breast by the blunt dissection tool. In embodiments, the second end of the anchoring member of the suspension member comprises an introducer housing tip for attaching the distal end of the introducer tool.An introducer tool can be inserted into the introducer housing tip and used to insert a suspension member into the channel in the breast created by the blunt dissection tool. More preferably, the introducer housing tip has a conical shape with a blunt drive tip and can be used to form a channel in the breast without the use of a separate blunt dissection tool. In this embodiment, the introducer tool is inserted into the introducer housing tip attached to the end of the suspension member, and the introducer tool is used to insert the introducer housing tip into a stab incision in the breast. A defined channel in the breast is then created by pushing the introducer housing tip with the blunt drive tip through the breast tissue with sufficient penetration force to penetrate the breast tissue, and the suspension member attached to the introducer housing tip is delivered to the implant site. In an embodiment, the implant with the suspension member is used to lift the breast after insertion of the implant into the breast.

[0052] In embodiments, the implant is sized to be inserted into the breast through a stab incision. In embodiments, the stab incision is 0.3 to 3 cm, more preferably 0.5 to 1.5 cm. In embodiments, the implant is sized to be inserted into the breast through a channel formed by blunt dissection, optionally formed by a blunt dissection tool.

[0053] In an embodiment, there is provided a mammopexy system for fixing a patient's breast at a target position, the mammopexy system comprising a first hanging member comprising a first support wire having a first end and a second end, and a first anchoring member having a first end and a second end, the first support wire being connected at its second end to the first end of the first anchoring member; a second support wire having a first end and a second end, and a second anchoring member having a first end and a second end. and a second suspension member comprising a second support wire connected at its second end to the first end of the second anchoring member, wherein one suspension member is located on the outside of the breast when implanted within the breast and the second suspension member is located on the inside of the breast when implanted within the breast, such that the support wire of each suspension member is located superior to the anchoring member within the breast and the first end of the support wire is located above the nipple-areola complex (NAC). The mastopexy system may further comprise one or more of a puncture dissection tool, a blunt dissection tool, and an introducer tool. The mastopexy system may further comprise an introducer housing tip for the introducer tool located at the second end of the anchoring member. The introducer tool may be inserted into the introducer housing tip and used to insert the suspension member into a defined channel within the breast created, for example, by one or more blunt dissection tools. Alternatively, creation of a defined channel in the breast and insertion of the suspension member may be performed by an introducer housing tip designed for blunt dissection, for example, an introducer housing tip with a conical shape and a blunt driving tip. In this embodiment, the mastopexy system includes an introducer tool inserted into the introducer housing tip connected to the end of the suspension member, and the system is used by inserting the introducer housing tip into the breast, preferably through a stab incision, and driving the introducer housing tip through breast tissue with its blunt driving tip to create a defined channel in the breast.A suspension member attached to the tip of the introducer housing is simultaneously implanted within the defined channel. The mastopexy system may further include a strut that can be implanted superior to the NAC of the breast and connected to a first end of a support wire. Tensioning the support wire and attaching the support wire to the strut can be used to lift the breast. In embodiments, the strut includes a first arm having a first end and a second end, a second arm having a first end and a second end, and a central element having a first end and a second end, wherein the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element. In embodiments, the element is a fabric or a plate. Preferably, such a configured strut may be implanted in the breast at a location superior to the NAC, and the breast may be suspended by connecting a first arm of the strut to a first end of a support wire of a first implanted suspension member and a second arm of the strut to a second end of a support wire of a second implanted suspension member. In embodiments, the struts of the mastopexy system are inserted into a channel superior to the NAC, preferably formed by blunt dissection. In embodiments, the struts of the mastopexy system comprise one or more needles, preferably one or more needles with blunt tips, that can be used to form a channel superior to the NAC for insertion of the struts. Preferably, the channel and the location of the implanted struts are along the medial-lateral plane of the breast superior to the NAC. In embodiments, the plate components of the struts comprise holes and / or tines. The tines protrude from the plane of the plate and are designed to engage tissue to secure the strut in place. The holes are designed to allow tissue in-growth into the plate to secure the struts in place. In embodiments, the plate is molded. In embodiments, the arms of the struts are formed from monofilament, multifilament, or braided fibers. In embodiments, the fibers are crimped at one end to a needle, preferably a blunt needle.

[0054]

[0054] In an embodiment, the method includes the steps of: (i) introducing a first suspending member comprising a first support wire having a first end and a second end and a first anchoring member having a first end and a second end, the first support wire being connected at its second end to the first end of the first anchoring member on the outside or inside of the breast; and (ii) introducing a second suspending member comprising a second support wire having a first end and a second end and a second anchoring member having a first end and a second end, the second support wire being connected to the first end of the breast. A method for suspending a patient's breast is provided, comprising: (i) connecting a first end of the first support wire to a first end of a second anchoring member at a second end thereof opposite the suspension member; and (ii) connecting the first end of the first support wire to the first end of the second support wire at a location superior to the NAC of the breast, or anchoring the first end of the first support wire and the first end of the second support wire to postural tissue at a location superior to the NAC of the breast, or inserting a strut superior to the NAC of the breast and connecting the first end of the support wire of the suspension member to the strut. In an embodiment, the method comprises inserting a suspension member comprising an anchoring member having an introducer housing tip at its second end. An introducer tool may be inserted into the introducer housing tip and used to insert the suspension member into a defined channel in the breast created by a blunt dissection tool. In other embodiments, the introducer housing tip has a shape designed for blunt dissection and may be used with an introducer tool to create a defined channel in the breast by blunt dissection and deliver a suspension member to the breast. In embodiments, the introducer housing tip has a conical shape and a blunt driving tip so that it may be used to create a channel in the breast for the suspension member. In embodiments, the defined channel in the breast for the suspension member is created by forcing the introducer housing tip into the breast with sufficient force to penetrate the breast tissue. In embodiments, a method of lifting a breast includes securing a support wire to postural tissue, the postural tissue being muscle, pectoral muscle, intercostal tissue, fascia, bone, ribs, clavicle, ligaments, tendons, and skin.In an embodiment, the method further comprises inserting a strut comprising a first arm having a first and second end, a second arm having a first and second end, and a central element having a first and second end, wherein the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element. In an embodiment, the first end of one of the strut arms is attached to a needle, which is used to form a channel in the breast for strut insertion, or the first ends of both arms are attached to needles, which are used to form a channel in the breast for strut insertion. In an embodiment, the strut element is a fabric or a plate. In an embodiment, the method of lifting a breast comprises applying tension to a first end of a first support wire to connect it to the first arm of the strut and applying tension to a first end of a second support wire to connect it to the second arm of the strut. In embodiments, the method further comprises using an anchoring member with a retainer, engaging the retainer with breast tissue, and applying a force to the retainer to lift the breast. Preferably, the retainer has an angled tip to engage breast tissue as the anchoring member is moved in an inferior-to-superior direction. In embodiments, the angle between (i) the first end of the anchoring member and the apex of its angle and (ii) the tip of the retainer and the apex of its angle is less than 90 degrees. In embodiments, the method comprises using a support wire comprising or configured with a fixation element, the fixation element engaged with breast tissue to anchor the support wire in place.

[0055]

[0055] In an embodiment, the method includes the steps of: (i) introducing, on the outside or inside of the breast, a first hanging member comprising a first support wire having a first end and a second end and a first anchoring member having a first end and a second end, wherein the first support wire is connected at its second end to the first end of the first anchoring member; and (ii) introducing, on the opposite side of the breast from the first hanging member, a second hanging member comprising a second support wire having a first end and a second end and a second anchoring member having a first end and a second end. a second support wire connected at a second end thereof to a first end of a second anchoring member; and (iii) connecting the first end of the first support wire to the first end of the second support wire at a position superior to the NAC of the breast, or anchoring the first end of the first support wire and the first end of the second support wire to postural tissue at a position superior to the NAC of the breast, or inserting a strut at a position superior to the NAC of the breast and connecting the first end of the support wire of the suspension member to the strut, The method further includes the steps of: (i) making one or more puncture incisions in the breast; (ii) creating straight or curved channels inside and outside the breast by blunt dissection for insertion of a suspension member; (iii) inserting the suspension member into an introducer tool and deploying the suspension member from the introducer tool into the breast; (iv) inserting the introducer tool into an introducer housing tip connected to the second end of the anchoring member of the suspension member and deploying the suspension member into the breast using the introducer tool; and (v) inserting the suspension member into the breast. (vi) inserting an introducer tool into an introducer housing tip connected to the second end of the anchoring member of the suspending member, and using the introducer housing tip to form a defined channel in the breast and implant the suspending member into the breast; (vi) inserting the suspending member into the breast, where the suspending member is partially or completely covered by or inserted into a sheath, and removing the sheath after insertion of the suspending member, optionally removing the sheath in an inferior to superior direction, preferably removing the sheath through the upper pole of the breast;(vii) optionally, after the patient is seated in an upright position, applying tension to one or more of the suspension members in an inferior-to-superior direction to suspend the breast; (viii) optionally, attaching one or more needles to the struts, creating a channel superior to the NAC of the breast by blunt dissection for insertion of the struts by using the one or more needles attached to the struts to create a channel, and removing the one or more needles from the struts; and (ix) connecting the support wires together and then trimming the support wires.

[0056]

[0056] In an embodiment, there is provided a puncture incision tool, an introducer tool and a mastopexy implant, wherein the mastopexy implant comprises a hanging member comprising a support wire having a first end and a second end and an anchoring member having a first end and a second end, the support wire being connected at its second end to the first end of the anchoring member, and the anchoring member being connected at its second end to a tip of the introducer housing; making a puncture incision in the breast; and inserting the distal tip of the introducer tool into the tip of the introducer housing. and placing an introducer housing tip within the stab incision; forcing the introducer tool through the breast tissue with sufficient penetration force to penetrate the breast tissue such that the implanted support wire is superior to the anchoring member, thereby creating a defined channel within the breast and delivering a suspension member; removing the introducer tool from the breast; applying tension to the support wire in an inferior-to-superior direction to lift the breast; and securing the support wire at a position superior to the NAC of the breast. In embodiments, the method comprises using a porous anchoring member comprising a retainer, and optionally the anchoring member is a fabric or mesh. In embodiments, the method of lifting the breast comprises making a stab incision superior to the NAC of the breast and forming a defined channel within the breast starting at a position superior to the NAC of the breast, or the stab incision is made inferior to the patient's NAC and the defined channel is created starting at a position inferior to the NAC of the breast. In an embodiment, the method further comprises creating a defined channel above the NAC of the breast, inserting a strut into the channel, tensioning a support wire, and attaching the tensioned support wire to the strut.

[0057]

[0057] In an embodiment, the implant comprises a suspension member, the suspension member comprising a support wire connected to an anchoring member, the anchoring member being suspended from the support wire within the breast.

[0058]

[0058] In an embodiment, there is provided a method of minimally invasive mastopexy comprising providing a first suspension member and a second suspension member each comprising a support wire having a first end and a second end, and an anchoring member having a first end and a second end, wherein the support wire is connected at its second end to the first end of the anchoring member, and the anchoring member is connected at only one end to the support wire; advancing the first suspension member into the breast by blunt dissection to a first location within the breast; advancing the second suspension member into the breast by blunt dissection to a second location within the breast; lifting the breast by pulling the suspension members in an inferior to superior direction; connecting the support wire of the first suspension member to the support wire of the second suspension member, or anchoring the support wire of the suspension member to tissue, or advancing a strut into the breast superior to the NAC of the breast and connecting the support wire of the suspension member to the strut. In embodiments, the first and second locations in the breast are superior to the NAC. In embodiments, a support wire of the suspension member is inserted into a location superior to the NAC and used to retract breast tissue from an inferior location in the breast to a superior location in the breast. In embodiments, the first and second locations in the breast are inferior to the NAC. In embodiments, a support wire of the suspension member is inserted into a location inferior to the NAC and used to retract breast tissue from an inferior location in the breast to a superior location in the breast.

[0059] In embodiments, the suspension member is advanced into the breast partially or completely within the sheath. In embodiments, the suspension member within the sheath is advanced into the breast and then engaged with tissue by removing the sheath. In embodiments, the sheath is removed through the upper pole of the breast. In embodiments, the suspension member is advanced into the breast using an introducer tool inserted into an introducer housing tip connected to the second end of the anchoring member of the suspension member. In embodiments, the introducer housing tip is used to create a defined channel in the breast by blunt dissection.

[0060] In embodiments, the strut is advanced into the breast by connecting one or more needles to the strut, and the one or more needles are removed after implantation of the strut.

[0061] In embodiments, the implant is folded or rolled into a three-dimensional shape for delivery into the breast. In embodiments, the implant has a three-dimensional shape and is inserted into an introducer tool for delivery into the breast. In embodiments, the implant has shape memory. The shape memory allows the implant to expand into a desired shape after delivery to the implantation site.

[0062] In embodiments, the implant may be implanted without removing tissue from the patient. The implant may be implanted without removing skin from the patient.

[0063] In embodiments, the implant is implanted using blunt dissection by inserting a blunt dissection tool into the breast and pushing the tool through the breast tissue with sufficient penetration force to penetrate the tissue and form a channel in the breast for the implant. In embodiments, the blunt dissection tool is formed by connecting an introducer tool to the introducer housing tip.

[0064]

[0064] In embodiments, the implant serves to provide the surgeon with a means for delivering cells, stem cells, gels, hydrogels, bioactive agents, drugs, biological agents, adipose tissue, autologous fat, fat lipoaspirate, adipocytes, fibroblasts, and other materials to the implant site.

[0065] In an embodiment, the implant has an endotoxin content of less than 20 endotoxin units. In an embodiment, the implant is sterilized. The implant is preferably sterilized by ethylene oxide, cold ethylene oxide, electron beam irradiation, or gamma irradiation.

[0066] It should be noted that the implants and methods described herein differ significantly from other implants and methods previously disclosed for mastopexy and breast reconstruction. First, the implants are implanted using a stab incision and blunt dissection to form a defined channel within the breast, instead of a long surgical incision. This approach reduces scarring in the breast. Second, the implants are sized to be inserted through a stab incision rather than using a longer or open surgical incision for implantation. Third, the procedure can be performed without the use of general anesthesia. Fourth, the implants are not slings used as hammocks to suspend the lower pole of the breast. Implantation of the implant does not require extensive dissection of the tissue plane at the lower pole of the breast for insertion of the sling.

[0067]

[0067] These and other objects and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings. [Brief explanation of the drawings]

[0068] [Figure 1]

[0068] Figure 1 shows a patient's breast contour 1 and NAC 2, and implants for lifting the breast, namely, first suspension member 3, second suspension member 4, and strut 5. After implantation and tensioning, suspension members 3 and 4 are connected to strut 5 at connection point 6. [Figure 2]

[0069] 1 shows an example of a system for mastopexy, comprising a first suspension member 10, a second suspension member 11, a strut 12, and two introducer tools 13 with straight needles. [Figure 3]

[0070] A diagram of a hanging member 20 showing a support line 21 having a first end 22 and a second end 23, and a mooring member 24 having a first end 25 and a second end 26, where the second end of the support line is connected to the first end of the mooring member. [Figure 4]

[0071] 1 is a diagram of a hanging member 30 in which a support wire 31 is connected to a tether member having a ladder-like structure 32. The tether member is formed from three retainers 33 inserted into the ladder-like structure 32. Detail A shows an enlargement of area A of the support wire 31, showing a fastening element 34 formed with a two-loop chain braid configuration. [Figure 5]

[0072] 1 is a diagram of a suspension member 40 showing a support wire 41 having a first end 42 and a second end 43, and an anchoring member 44 having a first end 45, a second end 46, three retainers 47, and an introducer housing tip 48 connected to the anchoring member second end 46. Detail A is an enlargement of area A showing the retainer 50, the anchoring member ladder structure 51, the retainer base 52, the retainer tip 53, and the retainer secured to the crisscrossing ladder structure 54. Detail B is an enlargement of area B showing the introducer tool insertion location 60 at the introducer housing tip 61 and the cone-shaped tip 62 used to guide the suspension member into the breast. Detail C is an enlargement of area C showing a portion of the support wire 70 that may be connected to an implanted strut, secured to tissue, or connected to the support wire of a second suspension member. [Figure 6]

[0073] 1 shows two views of a retainer 80 having a base 81, a tip 82, and a groove 83 for securing the retainer to the ladder structure of the anchoring member. [Figure 7]

[0074] 1 shows two views of a retainer 90 with a base 91, a tip 92, angled tines 93, and grooves 94 for securing the retainer to the ladder structure of the anchoring member. [Figure 8]

[0075] 1 shows an introducer tool 100 with a straight needle 101 inserted into an introducer housing tip 102 connected to an anchoring member 103 of a hanging member 104. Detail D is an enlargement of area D showing the distal end (105) of the introducer tool inserted into the introducer housing tip 102 and the connection 106 of the introducer housing tip 102 to the ladder structure 107 of the anchoring member. [Figure 9]

[0076] 1 shows a strut 110 comprising a first arm 111 having a first end 112 and a second end 113, a second arm 114 having a first end 115 and a second end 116, and an element 117 having a first end 118 and a second end 119, where the second end of the first arm is connected to a first end of the element and the second end of the second arm is connected to a second end of the element. A blunt-tipped needle 122 is connected to the first end of first arm 111, and a blunt-tipped second needle 123 is connected to the first end 115 of second arm 114. Detail F is an enlargement of region F, showing perforations 120 in the element and tines 121 on the surface of the element. [Figure 10]

[0077] 1 illustrates a patient's breast contour 130 and breast NAC 131, and an introducer tool 132 loaded with a first suspension member 133 inserted into a first side of the patient's breast. The introducer tool loaded with the first suspension member is inserted into the breast through a puncture incision site 134 in the direction indicated by the arrow. [Figure 11]

[0078] 1 illustrates a patient's breast contour 140 and the patient's NAC 141, a first suspension member 142 deployed on a first side of the patient's breast, and an introducer tool 143 loaded with a second suspension member 144 inserted on a second side of the patient's breast. The first suspension member is inserted into the patient's breast through puncture incision site 145, and the second suspension member is inserted into the breast through puncture incision site 146 in the direction indicated by the arrows. [Figure 12]

[0079] 1 illustrates a patient's breast contour 150 and the patient's NAC 151, a first suspension member 152, a second suspension member 153, and an introducer tool 154 loaded with struts 155 for insertion of the struts into the patient's breast superior to the patient's NAC. The first suspension member is inserted into the patient's breast through puncture incision site 156, and the second suspension member and strut are inserted into the patient's breast through puncture incision site 157. [Figure 13]

[0080] 1 illustrates a patient's breast contour 160 and the patient's NAC 161, a first suspension member 162, a second suspension member 163, an introducer tool 164 loaded with struts 165 inserted through a puncture incision site 166, and the distal tip of introducer tool 167 exiting through a puncture incision site 168. The first suspension member is inserted into the patient's breast through puncture incision site 168, and the second suspension member is inserted into the patient's breast through puncture incision site 166. DETAILED DESCRIPTION OF THE INVENTION

[0069]

[0081] Before describing the present invention in detail, it should be understood that the present invention is not limited to the particular variations described herein, as various changes or modifications may be made to the described invention and equivalents may be substituted without departing from the spirit and scope of the invention. As will be apparent to those skilled in the art upon reading this disclosure, each of the individual embodiments described and illustrated herein has distinct components and features that may be readily separated or combined with features of any of the other embodiments without departing from the scope or spirit of the invention. Furthermore, many modifications may be made to adapt a particular situation, material, composition of matter, process, process act(s), or step(s) to the objective, spirit, or scope of the present invention. All such modifications are intended to be within the scope of the claims made herein.

[0070]

[0082] Methods described herein may be carried out in any order of the recited events that is logically possible, as well as the recited order of events. Furthermore, when a range of values ​​is presented, it is understood that every intervening value between the upper and lower limit of that range, and any other stated or intervening value in that stated range, is encompassed within the invention. It is also contemplated that any optional features of the described inventive variations may be set forth and claimed independently or in combination with any one or more of the features described herein.

[0071]

[0083] All existing subject matter (e.g., publications, patents, patent applications, and hardware) referred to in this specification is incorporated herein by reference in its entirety, except to the extent that such subject matter may conflict with the subject matter of the present invention, in which case what is present in this specification shall take precedence.

[0072]

[0084] Reference to a singular item includes the possibility that there are plural of the same items. More specifically, as used in this specification and the appended claims, the singular forms "a," "an," "said," and "the" include plural referents unless the context clearly dictates otherwise. It is further noted that the claims may be drafted to exclude optional elements. Accordingly, this statement is intended to serve as a predicate for use of exclusive terminology such as "solely," "only," and the like, or for use of a "negative" limitation in connection with the recitation of claim elements.

[0073]

[0085] 1-2, the anatomy of a patient's breast and a system for breast lifting are illustrated to facilitate understanding of the present invention. In particular, FIG. 1 illustrates a patient's breast contour 1 and NAC 2, and an implant for lifting the breast, comprising a first suspension member 3, a second suspension member 4, and struts 5. The suspension members are inserted into the medial and lateral sides of the breast and raised superiorly to lift the breast. After tensioning the suspension members to lift the breast, the suspension members may be secured directly to the patient's tissue, secured to each other, or preferably connected at connection point 6 to struts 5 inserted into the breast above the patient's NAC.

[0074]

[0086] FIG. 2 illustrates an implant and tool system for mastopexy, including a first suspension member 10, a second suspension member 11, a strut 12, and an introducer tool 13 with two straight needles. The introducer tool is used to implant the first and second suspension members medially and laterally into the breast. The struts are implanted into the breast superior to the NAC. After insertion into the breast, the first and second suspension members are lifted superiorly to tension the suspension members and lift the breast. The lifted breast can be held in place by connecting the tensioned suspension members to the struts, by anchoring the suspension members to the patient's tissue, or by connecting the suspension members to each other.

[0075]

[0087] To further aid in understanding the following, the following definitions are provided: Unless otherwise defined as explained herein, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0076]

[0088] definition

[0089] As generally used herein, "absorbable" means that a material is broken down within the body and the breakdown products are eliminated or excreted from the body. The terms "absorbable," "resorbable," "degradable," and "erodible," with or without the prefix "bio," may be used interchangeably herein to describe materials that are broken down and gradually absorbed, excreted, or eliminated by the body, whether the breakdown is due primarily to hydrolysis or is mediated by metabolic processes.

[0077]

[0090] As used generally herein, a "bioactive agent" refers to a therapeutic, prophylactic, or diagnostic agent, preferably an agent that promotes healing and regeneration of host tissue, and a therapeutic agent that prevents, inhibits, or eliminates infection. "Bioactive agent" includes a single such agent and is intended to include a plurality.

[0078]

[0091] As generally used herein, "blend" refers to a physical combination of different polymers, as opposed to a copolymer formed from two or more different monomers.

[0079]

[0092] "Burst strength," as generally used herein, is determined according to ASTM D6797-02 (Standard Test Method for Burst Strength of Fabrics - Constant Rate of Expansion (CRE) Ball Burst Test) at ambient conditions using a ball burst fixture with a 1.6 cm circular opening and a 1 cm diameter semicircular probe.

[0080]

[0093] As generally used herein, "copolymer of poly-4-hydroxybutyric acid" refers to any polymer containing 4-hydroxybutyric acid with one or more different hydroxy acid units.

[0081]

[0094] "Endotoxin content," as generally used herein, refers to the amount of endotoxin present in an implant or sample, as determined by the Limulus Amebocyte Extract (LAL) assay.

[0082]

[0095] The "inframammary sulcus" or "IMF" as generally used herein is the location where the inferior pole of the breast meets the chest wall.

[0083]

[0096] "Lower pole," as generally used herein, means the portion of the breast located between the inframammary fold (IMF) and the nipple meridian reference that protrudes away from the chest wall.

[0084]

[0097] "Molecular weight," as generally used herein, unless otherwise specified, refers to weight average molecular weight (Mw) rather than number average molecular weight (Mn), and is measured by GPC against polystyrene.

[0085]

[0098] As generally used herein, "poly-4-hydroxybutyrate" refers to a homopolymer containing 4-hydroxy acid units, which may be referred to herein as P4HB or TephaFLEX® biomaterial (manufactured by Tepha, Inc., Lexington, Massachusetts).

[0086]

[0099] As generally used herein, a "retainer" refers to a feature incorporated into an anchoring member that can engage tissue. Retainers generally have a sharp tip for engaging tissue. Examples of suitable retainers that can be incorporated into an anchoring member include hooks, darts, anchors, and barbs.

[0087]

[0100] As generally used herein, "suture pull-out strength" refers to the peak load (kg) at which the implant fails to hold the suture. This is determined using a tensile tester by clamping the implant to a horizontal support plate, threading a loop of suture through the implant at a distance of 1 cm from the edge of the implant, and securing the suture arm to a fiber grip positioned above the implant. The test is performed at a crosshead speed of 100 mm / min, and the peak load (kg) is recorded. The suture is selected so that the implant fails before the suture fails.

[0088]

[0101] "Upper pole" as generally used herein means the upper portion of the breast located between the upper pole reference and the nipple meridian reference and projecting away from the chest wall.

[0089]

[0102] Materials for preparing scarless mastopexy implants

[0103] In embodiments, implants and mastopexy systems have been developed using a variety of materials to perform blunt ablative mastopexy procedures that cause minimal visible scarring. The implants lift tissue within the breast, creating an aesthetically pleasing breast. The implants create new tissue planes within the breast that can support the load of the lifted breast for an extended period of time. The implants avoid the need to use sling devices to lift the breast and extensive dissection of breast tissue for implantation of the sling devices, which can cause significant visible scarring of the breast.

[0090]

[0104] A. Polymers for preparing implants and systems for mammopexy

[0105] Mastopexy implants may comprise permanent materials such as non-degradable thermoplastic polymers, including polymers and copolymers of ethylene and propylene, such as ultra-high molecular weight polyethylene, ultra-high molecular weight polypropylene, nylon, polyesters such as poly(ethylene terephthalate), poly(tetrafluoroethylene), polyurethane, poly(ether-urethane), poly(methyl methacrylate), polyether ether ketone, polyolefins, and poly(ethylene oxide). However, the implant preferably comprises an absorbable material, more preferably a thermoplastic or polymeric absorbable material, and even more preferably the implant is made entirely from an absorbable material. In embodiments, a system for mastopexy may comprise a permanent material used to facilitate delivery of the implant and an implant comprising an absorbable material. For example, a system for mastopexy may comprise an implant with a suspension member comprising an absorbable material and a sheath made from a permanent material used for delivery of the implant.

[0091]

[0106] In one preferred embodiment, the implant is made from one or more absorbable polymers, preferably absorbable thermoplastic polymers and copolymers. Implants may be prepared from, for example, but not limited to, polymers of glycolic acid, lactic acid, 1,4-dioxanone, trimethylene carbonate, 1,4-butanediol, succinic acid, adipic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, ε-caprolactone, including polyglycolic acid, polylactic acid, polydioxanone, polycaprolactone, copolymers of glycolic acid and lactic acid such as VICRYL®, MAXON®, and MONOCRYL® polymers, poly(lactide-co-caprolactone), poly(orthoesters), polyanhydrides, poly(phosphazenes), polyhydroxyalkanoates (PHAs), synthetically or biologically prepared polyesters, polycarbonates, tyrosine polycarbonates, polyamides (including synthetic and natural polyamides, polypeptides, and poly(amino acids)), polyesteramides, poly(alkylene alkylates), polyethers (polyethylene glycol ( The biocompatible polymers may be prepared from polymers such as polyethylene glycol (PEG) and polyethylene oxide (PEO), polyvinylpyrrolidone or PVP, polyurethanes, polyetheresters, polyacetals, polycyanoacrylates, poly(oxyethylene) / poly(oxypropylene) copolymers, polyacetals, polyketals, polyphosphates, (phosphorus-containing) polymers, polyphosphoesters, polyalkylene oxalates, polyalkylene succinates, poly(maleic acid), silk (including recombinant silk and silk derivatives and analogs), chitin, chitosan, modified chitosan, keratin, biocompatible polysaccharides, hydrophilic or water-soluble polymers such as polyethylene glycol (PEG) or polyvinylpyrrolidone (PVP) with blocks of other biocompatible or biodegradable polymers, for example, poly(lactic acid), poly(lactic-co-glycolide), or polycaprolactone and its copolymers, including random and block copolymers thereof. Preferably, the absorbable polymer or copolymer is substantially resorbed within a time frame of 1 to 24 months, more preferably within a time frame of 3 to 18 months, after implantation. Preferably, the absorbable polymer retains some residual strength for at least 2 weeks to 3 months.

[0092]

[0107] Blends of polymers, preferably absorbable polymers, can also be used to prepare mastopexy implants. Particularly suitable blends of absorbable polymers are prepared from absorbable polymers including, but not limited to, polymers containing glycolic acid, lactic acid, 1,4-dioxanone, trimethylene carbonate, 1,4-butanediol, succinic acid, adipic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, ε-caprolactone, or copolymers thereof.

[0093]

[0108] In a particularly preferred embodiment, poly-4-hydroxybutyrate (P4HB™ polymer, Tepha, Lexington, Massachusetts) or its copolymers are used to fabricate the implant. Copolymers include copolymers of P4HB with another hydroxy acid, such as 3-hydroxybutyrate, and copolymers of P4HB with glycolic or lactic acid monomers. Poly-4-hydroxybutyrate is a biocompatible, absorbable, strong, and flexible thermoplastic polyester (Williams et al., Poly-4-hydroxybutyrate (P4HB): a new generation of resorbable medical devices for tissue repair and regeneration, Biomed. Tech. 58(5):439-452 (2013)). Upon implantation, P4HB hydrolyzes to its monomers, which are metabolized to carbon dioxide and water via the Krebs cycle. In a preferred embodiment, the P4HB homopolymer and copolymers thereof have a weight average molecular weight Mw in the range of 50 kDa to 1,200 kDa (by GPC against polystyrene), more preferably 100 kDa to 600 kDa. Polymer weight average molecular weights of 50 kDa and above are preferred for processability and mechanical properties.

[0094]

[0109] In another preferred embodiment, the mastopexy implant comprises a polymer comprising at least a diol and a diacid. In a particularly preferred embodiment, the polymer used to prepare the mastopexy implant is poly(butylene succinate) (PBS), where the diol is 1,4-butanediol and the diacid is succinic acid. The poly(butylene succinate) polymer may also be a copolymer with other diols, other diacids, or combinations thereof. For example, the polymer may be a poly(butylene succinate) copolymer further comprising one or more of 1,3-propanediol, 2,3-butanediol, ethylene glycol, 1,5-pentanediol, glutaric acid, adipic acid, terephthalic acid, malonic acid, methylsuccinic acid, dimethylsuccinic acid, and oxalic acid. Examples of suitable poly(butylene succinate) copolymers are poly(butylene succinate-co-adipate), poly(butylene succinate-co-terephthalate), poly(butylene succinate-co-butylene methyl succinate), poly(butylene succinate-co-butylene dimethyl succinate), poly(butylene succinate-co-ethylene succinate), and poly(butylene succinate-co-propylene succinate). The poly(butylene succinate) polymer or copolymer thereof may further comprise one or more of a chain extender, a coupling agent, a crosslinking agent, and a branching agent. For example, poly(butylene succinate) polymers or copolymers thereof can be branched, chain extended, or crosslinked by adding one or more of the following agents: malic acid, trimethylolpropane, trimesic acid, citric acid, glycerol propoxylate, and tartaric acid. A particularly suitable agent for branching, chain extending, or crosslinking poly(butylene succinate) polymers or copolymers thereof is a hydroxycarboxylic acid unit. Preferably, the hydroxycarboxylic acid unit has two carboxyl groups and one hydroxyl group, two hydroxyl groups and one carboxyl group, three carboxyl groups and one hydroxyl group, or two hydroxyl groups and two carboxyl groups. In a preferred embodiment, the breast implant comprises poly(butylene succinate) containing malic acid as a branching, chain extending, or crosslinking agent.This poly(butylene succinate) copolymer may be referred to as poly(butylene succinate) crosslinked or chain-extended with malic acid, succinic acid-1,4-butanediol-malic acid copolyester, or poly(1,4-butylene glycol-co-succinic acid) crosslinked or chain-extended with malic acid. References to malic acid and other crosslinking, coupling, branching, and chain-extending agents include polymers prepared using these agents, and it should be understood that the agents may undergo further reactions during processing. For example, the agents may dehydrate during polymerization. Thus, poly(butylene succinate)-malic acid copolymer refers to a copolymer prepared from succinic acid, 1,4-butanediol, and malic acid. In another preferred embodiment, malic acid may be used as a branching, chain extender, or cross-linking agent to prepare copolymers of poly(butylene succinate) and adipate, which may be referred to as malic acid cross-linked or chain-extended poly[(butylene succinate)-co-adipate]. As used herein, "poly(butylene succinate) and copolymers" includes polymers and copolymers prepared using one or more of a chain extender, a coupling agent, a cross-linker, and a branching agent. In a particularly preferred embodiment, poly(butylene succinate) and copolymers thereof contain at least 70% by weight, more preferably 80% by weight, and even more preferably 90% by weight, of succinic acid and 1,4-butanediol units. Polymers comprising a diacid and a diol, including poly(butylene succinate) and its copolymers and others described herein, preferably have a weight average molecular weight (Mw) of 10,000 Da to 400,000 Da, more preferably 50,000 Da to 300,000 Da, and even more preferably 100,000 Da to 200,000 Da, based on gel permeation chromatography (GPC) versus polystyrene standards. In a particularly preferred embodiment, the polymers and copolymers have a weight average molecular weight of 50,000 Da to 300,000 Da, more preferably 75,000 Da to 300,000 Da. In one preferred embodiment, the poly(butylene succinate) or copolymers thereof used to prepare implants or implant components have the following properties: 1.23 to 1.26 g / cm.3 a density of -31°C to -35°C, a glass transition temperature of 113°C to 117°C, a melting point of 113°C to 117°C, a melt flow rate (MFR) at 190°C / 2.16 kgf of 2 to 10 g / 10 min, and a tensile strength of 30 to 60 MPa.

[0095]

[0110] B. Additives

[0111] Certain additives may be incorporated into the implant, preferably in the absorbable polymer, copolymer, or blend thereof used to make the implant. Preferably, these additives are incorporated during the compounding process to produce pellets that can then be melt-processed. For example, the pellets may be extruded into fibers suitable for making the implant. In another embodiment, the additives may be incorporated using a solution-based process, for example, fibers may be spun from a solution of the polymer and one or more additives.

[0096]

[0112] In a preferred embodiment, the additive is biocompatible, and more preferably, the additive is both biocompatible and absorbable.

[0097]

[0113] In one embodiment, the additive may be a nucleating agent and / or a plasticizer. These additives may be added in an amount sufficient to produce the desired results. Generally, these additives may be added in an amount between 1% and 20% by weight. Nucleating agents may be incorporated to increase the crystallization rate of a polymer, copolymer, or blend. Such agents may be used, for example, to facilitate implant fabrication and improve the mechanical properties of the implant. Suitable nucleating agents include, but are not limited to, salts of organic acids such as calcium citrate, polymers or oligomers of PHA polymers and copolymers, high melting point polymers such as PGA, talc, micronized mica, calcium carbonate, ammonium chloride, and aromatic amino acids such as tyrosine and phenylalanine.

[0098]

[0114] Plasticizers that may be incorporated into compositions for preparing implants include di-n-butyl maleate, methyl laurate, dibutyl fumarate, di(2-ethylhexyl)(dioctyl) maleate, paraffin, dodecanol, olive oil, soybean oil, polytetramethylene glycol, methyl oleate, n-propyl oleate, tetrahydrofurfuryl oleate, epoxidized linseed oil, 2-ethylhexyl epoxythalate, glycerol triacetate, methyl linoleate, dibutyl fumarate, methyl acetylricinoleate, Suitable plasticizers include, but are not limited to, acetyl tri(n-butyl) citrate, acetyl triethyl citrate, tri(n-butyl) citrate, triethyl citrate, bis(2-hydroxyethyl) dimerate, butyl ricinoleate, glyceryl tri-(acetylricinoleate), methyl ricinoleate, n-butylacetyl ricinoleate, propylene glycol ricinoleate, diethyl succinate, diisobutyl adipate, dimethyl azelate, di(n-hexyl) azelate, tri-butyl phosphate, and mixtures thereof. Particularly suitable plasticizers are citrate esters.

[0099]

[0115] C. Bioactive Agents

[0116] Implants can be loaded or coated with bioactive agents. Bioactive agents can be included in implants for a variety of reasons. For example, bioactive agents can be included to enhance tissue ingrowth into the implant, enhance tissue maturation, provide delivery of active agents, enhance wettability of the implant, prevent infection, and enhance cell attachment. Bioactive agents can also be incorporated into the structure of the implant.

[0100]

[0117] The implant may contain a cell adhesion factor, including a cell adhesion polypeptide. As used herein, the term "cell adhesion polypeptide" refers to a compound having at least two amino acids per molecule that can bind cells via cell surface molecules. Cell adhesion polypeptides include any of the extracellular matrix proteins known to play a role in cell adhesion, including fibronectin, vitronectin, laminin, elastin, fibrinogen, collagen types I, II, and V, and synthetic peptides with similar cell adhesion properties. Cell adhesion polypeptides also include peptides derived from any of the aforementioned proteins, including fragments or sequences containing the binding domain.

[0101]

[0118] The implant can incorporate a wetting agent designed to improve the wettability of the surface of the implant structure, allowing fluids to be readily absorbed onto the implant surface, as well as to promote cell attachment and / or modify the water contact angle of the implant surface. Examples of wetting agents include polymers of ethylene oxide and propylene oxide, such as polyethylene oxide, polypropylene oxide, or copolymers thereof, such as PLURONICS®. Other suitable wetting agents include surfactants or emulsifiers.

[0102]

[0119] The implants may contain gels, hydrogels, or living hydrogel hybrids to further enhance wetting properties and promote cell growth throughout the thickness of the scaffold. Hydrogel hybrids consist of living cells encapsulated in biocompatible hydrogels such as gelatin, methacrylated gelatin (GelMa), silk gel, and hyaluronic acid (HA) gel.

[0103]

[0120] The implants may contain active agents designed to stimulate cell ingrowth, including cell signaling molecules such as growth factors, cell differentiation factors, cell recruitment factors, cell receptors, cell binding factors, cytokines, and molecules that promote cell migration, cell division, cell proliferation, and extracellular matrix deposition. Such active agents include fibroblast growth factors (FGFs), transforming growth factors (TGFs), platelet-derived growth factors (PDGFs), epidermal growth factors (EGFs), granulocyte-macrophage colony-stimulating factors (GMCSFs), vascular endothelial growth factors (VEGFs), insulin-like growth factors (IGFs), hepatocyte growth factors (HGFs), interleukin-1B (IL-1B), interleukin-8 (IL-8), and nerve growth factors (NGFs), and combinations thereof.

[0104]

[0121] Other bioactive agents that can be incorporated into the implant include antimicrobial agents, particularly antibiotics, antiseptics, oncological agents, anti-scarring agents, anti-inflammatory agents, anesthetics, small molecule drugs, anti-angiogenic and pro-angiogenic factors, immunomodulators, and blood coagulants. Bioactive agents can be proteins such as collagen and antibodies, peptides, polysaccharides such as chitosan, alginate, keratin, hyaluronic acid, and their derivatives, nucleic acid molecules, low-molecular-weight compounds such as steroids, inorganic materials such as hydroxyapatite, or complex mixtures such as platelet-rich plasma. Suitable antimicrobial agents include bacitracin, biguanides, triclosan, gentamicin, minocycline, rifampin, vancomycin, cephalosporins, copper, zinc, silver, and gold. Nucleic acid molecules can include DNA, RNA, siRNA, miRNA, antisense molecules, or aptamers.

[0105]

[0122] Implants may also include allograft and xenograft materials, including acellular dermal matrix materials and small intestinal submucosa (SIS).

[0106]

[0123] Human fat, such as autologous fat graft, may also be added or injected throughout or into the implant scaffold. Lipoaspirate tissue from the patient may be added to the interior or exterior surfaces of the implant. In areas where the implant is porous, adipose tissue and globules may be held in place within the pores of the implant.

[0107]

[0124] In another embodiment, the harvested adipose tissue is mixed with a natural or synthetic fluidized scaffolding matrix that is added to the implant to help hold the fat globules in place within the implant. Examples of natural and synthetic fluidized scaffolding matrices include, but are not limited to, hydrogels, water-soluble polymers, polyesters, and hydrophilic polymers including polyethylene oxide, polyvinyl alcohol, as well as polymers of fibrin, thrombin, alginate, collagen, chitosan, and silk.

[0108]

[0125] In yet another preferred embodiment, the implant may incorporate a system for controlled release of a therapeutic or prophylactic agent.

[0109]

[0126] Components for preparing mastopexy implants

[0127] Various methods can be used to manufacture mastopexy implants and systems. The implants may include the fibers disclosed herein.

[0110]

[0128] Fibers for creating mastopexy implants

[0129] The implant may include fibers. The fibers are preferably made from an absorbable thermoplastic polymer, more preferably from an absorbable thermoplastic polyester. The fibers are preferably made from the absorbable materials listed above. The fibers may be monofilament fibers, multifilament fibers, or a combination thereof. Particularly suitable implants comprise monofilament fibers. The fibers may be unoriented, partially oriented, highly oriented, or a combination thereof, but are preferably oriented. The fibers preferably have an elongation to break value of 3% to 100%, more preferably 3% to 50%. The fibers may have a diameter ranging from 1 micron to 5 mm, more preferably 10 microns to 1 mm, and even more preferably 50 microns to 500 microns. The fibers may have a weight average molecular weight ranging from 10 kDa to 1,200 kDa, but more preferably 50 kDa to 600 kDa. The fibers preferably retain at least 50% of their initial strength in vivo for 1 to 6 months, more preferably 2 to 4 months. The fibers preferably completely degrade within 5 years of implantation, more preferably within 2 years of implantation. The fibers preferably have an initial tensile strength in the range of 1 to 1,300 MPa, more preferably 50 MPa to 1,000 MPa.

[0111]

[0130] In one embodiment, the implant comprises fibers having one or more of the following properties: elongation to break of 10-100%, and tensile strength of 300-1,000 MPa.

[0112]

[0131] In one preferred embodiment, a mastopexy implant comprises fibers made from P4HB, more preferably fibers made from P4HB monofilament fibers. The P4HB monofilament fibers are preferably partially or fully oriented (i.e., partially or fully stretched after extrusion). In one embodiment, P4HB monofilament fibers can be produced according to the following method: Bulk P4HB resin in pellet form is dried to less than 300 ppm moisture using a rotary vane vacuum pump system. The dried resin is transferred to an extruder feed hopper with a nitrogen purge to keep the pellets dry. The pellets are gravity fed into a cooled feeder section and introduced into an extruder barrel fitted with an extrusion screw having a 1.5 inch (3.8 cm) diameter and an L / D ratio of 30:1. The extruder barrel preferably contains five heating zones (or extrusion zones) and is manufactured by American Kuhne. The heated, softened resin from the extruder is fed to a heated metering pump (melt pump), which feeds the extruded resin to a heated block and eight-hole spinneret assembly. Suitable processing profile ranges are 40°C to 260°C for temperature and 400 psi to 2000 psi (2.76 MPa to 13.8 MPa) for pressure. The molten filaments are preferably water quenched and optionally transported to an orientation line, preferably a three-stage orientation line, and optionally relaxed in-line before winding the monofilament onto a spool. This procedure can be used to produce P4HB monofilament fibers having, for example, one or more of the following properties: elongation to break of 10 to 100%, tensile strength of 50 to 1,300 MPa, and tensile modulus of 70 to 1,000 MPa. The P4HB monofilament fibers can have an average diameter ranging from 20 microns to 1 mm, but more preferably from 50 microns to 500 microns. In one embodiment, the P4HB monofilament fiber may have USP (United States Pharmacopoeia) sizes 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 2-0, 3-0, 4-0, 5-0, 6-0, 7-0, 8-0, 9-0, 10-0, 11-0, and 12-0.

[0113]

[0132] In another embodiment, a mastopexy implant comprises fibers made from P4HB multifilament fibers. Multifilament fibers of P4HB or its copolymers can be spun, for example, as follows: The polymer, copolymer, or blend thereof is pelletized and dried so that the moisture content of the polymer, copolymer, or blend is less than 300 ppm. The dried pellets are placed in the feed hopper of an extruder and protected from moisture, for example, by a dry nitrogen purge. The pellets are gravity fed into a cooled feeder section and introduced into a suitable extruder barrel equipped with an extruder screw. One suitable extruder barrel has a diameter of 0.75 inches (1.91 cm) and a length of 25.69 inches (65.3 cm), and is equipped with an extruder screw having an L / D ratio of 30:1. American Kuhne manufactures suitable extruders. In a preferred embodiment, the extruder barrel contains four heating zones, and a processing profile is established with temperatures ranging from 40°C to 300°C and pressures ranging from 200 psi to 3,000 psi (1.38 MPa to 20.7 MPa). The heated and softened polymer, copolymer, or blend is fed to a metering pump, and the melt pump feeds the resin to a heated block. The spin head is equipped with a spin pack containing a filter medium (screen) and a spinneret containing the desired number of holes for forming the individual filaments of the multifilament yarn. For example, the spinneret may have 15, 30, 60, 120, or more or less holes. The extruded filaments exit the spinneret and pass through a heated chimney before being cooled. A spin finish is preferably applied to the yarn, and the yarn can either be collected on a winder or oriented in-line. Suitable spin finishes include PEG 400 and Tween 20™. The multifilament fiber may have a tensile strength of between 1 and 12 grams per denier.

[0114]

[0133] In another preferred embodiment, a mastopexy implant comprises fibers made from poly(butylene succinate) or copolymers thereof, more preferably monofilament fibers of poly(butylene succinate) or copolymers thereof. The monofilament fibers of poly(butylene succinate) or copolymers thereof are preferably partially or fully oriented (i.e., partially or fully stretched after extrusion). In one embodiment, monofilament fibers of poly(butylene succinate) or copolymers thereof can be produced according to the following method: Bulk resin is dried overnight under vacuum to less than 0.01% (w / w) moisture. Dried pellets of polymer are fed under a nitrogen blanket into the extruder barrel of a 2.5-inch American Kuhne single-screw extruder (30:1 L:D, 3:1 compression) equipped with a Zenith-type metering pump, Model HPB917, a die with a 0.5 mm 8-hole spinneret, and eight heating zones. The extruder's eight heating zones are set between 40°C and 200°C. The extruder is equipped with a quench bath filled with water at 35-70°C, with a 10 mm gap between the bottom of the spinneret and the water surface. The quench bath is followed by two five-roll godets and three sets of high-temperature conduction chambers fed by the godets for multistage fiber orientation. The high-temperature chambers are set at temperatures between 50°C and 90°C. The final chamber is followed by another godet and then a multi-position Sahm winder. This procedure can be used, for example, to produce monofilament fibers of poly(butylene succinate) or its copolymers having one or more of the following properties: elongation to break of 10-100%, or more preferably 10-50%, tensile strength of 50-1,300 MPa, or more preferably 400-1,200 MPa, and tensile modulus of 50-3,000 MPa. Monofilament fibers of poly(butylene succinate) and its copolymers can have an average diameter ranging from 20 microns to 1 mm, but more preferably from 50 microns to 500 microns.In one embodiment, the monofilament fibers of poly(butylene succinate) or copolymers thereof can have USP (United States Pharmacopeia) sizes 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 2-0, 3-0, 4-0, 5-0, 6-0, 7-0, 8-0, 9-0, 10-0, 11-0, and 12-0.

[0115]

[0134] In another embodiment, a mastopexy implant comprises multifilament fibers made from poly(butylene succinate) and its copolymers. The multifilament fibers of poly(butylene succinate) or its copolymers are preferably partially or fully oriented (i.e., partially or fully stretched after extrusion). In one embodiment, multifilament fibers of poly(butylene succinate) or its copolymers can be produced according to the following method: Bulk resin is dried under vacuum to less than 0.01% (w / w) moisture. Dried polymer pellets are fed into the extruder barrel of an AJA (Alex James Associates, Greer, South Carolina) ¾ inch single screw extruder (24:1 L:D). The extruder barrel contained four heating zones, one metering pump, and one spin pack assembly. The pellets are gravity-fed into a cooled feeder section and introduced into an extruder with a temperature profile set as follows: Chimney 40°C-100°C, Spinneret 170°C±30°C, Pump 170°C±30°C, Block 170°C±30°C, Zone 4 160°C±40°C, Zone 3 150°C±40°C, Zone 2 120°C±50°C, Zone 1 30°C-40°C, and Feed Zone: Ambient temperature. The heated, homogenized molten resin from the extruder is fed into a heated metering pump (melt pump), which then feeds the extruded resin into a heated block and spinneret assembly. The spinneret has 30 holes with a capillary diameter of 0.200 mm and an L / D ratio of 2:1. (Spinnerets may be configured in other alternative ways. For example, spinnerets may be configured with capillary diameters of 0.150 to 0.300 millimeters (6 mils to 12 mils), 15, 120, and 240 holes, as well as larger and smaller diameters and numbers of holes.) Suitable processing temperature profiles range from 35°C to 250°C, with pressures ranging from 200 to 5,000 psi (1.38 MPa to 34.5 MPa) in the barrel and 200 to 5,000 psi (1.38 MPa to 34.5 MPa) in the spin pack.As the molten filaments exit the spin pack, they pass through a heated chimney collar, 6 to 12 inches long and ranging in temperature from 40°C to 100°C, and then through an air quench box. The spin pack is suspended vertically above the take-up roll, a distance sufficient to allow crystallization of the molten filaments and the application of a spin-finish lubricant. A 25% polyethylene 25 glycol 400 (PEG 400) aqueous spin-finish solution is used to hold the filaments together to form a yarn bundle. The speed of the take-up roll (typically 3 to 18 meters per minute) is set in proportion to the molten filament flow rate to control the denier of the as-spun yarn bundle. The as-spun yarn bundle is then conveyed to a Lessona winder for later offline orientation or to a take-up roll for in-line orientation over a series of cold and heated godet pairs and separator rolls. If desired, the spin finish can be reactivated by rewetting the yarn bundle with purified water, and the yarn can be drawn at a speed of 5 to 14 times and a temperature ranging from 50° C. to 90° C. This procedure can be used, for example, to produce multifilament fibers of poly(butylene succinate) or copolymers thereof having one or more of the following properties: elongation to break of 10 to 100%, or more preferably 10 to 50%, and a tenacity greater than 1 gram per denier, more preferably greater than 4 grams per denier, but less than 14 grams per denier.

[0116]

[0135] Fabric for making mastopexy implants

[0136] The fibers described herein can be processed into textiles, for example, by knitting, sewing, weaving, or crocheting. A particularly suitable textile for preparing mastopexy implants is a two-loop strand configuration. Another particularly suitable textile for use in preparing mastopexy implants is a mesh or warp-knit mesh, more preferably an absorbable warp-knit mesh.

[0117]

[0137] In embodiments, the fabrics and meshes used to prepare mastopexy implants have a compressibility of 0.6 N / cm 2 and 90N / cm 2 Between 1.2N / cm and 2.0N / cm, preferably 1.2N / cm 2 and 30N / cm 2 In embodiments, the fabrics and meshes used to prepare mastopexy implants have a burst strength three months after implantation that is at least 40% of their initial burst strength value.

[0118]

[0138] In embodiments, the fabrics and meshes used to prepare mastopexy implants are porous and can be replaced in vivo by host tissue that grows into and around the implant and is strong enough to support the breast. The diameter of the mesh or fabric pores is preferably greater than 25 μm, more preferably greater than 75 μm, and even more preferably greater than 250 μm, but less than 20 mm, more preferably less than 10 mm, and even more preferably less than 5 mm, to facilitate tissue ingrowth.

[0119]

[0139] Mastopexy implants comprising textiles such as knitted and woven meshes, as well as two-loop strand textiles, can be produced using fibers of P4HB or its copolymers and fibers of poly(butylene succinate) or its copolymers. Preferably, the fibers are monofilament fibers. Implants comprising oriented or partially oriented monofilament fibers of these polymers and copolymers have a long-term strength retention profile and can maintain some residual strength for as long as one year. The long-term strength retention of these fibers provides an extended period for tissue ingrowth into textiles made from these fibers. Tissue ingrowth into these textiles results in the formation of new tissue planes within the breast that can support breast lift. The long-term strength retention of the fibers and textiles also means that mastopexy implants comprising these fibers and textiles can provide short-term support for the lifted breast while new tissue planes develop within the breast.

[0120]

[0140] In other embodiments, mastopexy implants comprising a woven or knitted mesh comprising a two-loop strand configuration can be produced using fibers of polydioxanone, preferably monofilament fibers of polydioxanone, and more preferably oriented monofilament fibers of polydioxanone.

[0121]

[0141] Knitted P4HB mesh suitable for use in mastopexy implants can be prepared, for example, by the following method: P4HB monofilament fibers from 49 spools are pulled under constant tension onto the surface of a warp beam. The warp is a large, wide spool onto which individual fibers are wound in parallel to provide a sheet of fiber ready for coating with a 10% solution of Tween® 20 lubricant. The Tween 20 lubricant is applied to the surface of the fiber sheet by a rotating "kissing" roller immersed in a bath filled with Tween 20. The top surface of the roller is brought into contact with the fiber sheet, and the roller is rotated at a constant speed to provide a uniform application of the Tween 20 finish. Following application of the Tween 20, the fiber sheet is placed in a creel position so that each spooled fiber is aligned and wound alongside the next spooled fiber on the warp beam. The warp beam is then converted into the finished mesh fabric by interlocking loops. Eight parallel warp beams are mounted on the tricot machine let-off and fed to the knitting elements at a constant speed determined by the "runner length." Individual monofilament fibers from each beam are fed through a series of dynamic tensioning elements and down knitting "guides." Each fiber passes through a single guide fixed to the guide bar. The guide bar directs the fibers around needles, forming a mesh structure. The mesh fabric is then pulled off the needles by a take-down roller at a constant speed. The mesh fabric is then wound up and wound onto a roll. P4HB monofilament mesh produced according to this method can be ultrasonically scored with water, optionally heat-set in hot water, and optionally washed with 70% aqueous ethanol.

[0122]

[0142] In embodiments, fabrics and meshes made from P4HB monofilament have the following properties: (i) suture pull-out strength of at least 1 Kgf; (ii) burst strength of 0.1 to 100 Kg; (iii) thickness of 0.05 to 5 mm; and (iv) thickness of 5 to 800 g / m 2 and (v) a pore diameter of 5 μm to 5 mm. In embodiments, the woven fabric and monofilament mesh have one or more of the following properties: (i) a suture pull-out strength of 1 kgf to 20 kgf; (ii) a burst strength of 1 to 50 kgf, more preferably 10 to 50 kgf; (iii) a thickness of 0.1 to 1 mm; (iv) a pore diameter of 100 to 300 g / m 2 and (v) a pore diameter between 100 μm and 1 mm. In an embodiment, the P4HB monofilament mesh or woven fabric has one or more of the following characteristics: a pore diameter of 500±100 μm, a thickness of 0.5±0.2 mm, and a density of approximately 182±50 g / m 2 a suture pull-out strength of 5.6±2 kgf; and a burst strength of at least 15 Kg, more preferably at least 24.5 Kg.

[0123]

[0143] A knitted mesh of poly(butylene succinate) or its copolymers suitable for use in mastopexy implants can be prepared, for example, by the following method: Monofilament fibers from 49 spools are loaded onto a creel, aligned side-by-side, and pulled under constant tension onto the top surface of a "kissing" roller. The "kissing" roller rotates while partially immersed in a bath filled with a 10% solution of polyethylene glycol sorbitan monolaurate, polyethylene glycol, or other suitable lubricant. The lubricant is deposited on the surface of the sheet of fibers. Following application of the lubricant, the sheet of fibers is passed through comb guides and then wound onto a warp beam. The warp is a large, wide cylinder onto which the individual fibers are wound in parallel to provide the sheet of fibers. The warp beam is then converted into the finished mesh fabric by a double-sided knitting loop. Eight warp beams are loaded in parallel onto the letoff of a tricot machine and fed to the knitting elements at a constant speed determined by the "runner length." Each individual monofilament fiber from each beam is fed through a series of dynamic tensioning elements and down a knitting "guide." Each fiber passes through a single guide fixed to a guide bar. The guide bar directs the fiber around needles, forming a mesh fabric structure. The mesh fabric is then pulled from the needles by a take-down roller at a constant speed determined by the fabric "quality." The mesh fabric is then wound up and wound into a roll ready for scoring. The poly(butylene succinate) or copolymer monofilament mesh can then be ultrasonically scored with water and (i) heat-set (e.g., in a high-temperature conductive bath or oven), and then (ii) washed with 70% aqueous ethanol.

[0124]

[0144] Meshes and woven fabrics containing two-loop strand constructs made from monofilaments or multifilaments of poly(butylene succinate) or its copolymers preferably have the following properties: (i) suture pull-out strength of at least 10 N or at least 20 N; (ii) burst strength of 0.1 to 100 kgf, more preferably between 1 kgf and 50 kgf or greater than 0.1 kPa; (iii) thickness of 0.05 to 5 mm; and (iv) thickness of 5 to 800 g / m. 2 (v) an areal density of 5 μm to 5 mm, more preferably 100 μm to 1 mm, and (vi) a Taber stiffness of at least 0.01 Taber stiffness units, more preferably 0.1 to 19 Taber stiffness units. More preferably, these monofilament or multifilament meshes and woven fabrics have one or more of the following properties: (i) a suture pull-out strength of 1 kgf to 20 kgf, (ii) a burst strength of 1 to 50 kgf, more preferably 5 to 30 kgf, (iii) a thickness of 0.1 to 1 mm, and (iv) a density of 100 to 300 g / m 2 and (v) a pore diameter of 100 μm to 1 mm. In another preferred embodiment, the poly(butylene succinate) or copolymer thereof monofilament or multifilament mesh or woven fabric has one or more of the following properties: a pore diameter of 500±100 μm, a thickness of 0.4±0.3 mm, and approximately 182±50 g / m 2 a suture pull-out strength of 5.6±2 kgf, and a burst strength of at least 3 kgf, more preferably at least 6 kgf.

[0125]

[0145] Method for preparing a mastopexy implant and system for mastopexy - Patent Application 20070122999

[0146] Various methods can be used to manufacture mastopexy implants and systems for mastopexy. Preferably, the mastopexy implant is absorbable and designed to support the mechanical forces acting on the breast during normal activity at the time of implantation and to allow stable transfer of the mechanical forces to regenerating host tissue that can support the same mechanical forces after the implant has degraded.

[0126]

[0147] Hanging material

[0148] In an embodiment, the mastopexy implant comprises a suspension member. The suspension member can be used to suspend a patient's breast. The suspension member is not a sling designed to create a hammock under the lower pole of the breast to suspend the breast. Instead, one or more suspension members are implanted on the outside of the breast to suspend the outside of the breast, and one or more suspension members are implanted on the inside of the breast to suspend the inside of the breast. In a preferred embodiment, a suspension member is implanted on each side of the breast to suspend the breast. In an embodiment, the suspension member 20 comprises a support wire 21 and an anchoring member 24 (see FIG. 3). The support wire 21 has a first end 22 and a second end 23. The anchoring member 24 has a first end 25 and a second end 26. The suspension member comprises a support wire connected to the anchoring member. The support wire 21 is connected at its second end 23 to the first end 25 of the anchoring member 24. The anchoring member 24 is connected to the support wire 21 only at its first end 25. The anchoring member 24 is not connected to the second support wire at its second end 26. In a sense, the second end of the anchoring member is shown as a free end in FIG.

[0127]

[0149] The suspension member 20 is designed to lift a patient's breast by engaging breast tissue with the anchoring member 24 and lifting the engaged tissue by applying a force in an inferior-to-superior direction to the support wire 21. An upward force on the support wire is transmitted to the anchoring member, resulting in an upward movement of the breast tissue. In embodiments, the suspension member is designed to be implanted on the lateral and medial sides of the breast to lift the breast.

[0128]

[0150] The suspension member is designed to be a temporary scaffold; that is, it is designed to initially suspend the breast, but to be replaced by new tissue as the suspension member degrades after implantation. Over time, the support of the breast provided by the suspension member is replaced by support from the host tissue. In this way, the breast is suspended by the suspension member, but is maintained in that suspended position long term by the ingrowth of breast tissue. In embodiments, the suspension member retains at least 15% of its initial strength, preferably at least 30% of its initial strength, and more preferably at least 50% of its initial strength, for 12 weeks after implantation.

[0129]

[0151] In embodiments, the lifting member is designed to create new tissue planes within the breast that can be used to support the lifted breast as the suspension member degrades and loses strength. In embodiments, the suspension member is designed to distribute the load of the lifted breast over the area of ​​the new tissue plane. The use of a suspension member to distribute the load of the breast provides a more durable result and avoids load concentration, potential cheese-wiring, and loss of tissue traction that can occur when sutures alone are used in a breast lift procedure. In this regard, the suspension member may be particularly desirable when lifting breasts with a high fatty tissue content, where sutures are prone to penetrating the breast tissue. It has been found that the width / profile of the suspension member 20 does not need to be large to distribute the load of the lifted breast over an expanded area and still be effective. The low-profile suspension member designs described herein (a) allow the suspension member to be deployed only through a puncture wound and narrow channel, (b) provide sufficient support for the breast, and (c) avoid the above-mentioned problems associated with sutures and slings.

[0130]

[0152] To suspend the breast, the suspension member is designed to support a load of at least 5N, more preferably at least 10N, more preferably at least 60N, but less than 500N.

[0131]

[0153] In embodiments, the suspension member comprises a porous element that allows for tissue ingrowth.

[0132]

[0154] The suspension member may further comprise a tensioner designed to increase or decrease the tension of the suspension member against the breast tissue and to allow for adjustment of breast lift.

[0133]

[0155] The suspension member is sized to be implanted through a stab incision made in a patient's breast. In embodiments, the suspension member is designed to be used without extensive dissection of patient tissue. In embodiments, the suspension member is designed to be used without removal of patient tissue. In embodiments, the suspension member is designed to be delivered minimally invasively. In embodiments, the suspension member is designed to be folded or rolled up prior to implantation into a patient. After implantation, the folded or rolled suspension member can be deployed into a desired shape within the breast. In embodiments, the suspension member has shape memory. After implantation, the shape-memory suspension member can be deployed into a desired shape within the breast. In embodiments, the suspension member is designed to be implanted within a channel formed in the breast, preferably by blunt dissection. In embodiments, the suspension member is designed to be inserted through an entry point in the upper pole of the breast. In embodiments, the suspension member is designed to be inserted through an entry point in the lower pole of the breast.

[0134]

[0156] In embodiments, the suspension member comprises fibers. In embodiments, the fibers are made from an absorbable thermoplastic polymer, and in embodiments, the fibers made from absorbable thermoplastic polymers are oriented. Orientation means that the fibers are stretched. Stretching the fibers causes molecular alignment of the polymer chains in the fibers, increasing the tensile strength of the fibers. ("Orientation" in this context does not relate to the geometry of the fibers relative to another object.) In embodiments, the suspension member comprises monofilament fibers, preferably absorbable monofilament fibers, and more preferably oriented polymeric absorbable monofilament fibers.

[0135]

[0157] In embodiments, the hanging member comprises one or more of the polymers listed in Section A. Preferably, the hanging member comprises one or more of poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0136]

[0158] In embodiments, the implant comprises a suspension member and one or more bioactive agents. The bioactive agents may be coated on the suspension member or incorporated into the suspension member. Particularly suitable bioactive agents include antimicrobial agents, antibiotics, proteins, and agents that promote tissue ingrowth. In embodiments, the implant comprises a suspension member and one or more of cells, stem cells, gels, hydrogels, adipose tissue, autologous fat, lipoaspirate, adipocytes, and fibroblasts. These cells and substances may be coated on the surface of the suspension member or incorporated into the body of the suspension member.

[0137]

[0159] In embodiments, the hanging member has an endotoxin content of less than 20 endotoxin units. In embodiments, the hanging member is sterilized. In embodiments, the hanging member is sterilized by ethylene oxide, cold ethylene oxide, electron beam irradiation, or gamma irradiation.

[0138]

[0160] support line

[0161] In an embodiment, the suspension member comprises a support wire. The support wire has a first end and a second end. The second end of the support wire is attached to the first end of the anchoring member. FIG. 3 shows an example of a support wire 21 attached at its second end 23 to a first end 25 of an anchoring member 24. In this example, the anchoring member has a ladder-like structure 24. FIG. 4 shows an example of a support wire 31 attached at its second end to a first end of an anchoring member 32, the anchoring member having a ladder-like structure connected to three retainers 33. In an embodiment, the suspension member is implanted into a patient's breast with the support wire 31 positioned superior to the anchoring member. During implantation, a force is applied to the support wire in an inferior-to-superior direction such that the retainers located on the anchoring member engage nearby breast tissue and lift the breast tissue in an inferior-to-superior direction.

[0139]

[0162] In an embodiment, the support wire of the hanging member may have a length of 10 to 40 cm, more preferably 15 to 25 cm.

[0140]

[0163] In an embodiment, the support wire comprises monofilament fibers, more preferably monofilament fibers having an average diameter of 0.1 to 0.4 mm, more preferably 0.2 to 0.25 mm. In an embodiment, the support wire comprises multifilament fibers. In an embodiment, the support wire comprises a braid.

[0141]

[0164] In embodiments, the support wire comprises fixation elements designed to engage breast tissue and help secure the support wire to breast tissue after the suspension members have been used to lift the breasts.

[0142]

[0165] In embodiments, the fixation elements are connected to or incorporated into the support wire and extend outwardly from the support wire.

[0143]

[0166] In embodiments, the fixation elements are small filaments extending from the support wire. The small filaments may be monofilaments or multifilaments.

[0144]

[0167] In an embodiment, the support wire with the fastening elements is a one-piece structure. An example of a support wire with fastening elements having a two-loop chain stitch structure is shown in detail A of Figure 4, which is an enlargement of area A of support wire 31. In another embodiment, the support wire with fastening elements has a one-loop chain stitch structure.

[0145]

[0168] In embodiments, the support wire with the fixation elements is formed by weaving. In other embodiments, the fixation elements are bound, fused, or welded to the support wire. In embodiments, the support wire with the fixation elements is molded.

[0146]

[0169] In embodiments, the fixation element comprises an absorbable polymer. In embodiments, the fixation element comprises one or more of the polymers listed in Section A.

[0147]

[0170] In embodiments, the support wire comprises an absorbable polymer. In embodiments, the support wire comprises one or more of the polymers listed in Section A. Preferably, the support wire comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0148]

[0171] In an embodiment, the suspension member comprises a tether member having a woven structure and a retainer, and a support wire connected at a second end to a first end of the tether member, all components comprising the same polymer, preferably poly-4-hydroxybutyric acid or a copolymer thereof, poly(butylene succinate) or a copolymer thereof, or polydioxanone.

[0149]

[0172] Mooring member

[0173] In an embodiment, the suspension member 20 comprises an anchoring member 24 (see FIG. 3 ). The anchoring member has a first end 25 and a second end 26. The anchoring member 24 is attached to the support wire 21 at its first end 25. The anchoring member 24 is not connected to the support wire at its second end 26. The second end is a free end. The anchoring member is not a sling or hammock. The anchoring member 24 does not have an enlarged 2D or 3D shape that can extend to the lower pole of the breast. In contrast, exemplary shapes of the anchoring member are a band, ribbon, or strip. In an embodiment, the anchoring member has the appearance of an unfolded braid or bracelet of thread. Its length is much greater than its width.

[0150]

[0174] The anchoring members are designed to engage breast tissue. After engaging the breast tissue, the suspension member can be used to lift the patient's breast. Unlike sutures, the anchoring members contact the breast tissue over an expanded area, allowing the anchoring members to distribute the load applied during breast lifting over a wider area of ​​breast tissue. Distributing the load over an expanded area helps prevent the anchoring members from tearing the breast tissue or applying excessive tension to localized areas of the breast, which can result in undesirable breast appearance. The anchoring members are particularly useful for lifting fatty breast tissue, unlike sutures, which may cut or not be retained by fatty tissue. In addition to providing an improved means for lifting breast tissue, the anchoring members provide a means for providing long-term support for the lifted breast by creating expanded new tissue planes within the breast. The new tissue planes result from tissue ingrowth into the anchoring members. The new tissue planes provide internal support for the lifted breast.

[0151]

[0175] The anchoring member is preferably sized to be delivered through a puncture wound using an introducer tool. The anchoring member may be rolled or folded to allow delivery to the implantation site. The anchoring member may have shape memory, allowing the anchoring member to regain its shape after being delivered to the implantation site by the introducer tool.

[0152]

[0176] The anchoring members are designed to be inserted either externally or internally into the breast to lift the breast tissue. Preferably, at least one anchoring member is inserted externally and at least one anchoring member is inserted internally. The entire breast can be lifted using an anchoring member on either side of the breast.

[0153]

[0177] In embodiments, the anchoring member of the hanging member may have a length of 8 to 20 cm, more preferably 12 to 16 cm, and a width of 4 to 20 mm, more preferably 6 to 12 mm. In one preferred embodiment, the anchoring member has a length-to-width ratio of 5:50, more preferably 10:25. Stated another way, the length of the anchoring member is preferably 10 to 25 times its width.

[0154]

[0178] The anchoring member preferably retains at least 15% of its initial strength, more preferably at least 30%, and even more preferably at least 50% of its initial strength for 12 weeks after implantation. The anchoring member is preferably capable of withstanding a burst force of at least 1 N, more preferably at least 10 N, but less than 1,000 N.

[0155]

[0179] The anchoring member preferably comprises an absorbable polymer, more preferably an absorbable thermoplastic polymer, even more preferably a synthetic or biosynthetic absorbable thermoplastic polymer. In embodiments, the anchoring member comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone. In a preferred embodiment, the anchoring member is fully absorbable. In a particularly preferred embodiment, the anchoring member is temporary.

[0156]

[0180] In an embodiment, the anchoring member is porous.

[0157]

[0181] The anchoring member preferably comprises a woven fabric. Woven fabrics include mesh, braid, woven mesh, and knitted mesh. These woven fabrics preferably comprise monofilament fibers, more preferably absorbable monofilament fibers. In a particularly preferred embodiment, the absorbable monofilament fibers are polymeric and oriented. Orientation, in this embodiment, means that the fibers are stretched to increase the molecular alignment of the polymer chains in the fibers. In an embodiment, the monofilament fibers have an average diameter of 0.02 to 0.7 mm, more preferably 0.05 to 0.25 mm, and even more preferably 0.07 to 0.175 mm. In an embodiment, the anchoring member has the following properties: (i) a suture pull-out strength of at least 1 kgf; (ii) a burst strength of 0.1 to 100 kgf; (iii) a thickness of 0.05 to 5 mm; and (iv) a thickness of 5 to 800 g / m. 2 and (v) a pore diameter of 5 μm to 10 mm. In a preferred embodiment, the anchoring member of the implant comprises a woven fabric having one or more of the following properties: (i) a suture pull-out strength of 1 kgf to 20 kgf, (ii) a burst strength of 1 to 50 kg or 10 to 50 kg, (iii) a thickness of 0.1 to 1 mm, and (iv) a pore diameter of 100 to 300 g / m 2 and (v) a pore diameter of 100 μm to 1 mm.

[0158]

[0182] In embodiments, the anchoring member comprises one or more of the polymers listed in Section A. These polymers can be used to prepare the woven structure of the anchoring member. Preferably, the anchoring member comprises one or more of poly-4-hydroxybutyric acid or copolymers thereof, or poly(butylene succinate) or copolymers thereof. In embodiments, the anchoring member comprises a mesh prepared from one or more of fibers comprising poly-4-hydroxybutyric acid or copolymers thereof, fibers comprising poly(butylene succinate) or copolymers thereof, or fibers comprising polydioxanone.

[0159]

[0183] In embodiments, the anchoring member comprises one or more bioactive agents. The bioactive agents may be coated onto or incorporated into the anchoring member. Particularly suitable bioactive agents include antimicrobial agents, antibiotics, proteins, and agents that promote tissue ingrowth. In embodiments, the anchoring member comprises one or more of cells, stem cells, gels, hydrogels, adipose tissue, autologous fat, lipoaspirate, adipocytes, and fibroblasts. These cells and substances may be coated onto or incorporated into the anchoring member.

[0160]

[0184] In an embodiment, the anchoring member has a ladder shape. In one embodiment, the hanging member comprises a ladder-shaped anchoring member. FIG. 3 is an example of a hanging member 20 comprising a ladder-shaped anchoring member 24 connected to the second end 23 of the support wire 21. Preferably, the ladder-shaped anchoring member is knitted from fibers, more preferably from monofilament fibers. In an embodiment, the ladder-shaped anchoring member is knitted using a combination of double-sided chain stitch to create the vertical members (i.e., sides of the ladder) and weft-inserted inlay to create the horizontal members (i.e., steps) of the ladder. The chain stitch and inlay may be formed from fibers of the same average diameter or from fibers of different average diameters. In one embodiment, the anchoring member comprises a ladder-shaped knitted structure, and the vertical members of the ladder are formed from monofilament fibers having a smaller diameter than the monofilament fibers used to form the horizontal members of the ladder. In one embodiment, the vertical members of the ladder are formed of monofilament fibers having an average diameter of 0.02-0.3 mm, more preferably 0.07-0.1 mm, and the horizontal members of the ladder are formed of monofilament fibers having an average diameter of 0.05-0.35 mm, more preferably 0.1-0.15 mm. In one embodiment, the woven ladder structure has a length of 10-20 cm and a width of 5-12 mm. Preferably, the hanging members including the ladder-shaped anchoring members are fully absorbable, and more preferably, the ladder-shaped anchoring members are made from poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0161]

[0185] In embodiments, the anchoring member comprises a retainer that can engage breast tissue. In embodiments, the retainer is designed to be inserted into a ladder weave to form the anchoring member. The ladder weave may be formed as described herein. FIG. 4 is an example of a suspension member 30 comprising a ladder weave having three retainers 33 inserted into the ladder structure to form an anchoring member 32. The anchoring members are connected to the second end of the support wire 31. As shown in FIG. 4, the tips of the retainers are angled away from the plane of the anchoring member (i.e., away from the plane of the ladder structure) and all point in the same direction, i.e., toward the support wire 31. The retainers are angled to engage tissue when a lifting force is applied to the suspension member in an inferior-to-superior direction.

[0162]

[0186] In one embodiment, the retainers have a base and a tip. Detail A in Figure 5 is a close-up of area A of the suspension member 40 having an anchoring member 44 with three retainers 47, showing the retainers 50, the anchoring member ladder structure 51, the retainer base 52, the retainer tip 53, and the retainers secured 54 to the intersecting ladder structure 51. In an embodiment, the base 52 of the retainer 50 is connected to the plane of the anchoring member, and the retainer tip 53 extends away from the plane of the anchoring member. In an embodiment, the retainers are connected to the plane of the anchoring member at an angle to position the tip of the retainer to engage and lift breast tissue. In embodiments, the retainer is positioned at an angle relative to the plane of the anchoring member, such that the angle between (i) the first end of the anchoring member and the apex of that angle and (ii) the tip of the retainer and the apex of that angle is less than 90 degrees but greater than 0 degrees. In embodiments, the tip of the retainer is positioned to point superiorly after implantation of the suspension member. In embodiments, the base of the retainer is positioned inferior to the tip of the retainer after implantation.

[0163]

[0187] In an embodiment, the retainer includes a groove that is used to secure the retainer to the ladder structure of the anchoring member. Figure 6 shows an example of a retainer 80, showing the base 81 of the retainer, the tip 82, and the groove 83 for securing the retainer to the ladder structure of the anchoring member. Detail A of Figure 5 shows the retainer with the groove secured to the ladder structure of the anchoring member.

[0164]

[0188] In embodiments, the retainer has a planar configuration, and such a retainer 80 is shown in FIG. 6. In other embodiments, the retainer has a non-planar configuration. An example of a retainer having a non-planar configuration is shown in FIG. 7. In this example, retainer 90 has angled tines 93 extending from a planar base 91. The base includes grooves 94 for securing base 91 to the ladder-like structure (as shown in DETAIL A of FIG. 5). Retainer 90 is secured to the ladder-like structure such that tips 92 of the retainer are angled to point toward the support wire and can engage breast tissue when the suspension member is lifted in an inferior-to-superior direction.

[0165]

[0189] In embodiments, the anchoring member includes a retainer extending from the plane of the anchoring member to the tip of the retainer by 0.1 to 25 mm, more preferably 1 to 15 mm, and even more preferably 3 to 10 mm. The retainer is designed to engage tissue and to lift the tissue when a force is applied to the anchoring member in an inferior-superior direction. Examples of suitable retainers that may be incorporated into the anchoring member include anchors, swivel anchors, hooks, darts, barbs, hooks, protrusions, extensions, bulges, ridges, spurs, bumps, points, cogs, surface roughness, surface irregularities, and arrows. Preferably, the retainer has a sharp tip capable of engaging breast tissue.

[0166]

[0190] In embodiments, the anchoring member includes multiple retainers for engaging breast tissue. In embodiments, the anchoring member includes one, two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, four, fifteen, six, seven, eight, nine, twenty, or more retainers. Multiple retainers allow the anchoring member to distribute the load of the lifted breast over a wider area. Distributing the load of the lifted breast over a wider area of ​​breast tissue by the retainers provides a more reliable method of lifting the breast tissue, prevents high tension in separate areas of the breast tissue, and helps maintain lift and prevent subsequent sagging. The use of multiple retainers is particularly desirable for lifting fatty or less dense breast tissue. These tissues are typically difficult to lift using, for example, sutures or other devices that anchor to a single point within the breast. This is because the application of tension at a localized point can result in tissue tearing and device penetration.

[0167]

[0191] In an embodiment, the anchoring member comprises a fabric, and the base of the retainer is connected to the fabric. In an embodiment, the base of the anchoring member retainer is secured to an absorbable monofilament fabric, more preferably a braided, knitted, or woven absorbable monofilament fabric. In a particularly preferred embodiment, the planar surface of the anchoring member has the following properties: (i) a suture pull-out strength of at least 1 kgf; (ii) a burst strength of 0.1 to 100 kg; (iii) a thickness of 0.05 to 5 mm; and (iv) a suture strength of 5 to 800 g / m. 2 and (v) a pore diameter of 5 μm to 10 mm; and one, two, three, or more retainers inserted into the woven fabric selected from the group comprising anchors, swivel anchors, hooks, darts, barbs, hooks, protrusions, extensions, bulges, ridges, spurs, bumps, points, cogs, surface roughness, surface irregularities, and arrows.

[0168]

[0192] In embodiments, the retainer comprises an absorbable polymer. In embodiments, the retainer comprises one or more of the polymers listed in Section A. Preferably, the retainer comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone. In embodiments, the planar surface of the anchoring member comprises a woven structure, the anchoring member comprises a retainer, and both the woven structure and the retainer comprise the same polymer, preferably poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0169]

[0193] Introducer housing tip

[0194] In embodiments, the suspension member further comprises an introducer housing tip. The introducer housing tip is preferably connected to the second end of the anchoring member. The introducer housing tip is designed to be used with an introducer tool and is designed to receive the distal end of the introducer tool. Insertion of the distal end of the introducer tool into the introducer housing tip provides a means for the surgeon to deliver the suspension member into the breast. After delivery of the suspension member to the implant site, the tool is detached from the introducer housing tip and removed from the breast, leaving the suspension member implanted in the desired location. In embodiments, the introducer housing tip has a blunt drive tip designed for blunt dissection of breast tissue. Insertion of the distal end of the introducer tool into the introducer housing tip in this embodiment allows the surgeon to create a defined channel in the breast for insertion of the suspension member by pushing the introducer housing tip with the introducer tool through the breast tissue with sufficient penetration force to penetrate the breast tissue. After the defined channel in the breast is formed, the introducer tool can be withdrawn from the breast, leaving the suspension member implanted in the defined channel with the introducer housing tip attached.

[0170]

[0195] The introducer housing tip is designed to allow for insertion of the distal tip of the introducer tool into the introducer housing tip and subsequent removal of the distal tip from the introducer housing tip once the suspension member has been delivered to the desired location within the breast.

[0171]

[0196] In embodiments, the introducer housing tip is sized to allow passage of the tip through a stab incision, hi embodiments, the introducer housing tip is sized to pass through a channel created in the breast by blunt dissection for insertion of the suspension member.

[0172]

[0197] In one preferred embodiment, the introducer housing tip is designed to allow blunt dissection of breast tissue to create a defined channel in the breast for the suspension member. Preferably, the introducer housing tip has a conical shape 48 as shown in Figure 5. Preferably, the introducer housing tip has a blunt driving tip 62 for blunt dissection of breast tissue.

[0173]

[0198] The introducer housing tip is sized to accommodate the distal tip of the introducer tool for delivery of the suspension member to the implant site.

[0174]

[0199] In one preferred embodiment, the suspension member comprises a ladder-shaped tether member having a first end and a second end, the first end of which is connected to the second end of the support line and the second end of which is connected to the tip of the introducer housing.

[0175]

[0200] An example of an introducer housing tip connected to the second end of an anchoring member is shown in FIG. 5. In this example, introducer housing tip 48 is connected at its second end 46 to anchoring member 44. The anchoring member includes a ladder-like structure and three retainers 47, and the anchoring member is connected at its first end 45 to second end 43 of support wire 41. Detail B in FIG. 5 is an enlargement of region B of suspension member 40, showing the location 60 within introducer housing tip 61 for inserting the distal end of an introducer tool and the cone-shaped tip 62 used to guide the suspension member into the patient's breast. Introducer housing tip 61 preferably has a tapered shape with a blunt tip 62 for blunt dissection of breast tissue, as shown in Detail B in FIG. 5.

[0176]

[0201] In an embodiment, the introducer housing tip 61 has an internal bore at location 60 for insertion of an introducer tool. The internal bore is sized to accommodate the distal tip of the introducer tool. Preferably, the diameter of the internal bore is 1-4 mm, more preferably 2 mm, and the length of the internal bore is preferably 0.5-2 cm, more preferably 1 cm. In an embodiment, the introducer housing tip has a maximum outer diameter of 2-10 mm, more preferably 3-8 mm, and even more preferably 4-6 mm. In an embodiment, the length of the introducer housing tip is 10-30 mm, more preferably 15 mm. In an embodiment, the introducer housing tip has a conical shape 61, tapering to a blunt, rounded tip 62.

[0177]

[0202] Figure 8 shows how an introducer tool 100 with a straight needle 101 is inserted into an introducer housing tip 102. The introducer housing tip 102 is connected to an anchoring member 103 of a hanging member 104. Detail D in Figure 8 is an enlargement of area D, showing the distal end (105) of the introducer tool tip inserted into the introducer housing tip 102 and the connection 106 of the introducer housing tip 102 to the ladder-like structure 107 of the anchoring member 103.

[0178]

[0203] In embodiments, the introducer housing tip is 3D printed or molded. Preferably, the introducer housing tip is injection molded.

[0179]

[0204] In embodiments, the introducer housing tip is connected to the second end of the anchoring member by fusing the tip and anchoring member together. In embodiments, the introducer housing tip is connected to the second end of the anchoring member by ultrasonic welding. Figure 5 shows an introducer housing tip ultrasonically welded to a ladder-shaped anchoring member.

[0180]

[0205] In embodiments, the introducer housing tip is absorbable. Preferably, the introducer housing tip is resorbed after implantation. In embodiments, the introducer housing tip is formed from an absorbable polymer. In embodiments, the introducer housing tip comprises a polymer listed in Section A. Preferably, the introducer housing tip comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone. In embodiments, the support wire, anchoring member, retainer, and introducer housing tip comprise the same absorbable polymer, more preferably poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0181]

[0206] Strut

[0207] In an embodiment, struts are used in conjunction with suspension members to suspend the breast. 1 indicates the implantation location of two suspension members 3 and 4 in a patient's breast and their connection to implanted strut 5 at connection point 6. Strut 5 is implanted superior to the patient's NAC. After tensioning suspension members 3 and 4 to suspend the breast, support wires of the suspension members are connected to strut 5 to maintain tension and the elevated position of the breast.

[0182]

[0208] In an embodiment, a strut has two arms with a central element. FIG. 9 is a diagram of a suitable strut 110. The strut 110 has a first arm 111 having a first end 112 and a second end 113, a second arm 114 having a first end 115 and a second end 116, and an element 117 with a first end 118 and a second end 119, where the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element. Preferably, the element 117 is a plate or fabric. In an embodiment, the plate can be a film. Detail F shown in FIG. 9 is a close-up of region F of element 117, showing perforations 120 in the element to encourage tissue ingrowth into element 117. For example, perforations can be made in a film to form element 117. Detail F in FIG. 9 also shows tines 121 that can be incorporated into element 117. For example, tines may be formed on the surface of a film or injection-molded plate to form elements 117. The tines help anchor the strut in the patient's tissue and prevent migration of the strut after implantation. In embodiments, elements 117 comprise perforations and tines. In embodiments, strut 110 further comprises one or more needles. In embodiments, strut 110 comprises two needles, one attached to each of arms 111 and 114. FIG. 9 shows a first needle 122 connected to first end 112 of first arm 111 and a second needle 123 connected to first end 115 of second arm 114. The first and second needles 122 and 123 preferably have blunt ends.

[0183]

[0209] In embodiments, the arms 111 and 114 of the struts comprise fibers, either monofilament fibers or multifilament fibers, more preferably monofilament fibers. Even more preferably, the arms comprise absorbable monofilament fibers or oriented absorbable monofilament fibers. In embodiments, the average diameter of the fibers is between 0.02 mm and 0.5 mm, more preferably between 0.06 mm and 0.3 mm, and even more preferably between 0.1 mm and 0.2 mm. In embodiments, the arms comprise a polymer listed in Section A. Preferably, the arms comprise one or more of poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0184]

[0210] In embodiments, element 117 is a plate, injection-molded plate, or film, more preferably a perforated plate or film. In embodiments, the pores of the element have a diameter of at least 50 μm, more preferably at least 75 μm. In embodiments, the pores of the element have an average diameter of between 75 μm and 3 mm, more preferably between 250 μm and 1 mm. In embodiments, the element has tines protruding from its surface. In embodiments, the tines protrude from the surface of the element by 0.1 to 3 mm, more preferably 0.5 to 2 mm. In embodiments, the element can be rolled up into a small tube for delivery to the implant site and unfolded once delivered to the implant site.

[0185]

[0211] In an embodiment, element 117 is a fabric, preferably a knitted fabric, a braided fabric, or a woven fabric. In an embodiment, the fabric is porous, having an average pore size of at least 50 μm, more preferably at least 75 μm, and even more preferably between 75 μm and 3 mm, or between 250 μm and 1 mm. In an embodiment, the fabric is designed so that it can be rolled up into a small tube for delivery to the implant site and unfolded once delivered to the implant site.

[0186]

[0212] In embodiments, element 117 comprises a polymer listed in Section A. Preferably, element 117 comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone. In embodiments, the support wire, anchoring member, retainer, introducer housing tip, and struts comprise the same absorbable polymer, more preferably poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0187]

[0213] In an embodiment, arms 111 and 114 are connected to element 117 by fusion, welding, or tethering. In an embodiment, arms 111 and 114 and element 117 are knitted, woven, braided, molded, or 3D printed as a unitary structure.

[0188]

[0214] In an embodiment, a strut is formed by injection molding element 117 in the form of a plate and connecting the plate to arms 111 and 114 at their first and second ends by binding the arms to the plate. In an embodiment, the arms are manually bound to element 117 by tying. In an embodiment, the arms are 10-25 cm long, more preferably 20 cm long. In an embodiment, the arms have an average minimum diameter of 0.1 mm and an average maximum diameter of 0.3 mm. In an embodiment, arms 111 and 114 are formed from monofilament fibers. In an embodiment, the monofilament fibers have an average minimum diameter of 0.1 mm and an average maximum diameter of 0.3 mm, and a length of 10-25 cm. In an embodiment, element 117, e.g., an injection molded plate, is formed with dimensions of 2 cm x 5 cm x 0.5 mm (width x length x thickness). In an embodiment, the injection molded plate further includes (a) cone-shaped tines 121 (see FIG. 9, detail F) with a height extending 0.5 mm from the surface of the plate and a base diameter of 0.4 mm, and (b) holes 120 (see FIG. 9, detail F) with a diameter of 0.8 mm. In an embodiment, the density of the tines is 1 cm 2Five tines per cm, pore density 2 16 holes per arm. In an embodiment, the strut is formed with one needle attached to arm 111 or 114, or more preferably, one needle attached to each of arms 111 and 114. Preferably, the needles have blunt ends. In an embodiment, one arm is crimped to the needle, or both arms are crimped to the needle. FIG. 9 shows first ends 112 and 115 of each arm 111 and 114 crimped to needles 122 and 123, respectively. In an embodiment, the needles are straight. In an embodiment, the needle size is 10 gauge. In an embodiment, injection-molded element 117 and arms 111 and 114 made of monofilament fiber comprise a polymer listed in Section A. Preferably, injection-molded element 117 and monofilament fiber comprise one or more of poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0189]

[0215] In embodiments, the struts are formed by knitting or weaving. In embodiments, the struts comprise elements 117 in the form of a tissue-gripping fabric. In one embodiment, the fabric is a warp-knit mesh, preferably knitted from monofilament fibers. The monofilament fibers preferably have an average minimum diameter of 0.05 mm to 0.2 mm, more preferably 0.07 mm to 0.15 mm. In embodiments, the elements 117 are self-gripping meshes. Self-gripping meshes can be formed, for example, by knitting a spacer mesh on a 20-gauge double-needle-bed warp knitting machine using monofilament fibers and using a hot knife to cut the monofilaments connecting the front and back meshes of the spacer mesh. Cutting the monofilaments produces meshes with exposed monofilament ends. These constructs can be further cut to the desired dimensions (width and length) of the elements 117, resulting in a density of exposed monofilament ends (i.e., monofilament tines protruding from the mesh on one side) on one side of the mesh. The density of the monofilament ends is preferably 10 to 50 per square centimeter. Preferably, the monofilament ends protrude 0.5 to 5 mm, more preferably 1 to 3 mm, away from the main body of the mesh. In one embodiment, element 117 formed from a self-gripping mesh may be connected at its first and second ends to a monofilament fiber by constraining the fiber to the self-gripping mesh to form arms 111 and 114. In an embodiment, arms 111 and 114 formed from monofilament fiber have an average minimum diameter of 0.2 mm and an average maximum diameter of 0.25 mm. In an embodiment, arms 111 and 114 and element 117 may be woven as a unitary structure. In an embodiment, textile element 117 and monofilament fiber arms 111 and 114 comprise one or more of the polymers listed in Section A. Preferably, the woven element 117 and the monofilament fiber arms comprise one or more of poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0190]

[0216] Tensioner

[0217] In embodiments, the suspension member further comprises a tensioner. Examples of tensioners include a pulley system or a spool tensioner. In embodiments, the tensioner may be adjusted at the time of implantation, for example, to apply more tension to the support line or anchoring member to suspend the breast, or the tensioner may be adjusted after implantation. In embodiments, the tensioner may be adjusted using a small tool inserted through a small incision.

[0191]

[0218] In an embodiment, the tensioner is preferably incorporated into the support wire of the suspension member, more preferably into the first or second end of the support wire.

[0192]

[0219] In embodiments, the tensioner comprises an absorbent polymer. In embodiments, the tensioner comprises one or more of the polymers listed in Section A. Preferably, the tensioner comprises one or more of poly-4-hydroxybutyrate or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0193]

[0220] sheath

[0221] In embodiments, the suspension member is partially or fully inserted inside a removable sheath for delivery of the suspension member to the implant site. In embodiments, the anchoring member of the suspension member is inserted inside the removable sheath. All or part of the suspension member may be inserted inside the sheath to facilitate delivery of the suspension member to the implant site. In particular, the removable sheath may be used to prevent the anchoring member or fixation element from prematurely engaging breast tissue during implantation, especially before the suspension member is positioned at a desired location within the breast. In embodiments, the suspension member is partially or fully inserted inside the removable sheath, the sheath containing the suspension member is implanted within the breast, and the removable sheath is removed to deploy the suspension member within the breast.

[0194]

[0222] In embodiments, the removable sheath comprises a polymer. In embodiments, the sheath is formed from nylon, high density polyethylene, polytetrafluoroethylene, and low density polyethylene.

[0195]

[0223] Introducer Tools

[0224] In an embodiment, the suspension member includes an introducer housing tip and is designed to be implanted using an introducer tool that can be inserted into the introducer housing tip, for example, at location 60 of introducer housing tip 61 (see FIG. 5 , detail B). In an embodiment, introducer tool 100 includes a handle, a needle portion 101 extending from the handle, and a distal tip 105 (located at the end of the needle opposite the handle) designed to be inserted into the introducer housing tip at location 60. In an embodiment, the handle is made from medical-grade polypropylene. In an embodiment, the handle is 10-15 cm long, more preferably 12 cm long, and has a diameter of 2-3 cm, more preferably 2.5 cm. In an embodiment, the introducer tool has a universal handle design to allow for both left-handed and right-handed use. In an embodiment, the needle of the introducer tool is made from 316L stainless steel. In an embodiment, the needle is 20-30 cm long, more preferably 25 cm long. In an embodiment, the needle has a diameter of 3 mm near the handle, which reduces to a diameter of 2 mm at the distal end of the introducer tool (the end opposite the handle, e.g., at location 105), and more preferably to a diameter of 2 mm at a distance of 1 cm from the distal end of the tool. The reduced diameter at the end of the needle is designed to allow insertion of the needle tip into the introducer housing tip at location 60 and delivery of the suspension member to the implant site.

[0196]

[0225] In an embodiment, the introducer tool comprises a straight needle.In an embodiment, the introducer tool comprises a curved needle.

[0197]

[0226] Mastopexy System

[0227] In embodiments, a system for mastopexy is provided. The system may include an implant and one or more tools for implanting the implant. In a preferred embodiment, the system includes two suspension members, a strut, and an introducer tool. The suspension members, struts, and introducer tool may be prepared as described herein. The system may further include one or more of a puncture dissection tool and a blunt dissection tool. In embodiments, the system may include two suspension members, a strut, and two introducer tools, for example, as shown in FIG. 2.

[0198]

[0228] In an embodiment, a mastopexy system for immobilizing a patient's breast at a target position is provided, the mastopexy system including a first suspension member having a first support wire having a first end and a second end, a first anchoring member having a first end and a second end, the first support wire being connected at its second end to the first end of the first anchoring member, a second support wire having a first end and a second end, and a second anchoring member having a first end and a second end. and a second suspending member having a second support wire connected at its second end to the first end of the second suspending member, wherein one suspending member is located on the outside of the breast when implanted within the breast and the second suspending member is located on the inside of the breast when implanted within the breast, such that the support wire of the suspending member is located superior to the anchoring member and the first end of the support wire is located above the nipple-areola complex (NAC). The mastopexy system may further include one or more of a puncture dissection tool, a blunt dissection tool, and an introducer tool. The mastopexy system preferably further includes an introducer housing tip located at the second end of the anchoring member of each suspending member, the introducer housing tip being designed to connect to the introducer tool. An introducer tool can be inserted into these introducer housing tips, and the assembly of the introducer tool and introducer housing tip can be used to create a defined channel through breast tissue for the suspension member by blunt dissection. After forming the defined channel in the breast, the introducer tool is removed from the breast, leaving the suspension member implanted in the breast still connected to the introducer housing tip. Alternatively, an introducer tool can be inserted into the introducer housing tip and used to insert the suspension member into a channel already created in the breast by the blunt dissection tool. To facilitate delivery of the suspension member to an implant site within the breast, the mastopexy system can further include a suspension member partially or completely covered by a removable sheath. The sheath is removed after the suspension member is implanted in the breast at the desired location.The sheath prevents the anchoring member from prematurely engaging tissue. The mastopexy system may further include a strut that can be implanted in the breast at a position superior to the NAC. The strut preferably includes a first arm having a first end and a second end, a second arm having a first end and a second end, and an element having a first end and a second end, wherein the second end of the first arm is connected to the first end of the element and the second end of the second arm is connected to the second end of the element. The arms of the strut are preferably formed from monofilament fibers, multifilament fibers, or braided fibers. The element is preferably a plate, such as a film, or a woven fabric. The element is preferably porous and preferably has self-gripping features on one surface. The holes and self-gripping features are designed to allow tissue ingrowth into the element and to secure the strut in place. The self-gripping features may be, for example, tines or short monofilament fibers. Preferably, the struts configured in this manner may be implanted within the breast at a location superior to the NAC, and the breast may be suspended by connecting a first arm of the strut to a first end of a support wire of a first suspension member and a second arm of the strut to a second end of a support wire of a second suspension member. In embodiments, the struts of the mastopexy system are inserted into a channel, preferably formed by blunt dissection, superior to the NAC. Preferably, the channel and the location of the implanted strut are along the medial-lateral plane superior to the NAC of the breast. If desired, the struts may be enclosed within a removable sheath to facilitate implantation, and the sheath may be removed once the struts are positioned at the desired location within the breast. After implantation of the suspension member and struts within the breast and removal of the sheath, tension may be applied to the support wire of the suspension member to suspend the breast, and the support wire may be connected to the arm of the strut to maintain the breast in the suspended position.

[0199]

[0229] An exemplary system for mastopexy consisting of a ladder-shaped braided anchoring member equipped with a retainer and connected at a first end to a support wire made of monofilament fiber having an average minimum diameter of 0.2 mm and an average maximum diameter of 0.25 mm, and connected at a second end to an introducer housing tip by fusion splicing, can be prepared as follows: The ladder-shaped structure of the anchoring member is prepared using monofilament fiber with a width of 8 mm and a length of 14 cm. The ladder-shaped anchoring member is warp knit using a combination of double-sided chain stitch and monofilament fiber having a minimum average diameter of 0.07 mm and an average maximum diameter of 0.1 mm to create the vertical rungs of the ladder, and a weft-insertion stitch made of monofilament fiber having a minimum average diameter of 0.1 mm and an average maximum diameter of 0.15 mm to create the horizontal members (i.e., ladder steps). Three injection-molded retainers were manually inserted into the horizontal members of the woven ladder-like anchoring element using a crisscross pattern (see Detail A in Figure 5 ), spaced 3 cm apart from each other on the ladder structure of the anchoring element. The retainers were molded with dimensions of 4 mm x 25 mm x 2 mm (width x length x thickness). The retainers were shaped to have a base (see 81 in Figure 6 ) and five 1 mm diameter circular grooves (see 83 in Figure 6 ) spaced 4 mm apart on both sides of the retainer to secure the retainers to the ladder-like anchoring element (as shown in Detail A in Figure 5 ). Each retainer was formed with a 30-degree angled tip (see feature 82 in Figure 6 ). A support wire made from monofilament fiber was formed to a length of 20 cm and connected to the first end of the ladder-like anchoring element by a tie. The second end of the ladder-like anchoring member is ultrasonically welded to the injection molded introducer housing tip. The introducer housing tip (see 61 in Detail B of FIG. 5) is formed with a conical shape with a maximum outer diameter of 5 mm at the base, a length of 15 mm, an internal bore having a diameter of 2.1 mm and a length of 12.5 mm at location 60, and a tapered section with a 20 degree angle terminating in a blunt rounded tip 62. The exemplary mastopexy system further comprises struts.The struts are formed by injection molding a plate with conical tines and perforations (as shown in Detail F of FIG. 9 ) and binding monofilament fiber to both ends of the plate 117 to form arms 111 and 114, or by knitting strut elements 117 from monofilament fiber and attaching monofilament fiber arms to both ends of element 117. The retainer-mounted anchoring member, monofilament support wire, introducer housing tip, strut elements, and arms may be formed from one or more of the polymers listed in Section A. More preferably, these components are formed from poly-4-hydroxybutyric acid or copolymers thereof, poly(butylene succinate) or copolymers thereof, or polydioxanone.

[0200]

[0230] In embodiments, the system for mastopexy is designed to be delivered minimally invasively. The implant has a design and properties that allow it to be delivered through a small incision. In embodiments, the implant is designed to be rolled or folded to allow delivery through a small incision. This minimally invasive approach can reduce patient morbidity, scarring, and the likelihood of infection. In embodiments, the implant has shape memory properties that allow it to self-restore its original shape after delivery to the implant site. For example, the implant may be temporarily deformed by rolling it up into a small-diameter cylindrical shape for delivery to the implant site, and then be able to self-restore its original shape in vivo.

[0201]

[0231] How to implant a mastopexy implant

[0232] The implants and systems described herein are best suited for use in breast surgery, and more particularly, in mastopexy procedures.

[0202]

[0233] 10-13 illustrate a method of performing a breast lift using a mastopexy implant. FIG. 10 illustrates a patient's breast contour 130, a breast NAC 131, and an introducer tool 132 loaded with a first suspension member 133 (shown in more detail as implant 44 in FIG. 5) to be inserted into a first side of the patient's breast. The method preferably involves making a stab incision at location 134 shown in FIG. 10. The distal end of the introducer tool 132 is inserted into the introducer housing tip (shown in more detail in FIG. 8) of the first suspension member. The introducer housing tip has a blunt drive tip designed for blunt dissection of breast tissue. The introducer housing tip is inserted into the stab incision and advanced using the introducer tool to create a blunt dissection-defined channel in the side of the breast for the first suspension member by applying force to the introducer tool in the direction of the arrow shown in FIG. 10. In embodiments, this first channel has a relatively small diameter and is straight or linear in shape. The direction of the channel is from posterior to inferior, or vice versa, and is spaced outward from the NAC 151. In a sense, this is a one-dimensional channel compared to the large 2D planar dissection required for a sling-type implant that spans the entire lower pole of the breast.

[0203]

[0234] Once the first suspension member has been advanced to the desired location, the introducer tool 132 is removed from the breast, leaving the first suspension member implanted within the breast. FIG. 11 illustrates the implanted first suspension member 142 and the implantation of a second suspension member 144 on the opposite side of the breast through a stab incision site 146 using the same procedure used to insert the first suspension member. A second linear channel is created for the second suspension member. The second channel is shown spaced apart from the nipple. The first and second channels do not connect or overlap and are substantially parallel to one another in this embodiment. Each channel is shown as a separate, linear, narrow channel, spaced apart laterally or medially from the NAC 151.

[0204]

[0235] Once the second suspension member 144 has been advanced to the desired location with the introducer tool 143, the introducer tool 143 is removed from the breast, leaving the first and second suspension members implanted within the breast. The method shown in Figures 10 and 11 may further include inserting the suspension member partially or completely enclosed within a sheath and removing the sheath after implantation of the suspension member.

[0205]

[0236] In contrast to some of the prior art sling-type devices described above, which extend from one side of the breast to the other at the lower pole, the second end of each of the suspension members is deployed within the tissue next to the NAC151 and is free or not connected to an additional member after deployment.

[0206]

[0237] 10 and 11, the introducer tools 132 and 143 may have curved needles instead of straight needles and may be used to create a curved channel in the breast spaced laterally or medially from the NAC 131 or 141. In this alternative method, the suspension member is implanted within the curved channel.

[0207]

[0238] FIG. 12 illustrates a method of inserting a strut 155 (shown in more detail as 110 in FIG. 9 ) into a patient's breast. The strut 155 may be inserted through one of the stab incisions (e.g., 157) in the breast. In one embodiment, the strut is inserted into a defined channel already created between stab incision locations 156 and 157 in the breast by blunt dissection. Alternatively, the defined channel for the strut may be formed by blunt dissection at the same time the strut is implanted. In an embodiment, to insert the strut by blunt dissection, a needle with a blunt end attached to the arm of the strut, as shown in FIG. 9 , may be used. In an embodiment, an introducer tool may be used to create a channel for the strut by driving a needle attached to the arm of the strut through breast tissue above the NAC. FIG. 13 illustrates an implanted strut 165 located superior to the NAC 161 of the breast and an introducer tool 164 used to implant the strut. The struts are preferably inserted in a medial-to-lateral plane, as shown in FIG. 13. After implantation of the struts 165, the introducer 164 is withdrawn, leaving the suspension member and struts implanted in the breast, as shown in FIG. 1. The breast is lifted by applying tension to the support wires in an inferior-to-superior direction and connecting the support wires to the arms of the struts 165. (FIG. 1 shows the connection of the support wires to the strut arms at connection point 6 in more detail.) Any suitable method can be used to connect the support wires to the strut arms. In embodiments, the support wires are tied, stapled, or fused to the strut arms. In embodiments, excess support wire and strut arms may be trimmed after the support wires are connected to the strut arms. The needles attached to the strut arms are removed after implantation of the struts. In embodiments, tension is applied to the support wires and the support wires are connected to the strut arms while the patient is in an upright position.Although the method illustrated in Figures 10 through 13 shows the implantation of one suspension member on each side of the breast, if desired, additional suspension members may be inserted into the breasts to provide the desired lift.

[0208]

[0239] In one embodiment, a method of suspending a patient's breast includes the steps of: (i) introducing a first suspension member comprising a first support wire having a first end and a second end and a first anchoring member having a first end and a second end, the first support wire being connected at its second end outside the breast to the first end of the first anchoring member; and (ii) introducing a second suspension member comprising a second support wire having a first end and a second end and a second anchoring member having a first end and a second end. The method includes (iii) connecting the first end of the first support wire to the first end of the second support wire at a location superior to the NAC of the breast, anchoring the first end of the first support wire and the first end of the second support wire to postural tissue at one or more locations superior to the NAC of the breast, or introducing struts superior to the NAC of the breast and connecting the first ends of the first and second support wires to the struts. In embodiments, the anchoring member is configured with a retainer for engaging and suspending the tissue. In embodiments, the support wire is configured with a fixation element for engaging the tissue. In embodiments, the postural tissue is selected from one or more of muscle, pectoral muscle, intercostal tissue, fascia, bone, rib, clavicle, ligament, tendon, and skin. In embodiments, the method involves inserting the suspension member into the breast in a superior-to-inferior direction. In embodiments, the method involves inserting a suspension member into the breast in an inferior-to-superior direction. In embodiments, the anchoring member further comprises an introducer housing tip at a second end of the anchoring member. In embodiments, the method comprises inserting an introducer tool into the introducer housing tip connected to the anchoring member and implanting the suspension member into the breast using the introducer tool. In embodiments, the introducer housing tip has a blunt drive tip and is used to form a defined channel in the breast for implantation of the suspension member.In embodiments, defined channels are formed within the breast by using an introducer tool to push an introducer housing tip with a blunt drive tip through breast tissue with sufficient penetration force to penetrate the breast tissue. After each channel is formed, the introducer tool is removed from the breast, leaving the suspension member implanted within the breast and connected to the introducer housing tip. In embodiments, the introducer housing tip has a conical shape with a blunt drive tip to facilitate the formation of defined channels within the breast. In an embodiment, the strut comprises a first arm having a first end and a second end, a second arm having a first end and a second end, and a fabric or plate having a first end and a second end, the second end of the first arm being connected to the first end of the fabric or plate and the second end of the second arm being connected to the second end of the fabric or plate, and the method of lifting a breast comprises, after implantation of the strut and suspension member into the breast, connecting a first end of a first support wire to the first arm of the strut and connecting a first end of a second support wire to the second arm of the strut. In embodiments, the method further comprises one or more of the following steps: (a) making one or more stab incisions in the breast; (b) inserting an introducer housing tip connected to a suspension member, or a blunt dissection tool, into the stab incision; (c) creating straight or curved channels inside and outside the breast by blunt dissection for insertion of the suspension member; (d) inserting the suspension member with the introducer tool and implanting the suspension member within the breast; (e) inserting the suspension member into the breast, where the suspension member is partially or completely covered by a sheath, and removing the sheath from the breast after insertion of the suspension member into the breast; (f) optionally, after having the patient seated in an upright position, applying tension in an inferior-to-superior direction to one or more of the suspension members to suspend the breast; (g) connecting the support wires to each other and then trimming the support wires; and (h) creating straight or curved channels by blunt dissection superior to the NAC of the breast for insertion of the struts.

[0209]

[0240] In one embodiment, a method of lifting a breast includes providing a stab incision tool, an introducer tool, a suspension member comprising a support wire having a first end and a second end, and an anchoring member having a first end and a second end, the support wire connected at its second end to the first end of the anchoring member, and an introducer housing tip having a blunt dissection tip connected to the second end of the anchoring member; making a stab incision in the breast; connecting the introducer tool to the introducer housing tip; and and inserting a tip of an introducer housing into the stab incision, using an introducer tool to push the introducer housing tip through the breast tissue with sufficient penetration force to penetrate the breast tissue, delivering a suspension member connected to the introducer housing tip into the channel with a support wire of the suspension member superior to the anchoring member, applying force to the support wire to lift the breast, and securing the support wire superior to the NAC of the breast. In one embodiment, the method further comprises using a blunt dissection tool to form a channel above the NAC of the breast in a medial-lateral direction, inserting a strut into the channel, and connecting the support wire to the strut to secure the lifted breast in the lifted position.

[0210]

[0241] Modifications and variations of the methods and compositions are apparent from the foregoing detailed description and are intended to fall within the scope of the appended claims.

Claims

1. a suspension member comprising a support line having a first end and a second end, and a tether member having a first end and a second end, the support line being connected at its second end to the first end of the tether member, and the tether member being connected at only one end to the support line; a strut configured to attach to the support wire; The anchoring member has a ladder-like weave. Mastopexy system.

2. The mastopexy system of claim 1 , wherein the anchoring member is porous.

3. further comprising at least one retainer; 3. The mastopexy system of claim 1 or 2, wherein the anchoring member is configured with the retainer to engage and suspend tissue.

4. 4. The mastopexy system of claim 3, wherein the retainer is selected from one or more of anchors, swivel anchors, hooks, darts, barbs, hooks, protrusions, extensions, bulges, ridges, spurs, bumps, points, cogs, surface roughness, surface irregularities, and arrows.

5. the retainer is positioned at an angle less than 90 degrees relative to the anchoring member; 5. The mastopexy system of claim 3 or 4, wherein the angle is measured between (i) the first end of the anchoring member and the apex of the angle, and (ii) the tip of the retainer and the apex of the angle.

6. 10. The mastopexy system of claim 1, wherein the support wire is configured with fixation elements for securing the support wire to soft tissue.

7. 7. The mastopexy system of claim 6, wherein the fixation elements are selected from one or more of a braid, a warp knit, and a warp knit with a chain knit.

8. the second end of the anchoring member is connected to an introducer housing tip having a blunt drive tip; The mastopexy system of claim 1 , wherein the introducer housing tip is designed to be removably connected to a distal tip of an introducer tool.

9. 10. The mastopexy system of claim 1, wherein the suspension member is capable of withstanding a load of at least 5N.

10. 10. The mastopexy system of claim 1, wherein the anchoring member is capable of withstanding a burst force of at least 1N.

11. the mastopexy system comprises one or more absorbable polymers; or 10. The mastopexy system of claim 1, wherein the mastopexy system comprises one or more absorbable polymers selected from polymers, homopolymers, and copolymers comprising glycolic acid, lactic acid, 1,4-dioxanone, trimethylene carbonate, 3-hydroxybutyric acid, 4-hydroxybutyric acid, ε-caprolactone, 1,4-butanediol, and succinic acid.

12. The mastopexy system of claim 1 , wherein the suspension member is partially or completely inserted into a removable sheath.

13. The mastopexy system of claim 1 further comprising one or more tools.

14. 14. The mastopexy system of claim 13, wherein the one or more tools are selected from one or more of a puncture dissection tool, a blunt dissection tool, and an introducer tool.

15. the puncture incision tool is adapted to make a puncture incision in the breast; the blunt dissection or introducer tool is adapted to create a defined channel through the breast beginning at the stab incision for insertion of the suspension member or strut; the introducer tool is adapted to insert the suspension member or the strut into the breast; 15. The mastopexy system of claim 14, wherein the suspension member is adapted to suspend the breast.

16. Equipped with an introducer tool, the introducer tool is connected to the hanging member; the introducer tool facilitates placement of the suspension member through an incision into the breast; The mastopexy system of claim 13 , wherein the suspension member suspends the breast.

17. the strut comprises a first arm, a second arm, and a fabric or plate connected to the first arm and the second arm; 17. The mastopexy system of claim 1, wherein the first arm is configured to attach to the support wire.

18. 1. A mastopexy system for immobilizing a patient's breast in a target position, comprising: the breast having a nipple-areola complex (NAC), an IMF, a lateral aspect, and a medial aspect; The mastopexy system comprises: a first suspension member comprising: a first support line having a first end and a second end; and a first anchoring member having a first end and a second end, the first support line being connected at its second end to the first end of the first anchoring member; a second suspension member comprising: a second support line having a first end and a second end; and a second anchor member having a first end and a second end, the second support line connected at its second end to the first end of the second anchor member; a strut configured to connect to the first suspension member and the second suspension member; one suspension member is located on the outer side of the breast when implanted within the breast, and the second suspension member is located on the inner side of the breast when implanted within the breast, such that the support line of the suspension member is located superior to the anchoring member and the first end of the support line is located above the NAC; A mastopexy system, wherein the first and second anchoring members each comprise a ladder weave.

19. 20. The mastopexy system of claim 18, wherein the struts provide means for attachment of the struts to the support wires.

20. 20. The mastopexy system of claim 19, wherein the struts, when implanted in the breast, are positioned superior to the NAC of the breast.

21. the strut comprises a first arm having a first end and a second end, a second arm having a first end and a second end, and a fabric or plate having a first end and a second end; the second end of the first arm is connected to the first end of the fabric or plate; the second end of the second arm is connected to the second end of the fabric or plate; 21. The mastopexy system of claim 19 or 20, wherein one of the first and second arms has a needle connected to the first end, or each of the first and second arms has a needle connected to the first end.

22. the first and second suspension members each further comprising an introducer housing tip; 20. The mastopexy system of claim 18, wherein the introducer housing tip is designed to connect to a distal tip of an introducer tool.

23. 23. The mastopexy system of claim 22, wherein the introducer housing tip comprises a blunt driving tip designed for blunt dissection of tissue.

24. 20. The mastopexy system of claim 18, wherein the first and second suspension members each include one or more retainers designed to engage tissue.

25. 20. The mastopexy system of claim 18, wherein the first and second suspension members are at least partially covered by a sheath.

26. 14. A method of making the mastopexy system of claim 1 or 13, comprising: The method, wherein the anchoring member is formed by weaving the ladder fabric and connecting the first end of the ladder fabric to the second end of the support wire.

27. 27. The method of claim 26, wherein the ladder weave is formed by weaving monofilament fibers.

28. the support wire is a monofilament fiber, 28. The method of claim 26 or 27, wherein the monofilament fiber is connected to the anchoring member by tying, stapling, or welding.

29. the mastopexy system further comprises one or more tissue retainers; the tissue retainer having a base and a tip; 30. The method of claim 28, wherein the base of the tissue retainer is inserted into the ladder weave.

30. The second end of the anchoring member is connected to a distal end of an introducer housing, 30. The method of any one of claims 26 to 29, wherein the introducer housing tip is conically shaped with a blunt tip at the apex of the cone and a bore at the base of the introducer housing tip for inserting the distal tip of an introducer tool.

31. 27. The method of claim 26, wherein the support wire is formed with fixation elements capable of engaging tissue.

32. 32. The method of claim 30 or 31, wherein the support wire is formed by knitting the fabric in a single or double loop chain stitch.

33. 20. A method of making the strut of claim 15 or 19, comprising the steps of: the strut comprises a first arm having a first end and a second end, a second arm having a first end and a second end, and a fabric or plate having a first end and a second end; the second end of the first arm is connected to the first end of the fabric or plate; the second end of the second arm is connected to the second end of the fabric or plate; The fabric is knitted from monofilament fibers; the plate is injection molded; The method wherein the first and second arms are formed from monofilament fibers and are constrained, stapled, or fused to the fabric or plate.

34. 34. The method of claim 33, wherein the plate is perforated or injection molded and perforated.

35. 34. The method of claim 33, wherein the plate is injection molded with tines protruding from at least one side of the plate.

36. a needle attached to the first end of the first arm of the strut; or 34. The method of claim 33, wherein the first ends of the first and second arms of the strut have needles attached thereto.

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