98 results about "Prosthetic material" patented technology

The present invention relates to a tubular suture reinforcement material suitable for use in automatic suturing devices that are widely used in surgical operations, etc. More specifically, the present invention relates to a tubular suture reinforcement material with which a tubular shape is easily obtained to thereby increase its productivity, and removal of thread is easily achieved. The present invention aims to overcome drawbacks such that sheet-like materials joined by the conventional temporary adhesion easily separate from each other, and the tubular suture reinforcement material manufactured using a running stitch requires a lot of time and skill, and removal of the thread is difficult depending on the kind of sheet-like material, sewing pitch, etc. More specifically, the present invention relates to a tubular suture reinforcement material for an automatic suturing device, wherein both ends of one or two sheet-like materials are sewed using a chain stitch (intralooping stitch) with a single thread to form a tubular shape, and one or two thread ends at one or two sewing ends are suitably extended.

A tissue fastening device is provided. The tissue fastening device may include an elongate member having fastener guides extending between a working end and a control end and a firing aperture disposed on the working end, an arcuate needle disposed within the firing aperture of the working end and rotatable between a retracted position and an extended position, the arcuate needle including an antegrade recess configured to engagably receive an end of a fastener during advancement of the arcuate needle, and a drive mechanism operatively coupled to the arcuate needle and configured to, upon actuation, advance the arcuate needle in a forward rotation to engage the end of the fastener to be installed and push the end of the fastener through one of a tissue and a prosthetic material into a helical configuration.

Systems, devices and methods are provided for augmenting intervertebral discs. The systems include implantable annulus repair and augmentation devices as well as implantable prosthetic materials for replacing a portion of or augmenting the annulus and / or the nucleus pulposus. The systems further include instruments for implanting the subject devices and materials in a minimally invasive manner. The methods are directed to the minimally invasive implantation of one or more of the subject annulus repair devices and the prosthetic materials concurrently.

An implantable prosthesis for use in positioning a breast implant comprising a sheet of a prosthetic material configured to form a sling-shaped receiving area for receiving and supporting the breast implant. The surface area of the implantable prosthesis contacting the breast implant comprises a biocompatible or chemically inert material to prevent abrasion of or reaction with the breast implant. The implantable prosthesis of the present invention can be used during corrective procedures to reposition and support a malpositioned breast implant or during reconstructive or cosmetic procedures at the time the implant is first positioned within the patient. The prosthesis is used with implants in the partial sub-muscular, completely sub-muscular, and sub-glandular position and is used to prevent medial, lateral and inferior displacement of the implant.

The device incorporates multiple implants for the attachment of prosthetic equipment, and is characterized by the fact that it incorporates multiple identical implants (1) positioned in alignment and connected to each other at their front (1a) and rear (1b), in a temporary manner, such that the said implants have a screw-form external configuration, and such that each implant has a longitudinal internal cavity (1c) of triangular cross-section extending fully from end to end, that constitutes the housing for a means of pre-positioning (3) configured to have a triangular imprint with a spiked-form end part (3a), such that the interconnection of the implants at the respective front and rear of two successive implants is a temporary connection, and such that the multiple implants constitute an assembled set intended to be inserted into a loader unit associated with the ancillary insertion device.

A process for producing a dental prosthesis wherein an impression is taken of the patient's mouth, a working model is created, a base plate is applied to the working model, an insulating film is applied to the base plate, a tooth arrangement in wax is formed on the base plate, a framework of the teeth is then formed with an investment compound, the wax is then boiled out and replaced with a curable material which is subsequently hardened.

A medical fastening device is provided. The fastening device may include a first arcuate needle adapted to rotate about a first axis in a first direction, entering through a first section of one of a tissue and a prosthetic material, and exiting through a second section of one of the tissue and the prosthetic material; a second arcuate needle adapted to rotate about a second axis in a second direction, entering through the second section of one of the tissue and the prosthetic material, and exiting through the first section of one of the tissue and the prosthetic material; and a drive mechanism operatively coupled to each of the first and second arcuate needles and configured to engage each of the first and second arcuate needles between a retracted position and an extended position.

Devices, systems and methods are provided for augmenting intervertebral discs. The systems include implantable annulus repair and augmentation devices as well as implantable prosthetic materials for replacing a portion of or augmenting the annulus and / or the nucleus pulposus. The systems further include instruments for implanting the subject devices and materials in a minimally invasive manner. The methods are directed to the minimally invasive implantation of one or more of the subject annulus repair devices and the prosthetic materials to within the intervertebral disc.

A stent for implantation in a blood vessel is disclosed, especially in the region of the aortic arch. The stent is comprising rings which are disposed successively in the stent's longitudinal direction and which are made up of meandering circumferential supports. The stent further comprises a prosthesis material which is fixed to the rings and which connects them, thereby forming a hollow cylindrical body with a jacket which is substantially closed on the circumference thereof. At least one connecting support is provided between the last ring and the penultimate ring at the proximal end of the stent and connects these two rings to one another.

A dental prosthetic device has a body with a soft tissue engagement region formed of porous metal and that defines pores for the ingrowth of soft tissue into the pores. In one form, the porous metal includes tantalum. The porous metal may be partially filled with a resorbable material. The body may have a coronal end portion with an esthetic material.

A biodegradable substrate usable as a prosthetic material (i.e., for tissue regeneration) facilitates the invasion of cells into a substrate and has a thick structure similar to woven fabrics. The biodegradable substrate is obtained by stitching a biodegradable nonwoven fabric with a biodegradable thread. An embodiment of the nonwoven fabric used is a material wherein first and second layers, each having filaments of a thread made of collagen located in parallel, are laminated and adhered to each other so that the alignment direction of the filaments of the thread in the first and second layer are arranged at a certain angle. This nonwoven fabric is stitched with a thread made of collagen. In another embodiment a filmy material having been treated with a biodegradable binder such as collagen or gelatin is piled on the nonwoven fabric and stitched.

A multilayer ingrowth matrix is constructed within well-defined porosity of a prosthetic material. The matrix consists of either proteinaceous or synthetic layers or gradients, or a combination of proteinaceous and synthetic layers or gradients. Each layer within the matrix is designed to achieve a specific function, such as facilitation of ingrowth of a particular cell type or release of a particular growth factor. The well-defined porosity is in the form of either helically oriented, interconnected transmural ingrowth channels, or a porous wall structure containing uniformly shaped pores (i.e. voids) in a very narrow size range, or a combination of channels and pores. This invention allows for uninterrupted ingrowth of connective tissue into walls of a synthetic graft prosthesis made from the prosthetic material. Furthermore, this invention can produce small diameter prostheses having an internal diameter of 6 mm or less.

Multi-membrane prosthetic nucleus and implants using same are disclosed having an outermost membrane that is semi-compliant and limits the innermost membrane and any intermediate membranes that are highly compliant from bulging out of any opening in the annulus fibrosus. The outermost membrane may help protect the innermost membrane from trauma including any trauma before the innermost membrane is expanded through the injection of prosthetic nucleus material and trauma during the expansion of the innermost membrane in response to the injection of prosthetic nucleus material. Also disclosed is a coated membrane which combines the mechanical properties of the foundation layer with the low permeability to the passage of the flowable prosthetic material of the coating. This coated membrane is semi-compliant and prevents the prosthetic nucleus from bulging out of any openings in the annulus fibrosus. Use is made of injected prosthetic nucleus material that changes to a non-flowable state.

The invention discloses a quaternary ammonium salt and carbamate structure containing antibacterial methyl acrylate monomer, its preparation method and an application thereof. The quaternary ammonium salt and carbamate structure containing antibacterial methyl acrylate monomer prepared in the invention can be used as an antibacterial ingredient in a dental prosthetic material. The monomer has quaternary ammonium salt and carbamate structure. Therefore, dental cured resin containing the monomer has a certain antibacterial property and toughness.

The invention provides a silk ligament and a preparation method thereof, and relates to the field of prosthetic materials. The silk ligament is prepared from natural silk serving as raw materials by stranding, twisting, degumming and bone morphogenetic protein (BMP) filling, and consists of lead wires (1), an inner core (2) and a core shell (3), wherein the lead wires (1), the inner core (2) and the core shell (3) are formed by weaving integrally; the core shell (3) is fixed on the middle part of the inner core (2); and the lead wires (1) are fixed at both ends of the inner core (2). Compared with the conventional artificial ligament, the mechanical property of the silk ligament are in stricter accordance with the properties of anterior cruciate ligaments (ACL) of human bodies, and after being filled with the BMP, the silk ligament rebuilding is more convenient.

The invention discloses a method for regenerating a dental prosthetic material and an acidic amino acid-induced demineralized dental enamel outer enamel prism thereof in situ, and belongs to the technical field of in-situ regeneration of dental enamel outer enamel prisms. The preparation method is as follows: firstly, carrying out surface calcium activation onto a dental enamel surface, i.e., grafting calcium ions; then, forming calcium carbonate stable calcium ions step by step; finally, taking calcium carbonate stable calcium ions as foundation forms to synthesize hydroxyapatite crystals. Amino acid participates in the whole process, concentration of the amino acid added in a two-step process is consistent. The hydroxyapatite crystals deposited on the surface of the demineralized dental enamel are orderly and compact in sequence, and uniform in crystal morphology, so that obvious continued growth tendency of an artificial layer can be seen. The preparation method disclosed by the invention lowers protein extracting cost and harsh restrictions on an application environment, and is wide in prospect. The material prepared by the method disclosed by the invention can be applied to cosmetic dental for filling demineralization gaps, also can be used for repairing early-stage enamel demineralization, and can be used as a combined material for bottom pulp capping pit and fissure sealing, and the like.

The present invention relates to methods for inhibiting stenosis, obstruction, or calcification of a valve following implantation of a valve prosthesis or a native valve which develops disease via the Lrp5 / Wnt Pathway in the presence of elevated lipids due to elevated Low Density Lipoprotein. This invention involves dispensing a combination of medications to target inflammation and attachment of the target cell and the secondary drugs to inhibit proliferation and calcification on an elastical stent, gortex graft or valve leaflet. The combination therapy inhibits bioprosthesis and native valve calcification with improvement of the longevity of the prosthetic material including the stent, the native valve, and the gortex covering. The valve prosthesis and or gortex graft is mounted on the elastical stent or prosthesis such that the elastical stent is connected to the valve.

A stent graft comprises a hollow cylindrical body and a sleeve catheter, wherein the body comprises at least a self-expanding stent and prosthetic material, wherein the body has a circumference in a compressed state which is smaller than a circumference of the body in an expanded state. The sleeve catheter is embodied as a flap-shaped compression element comprising two longitudinal edges, wherein a first longitudinal edge is attached to the body, wherein an extent of the flap-shaped compression element perpendicular to the first longitudinal edge is smaller than the circumference of the body in the expanded state, wherein, for compressing the body, the flap-shaped compression element can be placed around the body and a free second longitudinal edge is detachably fixable to fixation points arranged on the body and / or on the flap-shaped compression element.

A dental restorative composition comprising a polymerizable monomer having at least 3 partial chains which are polyester chains bonded to polymerizable groups in one molecule. The dental restorative composition having high mechanical properties, especially high tenacity and excellent impact resistance and fracture resistance as a resin prosthetic material such as a resin for dental crows and artificial teeth, a filler material such as a composite resin, or other resin-based dental material is provided.

The preparation process and use in repairing bone defect of calcined bone powder as one rack material to induce the regeneration of bone tissue is disclosed. The calcined bone powder has obvious bone healing promoting effect, relatively high biocompatibility, certain hardness and strength, easy shaping and rich material source, and thus facilitates the preparation of artificially synthetic material with required porosity, pore communication, pore size, etc.

The invention provides a fully ceramic dental prosthetic material, which is a dental prosthetic material prepared from micron-scale and submicron-scale Al2O3, nano-scale Al2O3, nano-scale ZrO2 and biological glass-ceramic serving as raw materials. The invention also provides a method for preparing the fully ceramic dental prosthetic material. In the aluminum oxide / zirconium oxide / glass-ceramic composite material prepared by the invention, the used glass-ceramic serves as a reinforcement phase in the composite structure; the mechanical property of the compound can be greatly improved, the bending strength reaches 601.30 to 657.2MPa and the fracture toughness reaches 6.19 to 6.22MPa.ml / 2, and the requirement of anterior and posterior dental crown and bridge restoration bodies can be met well; and the fully ceramic dental prosthetic material has high strength and toughness, can produce the optical effect similar to dentin, can be generally used for multi-unit bridges of anterior teeth and posterior teeth and has more attractive and realer color.

The present invention relates to a dental adhesive primer composition for use in dental fields employed to bond dental materials, such as restoration materials, dental crown materials, prosthetic materials, esthetic materials, orthodontic materials, preventive materials, core build-up materials and root canal materials, to ceramics, metals, resins, composite resins, glass ionomer cements, and hard biotissues (enamel or dentin of natural tooth). The present invention also relates to a dental adhesive primer composition including a dental adhesive composition which can be used not only in combination with another adhesive composition but also alone.

The invention discloses a dual-curing dental composite resin, and belongs to the technical field of dental prosthetic materials. The dental composite resin is packaged in two doses; the component 1 comprises an acrylics monomer, an inorganic filler and an oxidizing agent; the component 2 comprises an acrylics monomer, an inorganic filler and a reducing agent; a UV-curable initiator and a dye exist in the component 1 and / or the component 2. The traditional peroxide-tertiary amine system is replaced with a novel oxidation-reduction initiator system and a diacetyl acetone copper-thiourea system, so that anthochromia caused by the initiator after the resin is cured can be significantly weakened.

Disclosed are polymerizable dental materials containing silver particles having a primary particle diameter < 40 nm as an antimicrobial additive. The inventive dental materials are suitable as filling composites, basic prosthetic materials, adhesives, coating composites for crowns and bridges, and materials for artificial teeth, for example.

The invention discloses a dental prosthetic material and a preparation method thereof. The method comprises the following steps: (1) soaking tooth enamel, dentin or titanium sheets by using a phosphoric acid aqueous solution or a mixed aqueous solution of peroxide and phosphoric acid; and (2) adding an aqueous solution of phosphate ions and fluorine ions into an Agarose-Ca solution to obtain a mixed solution, and placing the tooth enamel, the dentin or the titanium sheets treated by the step (1) into the mixed solution and obtaining the material on the tooth enamel, the dentin or the titanium sheets after the reaction is finished, wherein the Agarose-Ca solution is the aqueous solution of the agarose and calcium nitrate. The structure of the dental prosthetic material prepared by the method is close to natural human tooth enamel, and has phosphorite hexagonal prism crystals and enamel crystal column microstructures. The dental prosthetic material disclosed by the invention is expected to replace the conventional dental prosthetic material to repair the enamel damage caused by dental caries or other dental diseases, and also can serve as a groove sealing material for preventing the dental caries.

The invention discloses a dental prosthetic material and a preparation method thereof. The method comprises the following steps of (1) immersing dentin in an EDTA aqueous solution; and (2) putting the dentin treated by the step (1) in a sodium hyaluronate-calcium nitrate hydrogel, adding a dihydrogen phosphate ion and fluoride ion aqueous solution after standing; and reacting to obtain the dental prosthetic material, wherein the sodium hyaluronate-calcium nitrate hydrogel is a mixture of sodium hyaluronate and calcium nitrate aqueous solutions. With the preparation method provided by the invention, a dense dental prosthetic material with a bionic structure analogous to human enamel is grown on the surface of the isolated human dentin directly under an environment similar to human physiological conditions (37 DEG C, atm, pH6.0) through a simple chemical method. The film dental prosthetic material has an extremely similar structure to that of natural human enamel and has apatite hexagonal prism crystals and enamel crystal column microstructures. Mechanical properties of the dental prosthetic material are between that of natural human enamel and that of the dentin.

A medical fastening device is provided. The fastening device may include a first arcuate needle adapted to rotate about a first axis in a first direction, entering through a first section of one of a tissue and a prosthetic material, and exiting through a second section of one of the tissue and the prosthetic material; a second arcuate needle adapted to rotate about a second axis in a second direction, entering through the second section of one of the tissue and the prosthetic material, and exiting through the first section of one of the tissue and the prosthetic material; and a drive mechanism operatively coupled to each of the first and second arcuate needles and configured to engage each of the first and second arcuate needles between a retracted position and an extended position.