43results about "Finger joints" patented technology

The present disclosure relates to a prosthesis (400) configured for implantation in a carpometacarpal joint in the wrist, the prosthesis comprising a first and a second implant part member (405a,b) configured to be screwed into a radius and metacarpal bone respectively. Each implant part member (405a,b) comprising an articulation member (420a,b) configured to be received in the bone fixation member (410a,b) in a releasable manner. The articulation members (420a,b) comprise orientation pins (423) configured to be inserted into bore sections of the bone fixation members 410a,b. When seated in the bore sections, the first portions of the articulation members (420a,b) with the orientation pins (423) are substantially centered along the central axes of the bone fixation members (410a,b), thereby forming common central axes extending through the bone fixation members (410a,b) and the articulation members (420a,b). The radius articulation member (420a) comprises a replacement articular surface configured for articulation with a replacement articular surface located on the metacarpal articulation member (420b). The radius replacement articular surface has (420a) a configuration that is asymmetric about the common central axis of the radius bone fixation (410a) and articulation members (420a). The bore sections have cross-section (419) extending perpendicularly to the central axis defining a first polygonal outline (429). The orientation pins (423) have cross-sections defining a second polygonal contour line, such that when the orientation pins (423) of the articulation members (420a,b) are seated in the bores of the bone fixation members (410a,b), rotation of the articulation members (420a,b) in relation to the bone fixation members (410a,b) is prevented.

An endoprostheses may include a bone anchor having a proximal end having an extension configured to be inserted into a residual portion of an amputated bone of a patient. The endoprostheses may also include a non-jointed endoprosthesis body configured to enclosed by soft tissue of the patient and having a proximal end configured to be coupled to a distal end of the bone anchor. The endoprostheses may also include a coupling configured to releasably engage the bone anchor and the non-jointed endoprosthesis body. The coupling may be configured to cooperate with the bone anchor and the non-jointed endoprosthesis body to maintain an axial and rotational arrangement of the non-jointed endoprosthesis body with respect to the bone anchor.

A method of securing bones for fusion includes positioning an implant guide sleeve on a first bone, a second bone, and across a separation between the first bone and the second bone, the method further includes using the implant guide sleeve to guide creation of a first implant hole in the first bone and to guide creation of a second implant hole in the second bone, aligning an inserter operably connected to the implant with the implant guide sleeve, and advancing the inserter relative to the implant guide sleeve to position the implant in contact with the first bone and the second bone, wherein the implant bridges the first bone and the second bone.

A method of modifying a bone surface for receiving an implant includes: positioning a contour guide at a first bone and a second bone and across a separation between the first bone and the second bone; using the contour guide to modify a surface region of at least one of the first bone and the second bone to form a modified surface region at one or both of the first bone and the second bone; and positioning an implant in contact at least with the modified surface region.

A system for deploying a fixation member into an aperture of a bone fastener includes a guide having a body that includes a proximal end and a distal end. The guide includes a guide member coupled to the body near the proximal end. The guide member is configured to guide placement of the fixation member to secure the bone fastener. The system includes an engagement member coupled to the body near the distal end. The engagement member is configured to engage the bone fastener such that the guide member is rotatable, relative to the bone fastener, about an engagement axis to the guide member at any of the plurality of relative orientations about the engagement axis.

The surgical implant assembly comprises first and second anchor bodies configured to engage with the respective metacarpal surfaces of the first and second metacarpal bones, a main suture having a suture length extending between the first and second ends of the main suture, and a secondary suture having a suture length extending between the first and second ends of the secondary suture, wherein the suture length of the main suture comprises a first suture portion passing through the first anchor body and an extension between the first and second suture portions of the main suture. The first suture includes a bridging portion of the main suture and a second suture portion that passes through the second anchor body, wherein the first suture portion is located between the bridging portion and the first end, the second suture portion is located between the bridging portion and the second end, the auxiliary suture includes an auxiliary suture portion that passes through the first anchor body, the auxiliary suture portion is located between the first end and the second end of the auxiliary suture, and no portion of the auxiliary suture passes through the second anchor body.

The present disclosure provides an implant, a corresponding method of implantation, and a method of using the same that can be used in orthopaedic joint replacement arthroplasty or hemiarthroplasty and / or an orthopaedic joint resurfacing arthroplasty or hemiarthroplasty. The implant can include a fin portion for receipt in a corresponding slot formed in bone, and the fin portion can support an articulation portion that can be used in resurfacing and replacing portions of articulation surfaces of a joint.

A surgical implant assembly includes a first anchor body and a second anchor body adapted to engage respective metacarpal bone surfaces of a first metacarpal bone and a second metacarpal bone; a main suture having a suture length extending between a first end section and a second end section of the main suture, the suture length of the main suture including a first suture section through the first anchor body and a second suture section through the second anchor body, a bridge section of the main suture extending between the first suture section and the second suture section of the main suture, a first suture segment is located between the bridge segment and the first end segment, and wherein a second suture segment is located between the bridge segment and the second end segment; a secondary suture having a suture length extending between a first end section and a second end section of the secondary suture, the secondary suture comprising a secondary suture section passing through the first anchor body, the secondary suture section being located between the first end section and the second end section of the secondary suture, and wherein any portion of the secondary suture does not pass through the second anchor body.

The invention relates to a prosthesis (1) for movably coupling os metacarpale I of a hand to a second metacarpal bone of the hand, which prosthesis comprises a first (2) and a second element (4), wherein the first element comprises a first attachment member (3), which first attachment member is configured for attachment to os metacarpale I, and the second element comprises a second attachment member (5), which second attachment member is configured for attachment to the second metacarpal bone, which first and second element are movable relative to each other, wherein the second metacarpal bone is os metacarpale II of the hand and the second attachment member is configured to be arranged from the radial side of os metacarpale II. The invention also relates to a combination of a prosthesis according to the invention and at least one fastening means (16, 17).

Systems, methods, and devices described herein relate an implant adapted to be placed in a bone in the metatarsophalangeal joint or a metacarpophalangeal joint. In some embodiments, the implant includes a head portion extending from a first surface to a second surface and having a plurality of layers located between the first surface and the second surface. In some embodiments, the first surface is lubricious. In some embodiments, the implant comprises a post portion extending from the second surface of the head portion to a bone facing surface.

A surgical implant assembly comprising: first and second anchor bodies adapted to engage respective metacarpal bone surfaces of first and second metacarpal bones, a primary suture having a suture length extending between first and second terminal segments of the primary suture, the suture length of the primary suture comprising a first suture segment that passes through the first anchor body and a second suture segment passing through the second anchor body with a bridging segment of the primary suture extending between the first and second suture segments of the primary suture wherein the first suture segment lies in between the bridging segment and the first terminal segment and wherein the second suture segment lies in between the bridging segment and the second terminal segment; a secondary suture having a suture length extending between first and second terminal segments of the secondary suture, the secondary suture comprising a secondary suture segment being passed through the first anchor body, the secondary suture segment being located between the first and second terminal segments of the secondary suture and wherein no portion of the secondary suture passes through the second anchor body.

A method of modifying a bone surface to receive an implant includes placing a contour guide on a first bone and a second bone across a separation between the first bone and the second bone, modifying the surface area of ​​at least one of the first bone and the second bone using the contour guide to form the modified surface area on one or both of the first bone and the second bone, and positioning an implant in contact with at least the modified surface area.

An apparatus and methods are provided for a dermal cap for resurfacing a metatarsal head of the foot or a metacarpal head of the hand. The dermal cap comprises an outer surface having a convex shape, an inner surface having a concave shape, and a rounded peripheral surface joining the inner surface and the outer surface. The inner surface can be placed onto a bone head such that the outer surface provides a bone head surface resembling the original articular cartilage. The outer surface effectively restores the articular cartilage and thus relieves pain and facilitates better joint function. The dermal cap can be formed by stretching it over a rounded mandrel shaped similarly to the size and anatomy of the bone head to be treated. The dermal cap can be freeze-dried on the rounded mandrel to set the desired anatomy of the dermal cap.

The invention relates to a resorptive intramedullary implant between two bones or two bone fragments. The implant includes a single-piece body (1) having a generally elongate shape and having, at each end, areas for anchoring to the bone portions in question, characterized in that one of said areas (A1) has a cylindrical cross-section while the other area (A2) has a flat cross-section.

An apparatus can include a metacarpal implant, a trapezium implant, and a spacer. The metacarpal implant can include a stem having a first end and a second end and centered on a first axis and an opening partially extending from the first end to the second end, a portion of the opening centered on the first axis. The trapezium implant can include an implant head portion having a top surface and a bottom surface, the implant head portion centered on a second axis parallel to and offset from the first axis and a first cavity insert extending from the bottom surface. The spacer can include a spacer head portion having a top surface and a bottom surface, the spacer head portion centered on the second axis and an opening insert to be inserted in the opening and extending from the bottom surface, the opening insert centered on the first axis.

A joint implant can include a proximal joint implant element having a proximal curved interface surface with a plurality of proximal registration features. A distal joint implant element can be rotatably coupled to the proximal joint implant element, and can have a distal curved interface with a plurality of distal registration features that are complementary to the proximal registration features such that the registration features interface together to maintain registration between the proximal and distal joint implant elements. A joint implant element connector can include a proximal pin supporting the proximal joint implant element and a distal pin supporting the distal joint implant element. At least one of the curved interface surfaces can include a protrusion that prevents rotation of the joint implant elements when the protrusion contacts the opposite curved interface surface.

A bone joint implant (1) has a proximal part (120) for translational motion over the trapezium in a first carpometacarpal joint and a distal part (110) for intramedullary engagement in the first metacarpal bone. An articulating coupling (103, 121, 123) is for multi-axial motion with translational movement over a bone in one part (120) and rotation in the other part (110) about the articulating coupling (121, 103). A flange (105) extends radially and around the coupling to limit relative rotational motion of the proximal and distal parts about the coupling, and to provide resilience for contact between the proximal and distal parts. The flange has a contoured surface (101) matching an abutting surface (125) of the proximal part (122) upon articulation of the parts in use to extreme positions. The flange (105) is included in an insert (100) in a stem (111) of the distal part (110), the flange extending proximally of the stem (111) and prohibiting contact between the proximal part (120) and the stem (111) during articulation.

A bone joint implant (1) has a proximal part (120) for translational motion over the trapezium in a first carpometacarpal joint and a distal part (110) for intramedullary engagement in the first metacarpal bone. An articulating coupling (103, 121, 123) is for multi-axial motion with translational movement over a bone in one part (120) and rotation in the other part (110) about the articulating coupling (121, 103). A flange (105) extends radially and around the coupling to limit relative rotational motion of the proximal and distal parts about the coupling, and to provide resilience for contact between the proximal and distal parts. The flange has a contoured surface (101) matching an abutting surface (125) of the proximal part (122) upon articulation of the parts in use to extreme positions. The flange (105) is included in an insert (100) in a stem (111) of the distal part (110), the flange extending proximally of the stem (111) and prohibiting contact between the proximal part (120) and the stem (111) during articulation.

There is described an arthroplasty kit comprising a first joint prosthesis component (30) having a portion which is coated with pyrolytic carbon and a second joint prosthesis component (70) comprising a polyethylene portion.

A trapezium implant for replacing the distal articular surface of the trapezium at the carpo-metacarpal joint of the thumb by press fit insertion into a prepared channel in a target trapezium, and an insertion guide system and method for inserting the implant. The implant has a saddle-shaped articular surface configured to articulate with a natural existing base of a first metacarpal, articular surface features mimicking natural trapezium bone anatomy and preserving two centers of rotation of the carpo-metacarpal joint, and a single keel extending from a mounting surface and configured to embed the implant into the thickest area of the target trapezium. The single keel minimizes damage to the trapezium and improves surgical implantation. The target trapezium is prepared using an implant insertion guide system including at least one cutting guide and a slot guide, each of which is releasably securable and configured to receive a cutting device.

A total arthroplasty joint implant (1) has a cup (30) for anchoring in a proximal bone, and a head (10) with a ball (11) on a neck (12) on a base (14), the ball being located distally of the cup and retainer and being for engaging a socket of an intramedullary stem (150) for anchoring in a distal bone. The cup and the head are configured to allow a degree of lateral freedom of movement of a base (14) of the head up to 3 mm in some examples, thereby providing orbital freedom of movement of the head. The base of the head is held by a retainer (20) which presses the base against a planar lateral surface (34) of the cup, and the retainer is in turn held by an overhang rim (36) of the cup, and the retainer overhangs (22) the cup in a counter-balancing manner.

The invention relates to a trial prosthesis (8) for positioning and implanting a prosthesis (40), comprising: a first opening (first trial prosthesis opening) (10) extending through the trial prosthesis (8), and a second opening (second trial prosthesis opening) (12) extending through the trial prosthesis (8), wherein: the first trial prosthesis opening (10) and the second trial prosthesis opening (12) run substantially parallel to each other; the trial prosthesis (8) is designed as a trial socket and has a trial prosthesis head (14); the first trial prosthesis opening (10) runs substantially centrally through the trial prosthesis head (14), and the second trial prosthesis opening (12) runs eccentrically with respect to the trial prosthesis head (14). The invention also relates to an impactor (16) for positioning and implanting a prosthesis (40), comprising a first opening (first impactor opening) (18) extending through the impactor (16), wherein: the impactor (16) is designed as a socket impactor and has an impactor head (24) which is designed in such a way that a prosthesis socket (42) can be plugged onto the impactor head (24); and the first impactor opening (18) runs eccentrically with respect to the impactor head (24). The invention further relates to a system (2) comprising such a trial prosthesis (8) and an impactor (16).

An implant (1) has a proximal part (2) having a proximally facing saddle-shaped surface (7) for translational motion over the trapezium, a distal part (3) having spherical surface (5, and a neck (4) interconnecting the distal and proximal parts and having a longitudinal axis. The distal part has a diameter (W) in the range of 8 mm to 14 mm, and a dimension (L) between a distal-most surface of the implant and a proximal-most surface on the longitudinal axis is in the range of 6 mm to 12 mm. The implant is therefore configured for multi-axis motion in a distal bone and translational motion over a proximal bone, with the distal part bearing against hard cortical bone (105).

A method for placing an implant in one or more bone portions includes inserting a pinning and drilling instrument a first distance into the bone portion at a location in the bone portion such that a pin portion of the pinning and drilling instrument is inserted into the bone portion at the location; after inserting the pinning and drilling instrument the first distance into the bone portion, further inserting the pinning and drilling instrument a second, further distance into the bone portion at the location in the bone portion such that a drill portion of the pinning and drilling instrument is inserted into the bone portion to create an implant-receiving opening at the location; and placing an implant in the implant-receiving opening.

One example embodiment is an apparatus comprising an implant for a metatarsal phalangeal joint, the implant including a first magnet and a second magnet configured such that the first magnet magnetically opposes the second magnet, wherein the first magnet is positioned on a phalanx side of the metatarsal phalangeal joint, and the second magnet is positioned on a metatarsal side of the metatarsal phalangeal joint.

To provide surgical kit systems and methods for using the same for treating thumb arthritis.SOLUTION: A surgical kit system includes a spacer, a strand, a first anchoring mechanism, and a second anchoring mechanism. The spacer is configured to be disposed between the thumb metacarpal and the index metacarpal to prevent impingement between the thumb metacarpal and the index metacarpal. The strand is configured to be anchored to the second and first metacarpals by the first and second anchoring mechanisms to suspend the thumb metacarpal, respectively.SELECTED DRAWING: Figure 1

A method of placing an implant at one or more bone portions includes inserting a pinning and drilling instrument a first distance into a bone portion at a location at the bone portion such that a pin portion of the pinning and drilling instrument is inserted into the bone portion at the location; after inserting the pinning and drilling instrument the first distance into the bone portion, creating an implant receiving aperture at the location by further inserting the pinning and drilling instrument a second further distance into the bone portion at the location at the bone portion such that a drill portion of the pinning and drilling instrument is inserted into the bone portion to create the implant receiving aperture at the location; and placing an implant at the implant receiving aperture.

An interphalangeal implant retainer (20) for retaining an interphalangeal implant (10) is to be used with an implantation tool (30), the implantation tool (30) comprising: a limb support (31) for supporting a phalangeal limb, a driving rod (35), and an actuation mechanism (50) for actuating the driving rod, wherein the driving rod is movable for moving the interphalangeal implant towards the limb support. The implant retainer comprises a jig part (21), which has a plate-shape and includes an implant aperture (22) for retaining an interphalangeal implant.

A bone joint implant (1) has a proximal part (120) for translational motion over the trapezium in a first carpometacarpal joint and a distal part (110) for intramedullary engagement in the first metacarpal bone. An articulating coupling (103, 121, 123) is for multi-axial motion with translational movement over a bone in one part (120) and rotation in the other part (110) about the articulating coupling (121, 103). A flange (105) extends radially and around the coupling to limit relative rotational motion of the proximal and distal parts about the coupling, and to provide resilience for contact between the proximal and distal parts. The flange has a contoured surface (101) matching an abutting surface (125) of the proximal part (122) upon articulation of the parts in use to extreme positions. The flange (105) is included in an insert (100) in a stem (111) of the distal part (110), the flange extending proximally of the stem (111) and prohibiting contact between the proximal part (120) and the stem (111) during articulation.