79results about "Finger joints" patented technology

An apparatus can include a metacarpal implant, a trapezium implant, and a spacer. The metacarpal implant can include a stem to be inserted into a first cavity of a metacarpal bone and having a first end and a second end, a radial lip, the radial lip extending from the second end, and an opening, the opening extending from the radial lip to the first end. The trapezium implant can include an implant head portion having a shape to match a shape of a trapezium bone and a first cavity insert, to be inserted into a second cavity of the trapezium bone extending from the bottom surface. The spacer can include a spacer head portion congruent to the implant head portion and an opening insert to be inserted in the opening and extending from the bottom surface.

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.

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.

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.

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.

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.

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.

An implant apparatus has an implant (100, 600) with an intramedullary part (101, 601) and a proximal part (102, 602) having a proximal articular surface (103, 603) which is curved in a generally concave manner for direct contact and sliding engagement with a generally convex distal surface (16) of a proximal bone. The proximal articular surface is curved in an asymmetric manner with a part of the proximal surface extending more proximally on one lateral side of an axis of the stem. The proximal part (102, 152) has rounded comers (104, 154, 604) such that there is no edge or point loading when in contact with a bony surface. The proximal articular surface accommodates sub-luxation of the joint, and in some cases the apparatus has multiple implants or proximal parts of implants so that a particular articular surface can be chosen to suit the degree of sub-luxation.

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.

Disclosed are sterile instruments and instrument kits for use in surgery, said instruments including a reamer assembly comprising a reamer depth stop and a reamer, a grommet placer instrument, and a sizing instrument for use in joint implant surgery. The disclosure also concerns a kit for use in joint implant surgery, comprising said reamer assembly, said grommet placer instrument, a wire guide, comprising a wire guide body, and a guide wire. A method for using one or more of the instruments and kit as described herein is also provided.

Techniques for implantable orthopedic pain management devices are disclosed, including a saddle configured to axially align a top contoured surface to a bone surface and to axially align a bottom contoured surface to another bone surface, and a peripheral protrusion disposed on a peripheral surface of the saddle, the peripheral protrusion being configured to maintain dynamic stability of the saddle between the bone surface and the another bone surface.

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 bone joint implant (1) has a proximal portion (120) for translational movement over a metacarpal bone in a first carpometacarpal joint and a distal portion (110) for intramedullary engagement in a first metacarpal bone. An articulating link (103, 121, 123) is for polyaxial movement in which one portion (120) moves translationally over a bone and the other portion (110) rotates about the articulating link (121, 103). A flange (105) extends radially and about the link to limit relative rotational movement of the proximal and distal portions about the link and to provide resilience for contact between the proximal and distal portions. The flange has a profile surface (101) which in use mates with an abutment surface (125) of the proximal portion (122) when the portions articulate to a limit position. The flange (105) is included in an insert (100) in a stem (111) of the distal portion (110), the flange extending proximally of the stem (111) and preventing contact between the proximal portion (120) and the stem (111) during articulation.

Systems, methods, and devices described herein relate an implant (102) adapted to be placed in a bone in the metatarsophalangeal joint or a metacarpophalangeal joint. In some embodiments, the implant includes a head portion (106) extending from a first surface (110) to a second surface (118) and having a plurality of layers (108, 112, 114) 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 (104) extending from the second surface of the head portion to a bone facing surface.

Techniques for implantable orthopedic pain management devices are disclosed, including incising an opening in a synovial capsule substantially surrounding a joint, using a first tool to form an enlarged opening in the synovial capsule, determining whether to modify the joint, the joint being modified using a second tool if a bone structure coupled to one or more bones is found within the joint and the bone structure is configured to limit articulation of the one or more bones when an implantable device is inserted into the synovial capsule and the joint, and inserting the implantable device into the synovial capsule through the enlarged opening, the implantable device being inserted into the joint using a third tool.

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.

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.

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.

A set of tools for installation of a stem implant into a bone comprises a stem-shaped priming tool 1 having a distal tip 32 and a plurality of cutting teeth 31 along a length thereof and a plurality of stem-shaped broaches 2, 3, 4, 5, 6 of different size. Each of the broaches have a distal tip and a plurality of cutting teeth along a length thereof. The priming tool 1 is shorter than, has more cutting teeth 31 per unit length, and has a sharper distal tip 32 than the smallest broach. A liner exchange tool (95) is provided to withdraw a liner (100) which has been assembled in a stem (111), which in turn has been implanted in a metacarpal. This tool has a threaded head (96) configured to engage a liner by tool rotation.

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 prosthesis for the CMC joint of a thumb therefore includes a metacarpal component that has a first articular surface and a stem configured for insertion and anchoring into a metacarpal canal of a thumb metacarpal bone. The stem has a dorsal surface and an opposing volar surface. Each of the dorsal surface and the volar surface is defined by a proximal region and a distal region. The proximal region of the volar surface has a volar taper angle that is greater than distal region of the volar surface and a dorsal taper angle of proximal region of the dorsal surface is less than the volar taper angle of the proximal region of the volar surface. The prosthesis further includes a trapezial component having a second articular surface cooperating with the first articular surface. The trapezial component is configured to be coupled (e.g., anchored) to a trapezium bone.

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.