Abstract: Devices, systems, and methods for computer-assisted navigation and/or robot-assisted surgery. Navigable instrumentation, which are capable of being navigated by a surgeon using the surgical robot system, allow for the navigated movement of instruments or other surgical devices. The instruments may be suitable for procedures involving navigated and/or robotic total knee arthroplasty, for example.

Abstract: Provided are hip stems for hip arthroplasty, kits of implant systems, and methods of using said hip stems and kits. The hip stems comprise a stem body having a length formed by a proximal portion, a middle portion, and a distal portion, and a stem neck extending from the proximal portion of the stem body and terminating at a free end. The stem portion comprises a first taper along a length of the middle portion of the stem body causing a width of the stem body to decrease, a second taper along the length of the stem body causing a width of the stem body in the posterior-anterior direction to decrease, and a third taper along a base of the stem neck causing a width of the base in the posterior-anterior direction to increase.

Abstract: Knee arthroplasty implants, instruments, systems, and methods of implanting the same. The knee arthroplasty implants may include a femoral implant and a tibial tray implant, each with trabecular surfaces configured to contact bone to provide a scaffold for bone healing and interdigitation. The implants may also include fixation pegs with bulleted profiles to increase the surface area for bone ingrowth. An inserter instrument may include a sliding rack, which is incrementally extended with a rotatable shaft, thereby allowing for quick lock and release of various tibia trays.

Abstract: Methods, systems, and devices are provided for performing a total knee arthroplasty (TKA) procedure to provide a patient with kinematic alignment of the knee. Such methods, systems, and devices include image-based and imageless workflows for pre-operatively or intra-operatively identifying the patient's native posterior tibial slope, and planning the TKA procedure based on the identified slope, including planning of the tibial cut plane.

Abstract: Expandable hip stem implants, systems, and methods of implanting a hip stem during a hip arthroplasty are provided. The implant may include a proximal body having a neck terminating at a free end, a distal stem having a proximal portion coupled to the proximal body and a distal portion, and a plurality of expandable bodies aligned around the distal stem. The plurality of expandable bodies have a collapsed configuration and an expanded configuration such that the plurality of expandable bodies expand radially outward away from one another.

Abstract: Expandable hip stem implants, systems, and methods of implanting a hip stem during a hip arthroplasty are provided. The implant may include a proximal body having a neck terminating at a free end, a distal stem having a proximal portion coupled to the proximal body and a distal portion, and a plurality of expandable bodies aligned around the distal stem. The plurality of expandable bodies have a collapsed configuration and an expanded configuration such that the plurality of expandable bodies expand radially outward away from one another.

Abstract: Tibial implants, instruments, systems, and methods of implanting a tibial tray during a knee arthroplasty. The inserter instrument may include a main body with a pair of fixed posterior tabs, a moveable anterior tab body with an anterior tab, and a rotatable shaft for controlling movement of the anterior tab body. When the shaft is rotated, the anterior tab body is translated into an expanded position to lock the inserter to the tibial tray, thereby providing precise positioning of the tibial tray during implantation.

Abstract: A trial femoral assembly for hip arthroplasty and associated method of use is disclosed that includes a head, a neck connected to the head, and a stem or broach connected to the neck, wherein the neck is expandible and collapsible. Also, the stem or broach can move laterally in relation to the longitudinal axis of the neck. A first embodiment includes a notched rod located within a housing and within a circular lower neck portion having a tilted spiral cam that interacts with the notched rod to provide movement involving extension or retraction of the neck. A second embodiment includes a bevel gear located on an outer surface of the head that engages a screw located inside the head to move the neck to provide extension or retraction. A third embodiment includes at least three nested, telescoping threaded elements with oppositely handed threads that extend or retract the neck.

Abstract: A trial femoral assembly that includes a broach, a neck, and a head. The broach is configured to couple to a femoral shaft. The neck is removably coupled to the broach and includes a center gear configured to rotate about a longitudinal axis of the neck to adjust a length of the neck. The head is removably coupled to the neck and configured for insertion into a hip joint.

Abstract: Tibial implants, instruments, systems, and methods of implanting a tibial tray during a knee arthroplasty. The inserter instrument may include a main body with a pair of fixed posterior tabs, a moveable anterior tab body with an anterior tab, and a rotatable shaft for controlling movement of the anterior tab body. When the shaft is rotated, the anterior tab body is translated into an expanded position to lock the inserter to the tibial tray, thereby providing precise positioning of the tibial tray during implantation.

Abstract: An acetabular shell insertion tool with an anti-rotation feature is provided. The insertion tool attaches to an acetabular shell including a center hole having an internal threading and an anti-rotation recess disposed around the center hole and having a predetermined shape. The insertion tool includes an outer shaft and an inner shaft disposed within the outer shaft. The outer shaft has an anti-rotation projection shaped to be received in the anti-rotation recess of the acetabular shell so as to prevent rotation of the outer shaft relative to the acetabular shell, thereby preventing the insertion tool from disengaging from the shell. The inner shaft has a threaded tip adapted to be threaded into the internal threading of the center hole to lock the insertion tool to the acetabular shell.

Abstract: An acetabular implant for hip arthroplasty includes an acetabular shell to be attached to an acetabulum. The acetabular shell includes an inner surface defining a shell cavity and having a tapered shell section. The acetabular shell includes a tool interlocking structure that mates with a shell insertion tool to inhibit rotation relative to the shell insertion tool. The acetabular shell includes a snap-fit receiver. An acetabular liner is sized and shaped to be disposed in the shell cavity of the acetabular shell. The acetabular liner including an outer surface having a tapered liner section corresponding to the taper of the tapered shell section and engages the tapered shell section to inhibit movement of the acetabular liner relative to the acetabular shell. The acetabular liner includes a snap-fit retainer received by the snap-fit receiver of the acetabular shell to form a snap-fit connection between the acetabular liner and the acetabular shell.

Abstract: A patella implant for knee arthroplasty includes a cap and a base. The cap has an articulating surface and a plurality of first connection members. The base is to be attached to the backside of a patella of a patient. The base includes a cap support mounted to the cap. The cap support includes a plurality of first connection recesses. Each first connection member of the cap is disposed in a corresponding one of the first connection recesses of the cap support to mount the cap to the base.

Abstract: A patella implant for knee arthroplasty includes a cap and a base. The cap has an articulating surface and a plurality of first connection members. The base is to be attached to the backside of a patella of a patient. The base includes a cap support mounted to the cap. The cap support includes a plurality of first connection recesses. Each first connection member of the cap is disposed in a corresponding one of the first connection recesses of the cap support to mount the cap to the base.

Abstract: An acetabular shell insertion tool with an anti-rotation feature is provided. The insertion tool attaches to an acetabular shell including a center hole having an internal threading and an anti-rotation recess disposed around the center hole and having a predetermined shape. The insertion tool includes an outer shaft and an inner shaft disposed within the outer shaft. The outer shaft has an anti-rotation projection shaped to be received in the anti-rotation recess of the acetabular shell so as to prevent rotation of the outer shaft relative to the acetabular shell, thereby preventing the insertion tool from disengaging from the shell. The inner shaft has a threaded tip adapted to be threaded into the internal threading of the center hole to lock the insertion tool to the acetabular shell.

Abstract: An acetabular implant for hip arthroplasty includes an acetabular shell to be attached to an acetabulum. The acetabular shell includes an inner surface defining a shell cavity and having a tapered shell section. The acetabular shell includes a tool interlocking structure that mates with a shell insertion tool to inhibit rotation relative to the shell insertion tool. The acetabular shell includes a snap-fit receiver. An acetabular liner is sized and shaped to be disposed in the shell cavity of the acetabular shell. The acetabular liner including an outer surface having a tapered liner section corresponding to the taper of the tapered shell section and engages the tapered shell section to inhibit movement of the acetabular liner relative to the acetabular shell. The acetabular liner includes a snap-fit retainer received by the snap-fit receiver of the acetabular shell to form a snap-fit connection between the acetabular liner and the acetabular shell.

Abstract: A patella implant for knee arthroplasty includes a cap and a base. The cap has an articulating surface and a plurality of first connection members. The base is to be attached to the backside of a patella of a patient. The base includes a cap support mounted to the cap. The cap support includes a plurality of first connection recesses. Each first connection member of the cap is disposed in a corresponding one of the first connection recesses of the cap support to mount the cap to the base.

Abstract: Devices, systems, and methods for computer-assisted navigation and/or robot-assisted surgery. Navigable instrumentation, which are capable of being navigated by a surgeon using the surgical robot system, allow for the navigated movement of instruments or other surgical devices. The instruments may be suitable for procedures involving navigated and/or robotic total knee arthroplasty, for example.

Abstract: A patella implant for knee arthroplasty includes a cap and a base. The cap has an articulating surface and a plurality of first connection members. The base is to be attached to the backside of a patella of a patient. The base includes a cap support mounted to the cap. The cap support includes a plurality of first connection recesses. Each first connection member of the cap is disposed in a corresponding one of the first connection recesses of the cap support to mount the cap to the base.

Abstract: Tibial implants, instruments, systems, and methods of implanting a tibial tray during a knee arthroplasty. The inserter instrument may include a main body with a pair of fixed posterior tabs, a moveable anterior tab body with an anterior tab, and a rotatable shaft for controlling movement of the anterior tab body. When the shaft is rotated, the anterior tab body is translated into an expanded position to lock the inserter to the tibial tray, thereby providing precise positioning of the tibial tray during implantation.