Abstract: A patella clamp includes a lockable swivel that is able to freely tilt from 1° to 30° in any direction and then be locked in that orientation. This ability to freely swivel will allow a user to align a resected surface of a patella parallel to the other end of the patella clamp to make the operative surfaces of the implant and the patella substantially parallel to each other.

Abstract: A patella clamp includes a lockable swivel that is able to freely tilt from 1° to 30° in any direction and then be locked in that orientation. This ability to freely swivel will allow a user to align a resected surface of a patella parallel to the other end of the patella clamp to make the operative surfaces of the implant and the patella substantially parallel to each other.

Abstract: A patella clamp includes a lockable swivel that is able to freely tilt from 1° to 30° in any direction and then be locked in that orientation. This ability to freely swivel will allow a user to align a resected surface of a patella parallel to the other end of the patella clamp to make the operative surfaces of the implant and the patella substantially parallel to each other.

Abstract: Knee arthroplasty trials, systems, and methods regarding the same. The knee arthroplasty trial system may include an expandable tibial tray trial having top and bottom plates, an actuation screw retained in the bottom plate, and an expansion ramp configured to slide along the bottom plate and lift the top plate as the ramp translates forward. The actuation screw may define a helical cut with step portions, and the expansion ramp includes a pin configured to engage the helical cut of the actuation screw. When the actuation screw is rotated, the pin rides along the helical cut and is configured to rest within one of the step portions, thereby ensuring that the expandable tibial tray trial expands only to discrete thicknesses.