Patent ID: 7959639

Claim:
An improvement in a trialing system for use in connection with the implant of a prosthetic joint component having a first part for engaging bone at an implant site to secure the component at the implant site, and a second part for enabling articulation of the prosthetic joint, the improvement facilitating selective connection and disconnection between a trial first member corresponding to the first part of the prosthetic joint component and extending along a first longitudinal axis for extending longitudinally into the bone, and a trial second member corresponding to the second part of the prosthetic joint component, with the second member aligned with a second longitudinal axis offset from the first longitudinal axis, the improvement comprising: an offset adapter; a first coupling arrangement for coupling the offset adapter to the first member, with the first member aligned with the first longitudinal axis; a second coupling arrangement for coupling the second member to the offset adapter, with the second member aligned with the second longitudinal axis offset from the first longitudinal axis, the second coupling arrangement including: a post projecting in a longitudinal direction and a socket essentially complementary to the post and extending in the longitudinal direction for receiving the post within the socket in a seated engagement upon reception of the post within the socket, the longitudinal direction being aligned with the second longitudinal axis; a detent arrangement providing detent elements located along the post and the socket and extending in a transverse direction for engagement upon seating of the post within the socket to retain the second member coupled with the offset adapter; and an access arrangement located within the second coupling arrangement in position to provide access to the detent arrangement when the post is seated within the socket, the access arrangement including a first opening extending in the transverse direction through the second member and communicating with the detent arrangement, and a second opening extending in the longitudinal direction through the second member and communicating with the detent arrangement to enable selective access to the detent arrangement through either one of the first opening and the second opening for selective actuation of the detent arrangement to release the engagement of the detent elements and permit disengagement of the post and the socket for release of the second member from the offset adapter such that the second member is selectively released in response to actuation of the detent arrangement for selective replacement.