| 摘要 |
<p>A prosthetic implant for use in replacing the ball end of a biological joint includes a cup member (16) for insertion into the natural socket, an insert (18) received in the cup member defining a ball receiving cavity with a stepped entry, and a split locking ring (20) received in the stepped entry (52,54,56). A ball shaped portion of a prosthesis introduced into the entry will displace the locking ring (20) inwardly to a larger stepped portion (56) of the entry where the locking ring (20) can expand to allow passage of the ball after which the ring (20) contracts and slides over the ball to a locking position in a smaller stepped (54) entry portion.</p> |
