| 摘要 |
An implantable prosthetic joint, particularly suitable for use as an elbow joint, comprising a first component and a second component, each of which includes a stem implantable in bone. The first component has a head portion whose end is essentially spheroid, the head portion being slotted and having a transverse bore therethrough. The second component has a head-engaging portion including a protuberant disc-shaped portion received in the slot of the head portion of the first component. A transverse bore in the protuberant portion is aligned with the bore in the head portion of the first component, and a pin assembly is positioned within the bores for hingedly attaching the first and second components. The head-engaging portion of the second component includes overlying shoulders which receive the ball-shaped head portion of the first component on either side of the slot. The bore through the protuberant portion of the second component is of greater diameter than the diameter of the pin assembly at that point, permitting wobble of the second component relative to the first component. When this wobble, or transverse rocking motion, of the joint occurs, the spheroid end of the head portion of the first component bears against the receiving shoulders of the second component rather than exerting forces on the pin assembly.
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