Internal hip or knee prosthesis - has anchoring portion with non-round passage accommodating joint head boss
Abstract
Abstract The internal prosthesis is for hip, knee or other joints, having an anchoring portion screwing into the narrow chamber or a passage drilled in the bone and to which a joint head is fixed. The anchoring portion(1) has an internal passage(5) of non-round and constant or tapering cross-section running in the axial direction, and there is a boss(6) on the joint head(2) inserted in this passage to form tight fit. The anchoring portion can be open on both sides, and the boss can be longer than it. The passage section can be oval, round with key or keyway, cruciform or polygonal, the boss being of complementary section.
Inventors
- 👤 Hans Dr Reimer
Bibliographic Details
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