Artificial joints, in particular coxo-femoral joints
First Claim
1. An articular prosthesis for an artificial joint, comprising two separate parts including an inner cupule and an outer ring, said inner cupule having a part spherical cavity adapted to receive a corresponding part spherical head, said inner cupule being made of a hard and rigid material of low tensile strength and shock resistance, said outer ring being made of metal, said outer ring being shrunk fit on the sidewall of said inner cupule.
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Accused Products
Abstract
A joint prosthesis and particularly for the coxo-femoral or hip joint, said prosthesis being formed by an inner cupule and an outer ring. The outer ring, which is made of metal, is shrunk on the inner cupule, which is made of a ceramic or monocrystalline material. An intermediate annular piece may be provided between the cupule and the outer ring. Preferably the outer ring is provided with an external self-tapping thread.
109 Citations
16 Claims
- 1. An articular prosthesis for an artificial joint, comprising two separate parts including an inner cupule and an outer ring, said inner cupule having a part spherical cavity adapted to receive a corresponding part spherical head, said inner cupule being made of a hard and rigid material of low tensile strength and shock resistance, said outer ring being made of metal, said outer ring being shrunk fit on the sidewall of said inner cupule.
- 14. An articular prosthesis for an artificial joint comprising two distinct parts, as inner cupule and an outer ring, said outer ring being shrunk fit on said inner cupule, said outer ring being provided with at least one external self-tapping thread, and with an inner collecting volume which opens to the outside, in places, through openings, in line with said self-tapping thread and which is adapted to receive bond chips, said inner volume being partly comprised by a helical groove which forms a hollow complementary to said self-tapping thread, said groove following the contour of said thread and being at least partly formed in the thickness thereof.
Specification