Importance

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Abstract

The invention relates to a retention pin for fixing a support plate or other prosthesis on bone tissue. The pin is made of a material which is bio-compatible with human tissue and comprises two half-pins each having a half-head for bearing against the prosthesis and a retention shank projecting therefrom, with the outline of each shank being semi-cylindrical and with the two half-pins being generally symmetrical to each other about a radial separation plane passing at least partially along the axis of the pin and extending at least as far as the inside faces of the half-heads from which the respective retention shanks project. Said shanks being of sufficient length to project beyond a wall of bone by a distance which is not less than the diameter of the fixing hole through the bone, thereby enabling locking means in the vicinity of the free end of the pin to urge the two half-pins apart from each other so as to urge them resiliently over at least a portion of their length against the inside wall of the fixing hole.

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First Claim