Cotyloid cavity prosthesis

Abstract

A cotyloid cavity prosthesis consists of an outer shell (1) and a bearing insert (2) held together by a locking device (3). The locking device comprises an elastic lip (6) and an undercut surface (4) interacting with the latter. The dimensions are chosen such that, once mounted, the tip (9) of the lip rests on the undercut surface (4), with bending deformation of the lip (6). In order to accomplish the latter, the undercut surface (4) forms a smaller angle with the center axis of the prosthesis than does the deformation line of the tip (9) of the lip.

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