Set of ancillary equipment for the implantation of acetabular cups of hip prosthesis, and prosthetic acetabular cup assembly ready to be implanted

Abstract

Set of ancillary equipment for the implantation of acetabular cups (1) of hip prostheses, of the type having a substantially hemispherical corolla, consisting of expandable petals (2) which are provided with external barbs (5). The set comprises an obturator (7) for closing the petals, under elastic radial stress, in a position in which they are drawn together, elements (8, 9) for holding this obturator on the edges of the petals by connection with the bottom of the acetabular cup, an ancillary impaction device with which it is possible to impact the acetabular cup, freeing its petals by extraction of the obturator. The set also comprises a plate which expands the petals and which can be introduced into these petals after extraction of the obturator and release of the petals, and an ancillary device with which it is possible to drive the plate into the acetabular cup in order to bring about the radial expansion of the petals after impaction, so as to ensure the anchoring of the acetabular cup by penetration of the anchoring barbs into the osseous wall of the acetabulum.

Dependencies are inferred from the claim text.