Prosthetic tibial base, and prosthetic tibial insert intended to be immobilized on such a prosthetic tibial base

摘要

The invention relates to a base that includes a unit for osseous attachment onto a tibia, and a plate having posterior, anterior, medial and lateral edges; a posterior pin and an anterior pin having a posterior flat section and an anterior flat section; two posterior lugs protruding above the plate and arranged on the posterior edge of each side of the posterior pin; and two anterior lugs arranged on each side of the anterior pin. The posterior flat section and the anterior flat section are arranged so as to simultaneously engage with the insert. Each posterior tab includes a support extension for inserting, in an anteroposterior direction, a complementary support tab of the insert. Each anterior lug includes a unit for snap-coupling the insert onto the base.

主权项

1. A prosthetic tibial base, intended to immobilize a prosthetic tibial insert configured to be articulated with femoral condyles, the prosthetic tibial base comprising:
an osseous attachment part for attaching the prosthetic tibial base onto a resected part of the tibia of a patient: a platen that comprises:
a plate configured to receive an inferior complementary face of the prosthetic tibial insert, the plate being delimited by a posterior edge, by an anterior edge opposite the posterior edge, by a medial edge and by a lateral edge opposite the medial edge;a posterior pin protruding above the plate, the posterior pin being disposed, along a medio-lateral direction, on a median region of the posterior edge, the posterior pin having a posterior flat section oriented towards the anterior edge;an anterior pin protruding above the plate, the anterior pin being disposed, along a medio-lateral direction, on a median region of the anterior edge, the anterior pin having an anterior flat section oriented towards the posterior edge;two posterior lugs protruding above the plate, the two posterior lugs being disposed on the posterior edge and respectively on each side of the posterior pin;two anterior lugs protruding above the plate, the two anterior lugs being disposed on the anterior edge and respectively on each side of the anterior pin; the posterior flat section and the anterior flat section are arranged in such a manner that the prosthetic tibial insert may bear simultaneously against the posterior flat section and against the anterior flat section wherein:
each posterior lug includes a respective retaining extension for retaining the prosthetic tibial insert on the prosthetic tibial base, each retaining extension being configured to allow the insertion, under the retaining extension and along an anteroposterior direction, of a complementary retaining tab belonging to the prosthetic tibial insert;each anterior lug includes a resilient part for elastic snap-fitting the prosthetic tibial insert onto the prosthetic tibial base; a medial lug protruding above the plate, the medial lug being disposed on the medial edge, the medial lug including a medial retaining wing for retaining the prosthetic tibial insert on the prosthetic tibial base, the medial retaining wing being configured to allow the insertion, under the medial retaining wing and along a medio-lateral direction of a complementary medial retaining tenon belonging to the prosthetic tibial insert; and a lateral lug protruding above the plate, the lateral lug being disposed on the lateral edge, the lateral lug including a lateral retaining wing for retaining the prosthetic tibial insert on the prosthetic tibial base, the lateral retaining wing being configured to allow the insertion, under the lateral retaining wing and along a medio-lateral direction of a complementary lateral retaining tenon belonging to the prosthetic tibial insert.