Bicruciate retaining tibial implant system

摘要

A bicruciate retaining tibial implant baseplate includes a tibial baseplate with medial and lateral condylar portions configured to receive bearing inserts. The baseplate includes an anterior bridge connecting the medial and lateral portions. A posterior wall of the anterior bridge may be angled to provide downward force on a correspondingly angled anterior portion of the tibial eminence when the baseplate is implanted. A method of preparing the tibia for implant includes a punch tower and punch guide configured to both cut the anterior tibial eminence and provide protection to the tibial eminence during resection of the proximal tibia.

主权项

1. A bicruciate retaining tibial implant baseplate comprising:
a superior surface; a bone contacting surface; a lateral condylar portion; a medial condylar portion spaced from the lateral condylar portion defining an opening therebetween; a bridge portion connecting the medial and lateral condylar portions at an anterior end portion of the baseplate; a keel extending inferiorly from the bone contacting surface of the baseplate and having an anterior portion and posterior portions, an inferior edge of the keel continuously sloping with respect to the bone contacting surface of the baseplate from an anteriormost end to a posteriormost end so that thea posteriormost end of the keel extends from the bone contacting surface farther inferiorly than the anteriormost end of the keel, and the keel extending from the lateral condylar portion across the bridge portion to the medial condylar portion; a cylindrical lateral fixation peg proximate a lateral end of the keel and extending inferiorly from the bone contacting surface; and a cylindrical medial fixation peg proximate a medial end of the keel and extending inferiorly from the bone contacting surface.