DIRECTIONAL LOCKING REVERSE SHOULDER PROSTHESES AND SYSTEMS

摘要

The present disclosure relates to prosthesis systems having trays and liners having an asymmetrical locking mechanism to bias the strength of the liner to resist loading forces and associated methods. The tray has a lateral groove disposed in an inner surface of a lateral circumferential portion of the tray and a medial groove disposed in an inner surface of a medial circumferential portion of the tray. The liner has an upper segment and a lower segment. The liner has a locking portion for lockingly engaging the tray that includes the lower segment. The locking portion has a lateral toe positioned generally diametrically opposite a plurality of resiliently deformable medial fingers defined therein. The liner and the tray are engageable in a lateral-to-medial direction so that the plurality of medial fingers can resiliently deform to engage the medial groove subsequent to engagement of the lateral toe within the lateral groove.

主权项

1. A prosthesis system for a joint, comprising:
a tray having a circumferential lip forming a recess, the circumferential lip including a lateral groove disposed in an inner surface of a lateral circumferential portion of the circumferential lip and a medial groove disposed in the inner surface of a medial circumferential portion of the circumferential lip; and a liner coupleable with the tray with a locking portion, the locking portion comprising a lateral toe configured to engage the lateral groove in the tray and a plurality of medial fingers resiliently deformable to engage the medial groove of the tray to lock the liner onto the tray. wherein the liner and the tray are engageable in a lateral-to-medial direction so that the plurality of medial fingers resiliently deform to engage the medial groove subsequent to engagement of the lateral toe within the lateral groove.