ROTATABLE PATELLA DRILL GUIDE

摘要

A patella drill guide includes a base portion rotatably mounted on a bone-gripping component. A trial portion with a contoured articulation surface is above the base portion. The base portion and trial portion have aligned drill guide bores. The base portion and trial portion can be rotated together on the bone-gripping component to optimize the positions of the drill guide bores with respect to the patella surface, thereby optimizing the locations of the mounting pegs of the patella implant component on the patella to optimize the orientation of the patella implant component. The base and the bone-gripping component may be unitary so that the entire assembly rotates on the patella about the central longitudinal axis of the bone-gripping component.

主权项

1. A combination patella drill guide and trial for use in preparing a resected patellar bone surface to receive a prosthetic patellar implant, the patella drill guide and trial comprising:
a flat patella bone-facing surface; at least one spike extending outwardly from the flat patella bone-facing surface; and a contoured articulation surface spaced above the flat patella bone-facing surface of the base portion, the contoured articulation surface being curved; wherein: the drill guide has a plurality of drill guide bores extending from the flat patella bone-facing surface to the contoured articulation surface; each drill guide bore has a length extending from the flat patella bone-facing surface to the contoured articulation surface; and the length of one drill guide bore is greater than the length of another drill guide bore.