Anatomic glenoid shoulder prosthesis together with methods and tools for implanting same

摘要

A glenoid component 10 includes an oval body 12 having a concave lateral articulating surface 14 and an opposing medial surface 16 with a keel 18 extending from the medial surface. The keel 18 extends along a line "A" which is anteriorly offset from the center line "B" of the concave surface 14 and is not collinear with any radius of the concave surface 14. New methods and tools are provided for the implantation of the glenoid component. Sizer drill guides 20 are provided with an alignment arm 28 which assures that the anterior/posterior angle of the pilot hole is approximately 65 degrees. An improved reamer tool 40 is provided which allows the practitioner to attach a reamer head 54 of selected size to the reamer rather than choosing among several reamers of different size at the time of the procedure. A new keel drill guide 70 is provided which locates three drill guide holes 73,75,77 in a plane which is offset approximately 2mm anterior of the pilot hole. A new broach tool 80 is provided for connecting the three holes and form a triangular or trapezoidal cavity for the keel. Methods for installing the glenoid component and using the tools are also disclosed.