End member for a bone fusion implant

An end member for use with an implant for fusing bone comprising:

• a first portion having a first top surface adapted and configured to engage a bone surface, an outer perimeter edge, an inner perimeter edge defining a central opening, and at least a first channel;
• wherein the first channel extends from a first point on the outer perimeter edge to a second point on the outer perimeter edge such that the first channel divides the first portion into two substantially identical portions;
• wherein the width of the first channel at the first point on the outer perimeter edge is substantially equal to the width at the second point on the outer perimeter edge;
• a second portion configured and dimensioned to be inserted into a bore of the implant;
• and
• a shoulder joining the first and second portions and sized to rest on an edge of the implant when the second portion is inserted in the bore of the implant.

An end member for use with an implant for fusing bone comprising:

• a first portion having a first top surface adapted and configured to engage a bone surface, a continuous outer perimeter edge, a continuous inner perimeter edge defining a central opening, and a first channel extending from a first point on the outer perimeter edge to a second point on the outer perimeter edge;
• a second portion configured and dimensioned to be inserted into a bore of the implant;
• and
• a shoulder joining the first and second portions and sized to rest on an edge of the implant when the second portion is inserted in the bore of the implant.