Systems for reverse shoulder implants

A system for modular reverse shoulder prosthesis, the system comprising:

• a humeral component having a proximal cavity, the proximal cavity including a bottom surface and an inner sidewall;
• a plurality of teeth provided on the bottom surface of the proximal cavity;
• and
• an insert having a distal end and a proximal end, the distal end configured to engage the proximal cavity of the humeral component and including a surface opposing the bottom surface of the proximal cavity when the insert is inserted into the proximal cavity,
• wherein the distal end of the insert including an outer sidewall, the outer sidewall formed about an insert axis, the proximal end including a concave articular surface, and
• wherein the teeth engage the surface opposing the bottom surface of the proximal cavity and secure the insert against rotation about the insert axis with respect to the humeral component.