The humeral head is replaced with a metallic head assembled on a metallic stem. The glenoid is replaced with a plastic component. The anatomic solution is usually recommended for patients whose rotator cuff is in good condition.
The “normal” structure of the joint is reversed. This means that the metallic ball is attached to the glenoid, while the socket is moved to the humeral side. The reverse solution is usually recommended for patients who suffer from cuff tear arthropathy.