What role does the humeral stem play in TSA?

The humeral stem plays a crucial role in total shoulder arthroplasty by acting as an anchor for the humeral head component. This involves providing stability and support for the artificial humeral head that replaces the natural one. The humeral stem is typically inserted into the medullary canal of the humerus, and its design allows for optimal fixation, which is essential for maintaining the appropriate alignment and function of the shoulder joint post-surgery.

The stability provided by the humeral stem allows the humeral head component to withstand various stresses during shoulder movements, ensuring that the newly implanted joint can function effectively. This anchoring function is critical for the long-term success of the shoulder replacement, as it helps distribute loads and maintain the integrity of the joint throughout mobility.