What is the average humeral retroversion that is reproduced during shoulder arthroplasty?

The average humeral retroversion reproduced during shoulder arthroplasty is commonly recognized to be around 30 degrees. This degree of retroversion is important because it aligns the humeral component in a way that mimics the natural orientation of the humeral head within the glenoid cavity. Proper reproduction of this retroversion is crucial for optimizing functional outcomes, including range of motion and stability of the shoulder joint post-surgery.

In total shoulder arthroplasty, achieving the ideal retroversion not only helps in properly aligning the joint mechanics but also reduces the risk of complications such as impingement or instability. The precise reproduction of the retroversion is influenced by anatomical variations and is a standard consideration during the surgical procedure. The selection of the value of 30 degrees reflects a balance based on anatomical studies and clinical findings that inform best practices in shoulder arthroplasty.