How does implant wear occur in TSA?

Implant wear in Total Shoulder Arthroplasty (TSA) occurs primarily due to friction and load generated during the movement of the joint. As the prosthetic components articulate with one another, the constant motion creates a mechanical wear process, which can lead to abrasion and material loss over time. This wear is influenced by the type of materials used in the implants, the design of the components, and the everyday activities of the patient.

The stresses and strains placed on the implant during regular arm movements can contribute significantly to the wear process, making it a crucial consideration in the longevity of the implant and the overall success of the surgery. Understanding this mechanism helps in selecting appropriate materials and designs that can withstand the physical demands placed upon them.

In contrast, while chemical reactions might contribute to some wear mechanisms, particularly in certain environments, they are not the primary driver of wear in TSA. Additionally, although improper surgical technique can lead to complications, it does not directly cause wear itself. Furthermore, stating that wear is not a concern in TSA disregards the reality that implant longevity and function are critical outcomes in shoulder arthroplasty, where wear can ultimately affect joint stability and patient satisfaction.