For the TSA Univers stems, what type of fit is used at the distal end?

In the context of TSA Univers stems, a press fit at the distal end refers to a design feature where the stem is inserted into the bone in a way that allows for immediate stability through mechanical interference. This type of fit relies on the implant being slightly larger than the intramedullary canal, creating a tight bond that allows for initial fixation without the need for additional fixation devices. A press fit is essential as it facilitates immediate weight-bearing and promotes biological integration over time, enhancing the overall stability of the implant within the bone.

This method is particularly valuable in shoulder arthroplasty, where successful load transfer and stability can significantly influence postoperative outcomes. By choosing a press fit design for the distal end of the TSA stem, the implant can achieve a secure fit within the cancellous bone, thereby improving the mechanical properties essential for effective healing and function post-surgery.