When cementing the Univers shoulder fracture system stem, which statement is correct?

The choice that states the stem is down-sized by one before implantation reflects proper technique and optimal fit for the Univers shoulder fracture system stem during the cementation process. This approach ensures that there is adequate space for the cement to fill the void between the stem and the humeral canal. By down-sizing, the stem can achieve secure fixation while accommodating the cement, leading to improved stability and reduced risk of loosening post-operatively.

Cementing techniques in shoulder arthroplasty call for careful consideration of the fit of the implant relative to the prepared bone. If the stem were to be the same size or upsized, it could impede the proper distribution and effectiveness of the cement, potentially leading to complications such as implant instability. The specific recommendation to down-size allows for sufficient cement penetration, which is crucial for achieving long-lasting fixation in the humeral component of the shoulder.

Other approaches mentioned, such as reaming to the exact size or upsizing, do not align with the established practices regarding optimal cement techniques for such implants. Proper understanding of these concepts ensures that implant stability and patient outcomes are maximized.