How much press fit does the Univers Revers Stem provide compared with the broach?

• A. 1.0 mm
• B. 2.0 mm
• C. 1.5 mm
• D. 0.5 mm

Answer: (C)

Press-fit describes the fringe of interference created when an implant is sized larger than the canal prepared in the bone, so it grips as it is inserted. The Univers Revers stem is designed to achieve roughly one and a half millimeters of press fit relative to the canal size set by the broach. That level of interference provides solid initial fixation by maximizing friction along the canal, which helps minimize micromotion during the early healing period.

Thinking about the numbers helps: too little interference would give insufficient stability and could allow movement at the bone-implant interface; too much interference can make insertion harder and increase the risk of fracture or damage to the bone. The one and a half millimeters value sits at a balance point intended to provide reliable initial stability without excessive risk during implantation.