True or False: The Univers II and Apex stems allow for +/- 10 degrees of version correction.

• A. True
• B. False
• C. Cannot be determined
• D. Not applicable

Answer: (A)

Version is the rotational alignment of the femoral component around the long axis. Getting the right version, together with the acetabular cup, helps prevent impingement and dislocation and optimizes hip stability. The Univers II and Apex stems are modular designs that permit intraoperative fine-tuning of this rotation. By using a rotating neck or sleeve interface, the surgeon can adjust the final femoral version by about ten degrees in either direction before final locking. This capability provides flexibility to match the patient’s anatomy and achieve the desired combined anteversion without changing leg length or offset. Because non-modular stems fix the version, having a ±10-degree adjustment is a feature specific to these designs, making the statement true.