A
Decreased femoral offset leading to abductor insufficiency
B
Use of highly cross-linked polyethylene liner
C
Ceramic femoral head usage
D
Use of uncemented femoral stem
Explanation:Femoral offset is a critical determinant of hip stability following total hip arthroplasty. Decreased femoral offset reduces the tension in the abductor musculature and soft tissue envelope, leading to diminished joint stability and increased risk of dislocation. Proper restoration of offset improves abductor lever arm and joint biomechanics. Failure to restore offset also reduces range before impingement occurs. Studies show that inadequate restoration of femoral offset correlates strongly with postoperative instability. Surgeons must carefully plan implant positioning and component selection to restore native biomechanics. Reference: McGrory BJ. "Effect of Femoral Offset on Range of Motion and Stability in Total Hip Arthroplasty." Clinical Orthopaedics and Related Research, 2005.