Conclusion
Squatting and sitting cross-legged can cause
impingement between the femoral neck and
the superior part of polyethylene liner at about the 12-
o’clock position. The excessive stress was able to
cause damage of polyethylene in total hip prosthesis
when a 28 mm femoral head size and 34 mm femoral
offset were used. Patients who have total hip
prosthesis should avoid squatting and sitting crosslegged.