In a series of 3,204 consecutive total hip arthroplasties performed on
2,684 patients at the Mayo Clinic from March 1, 1969, through February 28,
1972, reoperation for a complication was necessary in 125 hips (3.9 per
cent). The complications, in order of frequency, were infection,
dislocation, trochanteric problems, ectopic bone, and loosening of the
femoral prosthesis. There were less frequent complications that also
required further surgery. Attention to specific technical details is the
most important means of avoiding a complication that requires
reoperation.