The influence of radiation therapy on the Harris hip score in cementless total hip arthroplasty.

Heterotopic ossification may adversely influence the outcome of total hip arthroplasty, causing discomfort or limiting the range of motion and function of the hip. In this prospective study we examined the influence of prophylactic radiation therapy on the postoperative Harris Hip Score in cementless total hip arthroplasty, with a follow-up from 2 to 5 years. Radiation therapy lowered the incidence of unsatisfactory results and increased the Harris Hip Score in hips with a poor preoperative range of motion.