Objective: To compare heterotopic ossification between femoral head reconstruction and total hip arthroplasty (THA) in patients with ischemic necrosis of femoral head (INFH).
Methods: Between June 1994 and December 2004, the femoral heads were repaired in 1 005 patients with INFH,the total hip was replaced in 485 patients with INFH. The rate of heterotopic ossification was observed in 74 (Ficat II to IV stages) of 1 005 patients and 80 of 485 patients given THA to compared the results of the two methods.
Results: These patients were followed up 2 to 10 years(6.5 years on average). The rates of heterotopic ossification were 5.4% (4/74) and 22.5% (18/80), respectively. There was statistically significant difference between two operative methods (P<0.01).
Conclusion: The rate of heterotopic ossification of femoral head reconstruction is lower than that of THA, so femoral head reconstruction is a better operative method for young patients and THA is suitable for old patients.