[Outcome analysis of total hip arthroplasty for traumatic avascular necrosis of femoral head].

OBJECTIVE

To analyze the operative modalities and outcomes of total hip arthroplasty for traumatic avascular necrosis of femoral head (ANFH).

METHODS

A retrospective study was conducted for 40 ANFH patients undergoing total hip arthroplasty from January 2007 to October 2011. There were 31 males and 9 females with a mean age of 49 (39-65) years. Their scores of Harris hip score and visual analogue scale (VAS) at pre- and post-operation were recorded to evaluate the clinical outcomes and assess the location of prosthesis by radiology.

RESULTS

All of them were followed for an average of 31 (19-51) months. All incisions healed with first intention. There was no prosthetic infection, hip dislocation, deep vein thrombosis or nerve injury. The scores of Harris hip and VAS at Month 1 post-operation and the last follow-up were significantly higher than those preoperative ones (P < 0.05). And the Harris hip score of the last follow-up was also significantly higher than that at Month 1 post-operation (P < 0.05). However, no significant difference existed in VAS score (P > 0.05). The outcomes were excellent (n = 28), good (n = 9) and fair (n = 3) with an excellent and good rate of 92.5%. Possible loosing occurred in 1/11 cemented cases while bone stability was achieved in all 29 cementless cases. And 2 case had Brooker type I heterotopic bone without treatment.

CONCLUSION

Total hip arthroplasty for traumatic ANFH can achieve satisfactory clinical efficacies with careful preoperative planning and intraoperative precision.