Therapeutic effects of modified porous core decompression versus traditional core decompression on early femoral head avascular necrosis

Objective To observe the clinical therapeutic effects of modified porous core decompression versus traditional core decompression on early femoral head avascular necrosis. Methods Clinical data about 89 patients(120 hips) with early femoral head avascular necrosis who underwent core depression in Chinese PLA General Hospital from June 1, 2010 to December 1, 2015 were collected.Patients were divided into two groups:experimental group(n=44, 59 hips) received modified porous core decompression and control group(n=45, 61 hips) received traditional core decompression.The differences in baseline data, including gender, age, Harries scores and Ficat stage, between two groups were insignificant(P> 0.05).While, the differences in perioperative indexes between two groups were analyzed, including operating time(min), perioperative bleeding(ml) and length of stay(d).Harries scores were tested before and 3, 6, 12 months after surgery, and iconography success rates were evaluated at 3, 6, 12 months after surgery by the changes in hip X-ray and MRI photograph. Results There were significant differences in the operating time(min), perioperative bleeding(ml) and length of stay(d) between experimental group and control group(31.21±6.37) min vs(62.32±9.32) min, (10.45±1.32) ml vs(21.50±2.63) ml, (4.50±1.45) d vs(9.50±1.96) d, P< 0.05.There was no significant difference in Harries score at 3 months after surgery between two groups(83.12±3.76 vs 82.09±4.10, P> 0.05).While, significant differences were found in Harries score at 6, 12 months after surgery between two groups(89.77±2.67 vs 83.25±3.42, 91.39±3.29 vs 86.68±4.08, P< 0.05).The iconography success rate at 3 months after surgery in experimental group was 91.5% and 83.6% in the control group with no statistically significant difference(P> 0.05), while, it showed statistically significant difference in the iconography success rate at 6, 12 months after surgery between two groups(84.7% vs 67.2%, 78.0% vs 59.0%, P< 0.05). Conclusion Compared to traditional core decompression, modified porous core decompression is a better choice for patients with early femoral head avascular necrosis with more satisfying therapeutic effect, simpler surgery method, less bleeding in surgery and quicker recovery after operation.