Effectiveness of porous tantalum implant combined with core decompression on adult early avascular necrosis of femoral head

Objective To evaluate the curative effectiveness of porous tantalum implant combined with core decompression in the treatment of adult early avascular necrosis of femoral head(ANFH). Methods The 23 hips of 20 patients,including 16 males(18 hips) and 4 females(5 hips),aged from 24 to 60 years old(averaged 38. 2),with femur head necrosis were treated with porous tantalum implant combined with core decompression. According to the Association Research Circulation Osteous(ARCO) classification,2,1,8,9 and 3 hips were in stage ⅠB,ⅠC,ⅡA,ⅡB and ⅡC. Harris score was average 56. 6 ±7. 0 preoperatively. The outcome measures included Harris Hip Score,radiographic outcome,and survivorship analysis with reversion to THA. Results There were 20 successful surgical procedures,with a mean operative time of 30 min(range 20- 55 min) and an average blood loss of 60 ml(ranged from 30 to 110 ml). These cases acquired follow-up,the meaning follow-up duration was 33. 2 months(17- 45 months). Harris score was average 85. 4 ±6. 8 postoperatively. As total hip arthroplasty for the endpoint,the femoral head survival rate was 95. 65%. One hip who had a hormone-using history had aggravated to femoral head collapse as stage Ⅳ,no aggravation in collapse and necrosis in other cases were found by X ray examination. Conclusion The porous tantalum implant combined with core decompression in the treatment of adult early femur head necrosis can achieve a good clinical result. The operation has the advantages of more convenient operation,minimally invasive,safe,less complications,and better hip functional recovery. It is an effective method for adult early ANFH.