[A modified porous tantalum implant technology for osteonecrosis of the femoral head: survival and prognostic evaluations of conversion into total hip arthroplasty].

Objective: To assess the survival and prognostic significance of various demographic and radiographic parameters for conversion into total hip arthroplasty after treatment with a modified porous tantalum implant technology for early and intermediate stages of osteonecrosis of the femoral head (ONFH).

Methods: This study included 45 patients (59 hips) with Steinberg Stage I-IV A ONFH undergoing progressively core decompression, impaction bone grafting of 5 mm-composite bone filling material and inserting of a porous tantalum implant. Weight-bearing was forbidden within the first 3 months after implants.

[Efficacies of bone-marrow-derived mononuclear cells with a hydroxylapatite composite in the treatment of osteonecrosis of the femoral head].

Objective: To evaluate the efficacies of core decompression and implantation of concentrated autologous bone marrow containing mononuclear cells (BMMCs) with porous hydroxylapatite composite in the treatment of osteonecrosis of the femoral head.

Methods: A total of 35 patients with 57 osteonecrosis hips with ARCO stage I, stage II and stage IIIA disease were treated by BMMCs with a porous hydroxylapatite composite. The mean age at surgery was 39.

[Intraarterial neoadjuvant chemotherapy for extremity osteosarcoma].

Objective: To summarize the experiences in intraarterial neoadjuvant chemotherapy for extremity osteosarcoma.

Methods: Between January 2002 and December 2007, 111 patients with stage IIB extremity osteosarcoma received preoperative intraarterial chemotherapy after placing chemotherapy pump subcutaneously, en bloc resection and postoperative adjuvant chemotherapy. There were 63 males and 48 females with an average age of 18 years old (range: 14 - 39).