title: Porous tantalum rods for treating osteonecrosis of the femoral head.
abstract: This study evaluated the outcomes of using porous tantalum rods for the treatment of osteonecrosis of the femoral head (ONFH). We performed core decompression and inserted porous tantalum implants in 149 patients (168 consecutive hips) with ONFH. Hips had large (65), medium (64), or small (39) lesions; 63 lesions were lateral, 68 were central, and 35 were medial. Conversion to total hip arthroplasty (THA) was the end point of this survey. A total of 130 cases (138 hips) were followed. The mean follow-up time was 38.46 ± 5.76 months; 43 hips (31%) were converted to or needed THA. Of the 43 hips requiring THA, 33 had large lesions, including 1 medial, 3 central, and 29 lateral lesions; 9 had medium, lateral lesions, and 1 hip had a small, lateral lesion. Bone grafting was used in 59 hips, with 3 hips failing; 40 of 79 hips without bone grafts failed. The sum distances between the tops of the rods and the lateral lesion boundaries (SDTL, mm) were measured in anteroposterior and lateral radiographs. In the failure and spared groups, the average SDTLs were 7.65 ± 2.759 and 0.83 ± 2.286 mm, respectively. The survival of porous tantalum rods used for treating early-stage ONFH was affected by the size and location of the lesion, whether or not a bone graft was used, as well as the distance between top of the rod and the lateral boundary of the lesion.
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: Z H
authors.initials: ZH
authors.lastname: Liu
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China zhwscn@yeah.net.
authors.forename: W S
authors.initials: WS
authors.lastname: Guo
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: Z R
authors.initials: ZR
authors.lastname: Li
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: L M
authors.initials: LM
authors.lastname: Cheng
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: Q D
authors.initials: QD
authors.lastname: Zhang
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: D B
authors.initials: DB
authors.lastname: Yue
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: Z C
authors.initials: ZC
authors.lastname: Shi
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: B L
authors.initials: BL
authors.lastname: Wang
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: W
authors.initials: W
authors.lastname: Sun
authors.affiliation: Department of Joint Surgery, China-Japan Friendship Hospital, Beijing, China.
authors.forename: N F
authors.initials: NF
authors.lastname: Zhang
mesh_terms: D000328:Adult; D005260:Female; D005271:Femur Head Necrosis / Q000175:diagnosis / Q000209:etiology / Q000628:therapy*; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D019736:Prostheses and Implants; D013635:Tantalum / Q000737:chemistry / Q000627:therapeutic use*; D017211:Treatment Failure; D016896:Treatment Outcome
chemical_list: D013635:Tantalum