Femoral osteotomies for the treatment of avascular necrosis of the femoral head.

Leibold, Christiane Sylvia; Schmaranzer, Florian; Siebenrock, Klaus-Arno; Steppacher, Simon Damian (2020). Femoral osteotomies for the treatment of avascular necrosis of the femoral head. Operative Orthopädie und Traumatologie, 32(2), pp. 116-126. Springer 10.1007/s00064-019-00642-x

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OBJECTIVE Unloading of the area of necrosis out of the weight-bearing region by shifting healthy bone in the main weight-bearing area, which may delay the progression of the necrosis and enable healing. INDICATIONS Circumscribed osteonecrosis of the femoral head without advanced degenerative signs (Tönnis grade ≤ 1) in the relatively young patient (age < 50 years). CONTRAINDICATIONS Radiographic joint degeneration (> Tönnis grade 1); extensive avascular necrosis (Kerboul angle > 240°); advanced lesions (≥ Association Research Circulation Osseous [ARCO] classification 3b). SURGICAL TECHNIQUE By performing a surgical hip dislocation, full access to the hip joint is gained. A femoral varus osteotomy is used to turn the necrotic lesion of the femoral head out of the central weight-bearing area and more medially. Osteosynthesis is performed with an angular stable screw or a blade plate. Via a trapdoor procedure, direct debridement and autologous bone grafting from the trochanter major is possible. The cartilage flap is preserved whenever possible or supplanted by an autologous matrix-induced chondrogenesis (AMIC). POSTOPERATIVE MANAGEMENT A passive motion device is installed during hospital stay beginning immediately after surgery to prevent capsular adhesions. After surgery, patients are mobilized with partial weight-bearing of 15 kg with the use of crutches for at least 8 weeks. Forced abduction and adduction as well as flexion of more than 90° are restricted to protect the trochanteric osteotomy. After radiographic confirmation of healing at the 8‑week follow-up, stepwise return to full weight-bearing is allowed and abductor training is initiated. RESULTS Nine patients (10 hips) with osteonecrosis of the femoral head were treated with surgical hip dislocation and varus osteotomy. Six hips were treated with autologous bone grafting, four hips with antegrade drilling. Chondral lesions were sutured in four cases, whereas two cases needed an AMIC treatment. The mean age at operation was 29 ± 9 years (20-49), and the mean follow-up time for all patients was 3 ± 2 years (1-7). Conversion to a total hip prosthesis was required for one hip with progressing arthrosis. The other nine hips showed no progression of necrosis and an improved clinical outcome. Complications were pseudarthrosis of the femoral osteotomy and pseudarthrosis of the greater trochanter.

Item Type:

Journal Article (Review Article)

Division/Institute:

04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Leibold, Christiane Sylvia; Schmaranzer, Florian; Siebenrock, Klaus-Arno and Steppacher, Simon Damian

Subjects:

600 Technology > 610 Medicine & health

ISSN:

1439-0981

Publisher:

Springer

Language:

English

Submitter:

Andrea Stettler

Date Deposited:

28 Jan 2020 08:37

Last Modified:

30 Mar 2020 01:33

Publisher DOI:

10.1007/s00064-019-00642-x

PubMed ID:

31784775

Uncontrolled Keywords:

Hip dislocation Osteonecrosis Osteotomy Trapdoor procedure Weight-bearing

BORIS DOI:

10.7892/boris.139564

URI:

https://boris.unibe.ch/id/eprint/139564

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