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  • Heterotopic bone formation in total hip arthroplasty : predisposing factors, classification and the significance for clinical outcome
    Schara, Karin ; Herman, Srečko, 1934-
    Purpose of the study Heterotopic bone formation in the area around the femoralhead is a recognised complication following total hip arthroplasty. Theaim of the study was to determine the prevalence ... of heterotopic ossification and to select a method of classification. Also, we studied the potential association of heterotopic bone with the following variables: sex, age at operation, operative technique, type of prosthesis and previous surgeryon the ipsilateral hip. Material: The study involved 103 consecutive patients who underwent total hip replacement at our department in 1995.175 patients were excluded from the study. Among 103 patients there were 35 male and 68 female patients. Method Antero-posterior radiographs of the hips were reviewed preoperatively, six weeks after the operation and at one year after surgery. The degree of heterotopic bone formation was determined using the classifications of Brooker et al. (Grades 0-IV) and Kjaersgaard-Andersen et al. (Grades I and 11). Results Heterotopic bone has developed in 27 (26,2 %) patients, in 37 % of male patients, mean age 59,8 years, and in only 20,5 % female patients mean age 68,3 years. Brooker et al. Grade I ossification developed in 37 % of the patients, Grade II in 44,4 % and Grade III in 18,6 %.According to the Kjaersgaard-Andersen et al. classification 22 patients developed Grade I and 5 patients Grade II ossification. The leading indicationfor surgery was osteoarthrosis, followed by aseptic necrosis (7,4 %). Heterotopic bone formation was found in 20 % of all patients with aseptic necrosis of the femoral head. Only 2,7 % of patients operated on the ipsilateral hip developed ossifications. (Abstract truncated at 2000 characters)
    Vir: Acta chirurgiae orthopaedicae et traumatologiae Čechoslovaca. - ISSN 0001-5415 (Letn. 68, št. 2, 2001, str. 105-108)
    Vrsta gradiva - članek, sestavni del
    Leto - 2001
    Jezik - angleški
    COBISS.SI-ID - 13376473

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