Abstract
Ischemic necrosis of the femoral head occurring after the treatment of congenital dysplasia of the hip can negatively affect the long-term prognosis of the involved hip.
The purpose of the study was to evaluate a number of clinical and radiological risk factors for AVN after non-operative treatment of DDH.
Clinical data and radiographs of 77 patients with103 abnormal hips treated because of developmental dysplasia of the hip by closed reduction followed by cast immobilization were reviewed retrospectively. The average age of patients at the time of reduction was 16 months (ranged, 4 to 28) and the average final follow up was 22,4 years (ranged from 13 to 47 years). Kalamchi and MacEwen classification system was used for evaluation of the AVN. Avascular necrosis was found in 35,9% of the treated hips. We established the influence of several radiological and clinical data on the incidence and severity of AVN.
Conclusion: In our analysis the degree of initial dislocation according to Tönnis classification is an important risk factor for AVN. Age at the onset of treatment, presence and size of ossific nucleus, the use and period of preliminary traction, previous treatment with Frejka pillow or Pavlik splint, sex and side were not associated with the incidence and severity of ischemic necrosis. The results have been analysed statistically.
Local Host: British Society for Children’s Orthopaedic Surgery. Conference Theme: Congenital Deficiencies of the Lower Limb. These abstracts were prepared by A.Catterall.
