EVALUATION OF AVASCULAR NECROSIS DURING MIDTERM FOLLOW UP IN DDH CASES TREATED BY SINGLE STAGE SURGERY IN THE WALKING AGE GROUP

Abstract

Developmental dysplasia of hip (DDH) represents a spectrum of disorders in which the femoral head has an abnormal relationship to the acetabulum. Management of DDH presenting in walking stage are primarily surgical because of changes in femoral head, acetabulum and soft tissues around joint. We looked at the incidence of AVN during midterm follow up period in DDH patients in the walking age group who had undergone single stage surgery. Also it evaluates association of different variables with occurrence of AVN. The AVN of head of femur is assessed according to Kalamchi and MacEwen’s classification and AVN gradings were compared with different surgical procedures. In our study, higher incidence of AVN was seen patients who were operated at a higher age, who had higher preoperative Tonnis grading and those who required osteotomies with open reduction. But statistically significant correlation could not be established independently with any of the above mentioned variables.