A comparison of short-term clinical and radiological results of Tönnis and Steel pelvic osteotomies in patients with acetabular dysplasia

Abstract

Objectives: This study aims to compare short-term clinical and radiological results of adult patients with acetabular dysplasia undergoing Tönnis osteotomy or Steel triple pelvic osteotomy. Patients and methods: Between March 2003 and January 2010, clinical and radiologic results in 61 patients who were operated due to acetabular dysplasia at Baltalimani Bone and Joint Diseases Hospital were retrospectively analyzed. The patients were divided into two groups including those undergoing Tönnis osteotomy (Tönnis group) or Steel osteotomy (Steel group). For each patient, anteroposterior and false-profile radiographs of the pelvis were taken and anterior center edge (ACE), lateral center edge (LCE), Sharp angles and acetabular coverage were measured. The relationship between femoral head and acetabulum was assessed. Harris hip score was used for the clinical evaluation. Results: According to the evaluation of the clinical and radiological results, postoperative scores were improved significantly in both groups, compared to preoperative scores (p<0.01).No statistically significant difference was found between the groups in terms of improvements in the radiological and clinical scores, except ACE angle (p<0.01). Conclusion: Our study results suggest that Tönnis and Steel osteotomies offer satisfactory short-term results in the surgical treatment of adult patients with mild to moderate dysplasia.