OBJECTIVE: To check the acetabular remodeling through the methods described by Sotelo-Garza and Charnley, as well as the Köhler Line or ilio-ischiatic line on patients submitted to total hip arthroplasty with threaded cup CO-10. RESULTS: Concerning the classification by Sotelo-Garza and Charnley, preoperatively, we had 6 patients on group I (mild) and 14 patients on group II (moderate), not classifying any patient with severe acetabular protrusion or above 15 mm. Postoperatively, group I was constituted of 17 patients, and only 3 on group II, with group III remaining with no patients included. The patient who presented the best acetabular remodeling was the one with the longest follow-up time (10 years), reducing 9 mm by the LK method and 5 mm by Sotelo-Garza and Charnley's method. MATERIALS AND METHODS: 20 cases of Otto pelvis patients treated between 1996 and 2005 submitted to total hip arthroplasty with threaded cup CO-10 were retrospectively described. We checked for acetabular remodeling through the methods by Sotelo-Garza and Charnley and Köhler or ilio-ischiatic line. CONCLUSION: We found a significant acetabular remodeling with the proposed treatment approach, which advocates the use of non-cemented prosthesis for equatorial acetabular support for treating Otto pelvis.
Acetabulum; Acetabulum; Arthroplasty replacement hip; Bone remodeling
