Abstract
Aims: The purpose of our study was to evaluate the results of using a longitudinal oblong revision (LOR) cup in the management of types III and IV acetabular defects. Methods: Thirty-þve longitudinal oblong revision (LOR) cups were used to reconstruct 29 type III and 6 type IV acetabular defects. Defects were þlled with morcellized allografts in all cases. Structural allografts were used in 2 cases. All patients were followed up for 2 to 6 years (mean, 3.3 years). Results: At latest follow-up, 32 cups were stable (91.4%) and 3 had migrated (8.6%). Two of these cups failed one year after surgery and one four years postoperatively. We found a signiþcant relation between an incomplete cup contact with the acetabular rim and the subsequent failure (p=0.042). The postoperative abduction angle was signiþcantly increased in the group of unstable cups (p=0.032). Pain, limp, use of walking aids, functional level and limb-length discrepancy signiþcantly improved postoperatively (p< 0.0001). Conclusions: For patients with type III and IV acetabular defects, this implant provided encouraging clinical results and showed satisfactory stability at early to midterm follow-up.
Theses abstracts were prepared by Professor Dr. Frantz Langlais. Correspondence should be addressed to him at EFORT Central Office, Freihofstrasse 22, CH-8700 Küsnacht, Switzerland.
