We carried out a retrospective and descriptive study of the DELTA cup (Lima Corporate) as used in primary hip replacements to evaluate clinical results and possible complications associated with the technique. We reviewed 181 acetabula implanted between February 2005 and August 2009; with follow-ups ranging from ten months to four years, paying special attention to major perioperative and postoperative complications, such as dislocation or infection, as well as minor ones, such as discrepancies. An X ray review of the implants was also carried out to evaluate integration, osteolysis, position and calcification of the joints.

Results included perioperative complications in 0,5% cases (1 cracked acetabulum for technical mistake); infection in 1.6% cases; dislocation in 1,1% (in ceramic–ceramic couplings, only one required further surgery); discrepancies of 0,5cm to 1.5cm in 2,2% cases. Total bone integration was present in all cases with no displacement of the acetabulum.

The mean size of the implanted cups was 54mm with a mean inclination of 47.5.. The series was made up of 126 ceramic liners and 55 protruded polyethylene liners. We consider that with the hydroxyapatite-coated DELTA implants, we get very good bone integration as long as the proper surgical technique is used and the implant position is correct. None of the acetabula in our series showed displacement during follow-up.