科研之友
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摘要
Background Isolated acetabular revisions using standard cups are at risk of dislocation. The introduction of a non-constrained dual-mobility cup was designed to improve prosthetic stability without increasing loosening rates, but it is unclear whether the risk of dislocation is reduced. %26lt;br%26gt;Questions/purposes We therefore determined: (1) if the rate of dislocation in isolated acetabular revisions is lower with a dual-mobility cup, (2) implant survival, (3) patient function, and (4) radiographic incidence of migration, loosening, and osteolysis. %26lt;br%26gt;Methods We prospectively followed 33 selected patients who underwent isolated acetabular revisions with a minimum of 2 years%26apos; followup (mean, 3 years; range, 25 years). In 24 patients a stainless steel dual-mobility cup was cemented into an antiprotrusio cage, whereas in nine we used a hyaluronan dual-mobility revision cup with a foramen hook and superior and posterior flanges screw fixations. We determined Harris hip (HHS) and WOMAC scores and examined radiographs for migration, loosening, and osteolysis. %26lt;br%26gt;Results There were no dislocations. Survivorship rates of the femoral and acetabular components were 97% at 5 years; the rerevision rate for any reason was 3%. At last followup, the mean HHS increased from 48 points preoperatively to 86 points. No patients had progressive osteolysis, component migration, or loosening on radiographs. %26lt;br%26gt;Conclusion In this select group of isolated acetabular revisions, our data suggest the use of a dual-mobility cup reduced the risk of dislocation without increasing loosening from 2 to 5 years. %26lt;br%26gt;Level of Evidence Level IV, therapeutic study. See the Guidelines for Authors for a complete description of levels of evidence.
- 出版日期2012-12
