Unicompartmental knee arthroplasty(UKA) has become a popular treatment alternative when one compartment of the knee is affected. Excellent intermediate results have been reported in association with the Miller-Galante unicompartmental implant. These excellent results are based on the development of the implants and the stringent patients selection. The functional cruciate ligaments has been a prerequisite for patients undergoing UKA. However, UKA can be one of the procedures in elderly patiants with deficient anterior cruciate ligaments(ACL) but with no symptoms of instability. The purpose of this report is to determine the clinical results after UKA in patients with ACL-deficient knees and compared those after UKA in ACL-intact knees. We identified 332 cases operated from May 2000 to April 2013 whose ACL were evaluated before the operation by MRI., and classified into ACL-deficient group and ACL-intact group. Fixed-bearing Miller-Galante Unicompartmental Knee System or Zimmer Unicompartmental High-Flex Knee Sytem was implanted in all patients. ACL-deficient group included 17 men and 68 women who had an average age of 79 years(range, 70–91 years) at the time of the operation. The underlying diagnosis was osteoarthritis for 77 knees and osteonecrosis for 8 knees. ACL-intact group included 49 men and 198 women who had an average age of 77 years(range, 60–88 years) at the time of the operation. The underlying diagnosis was osteoarthritis for 176 knees and osteonecrosis for 71 knees. Followup for ACL-deficient group was 3.5 years(1–8.8years), and 3.6years (1–13.2years) for ACL-intact group.Introduction
Patients and Methods
