Thirty-six of 44 patients (82%) who underwent ACL reconstruction using freeze-dried, ethylene oxide-sterilized, bone-patellar tendon-bone allografts were evaluated at least 2 years postoperatively. A detailed subjective evaluation using the Lysholm scale was recorded as well as a functional evaluation using the Tegner activity scale. All of the patients received a detailed physical examination that included testing with the KT-1000 ligament arthrometer and the Cybex dynamometer. Complete chart reviews and radiographic evaluations were also obtained. Only 17 patients were considered to be functionally successful and performing at their desired activity level. The average KT-1000 showed a side-to-side difference of 5.9 mm at 30 pounds for the successful group and 7.9 mm for those who had functional failure. The Lysholm scores were 91.6/100 versus 61.1/100 in the failures. Eight patients (22%) at repeat surgery were noted to have complete dissolution of the graft. Large femoral cysts were noted radiographically in all of these patients. It was concluded that freeze-dried, ethylene oxide-sterilized, bone-patellar tendon-bone allografts have a high failure rate and cannot be recommended for ACL reconstruction.
The purpose of this study was to evaluate the results and complications of anterior cruciate ligament surgery in middle-aged patients. Forty-five consecutive pa tients over 40 years old (average age, 44.6 years) who had arthroscopically assisted anterior cruciate liga ment reconstructions with midthird patellar tendon au tografts were evaluated. The patients returned for in terviews, physical examinations, radiographs, Biodex dynamometer strength testing, and KT-1000 arthrom eter testing at an average of 37 months after their surgeries (range, 24 to 96 months). The mean Lysholm and Gillquist score was 91, which corresponds to symptoms only with vigorous activity. The overall scores from the International Knee Documentation Committee form were 29 (64%) normal or nearly nor mal and 2 (4%) severely abnormal. Side-to-side differ ences as determined by the KT-1 000 arthrometer were ≤3 mm in 31 of 40 patients (78%), between 3 and 5 mm in 4 patients (10%), and >5 mm in 5 patients at 30 pounds of anterior displacement. Seventy-six percent of the patients (N = 34) returned to their preoperative activity levels. Three patients required repeat arthro scopic surgery for persistent knee pain and two pa tients had graft ruptures. This study shows that when middle-aged patients undergo surgery, their results can be successful and satisfying to a degree similar to those of younger patients.
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