Arthroscopic Posterior Cruciate Ligament Reconstruction With Allograft Versus Autograft

Purpose:To compare and analyze the outcomes of arthroscopic posterior cruciate ligament reconstruction with autograft versus allograft.Methods:71 patients underwent arthroscopic posterior cruciate ligament reconstruction with autogran and allograft. There were 36 patients in autogran group and 35 patients in allograft group. All the patients were evaluated with physical examination and functional ligament test.Comparison analysis was also done in terms of operation time, incision length, fever time, postoperative infection rate, incidence of numbness and dysesthesia around incision, knee flexion strength, as well as blood routine test.Results:The average follow-up of autograft group was 3.2±0.2 years and that of allograft group was 3.3±0.6 years, showing no difference(P>0.05). There were no difference according to knee ROM, Lysholm scores, IKDC and Tegner activity score at final follow-up (P>0.05), except that patients in allograft group had shorter operation time, incision length (P<0.05) and longer fever time (when axillary temperature is more than 37.2℃) (P<0.05). We found difference in posterior drawer test and KT-2000 arthrometer assessment (P<0.05). The posterior tibia displacement averaged 3.8±1.5mm in autograft group and 4.8±1.7mm in allograft(P<0.05). The incidence of numbness and dysesthesia around incision in autograft group was higher than that in allograft group(P<0.05).A significant deficit in knee flexion strength was observed in autograft (P<0.05). There was no infection postoperatively. The white blood cells and neutrophil in allograft group increased more than those in autograft group postoperatively (P<0.05).Conclusions:Both groups of patients had satisfactory clinical outcomes after operation. But in the instrumented posterior laxity test, autograft gave better results than allograft. No differences existed in functional scores.