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  • Title: Comparison of single- and double-bundle anterior cruciate ligament reconstruction using quadriceps tendon-bone autografts.
    Author: Kim SJ, Jo SB, Kumar P, Oh KS.
    Journal: Arthroscopy; 2009 Jan; 25(1):70-7. PubMed ID: 19111221.
    Abstract:
    PURPOSE: The purpose of this study was to evaluate and compare postoperative knee stability and functional scores between single- and double- bundle anterior cruciate ligament (ACL) reconstruction with the use of quadriceps tendon-bone autografts at a 2-year follow-up. METHODS: The records of 59 patients who had ACL reconstruction between January 2005 and April 2006 were analyzed retrospectively. Twenty-eight patients had single-bundle reconstruction (group S) and 31 received double-bundle reconstruction (group D). Ligament stability was assessed with the Lachman and pivot-shift tests and a KT-2000 arthrometer. International Knee Documentation Committee (IKDC) and Lysholm scores were employed to evaluate the functional outcomes. RESULTS: The postoperative mean side-to-side difference for group S was 2.64 mm and 1.79 mm for group D, a difference that was found to be statistically significant (P = .020). Regarding the pivot-shift test, 3 patients had grade 1+ and 1 patient had grade 2+ pivot-shift in group S, while no patients had abnormal pivot-shift in group D (P = .093). The patients who reported grade A or B on IKDC scores were 24 and 28 in group S and D, respectively (P > .1). On the questionnaire of the twisting activity, although statistical difference was not found between the groups, there was a trend toward more restriction in twisting activity in group S (P = .096). We found significant correlation between the twisting activity and instability questionnaire of the Lysholm score (Spearman coefficient, 0.737; P < .001). CONCLUSIONS: Double-bundle ACL reconstruction using quadriceps tendon-bone autografts provide less laxity (1.79 mm) than single-bundle ACL reconstruction (2.64 mm) as measured by the KT-2000. However, we could not find any significant differences in the functional measurements between the 2 groups. LEVEL OF EVIDENCE: Level III, retrospective comparative study.
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