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  • Title: Tunnel Widening Following All-Inside Anterior Cruciate Ligament Reconstruction Varies Depending on Soft Tissue Graft Type.
    Author: Gotlin M, Bloom DA, Chevalier N, Golant A, Pace JL, Jazrawi LM, Gonzalez-Lomas G.
    Journal: Bull Hosp Jt Dis (2013); 2023 Sep; 81(3):198-204. PubMed ID: 37639349.
    Abstract:
    PURPOSE: Bone tunnel widening (TW) is a well-described complication after anterior cruciate ligament reconstruction (ACLR). The purpose of this study was to evaluate radiographic bone TW and clinical outcomes in patients with ACLR performed with suspensory fixation on both the femoral and tibial tunnels using different soft tissue grafts. METHODS: Patients who underwent primary ACLR with a soft tissue graft (hamstring autograft or allograft or quadriceps autograft) using an all-inside technique were included for analysis. Anterior cruciate ligament tunnel width was measured postoperatively on anteroposterior and lateral plain radiographs at a minimum of 12 months of follow-up. Clinical outcomes were assessed using the International Knee Documentation Committee (IKDC) subjective knee form as well as assessing patient records for complication data. RESULTS: Fifty patients (15 quadriceps autografts, 24 hamstring autografts, 11 hamstring allografts) were included in this study. The quadriceps autograft cohort was the youngest, (16.6 ± 2.8 years), followed by the hamstring autograft cohort (27.7 ± 9.0 years), and the hamstring allograft cohort (48.2 ± 9.4 years; p < 0.001) for all comparisons. Quadriceps autografts experienced less tibial tunnel-widening (0.6 ± 0.6 mm) than hamstring autografts (2.0 ± 1.1 mm; p = 0.011), which, in turn, experienced less widening than hamstring allografts (3.9 ± 2.3 mm; p < 0.001). Quadriceps autografts also experienced less femoral tunnel widening (0.3 ± 0.6 mm) than hamstring autografts (2.1 ± 1.2 mm; p < 0.001) which, in turn, experienced less tunnel-widening than hamstring allografts (4.0 ± 2.1; p < 0.001). At follow-up, mean IKDC for hamstring autografts, quadriceps autografts, and hamstring allografts were 79.9 ± 17.9, 88.5 ± 7.1, and 77.7 ± 20.4, respectively (p = 0.243). There was no statistically significant difference between groups with respect to postoperative complications; p = 0.874. CONCLUSIONS: Anterior cruciate ligament reconstruction with quadriceps autograft resulted in the least tunnel widening compared to hamstring autograft and allograft when using an all-inside suspensory fixation device. Both autograft groups resulted in less widening than the allograft group. Despite the greatest increased radiographic tunnel widening in the allograft group, there was no significant difference in clinical outcomes or knee laxity.
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