Background: No studies document the incidence or results of infections and patellar tendon ruptures after anterior cruciate ligament reconstruction with a contralateral patellar tendon autograft.
Purpose: To determine the results of patients who have infections and patellar tendon ruptures after anterior cruciate ligament reconstruction with a patellar tendon autograft and compare the results between ipsilateral and contralateral grafts.
Study Design: Cohort study; Level of evidence, 3.
Methods: The authors determined the incidence of infections requiring surgical intervention and complete patellar tendon ruptures after surgery. Data were analyzed in 2 groups based on the graft source: ipsilateral (n = 2553) or contralateral (n = 2811). Data reviewed included range of motion, quadriceps strength, and subjective evaluations.
Results: Infections occurred in 9 ipsilateral patients (0.35%) and 4 contralateral patients (0.14%) (P = .12). At final follow-up, less than normal knee extension was found in 4 ipsilateral patients and 1 contralateral patient; less than normal flexion was found in 4 ipsilateral patients and 2 contralateral patients. Patellar tendon ruptures occurred in 6 ipsilateral patients (0.24%) and 7 contralateral patients (0.25%) (P = .92). At 1 month after patellar tendon repair, mean motion (degree of hyperextension–degree short of 0° extension–degree of flexion) in the contralateral group was 5-0-137 in the reconstructed knee and 5-0-118 in the graft-donor knee, which was greater than 5-0-98 found in the ipsilateral group for the reconstructed knee (P < .05). The mean Noyes subjective score at a mean of 4 years postoperatively for the tendon-ruptured knee was 87 points in the ipsilateral group and 93 points in the contralateral group (P = .32), which is comparable with the published normative data for the Noyes score reporting a mean score of 93.6 ± 8.3 points.
Conclusion: There were no significant differences in the incidence of infection or patellar tendon rupture between the ipsilateral and contralateral groups. Patients with complications after anterior cruciate ligament reconstruction with a patellar tendon autograft may have less difficulty obtaining full knee motion when the graft is harvested from the contralateral knee.
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