Article ID Journal Published Year Pages File Type
6211506 The Knee 2012 8 Pages PDF
Abstract

The purpose of this study was to compare tibiofemoral (TF) kinematics and TF compressive stresses between single bundle- (SB-) and double bundle-ACL reconstruction (DB-ACLR) during simulated squatting. Twelve matched pairs of fresh frozen cadaver knees were utilized. A simulated squat through 100° of knee flexion was performed in the ACL-intact joint. The ACL was transected and SB- and DB-ACLR procedures were performed in one knee of each pair. The squat was repeated. Knee kinematics were measured using a motion tracking system and the TF compressive forces were measured using thin film pressure sensors. The posterior shifts of the tibia for SB- and DB-ACLR knees were significantly greater than the ACL-intact condition for knee flexion angles 0° to 40° (p < .05). However, there was no difference between the SB- and DB-ACLR knees at any flexion angle (0° to 100°; p = .37). SB- and DB-ACLR knees had greater IE rotation than intact knees from 90° through 50° of flexion (p < .05), but not between 40° and full extension. There was no difference between SB- and DB-ACLR knees (p = .68). The TF compressive stresses of the DB-ACLR were significantly lower than intact for all angles except 10° (p = .06), whereas SB-ACLR knees did not differ from intact at flexion angles between 30° and 50° (p > .32). There were no significant differences between the two reconstruction conditions (p = .74). This study showed that there was no difference in the TF kinematics or compressive stresses between SB- and DB-ACLR, and only minor differences when compared to the intact state.

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