Abstract
Purpose. The purpose of this study was to determine whether intraoperative prereconstruction stability measurements and/or patient characteristics were associated with final knee stability after computer-assisted ACL reconstruction. Methods. This was a retrospective review of all patients who underwent computer-assisted single-bundle ACL reconstruction by a single surgeon. Prereconstruction intraoperative stability measurements were correlated with patient characteristics and postreconstruction stability measurements. 143 patients were included (87 male and 56 female). Average age was 29.8 years (SD ± 11.8). Results. Females were found to have significantly more pre- and postreconstruction internal rotation than males (P < 0.001 and P = 0.001, resp.). Patients with additional intra-articular injuries demonstrated more prereconstruction anterior instability than patients with isolated ACL tears (P < 0.001). After reconstruction, these patients also had higher residual anterior translation (P = 0.01). Among all patients with ACL reconstructions, the percent of correction of anterior translation was found to be significantly higher than the percent of correction for internal or external rotation (P < 0.001). Conclusion. Anterior translation was corrected the most using a single-bundle ACL reconstruction. Females had higher pre- and postoperative internal rotation. Patients with additional injuries had greater original anterior translation and less operative correction of anterior translation compared to patients with isolated ACL tears.
Highlights
Anterior cruciate ligament (ACL) reconstruction surgery is common, with approximately 125,000–175,000 procedures performed annually in the United States [1, 2]
The purpose of this study was to determine whether intraoperative prereconstruction stability measurements and/or patient characteristics were associated with final stability results after computer-assisted ACL reconstruction
Intraoperative pre- and post-ACL reconstruction stability measurements were collected; anterior translation, internal rotation, and external rotation were measured at 30 degrees of knee flexion
Summary
Anterior cruciate ligament (ACL) reconstruction surgery is common, with approximately 125,000–175,000 procedures performed annually in the United States [1, 2]. Individual factors that have been associated with higher rates of failure after ACL reconstruction include younger age [3], higher activity level [4], female gender [5, 6], and ligamentous laxity [7, 8]. Injury factors such as mechanism of injury and concomitant lesions of the meniscus and articular cartilage have been shown to predict worse long term outcomes [9,10,11]. The fact that outcome has been shown to be associated with patient and injury specific factors suggests ACL injuries are not all the same and that patients may benefit from individualized treatment
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