Excessive Preoperative Anterior Tibial Subluxation in Extension Is Associated With Inferior Knee Stability After Anatomic Anterior Cruciate Ligament Reconstruction

Background: Anterior tibial subluxation (ATS) in extension after anterior cruciate ligament (ACL) injury highlights an increased anterior position of the tibia relative to the femur. Recent studies demonstrated that subluxation is sometimes irreducible and the normal tibiofemoral relationship is not...

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Bibliographic Details
Published in:The American journal of sports medicine 2020-03, Vol.48 (3), p.573-580
Main Authors: Song, Guan-yang, Zhang, Hui, Zhang, Jin, Zhang, Zhi-jun, Zheng, Tong, Feng, Hua
Format: Article
Language:English
Subjects:
Knee
Ligaments
Sports injuries
Sports medicine
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Summary:Background: Anterior tibial subluxation (ATS) in extension after anterior cruciate ligament (ACL) injury highlights an increased anterior position of the tibia relative to the femur. Recent studies demonstrated that subluxation is sometimes irreducible and the normal tibiofemoral relationship is not restored by ACL reconstruction (ACLR), which raises concerns regarding clinical outcomes after ACLR. Hypothesis: Excessive preoperative ATS in extension is associated with inferior knee stability after anatomic ACLR. Study Design: Cohort study; Level of evidence, 3. Methods: From March 2016 to January 2017, a total of 487 consecutive patients with clinically diagnosed noncontact ACL injuries who underwent primary anatomic ACLR were retrospectively analyzed. Of these patients, 430 met the criteria for inclusion in this study. Anterior subluxation of the lateral and medial compartments (ASLC and ASMC) in extension relative to the femoral condyles was measured on preoperative magnetic resonance imaging. Twenty patients (study group) who demonstrated excessive (>10 mm) ASLC and ASMC in extension were matched 1:2 to 40 participants (control group) who showed minimal or no (
ISSN:0363-5465
1552-3365
DOI:10.1177/0363546519900158