ArticleJournal of experimental orthopaedics2026
Lateral meniscus repair contributes to controlling pivot shift in patients undergoing anterior cruciate ligament reconstruction with steeper lateral posterior tibial slope.
Article in Journal of experimental orthopaedics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Purpose: The lateral meniscus (LM) controls anterolateral rotatory instability (ALRI) and is considered a secondary restraint. However, how the anterior cruciate ligament (ACL) and LM contribute to ALRI control remains unclear. This study investigated the degree to which ACL and LM contribute to ALRI control and examined factors contributing to ALRI during anterior cruciate ligament reconstruction (ACLR). Methods: Twenty-six patients in ACL and LM-injured knees were enroled. Tibial acceleration in pivot shift was measured using a triaxial accelerometer by adjusting ACL graft tension before and after LM repair. ACL graft tension required for below-healthy-side pivot shift acceleration (minimum required tension [MRT]) was measured before and after LM repair. Patient factors for a larger contribution of LM to ALRI were determined by univariate linear regression analysis between changes in pivot shift acceleration before and after LM repair, and explanatory variables included patient and morphological factors. Furthermore, multiple regression analysis was conducted to identify independent factors significantly associated with the change. Results: LM repair reduced the pivot shift acceleration in most cases, even following ACLR fixed at 10 N for each bundle (20 N in total) and pivot shift acceleration decreased significantly from 4.3 ± 1.2 to 2.9 ± 0.9 m/s Conclusions: LM repair decreased pivot shift acceleration and MRT, indicating the importance of LM repair in force-sharing with the ACL. LM contributes significantly to ALRI in patients with a larger lateral PTS. During ACLR, the LM should be repaired as much as possible. Level of Evidence: Level III, diagnostic study.
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