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2 Year Outcomes of Lateral Meniscal Oblique Radial Tear (LMORT) Repair at the Time of ACL Reconstruction Surgery

2021 Congress Paper Abstracts

2 Year Outcomes of Lateral Meniscal Oblique Radial Tear (LMORT) Repair at the Time of ACL Reconstruction Surgery

Erik Therrien, MD, MSc, FRCSC, CANADA Bryant M. Song, MS, UNITED STATES Ryan R Wilbur, BS, UNITED STATES Michael J. Stuart, MD, UNITED STATES Christopher L. Camp, MD, UNITED STATES Bruce A. Levy, MD, UNITED STATES Aaron J. Krych, MD, UNITED STATES

Mayo Clinic, Rochester, Minnesota, UNITED STATES


2021 Congress   ePoster Presentation     Not yet rated

 

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Summary: Functional outcomes and reoperations at 2 years after type 3 and 4 LMORT repairs at the time of ACLR compared favorably to a matched cohort of isolated ACL reconstructions.


Objective

The posterior horn lateral meniscus oblique radial tear (LMORT) was recently identified in 12% of acute anterior cruciate ligament (ACL) injuries. A descriptive classification as well as individual management strategies were suggested. However, patient reported outcomes specifically for LMORTs type 3 (incomplete LMORT that extended >10 mm from root) and type 4 patterns (complete LMORT >10 mm from root) have not been reported. The purpose of this study was to determine the 2 year functional outcomes after meniscal repair of type 3 and 4 LMORTs at the time of ACL reconstruction (ACLR) surgery.

Methods

A retrospective matched cohort study was performed in a single academic institution between January 2010 to December 2018. 35 patients who underwent primary ACL reconstruction (ACLR) with concomitant posterior horn LMORT types 3 and 4 repairs with a 2-year minimum follow-up were included. Functional outcomes, reoperations and ACL failures were compared with a 1:1 matched cohort of 35 patients with isolated ACLR with a 2-year minimum follow-up. Patients were matched by age ±5 years, surgery date ±1 year, and surgeon.

Results

Average age at time of surgery was 22 years. Mean follow-up period was 4.6±2.0 years vs 4.6±2.2 years for the ACLR+LMORT and isolated ACLR groups, respectively. One ACL graft failed in each group. There was a total of 3 reoperations per group, including 1 ACLR revision, 1 lysis of adhesion and 1 meniscus surgery. No posterior horn LMORTs repair failures were reported. Functional outcomes were comparable between the groups at minimum 2 year follow up (IKDC: ACLR+LMORT 93.6 ± 5.3 vs isolated ACLR 91.6±8.2, P = .216; Tegner Activity Score: ACLR+LMORT 6.4±1.3 vs isolated ACLR 6.1±1.5, P = .517).

Conclusion

Repair of type 3 and 4 LMORTs at the time of ACL reconstruction showed encouraging results for optimizing meniscus preservation and knee stability. Functional outcomes and reoperations at 2 years after type 3 and 4 LMORT repairs at the time of ACLR compared favorably to a matched cohort of isolated ACL reconstructions.


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