Abstract
Purpose
A debilitating complication following anterior cruciate ligament reconstruction is a secondary meniscus tear. Currently, the literature is mixed regarding the risk factors associated with the incidence of secondary meniscus tears. The aim of this study was to investigate risk factors associated with meniscus tears following an isolated primary anterior cruciate ligament reconstruction. ACL graft failure was hypothesized to be the strongest risk factor for secondary meniscal injury occurrence.
Methods
A retrospective cohort analysis was performed using the PearlDiver Database. Patients with a primary anterior cruciate ligament reconstruction were identified in the database. Patients with concomitant knee ligament injury or meniscus injury present at the time the index procedure were excluded. Patients were grouped to those who had a secondary meniscus tear within 2 years following anterior cruciate ligament reconstruction and those who did not. Univariate analysis and multivariable regression analysis was conducted to identify significant risk factors for a secondary meniscus tear.
Results
There were 25,622 patients meeting criteria for inclusion in this study. Within 2 years from the primary anterior cruciate ligament reconstruction, there were 1,781 patients (7.0%) that experienced a meniscus tear. Graft failure had the highest odds of having a postoperative meniscus tear within 2 years (OR: 4.1; CI 3.5–4.8; p < 0.002). Additional significant risk factors included tobacco use (OR: 2.0; CI 1.0–3.1; p < 0.001), increased Charlson Comorbidity Index (OR: 1.2; CI 1.1–1.4), male gender (OR: 1.1; CI 1.1–1.2; p < 0.001), obesity (OR: 1.1; CI 1.1–1.2; p < 0.001), delayed surgery (OR:1.1; CI 1.1–1.2; p < 0.002), and patients age 30 and older (OR: 1.0; CI 1.0–1.0; p < 0.001).
Conclusions
This study found that anterior cruciate ligament graft failure is the strongest predictor of post-operative meniscus tears. Other risk factors, including tobacco use, increased CCI, male gender, obesity, delayed surgery, and age 30 and older, were established, with several being modifiable. Therefore, targeted preoperative optimization of modifiable risk factors and postoperative protocols may reduce the risk of secondary meniscus tears.
Level of evidence
Level III, prognostic trial.
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Availability of data and materials
The data that support the findings of this study are available from the corresponding author, upon reasonable request.
Abbreviations
- ACL:
-
Anterior cruciate ligament
- ACLR:
-
Anterior cruciate ligament reconstruction
- CCI:
-
Charlson comorbidity index
- CI:
-
Confidence interval
- CPT:
-
Current procedure terminology
- ICD:
-
International classification of diseases
- IRB:
-
Institutional Review Board
- OR:
-
Odds ratio
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DS contributed to the conception, design, and interpretation of data; drafted the introduction, discussion, and conclusion of the manuscript; revised the manuscript; and gave final approval of the version to be published. AA contributed to the acquisition of data and revised the manuscript. AM drafted the methods and results section of the manuscript. AM revised the manuscript critically for important intellectual content. RTK revised the manuscript critically for important intellectual content. SCT revised the manuscript critically for important intellectual content and gave final approval of the version to be published. MJB revised the manuscript critically for important intellectual content and gave final approval of the version to be published.
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IRB approved; study utilized a database, where information is recorded in such a manner that subjects cannot be identified, either directly or indirectly through identifiers linked to subjects.
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N/A; retrospective study utilized a database, where information is recorded in such a manner that subjects cannot be identified, either directly or indirectly through identifiers linked to subjects.
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Sproul, D., Agarwal, A., Malyavko, A. et al. Graft failure within 2 years of isolated anterior cruciate ligament reconstruction is associated with increased risk of secondary meniscus tears. Knee Surg Sports Traumatol Arthrosc (2023). https://doi.org/10.1007/s00167-023-07653-z
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DOI: https://doi.org/10.1007/s00167-023-07653-z