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Elevated Posterior Tibial Slope is Associated with Anterior Cruciate Ligament Reconstruction Failures: A Systematic Review and Meta-Analysis

Elevated Posterior Tibial Slope is Associated with Anterior Cruciate Ligament Reconstruction Failures: A Systematic Review and Meta-Analysis

Benjamin Ormseth, BS, UNITED STATES Jeremy Adelstein, BS, UNITED STATES Andrew Garrone, MD, UNITED STATES Alex C. Dibartola, MD, MPH, UNITED STATES Ryan H. Barnes, MD, UNITED STATES Charles Qin, MD, UNITED STATES Christopher C. Kaeding, MD, UNITED STATES David C. Flanigan, MD, UNITED STATES Robert Siston, PhD, UNITED STATES Robert A Magnussen, MD, MPH, UNITED STATES Robert A. Duerr, MD, UNITED STATES

The Ohio State University, Columbus, OH, UNITED STATES


2023 Congress   ePoster Presentation   2023 Congress   rating (1)

 

Anatomic Location

Anatomic Structure

Diagnosis / Condition

Treatment / Technique

Diagnosis Method

Ligaments

ACL


Summary: The present meta-analysis demonstrated that patients with elevated posterior tibial slope on radiographs and MRI are at increased risk for ACL graft failure after primary ACL reconstruction


Objective

To evaluate the association of posterior tibial slope with anterior cruciate ligament (ACL) re-injury following primary ACL reconstruction.

Methods

Pubmed, Scopus, Embase, and CINAHL databases were searched from inception through March 1, 2021 to retrieve relevant studies. Comparative studies reporting posterior tibial slope (PTS) measurements in a cohort of patients experiencing ACL graft failure versus patients with intact primary ACL reconstruction, or studies comparing patients undergoing revision ACL reconstruction versus primary ACL reconstruction were included for analysis. A random-effects model was used to calculate the overall standardized mean difference (SMD) between groups. The following inclusion criteria were used: English language; full text available; Level I, II, or III evidence; human studies; and skeletally mature patients.

Results

After systematically screening 1912 studies, 15 studies met the inclusion/exclusion criteria. Radiographic measurements were used in 6 studies reporting medial PTS in 411 ACL failures versus 2808 controls. Patients with ACL failure had significantly higher medial PTS compared with controls (SMD, 0.50; 95% confidence interval (CI): 0.23, 0.77; P<.0001). Magnetic resonance imaging (MRI) was used in 9 studies reporting lateral PTS measurements in 641 patients with a failed ACL reconstruction compared to 705 controls. Seven of the MRI studies also measured medial PTS in 552 failures versus 641 controls. Patients with ACL Failure had significantly higher lateral PTS on MRI (SMD, 0.58; 95% CI 0.13, 1.03; P=0.012) and medial PTS on MRI (SMD, 0.59; 95% CI 0.23, 0.96; P=0.001) compared to controls.

Conclusions

The present meta-analysis demonstrated that patients with elevated PTS on radiographs and MRI are at increased risk for ACL graft failure after primary ACL reconstruction.


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