Increased Posterior Tibial Slope Is Associated with Isolated Meniscal Injuries: A Case-Control Study.

Area of Science:

• Orthopedic Surgery
• Biomechanics
• Radiology

Background:

• The association between posterior tibial slope (PTS) and isolated meniscal injuries is debated.
• An increased PTS may elevate the risk of meniscal tears.

Purpose of the Study:

• To investigate the relationship between increased PTS and isolated meniscal tears.
• To utilize propensity score matching to minimize confounding factors in a case-control study.

Main Methods:

• Retrospective case-control study involving 294 patients with meniscal injuries and a matched control group.
• Standardized lateral knee radiographs were used to measure PTS by two independent observers.
• Propensity score matching and logistic regression were employed for statistical analysis.

Main Results:

• Patients with isolated meniscal injuries exhibited a significantly higher mean PTS compared to controls (p < 0.05).
• No significant association was found between PTS and the location or pattern of meniscal tears.
• Excellent inter- and intra-rater reliability was achieved for PTS measurements (ICC > 0.75).

Conclusions:

• Elevated PTS is an independent risk factor for meniscal injury, irrespective of ACL integrity.
• Early identification of PTS is vital for clinical risk assessment and injury prevention strategies.
• Further research may explore the biomechanical mechanisms linking PTS to meniscal damage.