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Abstract


Measurement of posterior tibial slope (a cross-sectional study in Tehran)

Mohamad Qoreishy MD, Syavash Hemmati MD, Ali Sina Shahi MD, Mehrnoush Hassas Yeganeh MD, Seyyed Morteza Kazemi MD*

Shahid Beheshti University of Medical Sciences, Tehran, Iran
* Corresponding Author




Introduction: Posterior tibial slope is the normal anteroposterior inclination of the tibia plateau and plays an important role in the biomechanics of the knee and function of the cruciate ligaments. The posterior tibial angle varies in different populations and there is no report about its measurement in the Iranian population. The aim of this study was to investigate the normal posterior tibial slope in normal people in a teaching hospital in Tehran-Iran.

Materials and methods: In this descriptive study, 431 knees in 431 people (230 men and 201 women) with no history of prior knee problem were evaluated by a lateral knee and leg radiograph. The average age in these cases was 31.7 years (19 – 60 years). These people entered the study by their choice. The angle of tibial slope was measured in all cases and analyzed. Results: The mean slope angle was 9.3±1.4 degrees. There was no statistical relationship between age and gender and posterior tibial slope (P<0.05).

Results: The mean slope angle was 9.3±1.4 degrees. There was no statistical relationship between age and gender and posterior tibial slope (P<0.05).

Conclusion: If we can consider these people as a sample of Iranian population, the normal posterior tibial slope angle is different from other countries. It may be necessary to consider these differences in designing the tibial components for knee arthroplasty.

Keywords: Tibial anatomy, Slope, Knee