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Anatomical Study of the Posterior Root of Lateral Meniscus in Human Knee
Author(s):
Rincon G. (Colombia)
Rincon G. (Colombia)
Affiliations:
ESSKA Academy. Rincon G. May 9, 2018; 209755; P14-1332 Topic: Anatomy
Gustavo A. Rincon
Gustavo A. Rincon
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Abstract
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Objectives: The purpose of this study was to describe the footprint of the Posterior Root of Lateral Meniscus (PRLM) and define the topographical relationship with Cruciate Ligaments in the human knee.

Methods: Between February and April 2013 a total of 10 human cadaveric knees were studied. These samples had intact cruciate ligaments and meniscus with no evidence of trauma on the tibial plateau. The Posterior Horn of the Lateral Meniscus was removed from the Posterior Root. We identified and mapped the Posterior Root based on the topographical relationship with its tibial footprint. We performed measurements of the tibial plateau's size, the root and its distance to the cruciate ligaments. Each knee had a CT scan and 3D reconstruction with a metalic tool that served as reference at the center of the root. Finally a grid was used to localize the center of the lateral root in axial view to identify the anatomical position. All data were expressed as mean standard deviations of minimum and maximum. The statistical analysis was performed using Stata software.

Results: The Posterior Root of Lateral Meniscus has a higher anteroposterior foot print (Average 5.35 mm - Standard Deviation 0.47) than medio-lateral (Average 4.95 mm - Standard Deviation 0.49). Is located 7.9 mm in average from tibial foot print of Posterior Cruciate Ligament (Standard Deviation 0.39) and 6.4 mm in average from tibial foot print of Anterior Cruciate Ligament (Standard Deviation 0.45). Anteroposterior size of tibial plateau was 43.6 mm in average (Standard Deviation 4.8) and mediolateral was 74.1 mm (Standard Deviation 4.63). 3D evaluation of posterior root of lateral meniscus was located in quadrant 5C of tibial plateau at 45% mediolateral (42-47%) and 71% anteroposterior (68-73%).

Conclusions: This anatomical study provides new knowledge and information concerning the foot print of the root of posterior horn of lateral meniscus in the human knee. It could be a starting point to help surgeons to perform more anatomical procedures.

Keywords:
Lateral meniscus, posterior root, human knee.
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