2015 ISAKOS Biennial Congress ePoster #1624

Anatomical Study of the Posterior Root of Medial Meniscus in Human Knee

Gustavo A. Rincon, MD, Bogota COLOMBIA
Edgar Alberto Munoz, MD, Bogota COLOMBIA
Paula Sarmiento, MD, Bogota COLOMBIA
Marcelo Valdivia, MD, PhD, Cochabamba BOLIVIA
Daniel Quintero, MD, Bogota COLOMBIA
Hospital de San José - University of the Health Science Foundation, Bogota, DC, COLOMBIA

FDA Status Not Applicable

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

Abstract:

Introduction

The purpose of this study was to describe the footprint of the Posterior Root of Medial Meniscus (PRMM) 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 Medial 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 medial 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 Medial Meniscus has a higher anteroposterior foot print (8.3 mm, 8-9 mm -Standard Deviation 2.7-) than medio-lateral (4.3 mm, 3-5 mm - Standard Deviation 1.5-). Is located 6.9 mm (6-8 mm SD 2.3) from the tibial insertion of Posterior Cruciate Ligament (PCL) and 11.4 mm (10-13 mm SD 1.06) from the tibial insertion of Anterior Cruciate Ligament (ACL). Anteroposterior size of tibial plateau was 48.6 mm (45.5-50 mm SD 1.6) and mediolateral was 72.6 mm (68.5-76 mm SD 23). 3D evaluation of posterior root of medial meniscus was located in quadrant 4B of tibial plateau at 38 % mediolateral (36-44%) and 74% anteroposterior (71-77%).

Conclusion

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