Vascularization Characteristics of the Different Meniscal Layers: Three-Dimensional Assessment With Micro-CT.

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Anatomy

Background:

• Degenerative meniscal lesions, often horizontal cleavage tears, lack a gold standard treatment.
• Understanding meniscal vascularization is crucial for effective injury management and healing.

Purpose of the Study:

• To investigate and map the microvascular distribution within different meniscal layers and zones.
• To identify distinct vascularization patterns that could inform new classification systems for meniscal injuries.

Main Methods:

• Human cadaveric legs were perfused with a contrast agent.
• Micro-computed tomography was used to visualize and quantify meniscal microvasculature.
• Menisci were analyzed across transverse, radial, and circumferential zones for vascular parameters.

Main Results:

• Medial meniscus showed reduced vascularity in specific peripheral and intermediate layers.
• Lateral meniscus exhibited higher vascularity in the posterior horn, extending into inner zones.
• Lateral meniscus had more vessels with smaller diameters than the medial meniscus.

Conclusions:

• Micro-computed tomography provides a comprehensive analysis of meniscal vascular distribution.
• Findings may lead to new classifications of vascularized regions, improving treatment strategies for meniscal tears.