Human nasal cartilage ultrastructure: characteristics and comparison using scanning electron microscopy

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Anatomy

Background:

• Human nasal cartilage, a type of hyaline cartilage, exhibits functional and load-bearing variations based on anatomical location.
• Understanding these variations is crucial for advancing cartilage engineering.

Purpose of the Study:

• To investigate and compare the ultrastructural differences between human nasal septal cartilage and lower lateral cartilage (LLC).
• To determine the implications of these differences for cartilage engineering.

Main Methods:

• Scanning electron microscopy was used to examine ten human nasal cartilage specimens (6 septal, 4 LLC) obtained during rhinoplasty or septoplasty.
• Micrographs were analyzed and measured using specialized photograph analysis software.

Main Results:

• Nasal septal cartilage displayed a mesh framework of thicker collagen fibers (3.18 µm) and larger lacunae.
• Lower lateral cartilage (LLC) showed less organized sheets with fibrous extensions, fewer, narrower lacunae, and thinner collagen fibers (2.29 µm).

Conclusions:

• Significant ultrastructural disparities exist between nasal septal cartilage and LLC, likely due to embryologic origins and mechanical forces.
• The distinct collagen fiber organization and thickness in septal cartilage compared to LLC may be critical for future cartilage engineering strategies.