This experimental cadaver study aimed to investigate the biomechanical qualities of the perichondrium and cartilage, and to determine the strength of the septal cartilage against bending forces. The nasal septal cartilages of 14 fresh cadavers (eight hours post-mortem) without nasal septal deviation or any history of nasal trauma were excised. Each one was cut into two strips: one with the perichondrium (group A) and one without the perichondrium (group B). A three-point bending test was performed on the strips. The deflection of group A strips was larger than the deflection of group B. Flexural strength was also larger in group A compared to group B strips. The average modulus of elasticity was 122% higher in group A compared to group B and all conducted tests revealed statistically significant differences between the groups. This study objectively shows that the perichondrium provides the cartilage with a 25% bending strength and highlights the importance of the perichondrium, particularly its role in supporting the cartilage. However, the study is limited by the small sample size included. It is also important to remember that the septal cartilage does not exist in isolation but is fixed by the surrounding bone, cartilages and other soft tissues. Therefore, it may not be appropriate to extrapolate from small pieces of individual cartilage to real-life physiological and pathological situations. 

Importance of nasal septal cartilage perichondrium for septum strength mechanics: a cadaveric study.
Tekke NS, Alkan Z, Yigit O, et al.
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Lakhbinder Pabla

James Cook University Hospital, Middlesbrough, UK.

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