Introduction: The larynx is an air passage and a sphincteric device used in respiration and phonation. The larynx, from inside outwards has a framework of mucosa surrounded by fibro-elastic membrane which in turn is surrounded by cartilages and then a layer of muscles.As thyroid cartilage is the largest amongst all the laryngeal cartilage, its study is helpful in constructing biomechanical model, planning of larnygoplasty, positioning of thyroplasty window and analysis of CT and MRI scan. Aim: The aim of the present study is to estimate various dimensions of Thyroid cartilages in Indian subjects. Material & Methods: 50 larynx were obtained from embalmed cadavers, of which 10 larynx were of females. Thyroid cartilage was dissected from the larynx and morphometric analysis was done. Results & Conclusions: The average maximum height of the thyroid laminae was found to be 26.56 mm. ± 2.88 mm. on the right and 26.60 mm. ± 2.84 mm. on the left in males and 24.20 mm. ± 3.89 mm. on both right and left in females. The average width of the thyroid laminae was found to be 36.83 mm. ± 3.60 mm. on the right and 37.07 mm. ± 3.67 mm. on the left side in males and 31.85 mm. ± 3.69 mm. both on right and left in females. The average internal angle of thyroid cartilage was found to be 74.40° ± 8.21° in males and 92.35° ± 6.63° in females.[Rawal J NJIRM 2014; 5(3) :46-50]
Internal Angle, Larynx, Thyroid Cartilage, Thyroid laminae.