IADR Abstract Archives
Vietnamese Males’ Temporomandibular Joint Larger Than That of Vietnamese Females
Objectives: The study’s aim was to investigate the morphology of glenoid fossa (GF) and articular eminence (AE) of temporomandibular joint (TMJ) in Vietnamese adults using cone-beam computed tomography (CBCT).
Methods: CBCT images were taken in 142 subjects (73 female and 69 male) aged 18-36 (mean 22.2 ± 2.3 years) with normal occlusion and without any TMJ symptoms. Linear distances and angle of glenoid fossa and articular eminence were measured on the planes perpendicular to the long axes of the condyles at their midsections. Measurements included: the thickness of the roof of glenoid fossa (RGF), the glenoid fossa’s width (the lowest point on AE to the posterior glenoid process), the glenoid fossa’s depth (the most superior point of GF to the line connecting the most inferior point of AE to the most inferior point of the auditory meatus), the eminence height (the perpendicular distance between the lowest point of AE and the highest point of GF), and the eminence inclination (the angle between Frankfort plane and the line passing through the highest point in RGF and the lowest point of AE).
Results: The average thickness of the RGF was 0.9±0.3mm in males and 0.8±0.2mm in females. The average glenoid fossa depth was 9.9±0.9mm in males and 9.7±0.9mm in females. The average width of the glenoid fossa was 16.4±1.2mm in males and 15.9±1.3 mm in females. The average eminence height was 10.4±1.1mm in males and 9.6±1.1 mm in females. The average eminence inclination was 51.8±4.5mm in males and 50.3±4.8mm in females. Independent t-test revealed statistically significant differences by gender on all measurements (p<0.05) but glenoid fossa depth (p=0.7).
Conclusions: Males’ measurements were significantly larger than those of females, except for the depth of the glenoid fossa.
Methods: CBCT images were taken in 142 subjects (73 female and 69 male) aged 18-36 (mean 22.2 ± 2.3 years) with normal occlusion and without any TMJ symptoms. Linear distances and angle of glenoid fossa and articular eminence were measured on the planes perpendicular to the long axes of the condyles at their midsections. Measurements included: the thickness of the roof of glenoid fossa (RGF), the glenoid fossa’s width (the lowest point on AE to the posterior glenoid process), the glenoid fossa’s depth (the most superior point of GF to the line connecting the most inferior point of AE to the most inferior point of the auditory meatus), the eminence height (the perpendicular distance between the lowest point of AE and the highest point of GF), and the eminence inclination (the angle between Frankfort plane and the line passing through the highest point in RGF and the lowest point of AE).
Results: The average thickness of the RGF was 0.9±0.3mm in males and 0.8±0.2mm in females. The average glenoid fossa depth was 9.9±0.9mm in males and 9.7±0.9mm in females. The average width of the glenoid fossa was 16.4±1.2mm in males and 15.9±1.3 mm in females. The average eminence height was 10.4±1.1mm in males and 9.6±1.1 mm in females. The average eminence inclination was 51.8±4.5mm in males and 50.3±4.8mm in females. Independent t-test revealed statistically significant differences by gender on all measurements (p<0.05) but glenoid fossa depth (p=0.7).
Conclusions: Males’ measurements were significantly larger than those of females, except for the depth of the glenoid fossa.