Evaluation of dental arch dimensions in 12 year-old Vietnamese children - A cross-sectional study of 4565 subjects

Abstract

This study aimed to define the width and length of the dental arch in 12-year-old Vietnamese children, and to elucidate differences between genders and among ethnic groups. A cross-sectional study was conducted in 4565 12 years-old children from the 4 major ethnic groups in Vietnam (Kinh, Muong, Thai, and Tay), with a healthy and full set of 28 permanent teeth that had never had any orthodontic treatment and with no reconstructive materials at the measured points. The mean variables in all subjects were 36.39 mm for upper inter-canine width; 46.88 mm for upper inter-first molar width; 59.43 mm for upper inter-second molar width; 10.41 mm for upper anterior length; 32.15 mm for upper posterior length 1; 45.52 mm for upper posterior length 2; 28.31 mm for lower inter-canine width; 41.63 mm for lower inter-first molar width; 54.57 mm for lower inter-second molar width (LM2W); 7.06 mm for lower anterior length (LAL); 26.87 mm for lower posterior length 1 (LP1L); and 41.29 mm for lower posterior length 2. Significant differences in these parameters between genders were found in all ethnic groups, except for LAL in the Kinh and Thai groups, and LP1L in the Tay group. Significant ethnic differences were also found in almost all parameters except LM2W in both males and females. Taken together, the representative sizes of dental arches of 12-year-old Vietnamese children have been defined. Our data indicate that there are some variations in dental arch dimensions among ethnic groups and between genders.

Adolescent dental arch development among Southern Chinese in Hong Kong: a geometric morphometric approach

“…Therefore, their findings were not directly comparable with findings of the present study. For other Asian populations, dental arch dimensions of Vietnamese have been investigated based on a large sample of 4565 12-year-old children 28 . The cross-sectional nature of the study likewise impeded comparison with findings of the present study.…”

Determinant Factors of Maxillary Arch Dimension of Students Aged 18 - 25 Years at Prosthetic Department Bhittai Dental and Medical College

“…1 For a very long time, the shape and dimensions of the dental arch have served as an important source of information not just for dentists but also for many other disciplines, including biology, anthropometric measurements, paintings, and sculpture. 2,3 The dental arches are a curvature that is typically characterized and categorized by qualitatively geometric shapes or quantitative mathematical computations. Its shape and size are determined by the muscles that surround the bone of the jaws, the alveolar bone, and hereditary factors.…”

“…Other influences include the environment, growth of the bone, rotation, eruption, and incline of the teeth. 2,4 Such as normal tooth growth, proper soft and hard palate development, which aids in proper phonation as well as other physiological functions. 5,6 The palate is thought to be an important anatomical feature that shapes skeletal patterns because of its morphology and location.…”

Effect of the volumetric dimensions of a complete arch on the accuracy of scanners

“…3 The accuracy of scanners has been evaluated in various ways. [24][25][26] Several studies have evaluated scanner accuracy using the 3-dimensional (3D) overlapping method, [27][28][29][30][31][32][33][34] in which a virtual model obtained by a high-precision industrial scanner serves as the standard for evaluation, and the difference in the average distance between the two virtual models is calculated by overlapping the standard model with that of the virtual model obtained using a scanner to be evaluated. [27][28][29][30] This method has been used by several studies as the standard evaluation of scanner accuracy.…”