Article Sidebar

PDF
Date Published: 03/02/2026
Abstract Views: 0
Views PDF: 0
DOI: https://doi.org/10.51298/vmj.v558i3.17247
Issue
Vol. 558 No. 3 (2026)
Section
Các bài báo
How to Cite
Trương , Đình K., & Nguyễn , Đại P. (2026). OCCLUSAL AND ARCH CHARACTERISTICS IN 8–10-YEAR-OLD CHILDREN IN HANOI USING AN INTRAORAL 3D SCANNER IN 2025. Vietnam Medical Journal, 558(3). https://doi.org/10.51298/vmj.v558i3.17247

OCCLUSAL AND ARCH CHARACTERISTICS IN 8–10-YEAR-OLD CHILDREN IN HANOI USING AN INTRAORAL 3D SCANNER IN 2025

Đình Khởi Trương 1,, Đại Phong Nguyễn 1
1 University of Medicine and Pharmacy, Vietnam National University, Hanoi

Main Article Content

Abstract

Objective: Analysis of occlusal characteristics, dental arches, and their correlations in 8-10-year-old children at Lien Ninh Primary School, Thanh Tri District, Hanoi, in 2025. Subject and methods: A cross-sectional descriptive study was conducted on 224 children aged 8-10 years (117 boys and 107 girls), divided into three age groups: 64 children aged 8, 60 children aged 9, and 100 children aged 10. Results: In the 8-year-old group, the mean overjet in boys (3,97 ± 2,03 mm) was higher than in girls (2,89 ± 1,96 mm), and this difference was statistically significant (p<0,05). In the 9-year-old group, there were no significant differences between boys and girls in overbite, overjet, anterior crowding, or the curves of Spee and Wilson (p>0,05). Similarly, in the 10-year-old group, no gender-related differences were found for any of these parameters (p>0,05). When comparing across age groups, overbite, overjet, anterior crowding, and the curves of Spee and Wilson showed variations among ages; however, these differences were not statistically significant (p>0,05). Conclusions: The study showed that among 8-10-year-old students, the parameters including overbite, overjet, anterior crowding, and the curves of Spee and Wilson all remained within normal physiological limits, with no statistically significant differences among age groups. Regarding gender, a significant difference was observed only in the 8-year-old group, where boys had greater overjet values than girls, while other variables showed no gender-related variation. The correlations between the curves of Spee and Wilson and dental arch dimensions existed but were weak, more pronounced in the mandibular arch.

Article Details

Keywords

Occlusion, dental arch, intraoral 3D scanning

References

1. Yusof ZYM et al (2019). The prevalence of orthodontic treatment need and malocclusion problems in 8–9-year-old schoolchildren: a study in the south of Thailand. J Dent Assoc Thai, 69(2), 83-91.
2. Nguyen TT et al (2022). Associations between oral habits and malocclusion among Vietnamese schoolchildren aged 8–12 years. Int J Paediatr Dent, 32(5), 615-624.
3. Mai W et al (2024). Prevalence and contributing factors of malocclusion in Chinese Zhuang children aged 7–8 years. Front Pediatr, 12:1308039.
4. Björk A (1953). Variability and age changes in overjet and overbite. Acta Odontol Scand, 11(1), 3-41.
5. Jordan AR et al (2023). Prevalence of malocclusions in 8- and 9-year-old children in Germany. J Orofac Orthop, 84(2):e202-e213.
6. Kumar KPS (2012). Significance of Curve of Spee: An orthodontic review. J Orthod Dentofacial Orthop, 110(2), 206-210.
7. Patano A et al (2023). Mandibular Crowding: Diagnosis and Management. J Clin Pediatr Dent, 47(3), 172-180.
8. Dindaroğlu F et al (2016). Evaluation of the Relationship between Curve of Spee, WALA-FA Distance and Curve of Wilson in Normal Occlusion. Turk J Orthod, 29, 91-97.
9. Kanavakis G et al (2013). The role of occlusal curvatures and maxillary arch width. Dentomaxillofac Radiol, 42, 376-382.
10. Li L et al (2020). Study on the effect of leveling curve of Spee on the shape of dental arch. Stomatology, 40(12), 1098-1103.