DISTRIBUTION OF OCCLUSAL BITE INDICES USING T-SCAN IN 18-25-YEAR-OLD ADULTS WITH ANGLE CLASS I AND CLASS III MALOCCLUSIONS IN HANOI

Đình Khởi Trương, Lê Giang Trần

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Abstract

Objective: To determine selected characteristics of the distribution of occlusal bite indices using T-Scan in 18-25-year-old adults with Angle class I and class III malocclusions in Hanoi in 2025. Subject and methods: To conduct a cross-sectional description of occlusal bite indices measured using T-Scan in 38 individuals with Angle class I malocclusion and 26 individuals with Angle class III malocclusion. Results: Occlusal bite force (kg), bite proportion (%), and the number of functioning teeth showed no statistically significant differences (p>0,05) between the right and left sides across all tooth regions, including molars, premolars, and anterior teeth. Most occlusal indices were comparable between males and females; however, in Angle Class I malocclusion, males exhibited significantly greater molar bite force than females (p<0,05). In Angle Class III malocclusion, males demonstrated significantly higher bite force in both molar and premolar regions compared with females (p<0,05). Conclusions: The occlusal bite indices were balanced between the right and left sides of the dental arch. Molar bite force was higher in males than females in both Angle Class I and Class III malocclusions, and premolar bite force was additionally higher in males in Class III. Class III malocclusion showed a forward-shifted pattern of bite distribution compared with Class I, while individuals with Class I exhibited a greater number of functioning teeth than those with Class III.

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References

Trpevska V et al (2014). T-scan III system diagnostic tool for digital occlusal analysis in orthodontics-a modern approach.Pril, 35(2),155–160.
2. Ayuso-Montero R et al (2020). Reliability and validity of T-scan and 3D intraoral scanning for measuring the occlusal contact area. J Prosthodont, 29(1), 19–25.
3. Sathyanarayana HP et al (2012). Assessment of maximum voluntary bite force in adults with normal occlusion and different types of malocclusions. J Contemp Dent Pract, 13(4), 534–538.
4. Roldan SI et al (2016). Are maximum bite forces of subjects 7 to 17 years of age related to malocclusion? Angle Orthod, 86(3), 456–461.
5. Thayyil L et al (2021). Occlusal Contact Points, Areas and Bite Force Distribution in Angle’s Class I, II and III Patients using T-scan. J Clin Diagn Res, 15(11):ZC37-ZC42.
6. Turkistani KA et al (2023). Comparison of occlusal bite force distribution in subjects with different occlusal characteristics. Cranio, 41, 204–11.
7. Abutayyem H et al (2023). Evaluation of occlusal bite force distribution by T-Scan in orthodontic patients with different occlusal characteristics: a cross sectional-observational study. BMC Oral Health, 23:888.
8. Sai KL et al (2025). A T-Scan Analysis of Bite Force Distribution in Natural Dentition – A Prospective Study. Indian J Dent Res, 36(2), 161-164.