TÌNH TRẠNG MẤT TƯƠNG XỨNG GIỮA RĂNG VÀ CUNG HÀM Ở MỘT NHÓM SINH VIÊN TUỔI TỪ 18-24 TẠI HÀ NỘI

Abstract

Objective: To determine the distribution of the prevalence of asymmetry between teeth and dental arches in a group of students aged 18-24. Subjects and methods: A cross-sectional descriptive study was conducted using clinical examinations and measurements on plaster dental arch models of 305 subjects from the Vietnam National University, Hanoi and the Hanoi University of Business & Technology (136 males, 169 females), aged 18-24. Results: For the upper jaw, the majority of cases had an X discrepancy of ≤ 0 mm in both genders, followed by a discrepancy of 0 < X ≤ 5mm at a lower rate, with no cases having an X discrepancy of > 5mm. For the lower jaw, the majority of cases had an X discrepancy of ≤ 0 mm in both genders, with an X discrepancy of ≥ 10mm and X ≤ 0 mm at a lower rate, and no cases had an X discrepancy of 5 < X < 10 mm. According to Angle's classification of occlusion, in the upper jaw, the X discrepancy of ≤ 0 mm in Class 0, I, and II had a high rate (Class 0: 31.1%; Class I: 20.7%; Class II: 25.3%; Class III: 0.3%), and the X discrepancy of 0 < X ≤ 5mm in Class I Angle had the majority (17.0%); in the lower jaw, the X discrepancy of ≤ 0 mm in Class 0, I, and II had a high rate (Class 0: 31.9%; Class I: 26.6%; Class II: 26.6%; Class III: 0.7%), and the X discrepancy of 0 < X ≤ 5mm in Class I Angle had the majority (10.2%). Conclusion: The levels of minor space deficiency and excess space had the highest rates in both jaws, with no significant differences in space deficiency rates between males and females. The distribution of minor space deficiency and no space deficiency in neutral occlusion, Class I and II malocclusions was higher than in Class III Angle.