NGHIÊN CỨU TỈ LỆ KÍCH THƯỚC RĂNG THEO PHÂN TÍCH BOLTON TRÊN CÁC DẠNG SAI KHỚP CẮN Ở NHÓM NGƯỜI VIỆT TRƯỞNG THÀNH

Abstract

Objective: This study aims to evaluate variations in tooth size ratios based on gender, across different malocclusion groups, and to quantify the prevalence of tooth size discrepancy in orthodontic patients. Subjects and Methods: A cross-sectional analysis was conducted on 146 dental casts selected from a pool of nearly 4000 pre-treatment orthodontic patients (39 males, 107 females). The samples were classified according to Angle’s classification into Class I malocclusion (86 samples) and Class III malocclusion (60 samples). Tooth size measurements were performed using an electronic caliper, and the ratios were calculated based on Bolton’s analysis. Results: The findings revealed no statistically significant differences in anterior and overall tooth size ratios between males and females within both malocclusion groups (p>0.05). Likewise, no significant differences were observed between Class I and Class III groups (p>0.05). However, the prevalence of tooth size discrepancy was notably higher in malocclusion groups compared to normal occlusion, with rates of 11.63% for Class I, 8.34% for Class III, and 10.27% for the entire sample. Conclusion: While no significant differences were identified between genders or malocclusion groups, the presence of tooth size discrepancy among malocclusion cases highlights the importance of incorporating Bolton analysis as a routine component of orthodontic diagnosis and treatment planning.