학술논문
Tooth size discrepancy in orthodontic patients with skeletal anterior open bite
Document Type
Report
Source
Clinical and Experimental Dental Research. December 2022, Vol. 8 Issue 6, p1516, 7 p.
Subject
Language
English
Abstract
INTRODUCTION Bolton has developed two ratios to estimate the tooth size discrepancy (TSD) based on a study of 55 cases of excellent occlusion. The ratio of summed mesio‐distal widths of [...]
: Objective: To find out if there is any relationship between tooth size discrepancy (TSD) and skeletal anterior open bite (AOB) and to assess the correlation between the amount of AOB and TSD. Method: A total of 100 Class I subjects were included in this study (average age 15.21 ± 2.84 years). Fifty patients had skeletal AOB (>3 mm) and 50 subjects acted as controls and had a normal overbite. Teeth mesio‐distal widths were measured using a digital caliper. Anterior, overall, and posterior TSD ratios were calculated. An independent t‐test was employed to assess differences between groups and between genders. Pearson correlation coefficient was used to assess the correlation between the amount of AOB and TSD. Results: Significant differences in anterior (p =.038) and posterior (p =.015) TSD ratios were detected. In the skeletal AOB group, no significant gender differences were detected (p >.05), whereas in the normal bite and total sample group, males had smaller posterior teeth compared to females (p .05). Conclusions: Skeletal AOB had larger anterior and smaller posterior mandibular teeth, but the differences were less than 1 SD of Bolton's ratios. Males have smaller mandibular posterior teeth than females. The amount of AOB is not correlated with the TSD ratios.
: Objective: To find out if there is any relationship between tooth size discrepancy (TSD) and skeletal anterior open bite (AOB) and to assess the correlation between the amount of AOB and TSD. Method: A total of 100 Class I subjects were included in this study (average age 15.21 ± 2.84 years). Fifty patients had skeletal AOB (>3 mm) and 50 subjects acted as controls and had a normal overbite. Teeth mesio‐distal widths were measured using a digital caliper. Anterior, overall, and posterior TSD ratios were calculated. An independent t‐test was employed to assess differences between groups and between genders. Pearson correlation coefficient was used to assess the correlation between the amount of AOB and TSD. Results: Significant differences in anterior (p =.038) and posterior (p =.015) TSD ratios were detected. In the skeletal AOB group, no significant gender differences were detected (p >.05), whereas in the normal bite and total sample group, males had smaller posterior teeth compared to females (p .05). Conclusions: Skeletal AOB had larger anterior and smaller posterior mandibular teeth, but the differences were less than 1 SD of Bolton's ratios. Males have smaller mandibular posterior teeth than females. The amount of AOB is not correlated with the TSD ratios.