Measurement of buccolingual inclination of posterior teeth and the curve of Wilson in patients with different sagittal skeletal patterns using cone-beam computed tomography
10.12016/j.issn.2096-1456.2023.12.004
- Author:
YAO Yu
1
,
2
,
3
;
XIE Jiaxin
1
,
2
,
3
;
XIONG Guoping
1
,
2
,
3
;
ZHENG Yuyan
1
,
2
,
3
;
WENG Junquan
1
,
2
,
3
;
WEI Xiaoxia
1
,
2
,
3
Author Information
1. Department of Stomatology, Shenzhen People'
2. s Hospital (The Second Clinical Medical College, Jinan University
3. The First Affiliated Hospital, Southern University of Science and Technology)
- Publication Type:Journal Article
- Keywords:
adolescents / adults / orthodontics / posterior teeth / buccolingual inclination / curve of Wilson / sagittal skeletal pattern / cone-beam computer tomography / skeletal malocclusion / mechanism of compensation
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2023;31(12):863-870
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To study the buccolingual inclination of posterior premolars and molars and the curve of Wilson in patients with different sagittal skeletal patterns, to explore the compensation mechanism of horizontal inclination of posterior teeth in patients with different sagittal skeletal patterns and to provide a reference for the control of posterior tooth inclination in the treatment of bone malocclusion.
Methods:This study was reviewed and approved by the Ethics Committee, and informed consent was obtained from the patients. Ninety CBCT scans of adults and ninety scans of adolescents before orthodontic treatment were evaluated in this cross-sectional study. There were 30 skeletal Class I, Class Ⅱ, and Class Ⅲ patients in the adult group and adolescent group. The inclination angles of posterior teeth and the curve of Wilson of first and second molars were measured, and data were analyzed between adolescents and adults with different sagittal skeletal patterns.
Results :Compared with skeletal Class Ⅰ adult patients, the upper posterior molar inclination of skeletal Class Ⅱ patients was significantly lower, and the lower posterior molar inclination was significantly higher. Compared with skeletal ClassⅠ adult patients, the upper posterior molar inclination of skeletal Class Ⅲ adult patients was higher, and the lower posterior molar inclination was significantly lower. The Wilson curve of the second molar in skeletal Class Ⅱ adult patients was significantly higher than that in the other groups. Compared with skeletal ClassⅠ adolescent patients, skeletal Class Ⅲ adolescent patients had a significantly higher upper posterior molar inclination; however, no difference was found between the inclination of the posterior teeth between skeletal Class Ⅰ, Class Ⅱ and Class Ⅲ adolescent patients. Comparing adolescent and adult samples, in skeletal Class Ⅱ patients, adults showed more lingual inclination than adolescents in the upper posterior teeth and less lingual inclination in the lower posterior teeth except for the mandibular first molar. Comparing adolescent and adult samples, in skeletal Class Ⅲ patients, adults showed more lingual inclination than adolescents in the lower posterior teeth except for the mandibular second molars and showed no difference in the upper posterior teeth.
Conclusions:The inclination of the posterior teeth and the curve of Wilson show significant differences between the three sagittal skeletal patterns. Compared with those of skeletal Class Ⅰ patients, the posterior teeth of skeletal Class Ⅱ patients show more lingual inclination in the upper arch and less lingual inclination in the lower arch. Meanwhile, posterior teeth of skeletal Class Ⅲ patients show more lingual inclination in the lower arch and maintain the inclination in the upper arch.
- Full text:不同矢状骨面型患者后牙颊舌向倾斜度及Wilson曲线曲度的CBCT测量研究.pdf
