Original Article
Analysis of the basal arch widths at different positions in posterior arch
Yang Ying, Yang Ru, Li Qianwen, Tian Yulou
Published 2021-09-20
Cite as Chin J Orthod, 2021, 28(3): 147-151. DOI: 10.3760/cma.j.cn115797-20200908-21306
Abstract
ObjectiveComparing the basal arch width at different positions in posterior arch.
MethodsThirty cases of Angle Class Ⅱ and Class Ⅲ patients were selected. The plaster models were scanned by 3Shape scanner to obtain digital models. The initial digital model served as control group T0; simulating tooth movement to get Class I relationship by the 3Shape software generated progress digital models as study group(T1, T2, T3). The width analysis method of the alveolar ridge center was used to measure the width of the digital models between the control group and the study group. Statistical analysis was performed by SPSS 22.0.
ResultsIn Class Ⅱ and Ⅲ cases, the measurement results of between the study group and the control group were statistically significant (P<0.01), but the three study groups showed no statistically significant (P>0.05); There is a linear correlation between the sagittal movement of the first molar and the change in the width of the upper-lower alveolar base bones. Class Ⅱ is a negative linear correlation with a correlation coefficient of -0.83. Class Ⅲ is a positive linear correlation with a correlation coefficient of 0.938.
ConclusionsThere are differences in the measurement results of the maxillary and mandibular basal bone at different sagittal position of the molars.
Key words:
malocclusion; transverse analysis; center of alveolar crest; digital model
Contributor Information
Yang Ying
The Second Department of Orthodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provinical Key Laboratory of Oral Diseases, Shenyang, Liaoning Province China, 110002
Yang Ru
The Second Department of Orthodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provinical Key Laboratory of Oral Diseases, Shenyang, Liaoning Province China, 110002
Li Qianwen
The Second Department of Orthodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provinical Key Laboratory of Oral Diseases, Shenyang, Liaoning Province China, 110002
Tian Yulou
The Second Department of Orthodontics, School and Hospital of Stomatology, China Medical University, Liaoning Provinical Key Laboratory of Oral Diseases, Shenyang, Liaoning Province China, 110002
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