Difference in dental arch form between Angle Ⅱ division 1 and normal occlusion assessed by Euclidean distance matrix analysis
- VernacularTitle:Angle Ⅱ~1与正常牙弓形态差异——应用欧几里德距离矩阵分析法
- Author:
Qiong NIE
;
Jiuxiang LIN
- Publication Type:Journal Article
- Keywords:
Dental arch form;
Euclidean distance matrix analysis (EDMA);
Arch width
- From:
Journal of Practical Stomatology
2000;0(05):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To evaluate differences in dental arch forms between the subjects with Angle II division 1(AngleⅡ1 ) and those with normal occlusion. Methods:60 AngleⅡ1 patients and 60 normal occlusion subjects aged 13-17 years old were selected. Fourteen landmarks, corresponding to the cusp tips and incisor edges, were identified on the upper and lower dental casts of all subjects by YM-21115 three dimension measuring machine. Arch form differences between AngleⅡ1 and normal occlusion subjects were assessed by Euclidean distance matrix analysis (EDMA). Results:(1) In both sexes, the upper arch of AngleⅡ1 subjects was larger than that of normal occlusion (1.8% for females and 2.7% for males); and arch shape difference was also significantly different(P
