The characteristics of alveolar and dental arch width in Angle Class Ⅱ Division 2 malocclusion
LI Lin
ZHANG Min
WANG Gui-zi
JI Fei
Abstract：AIM:To analyze the characteristics of alveolar and dental arch width of Angle Class Ⅱ Division 2 malocclusion.METHODS:98 dental casts without orthodontic treatment were selected in Han Zhong City.Dental casts of Angle Ⅱ 2 were in the experimental group(n =35),Angle Ⅱ 1(n =33) and normal occlusion (n =30) were in the control groups.The arch width of each cast was measured by digital vernier caliper.The characteristics of arch width was analyzed by statistical software SPSS for the comparison among the 3 groups.RESULTS:The upper intercanine width of the subjects with Angle Ⅱ 2 was greater than that with Angle Ⅱ 1;the lower intercanine dental arch width of the subjects with Angle Ⅱ 2 was narrower than that of the control groups.The interpremolar width of the subjects with Angle Ⅱ 2 was smaller than that with normal occlusion,but had no difference with Angle Ⅱ 1.There was no difference in intermolar dental and alveolar width both in maxillary and mandible molars among the 3 groups.CONCLUSION:Compared with normal occlusion,Angle Ⅱ 2 malocclusion has narrow width in upper premolars and mandibular intercaninen.In clinical treatment,the three-dimensional direction of the mandible should be balanced.
Keywords：Angle Ⅱ 2 malocclusionalveolar and dental arch widthsindividual normal occlusionAngle Ⅱ 1 malocclusion
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 41-44,52 )