Int J Stomatol

Inter J Stomatol ›› 2013, Vol. 40 ›› Issue (2): 156-159.doi: 10.7518/gjkq.2013.02.005

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The characteristics of the anterior arch form of skeletal Class Ⅲ malocclusion

Tian Jing 1 , Gao Hui 2 , Liu Ying 1 , Sun Liuzhen 3 , Xiao Danna 2 .   

  1. 1. Graduate School of Tianjin Medical University, Tianjin 300020, China; 2. Dept. of Orthodontics, Tianjin Stomatological Hospital, Tianjin 300020, China; 3. Dept. of Orthodontics, The Sixth People’s Hospital of Anyang in Henan Province, Anyang 455000, China
  • Received:2012-10-12 Revised:2012-12-11 Online:2013-03-01 Published:2013-03-01
  • Contact: Gao Hui ， Tel： 18920220801

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Abstract:

Objective To study the characteristics of the anterior dental arch form of skeletal Class Ⅲ malocclusion and provide references for diagnosis and treatment plan. Methods Experimental group consists 52 cases of skeletal Class Ⅲ malocclusion and control group consists 63 cases of individual normal occlusion. Cone beam computed tomography（CBCT） scans of samples were taken and were used to measure with anterior dental arch of 9 measurements through Mimics 10.01. Results Compared with control group, maxillary anterior segments of the dental arch widths and depths have the tendency of decrease, maxillary anterior segments of the dental arch angles are smaller in skeletal Class Ⅲ malocclusion. Mandibular anterior dental arch are similar in two groups about widths, depths and angles. Differences between maxillary and mandibular canine widths and canine depths are smaller with skeletal Class Ⅲ malocclusion. And differences between maxillary and mandibular anterior segment angles are also smaller with skeletal Class Ⅲ malocclusion. Conclusion In skeletal Class Ⅲ malocclusion, the incoordination performance existed in the anterior dental arch form of maxillary and mandibular. The fullness of anterior dental arch form are inadequate. And the maxillary anterior dental arch widths and depths are insufficient

Key words: anterior arch form, arch width, arch depth, skeletal Class Ⅲ malocclusion, cone beam computed tomography


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