[Analysis and comparison of dental arch symmetry between different Angle's malocclusion categories and normal occlusion]

Full Abstract

OBJECTIVE: To analyze and compare dental arch symmetry between different Angle's malocclusion categories and normal occlusion. METHODS: 300 subjects were divided into four different malocclusion groups and normal occlusion group. Data points representing the dental arches on the casts were precisely marked by YM-2115 three Dimension Measuring Machine. Arch forms were fitted with conic sections, and then dental arch symmetry was analyzed by rotation angle. RESULTS: There were no absolute symmetric dental arch, and the direction of asymmetry was unsteady. In normal occlusion, dental arch was generally symmetric, but there was asymmetry in a very small degree. As to malocclusion, the frequency and degree of dental arch asymmetry were higher than that of normal occlusion, and the lower arch showed more asymmetry than the upper arch except ClassIII. The frequency of asymmetry in ClassII2 and ClassIII groups was higher than that in other malocclusion groups. CONCLUSION: The frequency and degree of dental arch asymmetry were different in different malocclusion groups.

Author information

Author/s: Nie, Q (Q); Lin, J (J);

Affiliation: Department of Orthodontics, School of Stomatology, Beijing Medical University, Beijing 100081, China.

Journal and publication information

Publication Type: Comparative Study; English Abstract; Journal Article

Journal: Zhonghua kou qiang yi xue za zhi = Zhonghua kouqiang yixue zazhi = Chinese journal of stomatology (Zhonghua Kou Qiang Yi Xue Za Zhi), published in China. (Language: chi)

Reference: 2000-Mar; vol 35 (issue 2) : pp 105-7

Dates: Created 2002/01/08; Completed 2002/03/06; Revised 2006/11/15;

PMID: 11780475, status: MEDLINE (last retrieval date: 2/18/2009, IMS Date: )

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