Differences in the Mandibular Premolar Positions in Angle Class I Subjects with Different Vertical Facial Types: A Cone-beam Computed Tomography Study

Overview

Journal Korean J Orthod

Date 2015 Aug 11

PMID 26258064

Citations 2

Authors

Jun Duan

Feng Deng

Wan-Shan Li

Xue-Lei Li

Lei-Lei Zheng

Gui-Yuan Li

Yan-Jie Bai

Affiliations

Soon will be listed here.

Abstract

Objective: To compare the positions of the mandibular premolars in Angle Class I subjects according to vertical facial type. The results will provide a theoretical basis for predicting effective tooth movement in orthodontic treatment.

Methods: Cephalometric parameters were determined using cone-beam computed tomography in 120 Angle Class I subjects. Subjects were categorized as short, normal, and long face types according to the Frankfort mandibular angle. Parameters indicating the position of the mandibular right premolars and the mandible were also measured.

Results: The angle between the mandibular first premolar axis and buccal cortex, the distance between the root apex and buccal cortex, angle of vestibularization, arc of vestibularization, and root apex maximum movable distance were significantly greater in the short face type than in the long and norm face types. The angle between the mandibular second premolar axis and buccal cortex, the distance from root apex to buccal cortex, and the arc of vestibularization were significantly greater in the short face type than in the normal face type.

Conclusions: There are significant differences in the mandibular premolar positions in Class I subjects according to vertical facial type.

Citing Articles

Differences in the Buccolingual Inclinations of Premolars Among Class II Division I Subjects With Different Vertical Facial Patterns.

Barri A, Mahmoud B, Elwan A, Haffaf R, Khalil F Cureus. 2024; 16(10):e72667.

PMID: 39553121 PMC: 11568827. DOI: 10.7759/cureus.72667.

Longitudinal Quantitation of Tooth Displacement in Chinese Adolescents with Normal Occlusion.

Zhang J, Wang X, Lin J Curr Med Sci. 2019; 39(2):317-324.

PMID: 31016528 DOI: 10.1007/s11596-019-2037-z.

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