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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X
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Korean J Orthod

Published online November 15, 2021

Copyright © The Korean Association of Orthodontists.

Customized maxillary incisor position of Chinese females relative to dentoskeletal and soft tissue pattern: a retrospective study

Xueman Zhou1†, Yingcheng Zheng1†, Zhenzhen Zhang1, Zihan Zhang1, Lina Wu1, Jiaqi Liu1, Wenke Yang1, Jun Wang1*

1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China

Correspondence to:Jun Wang,
Professor
Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No.14, 3rd section, Renmin South Road, Chengdu, China, 610041
Tel: +86 18628146916
Fax: +86 028 8550 1425
E-mail: wangjunv@scu.edu.cn
ORCID: 0000-0002-9040-6295

These authors should be considered joint first author.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: To provide reliable prediction models based on dentoskeletal and soft tissue variables for upper incisor position customizations and to optimize digitalized orthodontic treatment planning.
Methods: A total of 244 Chinese female adults (18-40 years old) with esthetic profile after orthodontic treatment with fixed appliances were included (133 in group I: 1° ≤ ANB ≤ 4°, 111 in group II: 4° < ANB ≤ 7°). Dental, skeletal and soft tissue measurements were performed on lateral cephalograms of subjects. Correlations and multiple linear regression analyses were used to determine the influence of dentoskeletal and soft tissue variables on the upper incisor position.
Results: The ideal anteroposterior position of the upper incisor varies between sagittal skeletal patterns. The position of the upper incisor was correlated with the sagittal discrepancy between the maxilla and mandible (angle ANB), the protrusion of midface (A-Np), nasal tip projection (Prn-Sn vert), the development of the chin (Pog-Np), and the inclination of both the upper and lower incisors. U1-NPog (distance) prediction accomplished by multiple linear regression analysis is accurate and may be practical in orthodontic treatment planning.
Conclusions: Instead of using an average value or norm, orthodontists should customize a patient’s ideal upper incisor position based on dentoskeletal and soft tissue evaluation.

Keywords: Customized upper incisor position, Dentoskeletal and soft tissue pattern, Cephalometrics, Mathematical approach

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Korean J Orthod

Published online November 15, 2021

Copyright © The Korean Association of Orthodontists.

Customized maxillary incisor position of Chinese females relative to dentoskeletal and soft tissue pattern: a retrospective study

Xueman Zhou1†, Yingcheng Zheng1†, Zhenzhen Zhang1, Zihan Zhang1, Lina Wu1, Jiaqi Liu1, Wenke Yang1, Jun Wang1*

1 State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, China

Correspondence to:Jun Wang,
Professor
Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, No.14, 3rd section, Renmin South Road, Chengdu, China, 610041
Tel: +86 18628146916
Fax: +86 028 8550 1425
E-mail: wangjunv@scu.edu.cn
ORCID: 0000-0002-9040-6295

These authors should be considered joint first author.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Objective: To provide reliable prediction models based on dentoskeletal and soft tissue variables for upper incisor position customizations and to optimize digitalized orthodontic treatment planning.
Methods: A total of 244 Chinese female adults (18-40 years old) with esthetic profile after orthodontic treatment with fixed appliances were included (133 in group I: 1° ≤ ANB ≤ 4°, 111 in group II: 4° < ANB ≤ 7°). Dental, skeletal and soft tissue measurements were performed on lateral cephalograms of subjects. Correlations and multiple linear regression analyses were used to determine the influence of dentoskeletal and soft tissue variables on the upper incisor position.
Results: The ideal anteroposterior position of the upper incisor varies between sagittal skeletal patterns. The position of the upper incisor was correlated with the sagittal discrepancy between the maxilla and mandible (angle ANB), the protrusion of midface (A-Np), nasal tip projection (Prn-Sn vert), the development of the chin (Pog-Np), and the inclination of both the upper and lower incisors. U1-NPog (distance) prediction accomplished by multiple linear regression analysis is accurate and may be practical in orthodontic treatment planning.
Conclusions: Instead of using an average value or norm, orthodontists should customize a patient’s ideal upper incisor position based on dentoskeletal and soft tissue evaluation.

Keywords: Customized upper incisor position, Dentoskeletal and soft tissue pattern, Cephalometrics, Mathematical approach