Customized maxillary incisor position relative to dentoskeletal and soft tissue patterns in Chinese women: A retrospective study
Zhou Xueman, Zheng Yingcheng, Zhang Zhenzhen, Zhang Zihan, Wu Lina, Liu Jiaqi, Yang Wenke, Wang Jun,
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( Zhou Xueman ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Zheng Yingcheng ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Zhang Zhenzhen ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Zhang Zihan ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Wu Lina ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Liu Jiaqi ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Yang Wenke ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
( Wang Jun ) - Sichuan University West China Hospital of Stomatology Department of Orthodontics
Abstract
Objective: To provide reliable prediction models based on dentoskeletal and soft tissue variables for customizing maxillary incisor positions and to optimize digitalized orthodontic treatment planning.
Methods: This study included 244 Chinese women (age, 18?40 years old) with esthetic profiles after orthodontic treatment with fixed appliances (133 in group I: 1° ≤ The angle between the nasion [N]-A point [A] plane and the N-B point [B] plane [ANB] ≤ 4°; 111 in group II: 4° < ANB ≤ 7°). Dental, skeletal, and soft tissue measurements were performed on lateral cephalograms of the participants. Correlation and multiple linear regression analyses were used to determine the influence of dentoskeletal and soft tissue variables on maxillary incisor position.
Results: The ideal anteroposterior position of the maxillary incisor varied between sagittal skeletal patterns. The position of the maxillary incisor correlated with the sagittal discrepancy between the maxilla and the mandible (ANB), protrusion of the midface, nasal tip projection, development of the chin, and inclination of both the maxillary and mandibular incisors. Distance from the maxillary central incisor to nasion-pogonion plane predicted using multiple linear regression analysis was accurate and could be a practical measurement in orthodontic treatment planning.
Conclusions: Instead of using an average value or norm, orthodontists should customize a patient’s ideal maxillary incisor position using dentoskeletal and soft tissue evaluations.
키워드
Customized maxillary incisor position; Dentoskeletal and soft tissue patterns; Cephalometrics; Mathematical approach
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