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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X
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Original Article

Korean J Orthod 2022; 52(6): 387-398   https://doi.org/10.4041/kjod22.009

First Published Date September 30, 2022, Publication Date November 25, 2022

Copyright © The Korean Association of Orthodontists.

Clinical effects of different prescriptions on the inclination of maxillary and mandibular incisors by using passive self-ligating brackets

Fabio Savoldia , Linda Sangallib, Luis T. Huanca Ghislanzonic, Domenico Dalessandrid, Min Gua , Gualtiero Mandellid, Corrado Paganellid

aDivision of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
bDivision of Orofacial Pain, College of Dentistry, University of Kentucky, Lexington, KY, USA
cDepartment of Orthodontics, University of Geneva, Geneva, Switzerland
dOrthodontics, Dental School, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy

Correspondence to:Min Gu.
Clinical Assistant Professor, Orthodontics, 2/F, Prince Philip Dental Hospital, 34 Hospital Road, Sai Ying Pun, Hong Kong SAR.
Tel +852-2859-0258 e-mail drgumin@hku.hk

How to cite this article: Savoldi F, Sangalli L, Huanca Ghislanzoni LT, Dalessandri D, Gu M, Mandelli G, Paganelli C. Clinical effects of different prescriptions on the inclination of maxillary and mandibular incisors by using passive self-ligating brackets. Korean J Orthod 2022;52(6):387-398. https://doi.org/10.4041/kjod22.009

Received: January 13, 2022; Revised: May 18, 2022; Accepted: May 25, 2022

Abstract

Objective: Controlling the incisal inclination is fundamental in orthodontics. However, the relationship between the inclination prescription and its clinical outcome is not obvious, and the incisal inclination changes generated by different bracket prescriptions were investigated. Methods: Twenty-eight non-extraction dental Class II patients (15 females, 13 males; mean age = 12.9) were retrospectively analyzed. Patients were treated using passive self-ligating fixed appliances with three inclination prescriptions for maxillary incisors (high, standard, low), and two for mandibular incisors (standard, low). Clinical outcomes were compared among different prescriptions, and regression analysis was used to explain the effects of bracket prescriptions and to understand the prescription selection criteria (α = 0.05). Results: For maxillary central incisors, low and high prescriptions were related to linguoversion (p = 0.046) and labioversion (p = 0.005), respectively, while standard prescription maintained the initial dental inclination. Maxillary lateral incisors did not show significant changes. For mandibular incisors, low prescription led to linguoversion (p = 0.005 for central incisors, p = 0.010 for lateral incisors), while standard prescription led to labioversion (p = 0.045 for central incisors, p = 0.005 for lateral incisors). The factors affecting inclination changes were the imposed change and selected prescription, while prescription selection was influenced by the initial dental inclination and initial intercanine distance. Conclusions: The direction of correction of incisal inclination can be controlled by choosing a certain prescription, but the final inclination may show limited consistency with it. The amount of imposed inclination change was the most relevant predictor of the clinical outcome.

Keywords: Digital models, Tooth movement, Incisor, Orthodontic brackets

Article

Original Article

Korean J Orthod 2022; 52(6): 387-398   https://doi.org/10.4041/kjod22.009

First Published Date September 30, 2022, Publication Date November 25, 2022

Copyright © The Korean Association of Orthodontists.

Clinical effects of different prescriptions on the inclination of maxillary and mandibular incisors by using passive self-ligating brackets

Fabio Savoldia , Linda Sangallib, Luis T. Huanca Ghislanzonic, Domenico Dalessandrid, Min Gua , Gualtiero Mandellid, Corrado Paganellid

aDivision of Paediatric Dentistry and Orthodontics, Faculty of Dentistry, The University of Hong Kong, Hong Kong SAR
bDivision of Orofacial Pain, College of Dentistry, University of Kentucky, Lexington, KY, USA
cDepartment of Orthodontics, University of Geneva, Geneva, Switzerland
dOrthodontics, Dental School, Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, Brescia, Italy

Correspondence to:Min Gu.
Clinical Assistant Professor, Orthodontics, 2/F, Prince Philip Dental Hospital, 34 Hospital Road, Sai Ying Pun, Hong Kong SAR.
Tel +852-2859-0258 e-mail drgumin@hku.hk

How to cite this article: Savoldi F, Sangalli L, Huanca Ghislanzoni LT, Dalessandri D, Gu M, Mandelli G, Paganelli C. Clinical effects of different prescriptions on the inclination of maxillary and mandibular incisors by using passive self-ligating brackets. Korean J Orthod 2022;52(6):387-398. https://doi.org/10.4041/kjod22.009

Received: January 13, 2022; Revised: May 18, 2022; Accepted: May 25, 2022

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: Controlling the incisal inclination is fundamental in orthodontics. However, the relationship between the inclination prescription and its clinical outcome is not obvious, and the incisal inclination changes generated by different bracket prescriptions were investigated. Methods: Twenty-eight non-extraction dental Class II patients (15 females, 13 males; mean age = 12.9) were retrospectively analyzed. Patients were treated using passive self-ligating fixed appliances with three inclination prescriptions for maxillary incisors (high, standard, low), and two for mandibular incisors (standard, low). Clinical outcomes were compared among different prescriptions, and regression analysis was used to explain the effects of bracket prescriptions and to understand the prescription selection criteria (α = 0.05). Results: For maxillary central incisors, low and high prescriptions were related to linguoversion (p = 0.046) and labioversion (p = 0.005), respectively, while standard prescription maintained the initial dental inclination. Maxillary lateral incisors did not show significant changes. For mandibular incisors, low prescription led to linguoversion (p = 0.005 for central incisors, p = 0.010 for lateral incisors), while standard prescription led to labioversion (p = 0.045 for central incisors, p = 0.005 for lateral incisors). The factors affecting inclination changes were the imposed change and selected prescription, while prescription selection was influenced by the initial dental inclination and initial intercanine distance. Conclusions: The direction of correction of incisal inclination can be controlled by choosing a certain prescription, but the final inclination may show limited consistency with it. The amount of imposed inclination change was the most relevant predictor of the clinical outcome.

Keywords: Digital models, Tooth movement, Incisor, Orthodontic brackets