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KJO Korean Journal of Orthodontics

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pISSN 2234-7518
eISSN 2005-372X
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Case Report

Korean J Orthod 2009; 39(4): 257-272   https://doi.org/10.4041/kjod.2009.39.4.257

First Published Date August 31, 2009, Publication Date August 30, 2009

Copyright © The Korean Association of Orthodontists.

Treatment of skeletal Class II adult patient with vertical and transverse problems caused by nasal airway obstruction using microimplant anchorage

Jong-Moon Chae, DDS, MSD, PhD, a, Na-Young Chang, DDS, MSD, bJin-Hyoung Cho, DDS, MSD, PhD, aKyung-Hwa Kang, DDS, MSD, PhD, c and Sang-Cheol Kim, DDS, MSD, PhDd

aAssistant Professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
bFellow, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
cAssociate Professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
dProfessor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
Instructor, The Korean Orthodontic Research Institute Inc., Korea.

Correspondence to: Jong-Moon Chae. Department of Orthodontics, School of Dentistry, Wonkwang University Daejeon Dental Hospital, 1268, Doonsan-dong, Seo-gu, Daejeon 302-120, Korea. +82 42 366 1130; Email: jongmoon@wonkwang.ac.kr

Received: April 29, 2009; Revised: July 9, 2009; Accepted: July 14, 2009

Abstract

This case report describes the treatment of an adult patient with a Class I canine and molar relationship but a convex profile with a retrognathic mandible and marked lip protrusion, as well as an excessive lower anterior facial height and reduced transverse width on both arches due to a nasal airway obstruction. The constricted arches were expanded by surgically-assisted rapid palatal expansion and the application of a Schwarz appliance to the maxilla and mandible. Acceptable facial balance was obtained using contemporary directional force technology with microimplant anchorage (MIA), which provided horizontal and vertical anchorage in the maxillary and mandibular posterior teeth, as well as intrusion and torque control in the maxillary anterior teeth, resulting in a favorable counterclockwise mandibular response. The total treatment period was 29 months and the results were acceptable for 13 months after debonding.

Keywords: Airway, Microimplant, Class II, Expansion

Article

Case Report

Korean J Orthod 2009; 39(4): 257-272   https://doi.org/10.4041/kjod.2009.39.4.257

First Published Date August 31, 2009, Publication Date August 30, 2009

Copyright © The Korean Association of Orthodontists.

Treatment of skeletal Class II adult patient with vertical and transverse problems caused by nasal airway obstruction using microimplant anchorage

Jong-Moon Chae, DDS, MSD, PhD, a, Na-Young Chang, DDS, MSD, bJin-Hyoung Cho, DDS, MSD, PhD, aKyung-Hwa Kang, DDS, MSD, PhD, c and Sang-Cheol Kim, DDS, MSD, PhDd

aAssistant Professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
bFellow, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
cAssociate Professor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
dProfessor, Department of Orthodontics, School of Dentistry, Wonkwang University, Korea.
Instructor, The Korean Orthodontic Research Institute Inc., Korea.

Correspondence to: Jong-Moon Chae. Department of Orthodontics, School of Dentistry, Wonkwang University Daejeon Dental Hospital, 1268, Doonsan-dong, Seo-gu, Daejeon 302-120, Korea. +82 42 366 1130; Email: jongmoon@wonkwang.ac.kr

Received: April 29, 2009; Revised: July 9, 2009; Accepted: July 14, 2009

Abstract

This case report describes the treatment of an adult patient with a Class I canine and molar relationship but a convex profile with a retrognathic mandible and marked lip protrusion, as well as an excessive lower anterior facial height and reduced transverse width on both arches due to a nasal airway obstruction. The constricted arches were expanded by surgically-assisted rapid palatal expansion and the application of a Schwarz appliance to the maxilla and mandible. Acceptable facial balance was obtained using contemporary directional force technology with microimplant anchorage (MIA), which provided horizontal and vertical anchorage in the maxillary and mandibular posterior teeth, as well as intrusion and torque control in the maxillary anterior teeth, resulting in a favorable counterclockwise mandibular response. The total treatment period was 29 months and the results were acceptable for 13 months after debonding.

Keywords: Airway, Microimplant, Class II, Expansion