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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.
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
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
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.
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
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
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