Original Articles of Lingual Orthodontics
A retrospective study of adults with severe bimaxillary protrusion treated with customized lingual orthodontics in
Lingjun Yuan, Jiaqiang Liu, Lixia Mao, Zhi Yang, Bing Fang
Published 2018-06-20
Cite as Chin J Orthod, 2018, 25(2): 68-74. DOI: 10.3760/cma.j.issn.1674-5760.2018.02.003
Abstract
ObjectiveObjective To evaluate the treatment approach including 3D digital setup and eBrace customized lingual system, extraction pattern and anchorage design in adults with bimaxillary protrusion.
MethodsFifteen Class I adults (1 men, 14 women; age, 25.5±3.1 years) treated with four first premolar extraction were included. Palatal miniscrews and transpalatal arch combined with customized lingual appliance were used. Lateral cephalometric radiographs and CBCT were obtained before and after treatment. The superimpositions of CBCT images were analyzed three-dimensionally for tooth position change.
ResultsCephalometric analysis showed the upper and lower incisors were retracted by 7.5 mm and 6.3 mm, respectively. The average value of UI-SN decreased (-13.2±5.2). Upper and lower lips were retracted by 4.0 mm and 6.3 mm, respectively. Mean point was retracted 1.2 mm. CBCT also showed significant retraction of incisor and canine crowns. Three-dimensional position change of maxillary molars showed no significant differences.
ConclusionsThis study developed an approach of customized lingual orthodontics with the use of a customized transpalatal arch and anchorage design, which can be an effective modality for adults with severe bimaxillary protrusion.
Key words:
Customized lingual orthodontics; Severe bimaxillary protrusion; extraction; Temporary anchorage device; 3D analysis
Contributor Information
Lingjun Yuan
Department of Orthodontics, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
Shanghai key laboratory of stmatology and Shang hai Research Institute of Stomatology
National clinical Research center of Stomatology
Jiaqiang Liu
Department of Oral &
Cranio-maxillofacial Science, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
Lixia Mao
Department of Oral &
Cranio-maxillofacial Science, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
Zhi Yang
Department of Oral &
Cranio-maxillofacial Science, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
Bing Fang
Department of Orthodontics, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China
Shanghai key laboratory of stmatology and Shang hai Research Institute of Stomatology
National clinical Research center of Stomatology
