University of Oulu

Moon, C., Sándor, G. K., Ko, E. C., & Kim, Y.-D. (2021). Postoperative Stability of Patients Undergoing Orthognathic Surgery with Orthodontic Treatment Using Clear Aligners: A Preliminary Study. Applied Sciences, 11(23), 11216. doi:10.3390/app112311216

Postoperative stability of patients undergoing orthognathic surgery with orthodontic treatment using clear aligners : a preliminary study

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Author: Moon, Chiho1,2,3; Sándor, George K.4; Ko, Edward Chengchuan5;
Organizations: 1Department of Oral and Maxillofacial Surgery, School of Dentistry, Pusan National University, Geumo-ro 20, Mulgeum, Yangsan 50612, Korea
2Dental and Life Science Institute, School of Dentistry, Pusan National University, Yangsan 50612, Korea
3Dental Research Instutite, Pusan National University Dental Hospital, Yangsan 50612, Korea
4Department of Oral and Maxillofacial Surgery, Oulu University Hospital, University of Oulu, 90220 Oulu, Finland
5Department of Oral and Maxillofacial Surgery, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 6.8 MB)
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Language: English
Published: Multidisciplinary Digital Publishing Institute, 2021
Publish Date: 2021-12-07


Background/Objectives: Until now, there have been many studies on the postoperative stability of orthognathic patients treated with traditional fixed orthodontic appliances. Recently, the use of clear aligners as orthodontic appliances has increased in orthodontic treatment for aesthetic and patient convenience. The aim of this preliminary study was to investigate the stability and characteristics of patients undergoing orthognathic surgery using clear aligners.

Patients and methods: This study was performed on patients who underwent orthognathic surgery by one surgeon at Pusan National University Dental Hospital from April 2017 to August 2021. A comparative study was conducted on five patients treated with clear aligners during orthodontic treatment and ten patients treated with traditional fixed appliances as a control group. Postoperative skeletal changes and recurrence were evaluated by cone beam computed tomography and lateral cephalometric radiographs taken two days postoperatively and six months postoperatively. Several measurement variables were used to confirm the presence or absence of recurrence, preoperative and postoperative orthodontic treatment period, and the number of extracted teeth.

Results: Postoperative stability for six months after surgery was not significantly different between the clear aligner group and the traditional fixed appliance group. The preoperative orthodontic treatment period was also shorter in the clear aligner group, and the number of extracted premolar teeth and impacted teeth were also fewer in the clear aligner group, but there was no significant difference.

Conclusions: Orthodontic treatment using clear aligners continues to develop, and it is believed that there is no limit to what can be accomplished during orthodontic surgery accompanied by clear aligners.

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Series: Applied sciences
ISSN: 2076-3417
ISSN-E: 2076-3417
ISSN-L: 2076-3417
Volume: 11
Issue: 23
Article number: 11216
DOI: 10.3390/app112311216
Type of Publication: A1 Journal article – refereed
Field of Science: 313 Dentistry
Copyright information: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (