Surgical vs nonsurgical treatments in patients with anterior open-bite have similar effects in occlusal function: a 2-year follow-up study

Authors

Joongoo Lee, Department of Orthodontics, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, South Korea
Yoon Jeong Choi, Department of Orthodontics, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, South Korea
Jae Hyun Park, Arizona School of Dentistry and Oral Health
Chooryung J. Chung, Department of Orthodontics, Gangnam Severance Dental Hospital, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, South Korea
Ji-Hyun Lee, Department of Orthodontics, Gangnam Severance Dental Hospital, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, South Korea
Kyung-Ho Kim, Department of Orthodontics, Gangnam Severance Dental Hospital, The Institute of Craniofacial Deformity, Yonsei University College of Dentistry, Seoul, South Korea

Document Type

Article

Publication Title

American Journal of Orthodontics and Dentofacial Orthopedics

Abstract

Introduction

This study aimed to investigate changes in bite force (BF) and occlusal contact area after anterior open-bite (AOB) treatment and compare the changes in surgical vs nonsurgical treatment.

Methods

This retrospective study included patients with AOB compared with normal occlusion. AOB was corrected by either intrusion of the maxillary molars (intrusion group, n = 19) or orthognathic surgery (surgery group, n = 37). The control group (n = 35) had a normal overbite relationship. Records of lateral cephalograms, BF, and occlusal contact area taken before (T0), immediately after (T1), and 2 years after (T2) orthodontic treatment were compared within and among the 3 groups.

Results

The open-bite group, including intrusion and surgery groups, had a lower BF and less occlusal contact area than the control group at T0 and T1 (P <0.001). However, there were no significant differences among the 3 groups at T2 (P >0.05). The intrusion and surgery groups showed no significant differences throughout the observation period extending from T0 to T2 (P >0.05). Although BF and occlusal contact area decreased at T1 compared with T0, they increased during retention and showed higher values at T2 than at T0.

Conclusions

Treatment of AOB improved BF and occlusal contact area 2 years posttreatment. Orthognathic surgery and molar intrusion using orthodontic miniscrews can improve occlusal function similarly. Orthodontists can select either method depending on malocclusion severity and patient demand.

First Page

38

Last Page

45

DOI

10.1016/j.ajodo.2023.06.024

Publication Date

1-2024

Comments

Lee, J., Choi, Y. J., Park, J. H., Chung, C. J., Lee, J., & Kim, K. (2024). Surgical vs nonsurgical treatments in patients with anterior open-bite have similar effects in occlusal function: A 2-year follow-up study. American Journal of Orthodontics and Dentofacial Orthopedics, 165(1), 38-45. https://doi.org/10.1016/j.ajodo.2023.06.024

Accepted Version

12 Month embargo, Must link to publisher version with DOI, Published source must be acknowledged with citation

Recommended Citation

Lee, J., Choi, Y. J., Park, J. H., Chung, C. J., Lee, J., & Kim, K. (2024). Surgical vs nonsurgical treatments in patients with anterior open-bite have similar effects in occlusal function: A 2-year follow-up study. American Journal of Orthodontics and Dentofacial Orthopedics, 165(1), 38-45. https://doi.org/10.1016/j.ajodo.2023.06.024