Correlation analysis of eye and lip canting correction after bimaxillary orthognathic surgery and orthodontic treatment
Year: 2025
Type: article
Study design: Observational Study
Abstract: BACKGROUND: Facial asymmetry is a frequent indication for orthognathic surgery. Vertical discrepancies such as eye and lip canting strongly influence perceived facial balance. While orthognathic surgery effectively repositions skeletal structures, the extent of soft tissue canting correction remains uncertain. METHODS: This retrospective study included 25 patients who underwent bimaxillary orthognathic surgery followed by orthodontic treatment between 2017 and 2023. Patients were classified into three groups: eye + lip canting (Group A, n = 10), Eye canting, lip canting, soft tissue chin deviation, and commissure height difference were measured using standardized frontal photographs and cephalometric radiographs at three time points: preoperative (T0), postoperative (T1), and post-debonding (T2). One-way ANOVA and Tukey's post hoc test were used. RESULTS: Orthognathic surgery significantly improved both eye and lip canting (P < 0.05). Lip canting showed greater responsiveness than eye canting. Soft tissue chin deviation and commissure height difference also demonstrated significant postoperative improvements that were maintained through the debonding stage. Minimal or no further changes occurred during orthodontic treatment. Group A demonstrated the greatest overall improvement. CONCLUSION: Bimaxillary orthognathic surgery effectively improves soft tissue canting, particularly of the in the lower face. Most correction occurs during the surgical phase, while orthodontics contributes minimally.
Authors: Haemin Kim, Dong-Woo Kim, Jaeyoung Ryu, Seunggon Jung, Hong-Ju Park, Min-Suk Kook
Institution: Chonnam National University
Language: English
Subfield: Orthodontics
Field: Dentistry
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $2,490
OpenAlex ID: W4416220688