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Maxillofacial Plastic and Reconstructive Surgery

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Open Access 01-12-2016 | Research

The effect of orthognathic surgery on the lip lines while smiling in skeletal class III patients with facial asymmetry

Authors: Sang-Hoon Kang, Moon-Key Kim, Sang-In An, Ji-Yeon Lee

Published in: Maxillofacial Plastic and Reconstructive Surgery | Issue 1/2016

Abstract

Background

The aim of this study was to examine the relationship between improvements in lip asymmetry at rest and while smiling after orthognathic surgery in patients with skeletal class III malocclusion.

Methods

This study included 21 patients with skeletal class III malocclusion and facial asymmetry. We used preoperative and postoperative CT data and photographs to measure the vertical distance of the lips when smiling. The photographs were calibrated based on these distances and the CT image. We compared preoperative and postoperative results with the t test and correlations between measurements at rest and when smiling by regression analyses.

Results

There were significant correlations between the postoperative changes in canting of the mouth corners at rest, canting of the canines, canting of the first molars, the slope of the line connecting the canines, and the slope of the line connecting first molars. The magnitude of the postoperative lip line improvement while smiling was not significantly correlated with changes in the canting and slopes of the canines, molars, and lip lines at rest.

Conclusions

It remains difficult to predict lip line changes while smiling compared with at rest after orthognathic surgery in patients with mandibular prognathism, accompanied by facial asymmetry.

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Title: The effect of orthognathic surgery on the lip lines while smiling in skeletal class III patients with facial asymmetry
Authors: Sang-Hoon Kang
Moon-Key Kim
Sang-In An
Ji-Yeon Lee
Publication date: 01-12-2016
Publisher: Springer Berlin Heidelberg
Published in: Maxillofacial Plastic and Reconstructive Surgery / Issue 1/2016
Electronic ISSN: 2288-8586
DOI: https://doi.org/10.1186/s40902-016-0065-1

At a glance: The STEP trials

Springer Medicine

The effect of orthognathic surgery on the lip lines while smiling in skeletal class III patients with facial asymmetry

Abstract

Background

Methods

Results

Conclusions

At a glance: The STEP trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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