- 作者：Dae-Seung Kim ; Kyung-Hoe Huh ; Sam-Sun Lee ; Min-Suk Heo ; Soon-Chul Choi ; Soon-Jung Hwang ; Won-Jin Yi
- 关键词：Three-dimensional facial morphology changes ; Three-dimensional mandibular movement changes ; Orthognathic surgery ; Height of face ; Contralateral side morphological changes
- 刊名：Journal of Cranio-Maxillofacial Surgery
- 出版年：2013
- 出版时间：October, 2013
- 年：2013
- 卷：41
- 期：7
- 页码：686-693
- 全文大小：892 K
Purpose
The purpose of this study was to investigate the relationship between changes in three-dimensional (3D) facial morphology and mandibular movement after orthognathic surgery. We hypothesized that facial morphology changes after orthognathic surgery exert effects on 3D mandibular movement.Materials and methods
We conducted a prospective follow-up study of patients who had undergone orthognathic surgical procedures. Three-dimensional facial morphological values were measured from facial CT images before and three months after orthognathic surgery. Three-dimensional maximum mandibular opening (MMO) values of four points (bilateral condylions, infradentale, and pogonion) were also measured using a mandibular movement tracking and simulation system. The predictor variables were changes in morphological parameters divided into two groups (deviated side (DS) or contralateral side (CS) groups), and the outcome variables were changes in the MMO at four points.
Results
We evaluated 21 subjects who had undergone orthognathic surgical procedures. Alterations in the TFH (total facial height), LFH (lower facial height), CS MBL (mandibular body length), and DS RL (ramus length) were negatively correlated with changes in bilateral condylar movement. The UFH, DS MBL and CS ML (mandibular length) showed correlations with infradentale movement. The CS ML, DS ML, MBL, UFH, and SNB were correlated with pogonion movement.
Conclusion
The height of the face is most likely to affect post-operative mandibular movement, and is negatively correlated with movement changes in the condyles, infradentale and pogonion. The changes in CS morphological parameters are more correlated with mandibular movement changes than the DS. The changes in CS MBL and bilateral RL were negatively correlated with condylar movement changes, while the bilateral MBL and CS ML were positively correlated with changes in infradentale and pogonion.