华西口腔医学杂志2012，Vol.30Issue(6)：650-654,5.DOI:10.3969/j.issn.1000-1182.2012.06.021
下颌后退术后舌骨、舌体位置和咽腔间隙变化的锥形束CT分析
Detection to changes in hyoid and tongue positions, and pharyngeal airway following mandibular setback surgery by cone beam CT
王宏伟 1齐素青 1王建国 2蔡智芳 2李创3
作者信息
- 1. 邢台市眼科医院正畸科,邢台054001
- 2. 天津市口腔医院 正畸科,天津300041
- 3. 石家庄市第二医院 口腔科,石家庄050051
- 折叠
摘要
Abstract
Objective To observe changes in tongue and hyoid position, and pharyngeal airway in patients with skeletal class Ⅲ malocclusion after the combined orthodontic and orthognathic treatment. Methods Twenty patients were involved in this study. Cone beam CT (CBCT) was performed on patients one week before and six months after treatment. Raw data were reconstructed into three-dimensional model. To set up a three-dimensional reference frame, which was based by point "S", the sagittal and transversal measurements, cross sectional areas, partial and total volumes were computed. The three-dimensional position changes of chin, hyoid bone and tongue were measured in order to analyze the amount of mandibular setback relationship with the changes of pharyngeal airway, hyoid bone and tongue positions. Results After treatment, the pharyngeal airway was constricted significantly. The hyoid significantly moved inferoposteriorly by 5.72 mm (backward) and 2.76 mm (downward) and the tongue moved posteriorly by 4.04 mm after surgery (P〈0.05). Among the 19 correlated indexes between the amount of mandibular setback and other measurements, 14 of which were significantly correlated (P〈0.05). The strongest correlation was found between the amount of mandibular setback and total volumes of pharyngeal airway (r=0.834, P〈0.01). Conclusion Following combination therapy, the pharyngeal airway space decreased, the hyoid moved inferoposteriorly and tongue moved posteriorly. There were great correlations between the amount of mandibular setback and the changes.关键词
正畸-正颌联合治疗/骨性Ⅲ类错(牙合)畸形/咽腔/锥形束CTKey words
combined orthodontic and orthognathic treatment/ skeletal class Ⅲ malocclusion/ pharyngeal airway/ cone beam CT分类
医药卫生引用本文复制引用
王宏伟,齐素青,王建国,蔡智芳,李创..下颌后退术后舌骨、舌体位置和咽腔间隙变化的锥形束CT分析[J].华西口腔医学杂志,2012,30(6):650-654,5.
