摘要
目的:通过CT成像技术定量研究骨性Ⅲ类错患者下颌前部牙槽骨形态结构特征,为深入了解骨性Ⅲ类错畸形的牙特征、进而制定科学的矫治方案提供参考。方法:选取处于青春后期骨性Ⅲ类错患者25例,运用三维螺旋CT扫描,测量下前牙区骨皮质、骨松质的唇舌侧厚度,分析下前牙牙根周围的骨质情况及解剖学关系。结果:骨性Ⅲ类错下前牙区左右同名牙位骨质厚度基本对称,唇侧小于舌侧,顺根尖方向呈逐渐增厚趋势。下前牙区松质骨厚度不均匀,切1/2区域多见缺如。结论:牙与牙槽骨的同步代偿是骨性Ⅲ类错牙生理性代偿的重要特征。下前牙牙根唇侧颈1/3对应牙槽骨及根尖部区域,可能是发生正畸源性骨开窗、干裂的敏感区域。
Objective To study the mandibular anterior alveolar morphological characteristics of skeletal ClassⅢmalocclusion patients by CT quantitative research , which can provide guidances and indications for clinical skeletal Class Ⅲmalocclusion treatment and prevent iatrogenic complications , such as rootabsorption. Method 25 skeletal Class Ⅲ malocclusion patients during thepostpubertal were selected , three-dimensionalspiralCTscanning was applied to measure cortical and cancellousbonethickness around 6 mandibular incisors for analyzing the relationship between the bone mass and its anatomyaround the mandibular incisors roots. Results （1） The bone thickness around the lower anterior homonym teeth was basically symmetric in the skeletal Class III malocclusion. The labial thickness is a little less than the lingual side , gradually thickening along the root apical direction; （2） The area of mandibular incisors was inhomogeneous , and the 1/2 regional cancellous bone thickness of mandibular incisors was often lacked. Conclusion （1） The synchronous compensation of the teeth and alveolar bone is the significant feature of the skeletal Class Ⅲ malocclusion. （2） The responding regions ofthe alveolar bone in the 1/3 labial-cervical and root-tip may be the sensitive areas during the orthodontic treatment.
出处
《实用医学杂志》
CAS
北大核心
2015年第9期1478-1481,共4页
The Journal of Practical Medicine
基金
贵州省卫生厅科技基金项目(编号:gzwkj2012-1-002)
贵州省科技计划课题(编号:黔科合SY字[2013]3040号)
贵州省优秀科技教育人才省长专项资金项目(编号:黔省专合字2010 83号)
关键词
骨性安氏Ⅲ类错
下颌切牙
牙槽骨
CT
CT
Skeletal classⅢmalocclusion
Mandibular incisor
Alveolar bone
CT
作者简介
通信作者：贾莹 E-mail：jiayingmed218@189．cn
