摘要
背景:牙根在牙槽骨的位置及周围骨板厚度影响着口腔治疗,治疗过程中如果对牙齿控制不当可造成医源性并发症。以往对颌骨的研究主要针对解剖学、骨厚度或骨密度,对于牙根在牙槽骨内的空间位置及其与周围骨骼的关系,研究关注较少。目的:建立颌骨的数字化计算机三维模型,测量牙根的唇舌侧牙槽骨厚度。方法:选择牙列完整无明显骨骼吸收的年轻成人70例,采用牙科专用锥形束CT机进行颌面部扫描,将扫描中采集的容积信息传入计算机工作站,以及冠状位或矢状位多平面重建,获得高质量的重建图像,原始数据以DICOM格式导入计算机,并输出到整合的3D设计软件Invivo5软件进行测量。结果与结论:重建的颌骨数字化模型可从多平面进行观察及测量,实验测得70例患者各个牙根唇舌侧牙槽骨厚度的均值:上下前牙舌侧牙槽骨厚度大于唇侧(P<0.05);除上前磨牙的牙颈部唇侧牙槽骨较厚外,其他前磨牙舌侧牙槽骨厚度大于唇侧(P<0.05);上磨牙和下颌第一磨牙唇舌侧牙槽骨厚度接近,下第二磨牙唇侧牙槽骨厚度大于舌侧(P<0.01)。结果证实,成人不同牙位的唇舌侧牙槽骨厚度差异较大。
BACKGROUND： Oral treatment is affected by the root position and the surrounding bone plate thickness of the alveolar bone, and the improper teeth control can cause iatrogenic complications. The scholars have conducted the research about the jaw, such as anatomical observation, bone thickness or bone density. However, the research regarding the spatial position of the root within the alveolar bone and its relationship with the surrounding bone is less of a concern. OBJECTIVE： To establish a digital three-dimensional computer model of the jaw, and then to measure the thickness of labial and lingual alveolar bone around the tooth root, providing a reference for orthodontic tooth movement design and tooth extraction. METHODS： A total of 70 young adult orthodontic patients were selected with complete dentition and with no bone absorption shown on panoramic radiographs. The maxillofacial region was scanned using dental cone beam CT machine. Collected data were input into a computer workstation to implement coronal or sagittal multi-planar reconstruction with high-resolution three-dimensional images, and then raw data at DICOM format were outputted to the integrated three-dimensional design software, Invivo5 software, for measurement. RESULTS AND CONCLUSION： The digital and virtual reconstruction model of the jaw could be observed and measured from the multi-plane, and the mean alveolar thickness was measured with every root in 70 patients. The mean lingual alveolar bone thickness of anterior tooth was thicker than the labial （P 〈 0.05）. Besides the dental cervix of upper premolars, the mean lingual alveolar bone thickness of premolars was thicker than the labial （P 〈 0.05）. There were no differences when the bilateral measurements were compared for upper molars and mandibular first molar （P 〉 0.05）, but a significant difference between labial alveolar bone and lingual alveolar bone was noted in the mandibular second molar （P 〈 0.01 ）. The results confirmed that the significant difference
出处
《中国组织工程研究》
CAS
CSCD
2013年第15期2714-2722,共9页
Chinese Journal of Tissue Engineering Research
关键词
组织构建
口腔组织构建
锥形束CT
牙根
牙槽骨
舌侧
颊侧
厚度
正畸牙齿移动
拔牙
牙折
tissue construction
oral tissue construction
cone-beam CT
root of tooth
alveolar bone
lingual
buccal
thickness
orthodontics
tooth movement
tooth extraction
tooth fracture
