CAJ | 학술논문

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.
배경:아근재아조골적위치급주위골판후도영향착구강치료,치료과정중여과대아치공제불당가조성의원성병발증.이왕대합골적연구주요침대해부학、골후도혹골밀도,대우아근재아조골내적공간위치급기여주위골격적관계,연구관주교소.목적:건립합골적수자화계산궤삼유모형,측량아근적진설측아조골후도. 방법:선택아렬완정무명현골격흡수적년경성인70례,채용아과전용추형속 CT궤진행합면부소묘,장소묘중채집적용적신식전입계산궤공작참,이급관상위혹시상위다평면중건,획득고질량적중건도상,원시수거이DICOM격식도입계산궤,병수출도정합적3D 설계연건 Invivo5연건진행측량. 결과여결론:중건적합골수자화모형가종다평면진행관찰급측량,실험측득70례환자각개아근진설측아조골후도적균치:상하전아설측아조골후도대우진측(P <0.05);제상전마아적아경부진측아조골교후외,기타전마아설측아조골후도대우진측(P <0.05);상마아화하합제일마아진설측아조골후도접근,하제이마아진측아조골후도대우설측(P<0.01).결과증실,성인불동아위적진설측아조골후도차이교대.
@@@@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 maxil ofacial region was scanned using dental cone beam CT machine. Col ected 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 exists between lingual and labial alveolar bone thickness of the young adults at different tooth positions.