CBCT与RVG对下颌恒切牙根管形态评估的对比研究

发布时间：2018-03-14 04:14

本文选题：锥形束CT　切入点：数字化X线成像法　出处：《口腔医学研究》2017年01期 　论文类型：期刊论文

【摘要】：目的:对比CBCT法与数字化X线成像法(RVG)对下颌恒切牙根管形态评估的差异。方法:对101颗离体牙进行唇舌向及近远中向数字化X线片拍摄和CBCT高清牙列模式扫描,对图像进行根管数目、Vertucci根管分型、根管钙化和根尖口开口位置的评估,并通过CBCT图像建立偏角度投照的三角函数模型,计算偏向投照的角度。结果:CBCT法显示有30颗为双根管,RVG近远中向投照显示有36颗为双根管,卡方检验显示对根管数目和Vertucci根管分型两种方法均具有显著性差异(P0.05)。两种方法对根管钙化和根尖口开口位置的评估均不具有显著性差异。30颗双根管牙中下颌恒切牙唇舌向双根管的最大距离(LaL)在0~1.5 mm之间的,85.7%的为Vertucci III型,LaL在1.5~2mm之间的,66.7%为Vertucci IV和V型。以根尖片上双根管显示距离为1mm计算,LaL在1~2mm之间的,偏向投照角度为26.6°~45.0°,LaL在0.1~1mm之间的,偏向投照角度为45.0°~84.3°。结论:CBCT高清牙列模式扫描和RVG投照对于根管数目和Vertucci根管分型的评估具有显著性差异,对于根管钙化和根尖口开口位置的评估不具有显著性差异。LaL在1~2 mm之间时,偏角度投照的临床可操作性较强。
[Abstract]:Objective: to compare the difference between CBCT and digital radiography in evaluating the root canal morphology of mandibular incisors. Methods: 101 isolated teeth were scanned by digital radiography and CBCT high-definition dentition mode. The root canal classification, root canal calcification and the location of the apical orifice were evaluated. The trigonometric function model of biased angle projection was established by CBCT image. Results 30 of 30 RVG were shown to be double root canal RVG and 36 of them were double root canals. Chi-square test showed that there were significant differences in the number of root canals and the classification of Vertucci root canals. There was no significant difference between the two methods in evaluating the calcification of root canals and the location of apical orifice. There was no significant difference between the two methods in evaluating the permanent mandibular incisors in 30 double root canals. The maximum distance to double root canal of lip and tongue was 85.7% in the range of 0 ~ 1.5 mm. Vertucci IV and V type were found in 66.7% of the cases with Vertucci III type Lal between 1.5 mm and 2 mm. The distance of the two root canals on the apical film was 1 mm and the distance between Lal and Lal was 12 mm. The biased projection angle was 26.6 掳/ 45.0 掳/ L and the bias angle was 45.0 掳/ 84.3 掳respectively. Conclusion there is significant difference in the number of root canals and the classification of Vertucci root canal by RVG and high-definition dentition mode scanning. There was no significant difference in the assessment of root canal calcification and the location of apical orifice. When Lal was between 1mm and 2mm, the clinical maneuverability of angle projection was stronger.
【作者单位】：南京大学医学院附属口腔医院预防口腔科;南京大学医学院附属口腔医院口腔颌面医学影像科;
【基金】：江苏省自然科学基金(编号:BK20150089,BK20141083) 南京市医学科技发展项目(编号:ZKX14049,YKK15116) 南京市卫生青年人才(编号:QRX11264)
【分类号】：R781.05

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