数字化光纤透照法判断龋洞深度
发布时间：2018-09-05 17:16
【摘要】：目的:使用DIAGNOcam系统体外研究新型数字化光纤透照法(digital imaging fiber optic transillumination,DIFOTI)判断龋洞深度的准确性。方法:实验采用自身配对设计,选取74颗有1个邻面龋、边缘嵴均未破坏的离体磨牙(66颗)和前磨牙(8颗),在龋洞所对应的鉭面边缘嵴中央做标记点,将离体牙固定在标准牙列模型内,龋洞与另一离体牙的无龋坏牙面相邻接,用黏蜡封闭至釉牙骨质界(cemento-enamel junction,CEJ)上2 mm及邻间隙(模仿牙龈缘及龈乳头),然后将标准牙列模型放入仿头模内,使用DIAGNOcam系统对离体牙进行探照检查,通过系统的探头从鉭面拍摄获取投射照片。使用DIAGNOcam系统软件测量工具,在投射照片上,从标记点起至龋损最深处长度记为a,延长a至对侧边缘嵴处的长度记为b,b为光纤透照摄取图像中牙的宽度,然后在离体牙鉭面上得到自标记点至对侧边缘嵴与光纤透照图中b平行的线为患牙的实际宽度,其长度记为c。投射照片上光纤透照所测得的龋坏深度为d,通过公式d/a=c/b(数字化光纤测得的龋坏深度/图像中龋损深度=实际牙宽度/图像中牙宽度),推导得出d=a×c/b,计算出d值。取出离体牙,去净腐质,测量实际洞深,记为D,每个样本d与D的差值记录为Δd。结果用SPSS 20.0软件进行一致性检验,并用Med Calc 14.8.1.0软件对Δd进行Bland-Altman分析。结果:d与D的相关系数(intraclass correlation coefficient,ICC)为0.951(ICC75%),P=0.263,两组数据差异无统计学意义,具有良好的一致性,且两组数据之间存在y=0.23+0.91x函数关系(x为数字化光纤透照法测得龋洞深度,y为实际龋洞深度)。Bland-Altman分析Δd显示,Δd的均值Δd_(mean)为0.05 mm,标准差Δd_(SD)=0.308,95%置信区间为(-0.55~0.65),这种相差幅度在临床上可以接受,因此可以认为两种测量方式的一致性较好。结论:使用DIAGNOcam系统体外检测牙齿龋坏深度与龋洞去腐后的实际深度基本一致,提示临床上可以使用DIAGNOcam系统来辅助评估龋洞深度。
[Abstract]:Objective: to study the accuracy of a new digital optical fiber radiography (digital imaging fiber optic transillumination,DIFOTI) system for the determination of caries depth by DIAGNOcam system in vitro. Methods: the self-matched design was used to select 74 extracted molars (66 teeth) and 8 premolars (8 premolars) with 1 adjacent caries and undamaged marginal caries, which were used as marking points in the center of the marginal ridge of tantalum surface corresponding to the caries cavity. The isolated teeth were fixed in the standard dentition model, and the cavities were adjacent to the decayed surfaces of the other teeth. Two mm and adjacent space (imitating gingival margin and gingival papilla) of enamel cementum boundary (cemento-enamel junction,CEJ) were sealed with sticky wax, then standard dentition model was put into the imitating head mold, and the isolated teeth were examined by DIAGNOcam system. The projective photos are obtained from tantalum surface by the system probe. Using the DIAGNOcam system software measurement tool, the length from the marking point to the deepest point of caries was recorded as a, and the length from a to the contralateral edge ridge was recorded as the width of the tooth in the image taken by optical fiber radiography. Then, the actual width of the affected teeth was obtained from the point of self-labeling to the line parallel to b in the optical fiber radiography, and the length of the line was recorded as c. The decayed depth measured by optical fiber radiography on the projection photo is d, and the d value is calculated by the formula d/a=c/b (the depth of caries measured by digital optical fiber / the depth of caries in the image = the width of the actual tooth / the width of the tooth in the image). The extracted teeth were removed and the actual hole depth was measured. The difference between d and D of each sample was recorded as 螖 D. Results SPSS 20.0 software was used to verify the consistency, and Med Calc 14.8.1.0 software was used to analyze 螖 d by Bland-Altman. Results the correlation coefficient (intraclass correlation coefficient,ICC) between the two groups was 0.951 (ICC75%) 0.263. There was no significant difference between the two groups, and there was good consistency between the two groups. Bland-Altman analysis 螖 d shows that the mean 螖 d _ (mean) of 螖 d is 0.05 mm, standard deviation 螖 D _ (SD) 0.308% confidence interval is (-0.550.65). Clinically acceptable, Therefore, it can be considered that the consistency of the two methods of measurement is good. Conclusion: the detection of dental caries depth by DIAGNOcam system in vitro is basically consistent with the actual depth after caries cavity decayed, suggesting that DIAGNOcam system can be used to evaluate the dental caries depth in clinic.
【作者单位】： 北京大学口腔医学院·口腔医院牙体牙髓科口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室;
【分类号】：R781.1
本文编号：2224917
[Abstract]:Objective: to study the accuracy of a new digital optical fiber radiography (digital imaging fiber optic transillumination,DIFOTI) system for the determination of caries depth by DIAGNOcam system in vitro. Methods: the self-matched design was used to select 74 extracted molars (66 teeth) and 8 premolars (8 premolars) with 1 adjacent caries and undamaged marginal caries, which were used as marking points in the center of the marginal ridge of tantalum surface corresponding to the caries cavity. The isolated teeth were fixed in the standard dentition model, and the cavities were adjacent to the decayed surfaces of the other teeth. Two mm and adjacent space (imitating gingival margin and gingival papilla) of enamel cementum boundary (cemento-enamel junction,CEJ) were sealed with sticky wax, then standard dentition model was put into the imitating head mold, and the isolated teeth were examined by DIAGNOcam system. The projective photos are obtained from tantalum surface by the system probe. Using the DIAGNOcam system software measurement tool, the length from the marking point to the deepest point of caries was recorded as a, and the length from a to the contralateral edge ridge was recorded as the width of the tooth in the image taken by optical fiber radiography. Then, the actual width of the affected teeth was obtained from the point of self-labeling to the line parallel to b in the optical fiber radiography, and the length of the line was recorded as c. The decayed depth measured by optical fiber radiography on the projection photo is d, and the d value is calculated by the formula d/a=c/b (the depth of caries measured by digital optical fiber / the depth of caries in the image = the width of the actual tooth / the width of the tooth in the image). The extracted teeth were removed and the actual hole depth was measured. The difference between d and D of each sample was recorded as 螖 D. Results SPSS 20.0 software was used to verify the consistency, and Med Calc 14.8.1.0 software was used to analyze 螖 d by Bland-Altman. Results the correlation coefficient (intraclass correlation coefficient,ICC) between the two groups was 0.951 (ICC75%) 0.263. There was no significant difference between the two groups, and there was good consistency between the two groups. Bland-Altman analysis 螖 d shows that the mean 螖 d _ (mean) of 螖 d is 0.05 mm, standard deviation 螖 D _ (SD) 0.308% confidence interval is (-0.550.65). Clinically acceptable, Therefore, it can be considered that the consistency of the two methods of measurement is good. Conclusion: the detection of dental caries depth by DIAGNOcam system in vitro is basically consistent with the actual depth after caries cavity decayed, suggesting that DIAGNOcam system can be used to evaluate the dental caries depth in clinic.
【作者单位】： 北京大学口腔医学院·口腔医院牙体牙髓科口腔数字化医疗技术和材料国家工程实验室口腔数字医学北京市重点实验室;
【分类号】：R781.1
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1 陈君,岳林;对光纤透照法诊断后牙邻面龋的评价[J];现代口腔医学杂志;1998年03期
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