Smith R N, Rawlinson A, Lath D, Elcock C, Walsh T F, Brook A H
Department of Oral Health and Development, School of Clinical Dentistry, University of Sheffield, Claremont Crescent, Sheffield, UK.
J Clin Periodontol. 2004 Jul;31(7):569-73. doi: 10.1111/j.1600-051X.2004.00523.x.
The aim of this study was to increase the versatility and further validate the method reported by Smith et al. (2001) by testing the reliability of plaque measurement against two well-known dental plaque quantification methodologies using image analysis in a clinical trial.
The teeth of 40 subjects were disclosed before digital images of the labial and lingual surfaces of their upper and lower incisors were acquired. The amount of plaque present was quantified using a modification of the method described by Smith et al. (2001). The method was modified for obtaining images of the lingual surfaces by incorporating the use of orthodontic occlusal mirrors and 5-mm pieces of moistened blue articulating paper used to enable calibration. Plaque measurements were made from 320 upper and lower anterior teeth from the 40 subjects by two operators. Fliess' coefficient of reliability was used to assess intra- and inter-operator reliability and the independent sample t test was used to assess statistical significance between test and control groups after checking the data for normality. For validation, measurements were recorded using the Turesky et al. (1970) (modification of the Quigley & Hein (1962) plaque index and the Addy et al. (1983) plaque area index. The results were compared with the image analysis method using Pearson's correlation coefficient.
The results for reliability were within Fliess' range of "excellent" for both intra-operator repeatability and inter-operator reproducibility. Pearson's correlation coefficients showed highly significant values indicating the close similarity between all three methods.
This method for the measurement of dental plaque on lingual surfaces of anterior teeth proved reliable. The combined results from the labial and lingual surfaces of anterior teeth using image analysis produced trial conclusions comparable with the alternate plaque quantification methods used, with less clinician time and further producing a permanent database of images for future use.
本研究的目的是通过在一项临床试验中使用图像分析,针对两种著名的牙菌斑量化方法测试菌斑测量的可靠性,以提高方法的通用性并进一步验证史密斯等人(2001年)报告的方法。
在获取40名受试者上下切牙唇面和舌面的数字图像之前,先对其牙齿进行染色。使用对史密斯等人(2001年)描述的方法进行修改后的方法对存在的菌斑量进行量化。该方法通过结合使用正畸咬合镜和用于校准的5毫米湿润蓝色咬合纸进行修改,以获取舌面图像。由两名操作人员对40名受试者的320颗上下前牙进行菌斑测量。使用弗利斯可靠性系数评估操作人员内和操作人员间的可靠性,并在检查数据的正态性后,使用独立样本t检验评估测试组和对照组之间的统计学显著性。为了进行验证,使用图雷斯基等人(1970年)(对奎格利和海因(1962年)菌斑指数的修改)和阿迪等人(1983年)菌斑面积指数记录测量结果。使用皮尔逊相关系数将结果与图像分析方法进行比较。
对于操作人员内重复性和操作人员间再现性,可靠性结果均在弗利斯的“优秀”范围内。皮尔逊相关系数显示出高度显著的值,表明所有三种方法之间非常相似。
这种测量前牙舌面牙菌斑的方法被证明是可靠的。使用图像分析从前牙唇面和舌面获得的综合结果得出的试验结论与所使用的替代菌斑量化方法相当,减少了临床医生的时间,并进一步生成了可供未来使用的永久图像数据库。