치과용 광중합기를 이용한 광학적 치아우식활성도 검사법 개발

Abstract

The purpose of this study was to develop a practical caries activity test by fluorescence using laser, plasma light and halogen light . The subjects of study were 45 children of 7-8 years old. Argon laser, plasma light and halogen light were irradiated to buccal or labial surface of all teeth. Fluorescence of initial carious lesion from teeth was observed through barrier filter and the number of teeth showing lesion was counted. Visual examination for the dDfFtT, mutans streptococci screening test and Lactobacilli colony counting were also done. Data analysis was accomplished by Axelsson's method. The result from the present study can be summarized as follows. 1. Laser, plasma light and halogen light could detect the initial carious lesions better than visual examination(p＜0.05). 2. There was positive correlation between laser(r=0.42), plasma light(r=0.41), halogen light(r=0.39) and dDfFtT rate(p＜0.01) 3. When dDfFtT rate was defined to standard testing method, the specificity of laser, plasma light and halogen light were 83.3%, 83.3%, 75% and sensitivity were 92.3%, 89.7%, 89.2% and predictive value were 82.2%, 80%, 77.8%. 4. When mutans streptococci screening test was defined to standard testing method, the specificity of all methods was 100% and sensitivity of laser, plasma light and halogen light were 88%, 87.8%, 80.5% and predictive value were 82.2%, 80%, 73.3%. 5. When Lactobacilli colony count was defined to standard testing method, the specificity of laser, plasma light and halogen light were 90%, 90%, 80% and sensitivity were 91.4%, 88.6%. 74.3% and predictive value were 73.3%, 71.1%, 62.2%. In regard to above results, laser, plasma light and halogen light all considered to be reliable method for determining individual caries activity. And they were also considered to be practical method because it would be simple, inexpensive, and time saving method.