Journal of the Korean Academy of Pediatric Dentistry 2006;33(4):615-623.
Published online November 30, 2006.
A STUDY ON THE RELIABILITY OF THE OPTICAL CARIES ACTIVITY TEST
조선대학교 치과대학 소아치과학교실 
광학적 치아우식활성 검사법의 신뢰도에 관한 연구
박철홍, 이난영, 이상호
조선대학교 치과대학 소아치과학교실
Correspondence:  , 
Abstract
The purpose of this study was to evaluate the specificity, sensitivity, and diagnostic power of caries activity test using LED fluorescence. The subjects of this study were 55 children of 6~7 years old. LED light were irradiated to labial or buccal surface of all teeth. Fluorescence from initial carious lesion of teeth illuminated by an LED light was observed through barrier filter and the number of teeth showing lesion, size and position of lesion were counted. Streptococcus mutans colony counting and dDfFtT rate test were also done and their correlation was compared. And then specificity, sensitivity, diagnostic power of optical caries activity test using LED light were evaluated. 1. There was positive $correlation({ γ=0.43) between LED fluorescence test and Streptococcus mutans count(P<0.05). 2. When visual examination was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 100%, 76.1%, and 100%. 3. When dDfFtT rate was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 88.9%, 47.8%, and 95.7%. 4. When S. mutans colony counting was defined to standard testing method, the specificity, sensitivity, diagnostic power of LED fluorescence test were 100%, 58.7%, and 100%. Considering the above results, optical caries activity test using LED light could be regarded as a practical method because of its close relationship with microbiological caries activity test.
Key Words: LED fluorescence, Caries activity test, Initial dental caries, Sensitivity, Specificity


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