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J Korean Acad Pediatr Dent. 2003;30(2): 189-195.
DEVELOPMENT OF FILTERING SYSTEM OF LASER FLUORESCENCE FOR IMPROVEMENT OF THE DIAGNOSTIC SENSITIVITY FOR DENTAL CARIES
이상호1, 박종휘1, 국중기2, 이난영1
1조선대학교 치과대학 소아치과학 교실
2조선대학교 치과대학 구강생화학 교실
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ABSTRACT
The objective of this study is to improve the optical sensitivity of laser fluorescence for detection of incipient enamel caries. An incipient carious lesion was formed in various stages by placing an enamel specimen of a bovine tooth in STPP demineralization solution. After measuring the optical density of the lesion surface by laser fluorescence induced by argon laser and various alter of yellow(500-520nm), amber(520-540nm), orange(540-560nm), and red(560-580nm), the specimen was cut vertically to measure the depth of the lesion using a polarizing microscope. SAS statistical program was used to analyze the relationship between the optical density of the lesion suface and the depth of the lesion. The results were as follows: 1. The optical density of early carious lesion, measured by laser fluorescence with amber and orange filter, and lesion depth observed by polarizing microscope, were increased as demineralization time increased. 2. The correlation coefficient between optical density of the lesion surface and the histological depth of the lesion was the highest in orange filter(r=0.49), followed by amber(r=0.32), yellow(r=0.13) and red(0.01). 3. Regression analysis showed that the most linear relationship between the optical density and the lesion depth was existed in orange filter group. In regard above results, laser fluorescence could be considered to be reliable for optical diagnosis of dental caries.
Keywords: Dental caries | Optical diagnosis | Laser fluorescence | Optical density | Glass filter
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