Journal of the Korean Academy of Pediatric Dentistry 2010;37(1):13-23.
Published online February 28, 2010.
A STUDY ON THE OPTIMAL ILLUMINATION POWER OF DIFOTI
Jong-Bin Kim, Jong-Soo Kim, Seung-Hoon Yoo, Yong-Kee Kim*
Dankook University, Dental College, Department of Pediatric Dentistry, *Gaondental Hospital 
Correspondence:  Jong-Soo Kim,  Tel: 041-550-1935, Email: jskim@dku.edu
Received: 15 September 2009   • Accepted: 30 December 2009
Abstract
This study was performed to compare the quality of image processing between the newly developed prototype using light emitting diode(LED) and the conventional DIFOTITM system(EOS Inc., USA). To estimate the optimal light emitting power for the improved images, primary enamel surfaces treated under Carbopol 907 de-mineralizing solution were taken daily during 20 days of experimental periods by both DIFOTI systems. The results of comparative analyses on the images obtained from both systems with polarized image as gold standard can be summarized as follows: 1. Trans-illumination indices of images taken from primary enamel surfaces were decreased with time in both systems. 2. The differences of intensity of luminance between sound and de-mineralized enamel surface in prototype DIFOTI system was shown to be relatively smaller than conventional DIFOTITM system. 3. From the comparative analysis of images from both DIFOTI system with polarized images as gold standard, the difference between sound and de-mineralized enamel surface of intensity of luminance of DIFOTITM system was more correlated to polarized images than prototype of DIFOTI system. With the optimal LED emitting power, the control of aperture of digital camera is considered as the another key factor to improve the DIFOTI images. For the best image quality and analysis, the development of the improved image processing software is required.
Key Words: Fiber-optic trans-illumination, Enamel caries, Early detection of dental caries, Polarized microscope


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