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KMID : 1142520180060020009
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Korean Journal of Clinical Dental Hygiene
2018 Volume.6 No. 2 p.9 ~ p.16
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Differences in Fluorescence Intensities of Dental Materials Evaluated by Quantitative Light-induced Fluorescence Digital
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Kim Young-Seok
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Abstract
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Objectives: This study aimed to compare the fluorescence intensities of different dental materials using quantitative light-induced fluorescence digital (QLF-D) light source and compare the fluorescence intensity contrast with color contrast between a restoration material and the adjacent tooth region.
Methods: Five dental materials were investigated: glass ionomer cement (GIC), Intermediate Restorative Material (IRM); zinc polycarboxylate cement (PCC); sealant; composite resin. Composites were used to prepare composite discs and fill holes prepared in extracted human teeth. White-light and fluorescence images of all specimens were obtained using QLF-D and converted into 8-bit grayscale images. Fluorescence intensities of the dental materials, and the fluorescence intensity contrast and color contrast between the dental restoration and adjacent tooth region, were calculated as grayscale levels.
Results: Grayscale levels differed significantly more between the restoration and adjacent tooth region in the fluorescence images than in white-light images, except for resin and GIC (p < 0.05). Grayscale levels of the dental materials differed significantly (p < 0.05): sealant (177.8±2.5); composite resin (203.1±2.2); GIC (196.5±1.7); IRM (162.7±1.5); PCC (119.9±1.9).
Conclusions: The dental materials showed varying fluorescence intensities. Differences between the dental materials and adjacent tooth region were greater for fluorescence intensity contrast than for colors observed in the white-light.
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KEYWORD
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Dental materials, Fluorescence intensity, QLF-D
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