| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2011: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
We clarified the caries lesion recovery by the laser irradiation on the tooth surface, using human molars with subsurface demineralization. Purpose of our study is the quality of enamel after a CO2 laser radiation. These observations are done non-destructively by means of micro CT. Sequential quantitative changes was evaluated with the time axis variation of the calcification and the degree widening range of lesion. We used the molars having a white spot caries in smooth surface for experiments. In order to observe the recovery of caries, we performed the combination of CO2 laser irradiation and sodium fluoride application to the white spot. We have observed samples in the 3D image after shooting micro CT. As results, it was a significant difference in demineralization depth in a sample of laser irradiated sample. We suggested the possibility of the tooth surface coating agent and irradiation of the CO2 laser is effective area of subsurface demineralization from this study.
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