| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2014: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
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| Outline of Final Research Achievements |
This study has observed inside the root canal using both optical coherence tomography (OCT) and x-ray microcomputed tomography (μCT).
1. Bubbles were observed in the resin cores and gaps formed between the resin core and dentin by non-destructiveness observation system. The root internal structure could be observed by OCT and the image became clearer when cementum was removed. 2. The resulting OCT images were superior for identifying gap formation at the interface, while μCT images were better to grasp the tooth form. 3. Continuous tomographic images from real-time OCT observation allowed successful construction of a video of the resin core build-up procedure. After 10 to 12 s of light curing, a gap with a clear new signal occurred at the root-core material interface, proceeding from the coronal side (6 mm from the cemento-enamel junction) to the apical side of the root.
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