Journal
DENTAL MATERIALS JOURNAL
Volume 31, Issue 6, Pages 909-915Publisher
JAPANESE SOC DENTAL MATERIALS DEVICES
DOI: 10.4012/dmj.2012-061
Keywords
Resin coating; Root caries; Demineralization; S-PRG
Funding
- Japan Society for the Promotion of Science [23390434]
- Grants-in-Aid for Scientific Research [22390399, 23659866, 22592112, 22792104, 23390434] Funding Source: KAKEN
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The purpose of this study was to evaluate the ability of a coating material containing the surface pre-reacted glass-ionomer (S-PRG) filler to protect the root from demineralization in vitro. The proprietary coating resin containing the S-PRG filler (PRG Barrier Coat) was applied to human root dentin and immersed in acid buffer at pH 4.5 for 3 d. Demineralization was evaluated by micro-CT scanning and the dentin-material interface observed by scanning electron microscopy. The ability of the coating resin to modify acid production by Streptococcus mutans was investigated by monitoring pH using an ion-sensitive field-effect transistor pH electrode. Application of PRG Barrier Coat produced a coating layer with the thickness of approximately 200 p,m and completely inhibited demineralization. The bacteria-induced pH fall at the material surface was significantly inhibited. We conclude that S-PRG filler-containing coating resin may be an effective material for protecting exposed root from both chemical and biological challenges.
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