Wear characteristics and inhibition of enamel demineralization by resin-based coating materials

Naohiko Kawamura, Masahiro Iijima, Shuich Ito, William A. Brantley, Satish B. Alapati, Takeshi Muguruma, Kyotaro Kawaguchi, Takashi Saito, Itaru Mizoguchi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

In this study, wear and inhibition of enamel demineralization by resin-based coating materials were investigated. Seven commercially available coating materials, with and without fillers, were used. A mechanical wear test was performed, and the specimens were then examined with a scanning electron microscope. Hardness and elastic modulus measurements for each material were obtained by nanoindentation testing. Thin layers of each material were applied on human enamel surfaces, which were subjected to alternating immersion in demineralizing and remineralizing solutions. The inhibition ability of enamel demineralization adjacent to the coating was estimated with depth-dependent mechanical properties using the nanoindentation test. The non-filled coating material showed significantly lower hardness, lower elastic modulus, and higher weight loss. There were no significant differences in weight loss among the six filled coating materials. After the alternating immersion protocol, the enamel specimens having application of coating materials with ion-releasing ability were harder than those in the other groups in some locations 1–11 μm from the enamel surface and within 300 μm from the edge of the coating materials. In conclusion, clinical use of the resin-based coating materials with ion-releasing ability may prevent demineralization of exposed enamel adjacent to the coating during treatment.

Original languageEnglish
Pages (from-to)160-167
Number of pages8
JournalEuropean Journal of Oral Sciences
Volume125
Issue number2
DOIs
Publication statusPublished - 2017 Apr 1
Externally publishedYes

Keywords

  • enamel coating
  • enamel demineralization buffering
  • nanoindentation
  • wear

ASJC Scopus subject areas

  • Dentistry(all)

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