Improved resin-to-dentin bond strength and durability via non-thermal atmospheric pressure plasma drying of etched dentin

Geum Jun Han, Jun Min Kim, Byeong Hoon Cho, Yunchan Hwang, Hae Young Kim

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

This study aimed to evaluate the improvement in strength and durability of the bond between dentin and composite resins following plasma drying of the etched dentin surface using non-thermal atmospheric pressure plasma. Plasma drying was applied to the etched dentin before applying adhesive. Conventional wet-bonding and helium (He) gas-dried bonding schemes were used as control groups. The bond strength of the composite resin to dentin was measured as the microtensile bond strength at 24 h after bonding and after 10,000 cycles of thermocycling. Hybrid layer formation was observed using micro-Raman spectroscopy and scanning electron microscopy. Although the bond-strength values were not statistically different either at 24 h after bonding or after thermocycling, the bond strength of the plasma-dried bonding group was significantly higher than the conventional wet-bonding group and He gas-dried bonding group. Micro-Raman spectral analysis revealed effective penetration of the adhesive and an improved polymerization rate of the adhesive after plasma drying. Plasma drying increased the penetration of hydrophobic resin into the collagen mesh structure, which improved mechanical bonding and long-term durability between dentin and composite resin.

Original languageEnglish
Pages (from-to)170-178
Number of pages9
JournalEuropean Journal of Oral Sciences
Volume127
Issue number2
DOIs
Publication statusPublished - 2019 Apr

Keywords

  • Raman spectroscopy
  • Weibull statistics
  • dental bonding
  • desiccation
  • plasma gas

ASJC Scopus subject areas

  • Dentistry(all)

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