Enamel margins resealing by low-viscosity resin infiltration

Jorge Espigares, Juri Hayashi, Yasushi Shimada, Junji Tagami, Alireza Sadr

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


This study evaluated low-viscosity resin potential as enamel marginal gap sealant for existing composite restoration. Standard restorations with marginal gaps were created in bovine teeth; gaps were resealed using G-Bond Plus (GB, GC, Tokyo, Japan) or Icon (ICN, DMG, Hamburg, Germany) with or without HCl pretreatment (n=8). Swept-source optical coherence tomography (SS-OCT) images were taken before and after resealing of the margin and thermal cycling to calculate enamel marginal gap extent. Cross-sectional microscopy was performed to confirm SS-OCT findings. SS-OCT showed remarkable reduction of backscatter signal at enamel margins after application of the low-viscosity resin. Enamel margin resealing significantly decreased gap and there was a significant difference between ICN (regardless of HCl pretreatment) and GB, while thermal cycling increased gaps (p<0.05). The low-viscosity resin could effectively infiltrate micro-gaps at enamel margins and improve sealing of an existing composite restoration. Resin infiltration is a viable option for resealing intact restorations with open margins.

Original languageEnglish
Article numberdmj/2017-153
Pages (from-to)350-357
Number of pages8
JournalDental materials journal
Issue number2
Publication statusPublished - 2018


  • Hydrochloric acid
  • Resealing
  • Resin infiltration
  • SS-OCT

ASJC Scopus subject areas

  • Ceramics and Composites
  • Dentistry(all)


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