Micro-computed tomographic evaluation of the effects of pre-heating and sonic delivery on the internal void formation of bulk-fill composites


Demirel G., Orhan A. I. , Irmak O., Aydin F., Buyuksungur A., Bĺlecenoglu B., ...More

Dental Materials Journal, vol.40, no.2, pp.525-531, 2021 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 40 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.4012/dmj.2020-071
  • Journal Name: Dental Materials Journal
  • Journal Indexes: Science Citation Index Expanded, Scopus, Aerospace Database, Biotechnology Research Abstracts, Communication Abstracts, Compendex, EMBASE, MEDLINE, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.525-531
  • Keywords: Composite placement, Internal void, Sonic activation, Pre-heating, Micro-computed tomography, RESIN COMPOSITES, RHEOLOGICAL PROPERTIES, GAP FORMATION, POROSITY, SHRINKAGE, RESTORATIONS, MICROLEAKAGE, ADAPTATION

Abstract

© 2021, Japanese Society for Dental Materials and Devices. All rights reserved.The aim of this study was to compare the effects of conventional, sonic or pre-heating insertion techniques on internal void formation of bulk-fill composites with micro-computed tomography. Standardized cylindrical cavities were prepared in 160 human third molars. Four groups received different paste-like bulk-fill composites: SonicFill 2 (SF2); VisCalor Bulk (VCB); Filtek One Bulk-fill restorative (FBF); Tetric EvoCeram Bulk Fill (TEB); and a conventional posterior composite, Clearfil Majesty Posterior (CMP). A hybrid CAD/ CAM block was selected as a control (n=10). Composite restorations were built according to each resin composite type and insertion technique (n=10). Micro-CT was used to assess internal void rates. Data was analyzed with two-way ANOVA and Tukey’s multiple comparisons test (a=0.05). CAD/CAM blocks were free of voids. For each composite, the highest void rates were observed for the sonic delivery method (p<0.05) except for SF2. SF2 was not affected by insertion techniques (p>0.05). Other composites showed the lowest void rates with pre-heating technique.