Effect of dispensing rate on internal void formation in restorations built with sonically activated resin composite

Irmak O., DEMİREL G., ORHAN A. I., ORHAN K.

POLYMER COMPOSITES, vol.42, no.9, pp.4302-4307, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 42 Issue: 9
  • Publication Date: 2021
  • Doi Number: 10.1002/pc.26148
  • Journal Name: POLYMER COMPOSITES
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.4302-4307
  • Keywords: bulk fill composite, extrusion force magnitude, internal void, sonic energy, CLASS-I
  • Ankara University Affiliated: Yes

Abstract

Internal void formation in sonically activated resin composite (SonicFill 2, Kavo Kerr, Orange, CA, USA) applied at three different extrusion force magnitudes was evaluated. Forty SonicFill 2 composite compules were divided into four groups according to dispensing method and magnitude of extrusion force as follows: No sonic energy/manual dispensing (FM) (control), sonic energy with low extrusion force (F1), sonic energy with medium extrusion force (F3), and sonic energy with high extrusion force (F5) (n = 10). For F1, F3, and F5, sonic energy was delivered using a SonicFill handpiece. For the control, no sonic energy was applied. Composites were placed into the molds and polymerized. Micro-computed tomography scanning for intrarestoration void assessment was performed and intrarestoration void rates (%) were calculated. Data were statistically analyzed (alpha = 0.05). Sonic energy yielded lower intrarestoration void rates than that of the control (10.58% +/- 1.74%) (p < 0.05). Intrarestoration void rates between F1 (8.11% +/- 0.99%) and F3 (7.00% +/- 0.95%) were similar (p > 0.05), whereas F5 (5.14 +/- 0.91%) led to significantly lower void rates compared to F1 and F3 (p < 0.05). The highest extrusion force (F5) setting of the SonicFill handpiece caused the lowest internal void rates in SonicFill 2 resin composite restorations compared to those of the medium (F3) and lowest (F1) settings.