A1 Refereed original research article in a scientific journal

Polymerization Shrinkage of Short Fiber Reinforced Dental Composite Using a Confocal Laser Analysis




AuthorsMiura Daisuke, Ishida Yoshiki, Shinya Akikazu

PublisherMDPI

Publication year2021

JournalPolymers

Journal name in sourcePOLYMERS

Journal acronymPOLYMERS-BASEL

Article numberARTN 3088

Volume13

Issue18

Number of pages9

DOIhttps://doi.org/10.3390/polym13183088

Self-archived copy’s web addresshttps://research.utu.fi/converis/portal/detail/Publication/67412312


Abstract
The purpose of this study was to investigate the polymerization shrinkage of short fiber reinforced composite (SFRC) using a multicolor confocal displacement laser that can measure the polymerization shrinkage with high accuracy. The three types of SFRCs used in this study were XD (Ever X Flow Dentin), XB (Ever X Flow Bulk), and XP (EverX Posterior). In addition, CF (Clearfil majesty ES Flow) with hybrid type filler was used as a control. The measured values of the final polymerization shrinkage rate and amount of polymerization shrinkage rate when the polymerization shrinkage rate became constant (less than 0.1 mu m/s) were approximated for all SFRCs. XP had a large aspect ratio of glass fiber filler and showed a significant difference from XD with a small aspect ratio (p < 0.05). There was no significant difference in the measured value of time when the polymerization contraction reached a constant speed (0.1 mu m/s or less) for all SFRCs (p > 0.05). There was no significant difference in the measured values of polymerization shrinkage rate after the polymerization shrinkage reached a constant rate for all SFRCs (p > 0.05). These results show that glass fiber with large aspect ratio can alleviate polymerization shrinkage stress. The polymerization behavior of SFRC was found to be dependent on the amount of glass fiber filler, aspect ratio, and orientation.

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Last updated on 2024-26-11 at 14:58