12-Month flexural mechanical properties of conventional and self-adhesive flowable resin composite materials

John Brewster, Howard W. Roberts

Research output: Contribution to journalArticlepeer-review


The aim of this study was to investigate the 12-month flexural mechanical properties of 23 flowable resin-based composites (FRBC) that included 5 self-adhesive FRBC materials. Specimens were evaluated following ISO 4049:2019 guidelines, but additionally stored in physiologic 0.2M phosphate buffered saline solution being tested at 24 h, 1 week, 1 month, and at 3-, 6-, 9-, and 12-months. While some deviation and degradation were noted at testing intervals, conventional FRBC materials overall demonstrated greater flexural strength than the self-adhesive and compomer materials. Three self-adhesive materials and the compomer were below recommended ISO 4049:2019 flexural strength values at 24 h with another after 6 months storage. Conventional FRBC materials, except at 1 month, overall demonstrated increased flexural modulus than the self-adhesive FRBC materials. Although results were material dependent, conventional FRBC materials demonstrated overall greater flexural mechanical properties as compared to the self-adhesive FRBC materials and the compomer evaluated.

Original languageEnglish
Pages (from-to)598-609
Number of pages12
JournalDental Materials Journal
Issue number4
StatePublished - 2023

Bibliographical note

Publisher Copyright:
© 2023, Japanese Society for Dental Materials and Devices. All rights reserved.


  • Flexural modulus
  • Flexural strength
  • Flowable compomer
  • Flowable resin composites
  • Self-adhesive flowable resin composites

ASJC Scopus subject areas

  • Ceramics and Composites
  • General Dentistry


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