Flexural properties of bioactive restoratives in cariogenic environments

Yap, A. U. and Choo, H. S. and Choo, H. Y. and Noor Azlin, Yahya (2021) Flexural properties of bioactive restoratives in cariogenic environments. Operative Dentistry, 46 (4). pp. 448-456. ISSN 0361-7734, DOI https://doi.org/10.2341/20-045-L.

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Official URL: https://doi.org/10.2341/20-045-L


This study determined the mechanical performance of bioactive restoratives in cariogenic environments and compared the flexural properties of various bioactive materials. The materials evaluated included a conventional resin-based composite (Filtek Z350 [FZ]) and 3 bioactive restoratives, namely an alkasite (Cention N [CN]), a giomer (Beautifil-bulk Restorative [BB]), and an enhanced resin-modified glass ionomer (Activa Bioactive Restorative [AV]). Beam-shaped specimens (12 x 2 x 2 mm) were produced, randomly allocated to 4 groups (n=10), and conditioned in deionized solution, remineralizing solution, demineralizing solution (DE), or pH cycled for 14 days at 37 degrees C. After conditioning/pH cycling, the specimens were subjected to 3-point flexural testing. Flexural data were subjected to statistical analysis using analysis of variance or Tukey's test (alpha=0.05). Mean flexural modulus and strength ranged from 3.54 +/- 0.33 to 7.44 +/- 0.28 GPa, and 87.07 +/- 8.99 to 123.54 +/- 12.37 MPa, respectively. While the flexural modulus of the bioactive restoratives was not affected by cariogenic/acidic conditions, flexural strength usually decreased, with the exception of CN. The strength of BB was significantly reduced by DE and pH cycling, while that of AV was lowered by DE. For all conditioning mediums, AV had a significantly lower modulus than the other materials. Apart from conditioning in DE, where differences in flexural strength was insignificant, FZ and AV were generally significantly stronger than BB and CN. The effect of cariogenic environments on flexural strength was found to be material dependent, and aside from the alkasite material (CN), cariogenic conditions were observed to significantly decrease the strength of bioactive restoratives.

Item Type: Article
Funders: Faculty of Dentistry, Universiti Malaya
Uncontrolled Keywords: Resin composite restorations; Strength; Conversion; Shrinkage; Longevity; Fluoride; Fillers; Caries; Wear; PH
Subjects: R Medicine > RK Dentistry
R Medicine > RK Dentistry > Oral surgery
Divisions: Faculty of Dentistry
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Feb 2022 03:21
Last Modified: 18 Feb 2022 03:21
URI: http://eprints.um.edu.my/id/eprint/26278

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