Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2020 Jan;24(1):369-375.
doi: 10.1007/s00784-019-02912-1. Epub 2019 May 18.

The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and Bis-GMA-based resin composites

Hamad Algamaiah  1   2 , Robert Danso  3 , Jeffrey Banas  1 , Steve R Armstrong  1 , Kyumin Whang  3 , H Ralph Rawls  3 , Erica C Teixeira  4
Affiliations

The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and Bis-GMA-based resin composites

Hamad Algamaiah et al. Clin Oral Investig. 2020 Jan.

Abstract

Purpose: To determine the effect of aging methods on the fracture toughness of a conventional Bis-GMA-based resin composite (Filtek Supreme), an ormocer-based resin composite (Admira), and an experimental hydrophobic oxirane/acrylate interpenetrating network resin system (OASys)-based composite.

Methods: A 25 × 5 × 2.8-mm stainless-steel mold with 2.5 mm single-edge center notch, following ASTM standards [E399-90], was used to fabricate 135 specimens (n = 15) of the composite materials and randomly distributed into groups. For the baseline group, specimens were fabricated and then tested after 24-h storage in water. For the biofilm challenge, specimens were randomly placed in a six-well tissue culture plate and kept at 37 °C with bacterial growth media (Brain Heart Infusion (BHI); Streptococcus mutans) changed daily for 15 days. For the water storage challenge, specimens were kept in 5 ml of deionized distilled autoclaved water for 30 days at 37 °C. μCT evaluation by scanning the specimens was performed before and after the proposed challenge. Fracture toughness (KIc) testing was carried out following the challenges.

Results: μCT surface area and volume analyses showed no significant changes regardless of the materials tested or the challenge. Filtek and Admira fracture toughness was significantly lower after the biofilm and water storage challenges. OASys mean fracture toughness values after water aging were significantly higher than that of baseline. Toughness values for OASys composites after biofilm aging were not statistically different when compared to either water or baseline values.

Conclusion: The fracture toughness of Bis-GMA and ormocer-based dental resin composites significantly decreased under water and bacterial biofilm assault. However, such degradation in fracture toughness was not visible in OASys-based composites.

Clinical significance: Current commercial dental composites are affected by the oral environment, which might contribute to the long-term performance of these materials.

Keywords: Biofilm challenge; Dental composites; Fracture toughness; Micro-CT.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: Hamad Algamaiah declares that he has no conflict of interest. Robert Danso declares that he has no conflict of interest. Jeffrey Banas declares that he has no conflict of interest. Steve R. Armstrong declares that he has no conflict of interest. Kyumin Whang declares that he has no conflict of interest. H. Ralph Rawls declares that he has no conflict of interest. Erica C. Teixeira declares that he has no conflict of interest.

Figures

Figure 1:
Figure 1:
Flowchart of the experimental study design
See this image and copyright information in PMC

References

    1. Heintze SD, Ilie N, Hickel R, Reis A, Loguercio A and Rousson V (2017) Laboratory mechanical parameters of composite resins and their relation to fractures and wear in clinical trials-A systematic review. Dent Mater 33:e101–e114. doi: 10.1016/j.dental.2016.11.013 - DOI - PubMed
    1. Ferracane JL (2013) Resin-based composite performance: are there some things we can’t predict? Dent Mater 29:51–8. doi: 10.1016/j.dental.2012.06.013 - DOI - PMC - PubMed
    1. Martos J, Osinaga PWR, Oliveira E, Castro LAS (2003) Hydrolytic Degradation of Composite Resins: Effects on the Microhardness. Materials Research 6:99–604.
    1. Arikawa H, Kuwahata H, Seki H, Kanie T, Fujii K and Inoue K (1995) Deterioration of mechanical properties of composite resins. Dent Mater J 14:78–83. - PubMed
    1. Tjaderhane L, Nascimento FD, Breschi L, Mazzoni A, Tersariol IL, Geraldeli S, Tezvergil-Mutluay A, Carrilho M, Carvalho RM, Tay FR and Pashley DH (2013) Strategies to prevent hydrolytic degradation of the hybrid layer-A review. Dent Mater 29:999–1011. doi: 10.1016/j.dental.2013.07.016 - DOI - PMC - PubMed

LinkOut - more resources