Journal article
The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and Bis-GMA-based resin composites
Clinical oral investigations, Vol.24(1), pp.369-375
01/01/2020
DOI: 10.1007/s00784-019-02912-1
PMCID: PMC6859191
PMID: 31104114
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 x 5 x 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 degrees 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 degrees C. mu CT evaluation by scanning the specimens was performed before and after the proposed challenge. Fracture toughness (K-Ic) testing was carried out following the challenges. Results mu CT 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.
Details
- Title: Subtitle
- The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and Bis-GMA-based resin composites
- Creators
- Hamad Algamaiah - King Saud UniversityRobert Danso - The University of Texas Health Science Center at San AntonioJeffrey Banas - University of IowaSteve R. Armstrong - University of IowaKyumin Whang - The University of Texas Health Science Center at San AntonioH. Ralph Rawls - The University of Texas Health Science Center at San AntonioErica C. Teixeira - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Clinical oral investigations, Vol.24(1), pp.369-375
- DOI
- 10.1007/s00784-019-02912-1
- PMID
- 31104114
- PMCID
- PMC6859191
- NLM abbreviation
- Clin Oral Investig
- ISSN
- 1432-6981
- eISSN
- 1436-3771
- Publisher
- Springer Nature
- Number of pages
- 7
- Grant note
- DOI: 10.13039/100000002, name: National Institutes of Health, award: NIH/NIDCR Grant U01 DE23778
- Language
- English
- Date published
- 01/01/2020
- Academic Unit
- Pediatric Dentistry; Operative Dentistry; Dental Research
- Record Identifier
- 9984367738902771
Metrics
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