The Effect of Immersion on Flexural Strength of E-Glass Fiber-Reinforced Composite
| Main Author: | Sunarintyas, Siti |
|---|---|
| Format: | Proceeding PeerReviewed application/pdf |
| Bahasa: | eng |
| Terbitan: |
, 2012
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| Subjects: | |
| Online Access: |
https://repository.ugm.ac.id/273540/1/35.pdf https://repository.ugm.ac.id/273540/ |
Daftar Isi:
- Fiber-reinforced composite (FRC) becomes the material choice for dental bridgework in dentistry. The FRC consists of a resin based matrix composite and a reinforcing fiber which contributes to improve the mechanical profile. The FRC will interact with water, which is the main component of saliva, when it is placed in the oral cavity. The objective of this research was to determine the effect of water immersion time on the flexural strength of E-glass FRC. The material used were unidirectional E-glass fibers (R338-2400/V/P Stick Tech, Finland), and light cured flowable composite resins (Flow®, Stick Tech, Finland). Thirty specimens of (2x2x25) mm were made by embedding two bundles of E-glass fibers into the composite resin and light-cured for both sides for 3x40s. The specimens were immersed in 10 mL distilled water (37oC) for 1,7,14, 21, and 28 days (n=6). The specimens were weighed before and after immersion time to determine the FRC water sorption. The flexural strength was tested by a universal testing machine (Torsee’s UTM, Japan). The data were analyzed by ANOVA and LSD. The water sorption values were increased by the immersion time. The average value of FRC flexural strength by the immersion time were (616.17±6.55) MPa for 1 day, (604.83±4.96) MPa for 7 days, (568.50±5.78) MPa for 14 days, (559.67±6.53) MPa for 21 day, and (540.00±5.37) MPa for 28 days. The ANOVA showed significant influence of water immersion time on the flexural strength of E-glass FRC (p<0.05). There were significant difference on flexural strength between the times of immersion except for 21 days and 28 days (p>0.05). In conclusion, water immersion time up to 28 days reduced the flexural strength of E-glass FRC. The E-glass FRC achieved water sorption equilibrium sometime between 21 days and 28 days immersion time.