Ong, J. E. X. and Yap, A. U. and Aziz, A. Abdul and Yahya, N. A. (2023) Flexural properties of contemporary bioactive restorative materials: Effect of environmental pH. Operative Dentistry, 48 (1). ISSN 15592863, DOI https://doi.org/10.2341/21-202-L.
Full text not available from this repository.Abstract
This study investigated the effects of environmental pH on the flexural properties of ion-releasing restorative materials (IRMs), including giomer (Beautifil-Bulk Restorative -BB), alkasite (Cention N -CN), bioactive composite (Activa -AB) and resin-modified glass ionomer (Riva Light Cure -RV) restoratives. A bio-inert resin-based composite (Filtek Bulk-fill Posterior -FB) served as the control. Stainless steel molds were used to fabricate 40 beam-shaped specimens (12mm x 2mm x 2mm) for each material. The specimens were finished, measured, and randomly distributed into four groups (n=10) and immersed in aqueous solutions of pH 3.0, pH 5.0, pH 6.8, and pH 10.0 at 37oC for 28 days. Specimens were then subjected to a uniaxial three-point bending flexural test with a load cell of 5 KN and a fixed deformation rate of 0.5 mm/ min until fracture occurred. Flexural modulus and strength were statistically analyzed using analysis of variance/Dunnet T3's test (p=0.05). Mean flexural modulus varied from (2.40 +/- 0.41 to 9.65 +/- 1.21 GPa), while mean flexural strength ranged from (21.56 +/- 2.78 to 163.86 +/- 13.13 MPa). Significant differences in flexural properties were observed among the various pH values and materials. All materials immersed in artificial saliva (pH 6.8) presented the highest flexural properties, except AB. The flexural strength of AB was significantly better when exposed to acidic environments. FB had better flexural properties than IRMs after exposure to a range of environmental pH values.
| Item Type: | Article |
|---|---|
| Funders: | None |
| Uncontrolled Keywords: | Composite Resins; Dental Materials; Flexural Strength; Hydrogen-Ion Concentration; Materials Testing; Surface Properties; Water |
| Subjects: | R Medicine > RK Dentistry R Medicine > RK Dentistry > Preventive dentistry |
| Divisions: | Faculty of Dentistry > Department of Restorative Dentistry |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 24 Nov 2024 04:12 |
| Last Modified: | 24 Nov 2024 04:12 |
| URI: | http://eprints.um.edu.my/id/eprint/39082 |
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