A systematic approach to standardize artificial aging of resin composite cements
| Autor: | Lukas Blumer, Fredy Schmidli, Roland Weiger, Jens Fischer |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Dental Stress Analysis
Cement Time Factors Materials science Surface Properties Resin composite Polyurethanes Water storage Acrylic Resins Temperature Adhesiveness Water Temperature cycling Composite Resins Artificial aging Compressive strength Hardness Mechanics of Materials Tensile Strength Materials Testing Ultimate tensile strength General Materials Science Composite material International standardization General Dentistry |
| Zdroj: | Dental Materials. 31:855-863 |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2015.04.015 |
| Popis: | Objective The aim of the investigation was to contribute to the ongoing discussion at the international standardization committee on how to artificially age dental resin composite cements. Methods Indirect tensile strength ( n = 30) of a dual-cured resin composite cement (Panavia F2.0) was measured to evaluate the effect of water storage at 37 °C or thermal cycling (5 °C/55 °C/1 min) for up to 64 days. The influence of water temperature (5–65 °C) after 16 days and the effect of 1 day water storage at 37 °C prior to aging were assessed. Storage in air at 37 °C served as control. Results Thermal cycling affected the indirect tensile strength most, followed by water storage at 55 °C, whereas water storage at 37 °C had only little influence. Major deterioration occurred before day 4 (≈6000 cycles). A 1-day pre-treatment by water storage at 37 °C prior to thermal cycling attenuated the effect of aging. Significance For the material investigated, thermal cycling for 4 days is the most efficient aging procedure. A 1-day water storage at 37 °C prior to thermal cycling is recommended to allow complete polymerization. A 4-day water storage at 55 °C may be considered as a viable alternative to thermal cycling. |
| Databáze: | OpenAIRE |
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