Barium and strontium leaching from aged glass particle/resin matrix dental composites
| Autor: | James L. Drummond, Luke Hanley, Manshui Zhou |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Saliva
Time Factors Materials science Surface Properties Energy-dispersive X-ray spectroscopy Spectrometry Mass Secondary Ion chemistry.chemical_element Composite Resins Diffusion Wavelength-dispersive X-ray spectroscopy stomatognathic system Materials Testing Humans General Materials Science Composite material General Dentistry Strontium Ethanol Air Saliva Artificial Spectrometry X-Ray Emission Water Barium Resin Cements Secondary ion mass spectrometry stomatognathic diseases chemistry Mechanics of Materials Solvents Methacrylates Glass Leaching (metallurgy) Crystallite |
| Zdroj: | Dental Materials. 21:145-155 |
| ISSN: | 0109-5641 |
| DOI: | 10.1016/j.dental.2004.02.009 |
| Popis: | Objectives. This study characterizes the loss of Ba and Sr from glass particle/resin-matrix dental composites during simulated aging. Methods. X-ray wavelength dispersive spectrometry and secondary ion mass spectrometry were used to analyze the Ba and Sr content from the surfaces of three commercial dental composites after aging for 4 and 8 months in humid air, artificial saliva, water, and 50% ethanol. Results. Aging in artificial saliva caused the greatest leaching of Ba or Sr for all the specimens, compared with either lesser or no leaching for aging in ethanol and water. Differences in leaching were observed between the different composites. Composites aged in artificial saliva also picked up elements in the saliva solution and displayed crystallite formation on the surface. Samples aged in ethanol displayed cracking which was not observed for water or artificial saliva. Significance. Dental composites display ion leaching from their surfaces over periods of four to eight months. Three mechanisms are proposed to explain differences in leaching for the various composites and aging solutions. Surface mineralization is also proposed to occur as a self-repair mechanism in artificial saliva. |
| Databáze: | OpenAIRE |
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