Affiliation:
1. Department of Dental Biomaterials, College of Dentistry, University of Florida, Gainesville, Florida 32610
Abstract
The leakage of filler elements from four composites after storage in water was investigated by use of atomic absorption spectrophotometry. The results confirmed previous findings that leaching of silicon from different composites is strongly dependent on filler composition. Consideration of the total filler surface of each composite material indicated that quartz as well as pyrolytic silica-containing composites leached less silicon than did composites containing fillers of strontium and/or barium glasses. A correlation between leakage and crack formation in the matrix appeared to exist for all composites except for the microfilled resin. These cracks were explained as a result of osmotic pressure built up at the matrix-filler interface due to hydrolytic degradation of the filler. Of the investigated materials, the microfilled resin was found to be the most stable material in a wet environment with respect to crack formation. This finding was explained by filler composition, filler form, and the specific structure of the microfilled resin.
Reference32 articles.
1. Water damage in glass fibre/resin composites
2. Ashbee, K.H.G. (1971); Water Damage in Glass Fibre/Polyester Resin Composites . In: Electron Microscopy and Structures of Materials; Proceedings, G. Thomas, R.M. Fullrath, and R.M. Fisher, Eds. Berkeley, CA: University of California Press, pp. 1205-1222.
3. Compatibility of Various Materials with Oral Tissues. I: The Components in Composite Restorations
4. The absorption of water by acrylic resins and other materials
Cited by
377 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献