anorthite has been researched along with fluorapatite* in 2 studies
2 other study(ies) available for anorthite and fluorapatite
| Article | Year |
|---|---|
Heat-pressed ionomer glass-ceramics. Part I: an investigation of flow and microstructure.
This study investigated a series of ionomer glasses based on the formula: 4.5SiO(2)-1.5P(2)O(5-)(X)Al(2)O(3)-4.5CaO-0.5CaF(2), where X was varied from 3.0 to 1.5. The possibility of processing ionomer glasses using a heat-pressing method for dental restorations was investigated.. A simple flow test was designed to measure the amount of flow the glasses underwent as a result of heat-pressing at 1150 degrees C for different times. Heat-pressed samples of the X=3.0, 2.8, 2.4 and 2.0 glass were further heat-treated for 1 and 4 h at 1150, 1200 and 1250 degrees C to promote crystal growth. Scanning electron microscopy was used to investigate the microstructure of the glass-ceramics. X-ray diffraction was used to identify the crystalline phases in the glass-ceramics.. The ionomer glasses exhibited excellent flow ability. Crystallization could not be suppressed during heat-pressing. Very fine scale fluorapatite crystals were present in all of the samples after heat-pressing. Mullite and/or anorthite formed as a second crystal phase. On further heat-treatment of the samples, changes in crystal phases took place.. Apatite was the main crystalline phase produced in the glass-ceramics; this factor is of clinical significance. In conclusion these glass-ceramics could be suitable for all-ceramic dental restorations. Topics: Acrylic Resins; Aluminum Silicates; Apatites; Calorimetry, Differential Scanning; Ceramics; Crystallization; Crystallography, X-Ray; Dental Porcelain; Dental Restoration, Permanent; Hot Temperature; Microscopy, Electron, Scanning; Rheology; Silicon Dioxide; Viscosity | 2003 |
The fluorapatite-anorthite system in biomedicine.
Glasses and glass ceramics of fluorapatite-anorthite (eutectic composition) were produced and characterized in order to evaluate their potential application in biomedicine. Bio-reactivity was determined by in vitro tests by immersion of powders in simulated plasma liquids as well as by in vivo experiments by implantation in rabbits. According to the results, the investigated materials are bio-acceptable since no toxic or other harmful evidence was detected. Glass-ceramics showed remarkable inertness, whereas glasses spontaneously dissolved in SBF and after 1 week moderate formation of apatite was observed, that however ceased within a month. Topics: Aluminum Silicates; Animals; Apatites; Biocompatible Materials; Ceramics; Glass; In Vitro Techniques; Materials Testing; Microscopy, Electron, Scanning; Rabbits | 2003 |