Oxide layer characteristics and interfacial analysis of porcelain fused to high-gold alloy using multitechnique analysis methods
| Autor: | Ming Chen, Hao-Sheng Chang, Yu-Chun Chiu, Chao-Sen Yang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
X-ray photoelectron spectroscopy
Materials science Scanning electron microscope medicine.medical_treatment Fracture (mineralogy) Alloy Oxide electron probe microanalysis 02 engineering and technology Electron microprobe engineering.material Crown (dentistry) scanning electron microscopy combined with energy-dispersive X-ray analysis 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine medicine Ceramic Composite material General Dentistry gold–platinum alloy 030206 dentistry 021001 nanoscience & nanotechnology lcsh:RK1-715 chemistry lcsh:Dentistry visual_art visual_art.visual_art_medium engineering Original Article 0210 nano-technology |
| Zdroj: | Journal of Dental Sciences, Vol 12, Iss 4, Pp 319-327 (2017) Journal of Dental Sciences |
| ISSN: | 1991-7902 |
| DOI: | 10.1016/j.jds.2017.03.003 |
| Popis: | Background/purpose: In a previous fractural study, high-gold crowns possessed the second highest fracture force. The objective of this study is to analyze the interface of porcelain fused to high-gold alloy using different observation devices. Materials and methods: High-gold crowns specimens with the morphology of a maxillary second premolar were compressed vertically in the center of the occlusal surface until fracture using a universal testing machine. The fractured surfaces were examined using scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM/EDX) to determine the failure mode. The ceramicâmetal interface of the crown was examined with electron probe microanalysis (EPMA). In addition, sheet specimens with dimensions of 10Ã9Ã4 mm3 were prepared to examine the surface morphology and composition of high-gold alloy after oxidation using X-ray photoelectron spectrometer (XPS). Results: The average fracture force was 1368±312 N. Photograph of fractured crown and SEM/EDX analyses reveal that the crown initially suffered from cohesive failure in the upper and middle regions, with the fracture occurring mostly within the ceramic. XPS results and both EPMA color photomicrographs of crown and sheet specimens show that indium was observed along the porcelainâmetal interface with a 1- to 2-μm disrupted zone of oxide layer. Conclusion: In2O3 and Au were found along the interface from the multitechnique analysis methods; the presence of this oxide at the boundary promotes ceramicâmetal adhesion. In2O3 is suggested to be beneficial for the second highest fracture resistance in a previous fractural study of implant-supported crowns. Keywords: electron probe microanalysis, goldâplatinum alloy, scanning electron microscopy combined with energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy |
| Databáze: | OpenAIRE |
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