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Uticaj višestrukog livenja na debljinu metal-keramičkog međuspoja nikl-hrom i kobalt-hrom legura.
- Source :
-
Vojnosanitetski Pregled: Military Medical & Pharmaceutical Journal of Serbia . May2008, Vol. 65 Issue 5, p365-369. 5p. 1 Color Photograph, 2 Diagrams, 2 Charts, 1 Graph. - Publication Year :
- 2008
-
Abstract
- Introduction/Aim. This research was done to establish recasting effects of nickel-chromium and cobalt-chromium alloys on the thickness of their metal-ceramic interface in making fixed partial dentures. Metal-ceramic interface determines their functional integrity and prevents damages on ceramics during mastication. Investigation of metal-ceramic samples is supposed to show if base metal alloys for metal-ceramics are successfully recycled without any risk of reduction of metal-ceramic interface thickness. Methods. The research was performed as an experimental study. Per six metal-ceramic samples of nickel-chromium alloy (Wiron99) and cobalt-chromium alloy (Wirobond C) were made each. Alloy residues were recycled through twelve casting generations with the addition of 50% of new alloy on the occasion of every recasting. Analysis Energy Dispersive X-ray (EDX) (Oxford Instruments) and Scanning Electon Microscop (SEM) analysis (JEOL) were used to determine thickness of metal-ceramic interface together with PC Software for quantification of visual informations (KVI POPOVAC). Results. Results of this research introduced significant differences between thickness of metal-ceramic interface in every examined recycle generation. Recasting had negative effect on thikcness of metal-ceramic interface of the examined alloys. This research showed almost linear reduction of elastic modulus up to the 12th generation of recycling. Conclusion. Recasting of nickel-chromium and cobalt-chromium alloys is not recommended because of reduced thickness of metal-ceramic interface of these alloys. Instead of recycling, the alloy residues should be returned to the manufacturers. [ABSTRACT FROM AUTHOR]
- Subjects :
- *CHROMIUM alloys
*CERAMIC metals
*NICKEL
*CHROMIUM
*COBALT
Subjects
Details
- Language :
- Serbian
- ISSN :
- 00428450
- Volume :
- 65
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Vojnosanitetski Pregled: Military Medical & Pharmaceutical Journal of Serbia
- Publication Type :
- Academic Journal
- Accession number :
- 32103502
- Full Text :
- https://doi.org/10.2298/VSP0805365M