Naslov
Ion elution of laser-welded Co-Cr denture base metal alloys

Autori
Jelinić Carek, Andreja ; Živko Babić, Jasenka ; Jakovac, Marko ; Badel, Tomislav ; Crnojević, Helena ; Bago, Ivona

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
IADR/PER Congress : abstracts ; u: Journal of Dental Research 93(S.I. C) / - , 2014

Skup
IADR/PER Congress Dubrovnik, 2014

Mjesto i datum
Dubrovnik, Hrvatska, 10.09.2014. - 13.09.2014

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Alloys; Biocompatibility; Corrosion; Lasers and Metals

Sažetak
Objective: The goal of this study was to determine the concentration of Co, Cr and Ni eluted ions from laser welds of partial denture Co-Cr alloys. Method: Preparation of three Co- Cr dental alloys (Wisil M-Austenal, Köln, Germany ; I-MG-Interdent, Celje, Slovenia ; Brealloy F-400- Bredent, Senden, Germany) was performed according to ISO 6871-1 for static immersion test. The specimens were divided into two groups. The first group of samples was welded with Nd:YAG laser (Hercules ; Interdent, Celje, Slovenia) and second, unwelded, was used as a control group. The surfaces of the patterns were measured with accuracy of 0.1 cm2. The samples were exposed to the aqueous solution (0, 1mol/l lactic acid and 0, 1 mol/l sodium chloride) for 7 days at 37±1 °C. Ions elution was electrochemical tested by atomic absorption spectroscopy. Microstructure was analyzed before and after immersion test. After immersion, the samples surfaces were analyzed by scanning electron microscope TESCAN, Vega TS5136LS (Tescan, Brno, Czech Republic) with EDS system. Result: Elution of Co and Cr ions was statistically greater from laser welds. Nickel ions were found in both solutions, despite no declaration in analyzed alloys composition. Microstructure and SEM showed no differences before and after immersion test. In laser welds the cracks were visible. EDS analyses proved ions of Co, Cr, S, Hg and Si in laser welds, and Co, Cr, Mn, Mo, Si and C in control specimens. Conclusion : Laser welds proved less corrosion resistance because of cracks obtained during welding. The results suggest the control of working parameters during the welding.

Izvorni jezik
Engleski

Znanstvena područja
Dentalna medicina

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