The effect of aqueous media on the mechanical properties of fluorapatite-mullite glass-ceramics

Dental Materials : Official Publication of the Academy of Dental Materials
S MollazadehAkbar Fazel

Abstract

To verify the effects of alternating thermal changes in aqueous media and chemical composition on mechanical properties of apatite-mullite glass-ceramics and to investigate concentration of ions eluted from glass-ceramics in aqueous media. The glass compositions were from SiO2Al2O3P2O5CaOTiO2BaOZrO2CaF2 system. Glass-ceramics were prepared by heat-treating at 1100°C for 3h samples alternately immersed in water at 5 and 60°C. The 3-point bending strength (n=10) were determined using 3×4×25mm/bar and a universal testing machine, at a cross-head speed of 0.1mm/min. Vickers micro hardness were evaluated by applying a total of 15-20 indentations under a 100g load for 30s. Concentrations of ions eluted from glass-ceramics immersed in 60±5°C double distilled water were determined by ion chromatography. The toxicity of glass-ceramics was assessed by seeding the osteosarcoma cells (MG63) on powder for different days and their cell proliferation assessment was investigated by MTT assay. The data were analyzed using one way analysis of variance and the means were compared by Tukey's test (5% significance level). The highest flexural strength and hardness values after thermal changes belonged to TiO2 and ZrO2 containing glass-ceramics whic...Continue Reading

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Jun 24, 2004·Dental Materials : Official Publication of the Academy of Dental Materials·Catherine M Gorman, Robert G Hill
Dec 1, 2006·Dental Materials : Official Publication of the Academy of Dental Materials·Qijun XiangXiaohong Dan
May 21, 2010·Journal of Applied Oral Science : Revista FOB·Vanessa Zulema S CcahuanaMarco Antonio Bottino
Jun 24, 2010·Biomedical Materials·Leila MontazeriSayfoddin Javadian

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Citations

Nov 1, 2016·Journal of Biomedical Materials Research. Part a·Maziar Montazerian, Edgar Dutra Zanotto

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