Water sorption and solubility of different calcium hydroxide cements
AUTOR(ES)
Francisconi, Luciana Fávaro, Freitas, Anderson Pinheiro de, Scaffa, Polliana Mendes Candia, Mondelli, Rafael Francisco Lia, Francisconi, Paulo Afonso Silveira
FONTE
Journal of Applied Oral Science
DATA DE PUBLICAÇÃO
2009-10
RESUMO
OBJECTIVES: Calcium hydroxide cements have been largely used in deep cavities due to their abilities to stimulate dentin formation. However, their resistance can be relatively low and their solubility relatively high, in many instances. This study evaluated water sorption and solubility of different calcium hydroxide cements, in order to show alterations that may reduce their effectiveness. MATERIAL AND METHODS: Five discs (20 mm in diameter and 1.5 mm thick) of three different materials (Biocal®, Dycal® and Hidro C®) were prepared with the aid of a ring-shaped metallic matrix. After being stored at 37ºC for 24 h, the discs were weighed on a precision weight scale, dehydrated and weighed again. Immediately after weighing, discs were stored for a week in 50 mL of distilled water at 37ºC and, then, weighed again, dehydrated and submitted to a new weighing. The loss of soluble material and its water sorption was obtained from the difference between the initial and the final dry mass of each disc, after 1 week of immersion in water. Data were analyzed for significant differences by two-way ANOVA and Tukey's test (p<0.05). RESULTS: Mean water sorption values (g) ± standard deviation and percentage (%), for each evaluated cement, were: Biocal® (0.006 ± 0.001 / 2.15); Dycal® (0.016 ± 0.004 / 5.49); and Hidro C® (0.025 ± 0.003 / 8.27). Mean solubility values (g) ± standard deviation and percentage (%), for each evaluated cement, were: Biocal® (0.002 ± 0.001 / 0.72); Dycal® (0.013 ± 0.004 / 4.21); and Hidro C® (0.023 ± 0.004 / 7.65). CONCLUSIONS: Biocal® absorbed less water and was less soluble than the other evaluated cements; Hidro C® exhibited the highest water sorption and solubility values; and there were significant differences among all evaluated experimental groups.
Documentos Relacionados
- Solubility, porosity and fluid uptake of calcium silicate-based cements
- Water sorption, solubility and surface roughness of resin surface sealants
- One-Year Water Sorption and Solubility of All-in-One Adhesives
- Effects of solvent evaporation on water sorption/solubility and nanoleakage of adhesive systems
- Characterization of water sorption, solubility and filler particles of light-cured composite resins