ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The aim of this study was to evaluate the suitability of CaF2 doping tricalcium silicate(Ca3SiO5, C3S) as dental restorative materials. The solid state reaction method was used to prepareCaF2 doping C3S (F-C3S) using CaCO3, SiO2 and CaF2 as the starting materials. The in vitrobioactivity, the rate of heat evolution and the compressive strength were investigated. The in vitrobioactivity was examined by soaking the pastes in simulated body fluid (SBF). The FTIR and SEMresults indicated the hydroxycarbonate apatite (HCA) layers of F-C3S pastes and pure C3S pastesoccurred after soaking for 1 day and 3 days, respectively. The difference in bioactivity wasattributed to the formation of F-substituted apatite, which has a Ksp lower than HCA. As comparedwith the pure C3S, the rate of heat evolution during the hydration of F-C3S was slower. This wasavail to the dimensional stability of dental restorative materials. The pastes of F-C3S had a lowerearly compressive strength in the early stage, but a higher compressive strength in the later stage.Our results indicated that F-C3S would be bonded better to the teeth because of the earlier formationof HCA and the higher later compressive strength. F-C3S may be a progressive candidate for dentalrestorative materials
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1339.pdf
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