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The influence of Al/Si ratio and post melting thermal treatment on the reactivity of aluminate –silicate glasses used for dental cements preparation

G. VOICU1,* , A. BADANOIU1

Affiliation

  1. Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica Bucharest, Romania

Abstract

The influence of both glass powders composition (Al/Si ratio) and post-melting treatment temperature on some of the properties (setting time, compressive strength and solubility) of the silicate dental cements was investigated. Two silicate cements were used in this study. The properties of the studied cements comply with the required for dental cements regarding the setting time, mechanical strength and solubility. In order to study the interaction processes X-ray diffraction analyze (XRD), scanning-electron microscopy (SEM) and electron-dispersion spectroscopy (EDS) analyses were used. The reactivity of the tested aluminate-silicate glasses towards the partial neutralized ortho-phosphoric acid solution increases with the increase of the Al/Si ratio. The glass powder reactivity can be reduced by supplementary thermal treatments at low temperatures (600oC). The silicate cements could be used for anterior restoration due to their high aesthetic properties..

Keywords

Silicate dental cement, Silicate-aluminate glass, Al/Si ratio, Post melting thermal treatment.

Submitted at: Jan. 28, 2009
Accepted at: May 28, 2009

Citation

G. VOICU, A. BADANOIU, The influence of Al/Si ratio and post melting thermal treatment on the reactivity of aluminate –silicate glasses used for dental cements preparation, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 5, pp. 750-754 (2009)