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Glass-ionomer Cements of Improved Flexural Strength
H.J. Prosser
Laboratory of the Government Chemist, Cornwall House, Waterloo Road, London, England SE1 8XY
D.R. Powis
Laboratory of the Government Chemist, Cornwall House, Waterloo Road, London, England SE1 8XY
A.D. Wilson
Laboratory of the Government Chemist, Cornwall House, Waterloo Road, London, England SE1 8XY
The effect of glass and polyacid composition on cement strength has been investigated with a view to improving the glass-ionomer cements. The flexural strength of glass-ionomer cements was found to be greatly dependent on the glass and polyelectrolyte used to prepare them. Opaque and opal glasses containing crystallites tended to yield cements with high flexural strength. Flexural strength was also found to be increased by increasing the molecular weight of the polyacid. In water-setting systems, cement strength was shown to be critically dependent on the glasslpolyacid ratio.
REFERENCES
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- Crisp, S.; Kent, B.E.; Lewis, B.G.; Ferner, A.J.; and Wilson, A.D. (1980): Glass-ionomer Cement Formulations. II. The Synthesis of Novel Polycarboxylic Acids, J Dent Res 59:1055-1063.[Abstract/Free Full Text]
- Kent, B.E.; Lewis, B.G.; and Wilson, A.D. (1979): Glass-ionomer Cement Formulations. I. The Preparation of Novel Fluoroaluminosilicate Glasses High in Fluorine, J Dent Res 58:1607-1619.[Abstract/Free Full Text]
- McLean, J.W. and Wilson, A.D. (1977a): The Clinical Development of the Glass-ionomer Cements. I. Formulations and Properties, Aust Dent J 22:31-36.
- McLean, J.W. and Wilson, A.D. (1977b): The Clinical Development of the Glass-ionomer Cements. II. Some Clinical Applications, Aust Dent J 22:120-127.[Medline]
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- McLean, J.W. and Wilson, A.D. (1977c): The Clinical Development of the Glass-ionomer Cements. III. The Erosion Lesion, Aust Dent J 22:190-195.[Medline]
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- Wilson, A.D.; Crisp, S.; Prosser, H.J.; Lewis, B.G.; and Merson, S.A. (1980): Aluminosilicate Glasses for Polyelectrolyte Cements, Ind Eng Chem Prod Res Dev 19:236-270.
Journal of Dental Research, Vol. 65, No. 2,
146-148 (1986)
DOI: 10.1177/00220345860650021101

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