The setting of zinc polycarboxylate dental cements is studied by the measurement of conductance as a function of time. The kinetics can be described by two parameters: an induction period, to, and a first-order reaction rate constant, k, for the decrease of conductance. The influence of molecular weight, temperature, cement-to-liquid ratio, and pre-heat treatment of zinc oxide on both parameters is studied.
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References
1.
Smith, D.C.: Improvements Relating to Surgical Cements, British Patent 1,139,430 (8 Jan. 1969); 1,300,571 (20 Dec. 1972). A New Dental Cement, Br Dent J125:381-384, 1968.
2.
Bertenshaw, B.W. and Combe, E.C.: Studies on Polycarboxylates and Related Cements. 1. Analysis of Cement Liquids, J Dent1:13-16, 1972; 2. Analysis of Cement Powders , J Dent1 :65-68, 1972.
3.
Davidson, C.L. and ten Harkel-Hagenaar , C.H.: Invloed van Water op Enige Eigenschappen van Polycarboxylaatcementen, Ned Tijdschr Tandheelk77:300-304, 1970.
4.
Phillips, R.W. : Skinner's Sciences of Dental Materials, 7th ed., Philadelphia, PA: W.B. Saunders Co., 1973, p. 470.
5.
Smith, D.C.: A Review of the Zinc Polycarboxylate Cements, J Canad Dent Assn1:22-29, 1971.
6.
Wiegman-Ho, L. : The Kinetics of the Hydration of Calcium Sulfate Hemihydrate and Cement, Investigated by an Electrical Resistance Method . Dissertation, University of Amsterdam, June, 1979.
7.
Wiegman-Ho, L. and Ketelaar, J.A.A.: The Kinetics of the Hydration of Calcium Sulfate Hemihydrate Investigated by an Electric Conductance Method , J Dent Res61:36-40, 1982.
8.
Van der Graaf, F.: Diffusion Measurements with the Gravimetric Method in Electrolyte Solutions and in Molten Salts. Dissertation, University of Amsterdam, June, 1981.
