Accelerated and Retarded Dental Plaster Setting Investigated by X-Ray Diffraction

Author:

Harcourt J.K.1,Lautenschlager E.P.1

Affiliation:

1. Northwestern University Dental School, Chicago, Illinois 60611

Abstract

Continuous monitoring of calcium sulfate hemihydrate and dihydrate X-ray diffraction peaks was done to determine the kinetics of gypsum-product formation during the setting of plaster mixtures containing various concentrations of accelerators and retarders. Amounts of product formation were then correlated to Gillmore setting times and to compressive strengths.

Publisher

SAGE Publications

Subject

General Dentistry

Reference6 articles.

1. Setting Reactions of Gypsum Materials Investigated by X-Ray Diffraction

2. Hygroscopic Expansion

3. Hardness and flow properties of gypsum materials

4. Skinner, E.W., and Phillips, R.W.: The Science of Dental Materials, 5th ed, Philadelphia : W. B. Saunders Co., 1960, p 37.

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1. Delayed linear dimensional changes of five high strength gypsum products used for the fabrication of definitive casts;The Journal of Prosthetic Dentistry;2012-09

2. Delayed setting and hygroscopic linear expansion of three gypsum products used for cast articulation;The Journal of Prosthetic Dentistry;2009-11

3. Dental Materials;Ullmann's Encyclopedia of Industrial Chemistry;2006-04-15

4. Dental Materials;Ullmann's Encyclopedia of Industrial Chemistry;2000-06-15

5. Freeze-drying and scanning electron microscopy of setting dental gypsum;Dental Materials;1995-07

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