Powders of dental plaster and dental stone differ mainly in____________?
Correct answer: D. Particle porosity
- A. Solubility
- B. Shelf life
- C. Chemical formula
- D. Particle porosity
Explanation
Plaster and stone have the same basic calcium sulfate hemihydrate composition, but their particles differ in porosity because of their manufacturing methods. The more porous plaster particles need more water and produce a weaker set material.
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