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1 Department of Dental Materials, Indiana University School of Dentistry, Indianapolis, Ind.
The solubility of resins, cavity liners, zinc oxide and eugenol, and Kryptex in various dilute organic acids and glass distilled water was investigated.
Silicate specimens continued to show marked dissolution in citric acid, pH 4.0, even after prolonged storage time. Certain manipulative variables did not markedly affect solubility of silicate cement. Generally, the resin materials [see figure un the PDF file] tested were relatively insoluble; when the acid solutions were changed daily, an actual weight gain occurred, presumably due to the sorption of salts from the solution. Citric acid again produced the greatest dissolution of the various materials. Mixtures of zinc oxide and eugenol were not quite as soluble in lactic acid or acetic acid as either zinc phosphate or silicate cements. Kryptex appears to be less soluble than zinc phosphate cement and more soluble than silicate cement.
Submitted on April 17, 1959
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