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Volume 8 , Issue 6
November/December 1995

Pages 535-540

Relationship Between pH Changes and Dimensional Stability in Irreversible Hydrocolloid Impression Material During Setting


PMID: 8595113

This study investigated the relationship between pH changes and dimensional stability during setting of irreversible hydrocolloid impression materials. Twelve specimens of seven irreversible hydrocolloid materials were used; pH readings for 20 minutes and dimensional (mass and linear) measurements for a 24-hour period were taken after mixing. The study of the curves and the comparison between them in range and in variance, together with the application of the t test, showed that pH changes were strongly related to the linear and mass changes derived fro the variety and the chemistry of the included components and their amounts.

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