PMID: 8600010May 1, 1995Paper

The relation between thermal and pH changes in alginate impression materials

Dental Materials : Official Publication of the Academy of Dental Materials
V AnastassiadouA Kaloyannides

Abstract

The purpose of this study was to determine if pH changes are related to thermal changes during setting in alginate impression materials, and to investigate the possibility of establishing a mathematical model between thermal and pH changes. Thermal and pH changes were recorded during the 20 min gelation period following the mixing of five commercial alginate materials. The data obtained were plotted and statistically analyzed using a student's T-test, multiplicative, linear and reciprocal analyses at a significance level of p<0.05. These analyses were used to determine the differences between various materials and to establish regression models between thermal and pH changes for each of the materials tested. For all samples, the pH values fell within the first minutes from the alkaline range into the neutral and even into the acidic range, while the initial sharp fall in temperature was followed by a subsequent gradual increase. Differences in the final gel structures of the alginate materials were shown to be related to the differences in thermal and pH changes during setting. This could be expected from their various chemical compositions such as the variety of components, the chemical forms of principal components and the pr...Continue Reading

References

Mar 1, 1991·Journal of Oral Rehabilitation·M J Tyas
Jan 1, 1989·Dental Materials : Official Publication of the Academy of Dental Materials·R LappalainenL Seppä
Apr 1, 1985·Dental Materials : Official Publication of the Academy of Dental Materials·H OtaniY Kanematsu
Jan 1, 1986·Journal of Biomedical Materials Research·W Cook
Jul 1, 1966·Journal of Dental Research·S Buchan, R W Peggie

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Citations

Oct 1, 1996·European Journal of Oral Sciences·V AnastassiadouA Kaloyannides
Aug 8, 2012·The Journal of Prosthetic Dentistry·Christina ErbeMarkus Balkenhol
Mar 6, 2018·Eye & Contact Lens·Jennifer M TurnerPaul J Murphy
Dec 20, 2005·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Gary FreyJohn Powers

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