Relationship between pH changes and dimensional stability in irreversible hydrocolloid impression material during setting
Anastassiadou, V.; Dolopoulou, V.; Kaloyannides, A.
International Journal of Prosthodontics 8(6): 535-540
1995
ISSN/ISBN: 0893-2174 PMID: 8595113 Document Number: 444610
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 from the variety and the chemistry of the included components and their amounts.