title: Changes in pH of irreversible hydrocolloid impression materials during setting.
abstract: Two ophthalmic and four dental irreversible hydrocolloid materials were tested in vitro to determine the initial pH and changes in pH to completion of set over 4 minutes. The ophthalmic Moldite material became more basic during its setting whereas the ophthalmic Moldeye material remained stable throughout the setting. The other materials tested decreased in pH with time.
mesh_terms: D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003102:Colloids; D003760:Dental Impression Materials; D003761:Dental Impression Technique; D006863:Hydrogen-Ion Concentration; D013997:Time Factors
chemical_list: D003102:Colloids; D003760:Dental Impression Materials