title: The effect of powder/water ratio of irreversible hydrocolloid on the bond strength of irreversible hydrocolloid and agar combinations.
abstract: This study investigated the effect of powder/water ratios of irreversible hydrocolloid on the tensile bond strength of several irreversible hydrocolloid and agar combinations. Each irreversible hydrocolloid was prepared in three different powder/water ratios as follows: (1) normal recommended ratio, (2) 10% more water than normally recommended, and (3) 10% less water than normally recommended. The irreversible hydrocolloid and the agar were joined together in a special loading assembly, which was subjected to tensile loading. The results suggest that except for one irreversible hydrocolloid and agar combination the powder/water ratio had no significant effect on the bond strength. In addition, the results indicate that for a successful bond it is important to choose not only a reformulated agar but a compatible irreversible hydrocolloid.
authors.affiliation: Department of Biologic and Materials Sciences, University of Michigan, School of Dentistry, Ann Arbor.
authors.forename: I
authors.initials: I
authors.lastname: Lewinstein
authors.forename: R G
authors.initials: RG
authors.lastname: Craig
mesh_terms: D000362:Agar; D000464:Alginates; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003102:Colloids; D001840:Dental Bonding; D003799:Dental Stress Analysis; D008422:Materials Testing; D011208:Powders; D013718:Tensile Strength; D014783:Viscosity; D014867:Water
chemical_list: D000464:Alginates; D003102:Colloids; D011208:Powders; D014867:Water; D000362:Agar