title: Viscosity and adhesion strength of cream-type denture adhesives and mouth moisturizers.
abstract: We evaluated adhesion strength to acrylic resins under various experimental conditions and viscosity of 4 cream-type denture adhesives and 2 mouth moisturizers. The viscosity was determined by a sine-wave vibro viscometer. The adhesion strength tests were performed with 2 resin plates at a universal tester. In Method A, various constant thicknesses of material layer were tested and tensile strength was measured, while in Method B a constant load was applied before measurement. Five tests were carried out for each measurement. With Method A, adhesion strength increased exponentially as the layer got thin. Effect of the material thicknesses (contribution ratio ρ=79.0%) was much larger than that of material type (ρ=15.3%). Materials with higher viscosity had greater levels of adhesion strength in Method A, whereas those with the higher viscosity had lower levels of adhesion strength in Method B. Adhesion strength was significantly affected by the experimental condition prior to applying tension.
authors.affiliation: Department of Prosthetic Dentistry, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki 852-8588, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Kano
authors.forename: Tadafumi
authors.initials: T
authors.lastname: Kurogi
authors.forename: Takaharu
authors.initials: T
authors.lastname: Shimizu
authors.forename: Masahiro
authors.initials: M
authors.lastname: Nishimura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Murata
mesh_terms: D000180:Acrylic Resins; D000268:Adhesiveness; D000269:Adhesives; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003822:Denture Liners; D003781:Denture Retention; D008422:Materials Testing; D012464:Saliva, Artificial / Q000737:chemistry; D013718:Tensile Strength; D014783:Viscosity; D014906:Wetting Agents
chemical_list: D000180:Acrylic Resins; D000269:Adhesives; D012464:Saliva, Artificial; D014906:Wetting Agents