title: An in vitro study of the bond strength of five adhesives used for vinyl polysiloxane impression materials and tray materials.
abstract: Although stock trays often provide mechanical retention for elastomeric impression materials, manufacturers typically recommend the use of an adhesive, whether a stock or custom tray is used. The mention of the bond strength on the adhesive packaging is not available, therefore the clinician has no idea whatsoever of the ideal adhesive. The aim of this study was to evaluate the bond strength of three vinyl polysiloxane (VPS) materials, one with a poly(methyl methacrylate) autopolymerizing (PMMA) specimen and another with a light-polymerizing tray material (VLC), using the adhesive recommended by the manufacturer of the impression material, and two universal adhesives. A total of ninety specimens (15 × 15 × 20 mm) were used, 45 specimens were made in PMMA and rest 45 was made in VLC. Five paint-on adhesives (Coltene, Caulk, 3M, universal Zhermack and universal GC) were applied. Three impression materials, Affinis, Reprosil, and 3M, were mixed and injected into a perforated poly vinyl chloride cylinder. Tray specimens were positioned against the open cylinder end in contact with the VPS material. Tensile strength tests were conducted until adhesive separation failure. Mean values and standard errors of the adhesive strength were recorded in MPa for each material combination. GC paint-on universal adhesive provided significantly higher adhesive strength values.
authors.affiliation: Department of Prosthodontics, Institute of Dental Education & Advance Studies, Gwalior, India.
authors.forename: Surender
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Dental Avenue 2C, Madhav Chaterjee Street, Kolkata, 700020 India.
authors.forename: Udey Vir
authors.initials: UV
authors.lastname: Gandhi
authors.affiliation: Department of Prosthodontics, Awadh Dental College and Hospital, Jamshedpur, India.
authors.forename: Saurav
authors.initials: S
authors.lastname: Banerjee
keywords: GC adhesive; Tensile bond strength; VPS