title: Influence of three specimen fixation modes on the micro-tensile bond strength of adhesives to dentin.
abstract: The aim of this study was to investigate in how far the way the specimen is fixed to the testing device influences the micro-tensile bond strength of adhesives to dentin. Compared to a flat jig, a notched jig enables the specimen to be aligned easier and more accurately perpendicular to the interface, thereby concentrating better the tensile stress at the actual interface. A notched jig yielded a significantly higher bond strength and the graphs showed more uniform fracture curves. On the other hand, fixation of the specimen at their top and bottom guarantees a perfect perpendicular fixation to the interface, following the specimen's length-axis. The stress-time graphs revealed a completely different stress-distribution pattern. A failure closer to the dentin-composite interface was more often seen and the coefficient of variance was the lowest. Therefore, this completely newly designed top-bottom set-up produced the most reliable bond strength data.
authors.affiliation: Leuven BIOMAT Research Cluster, Department of Conservative Dentistry, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Catholic University of Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.
authors.forename: André
authors.initials: A
authors.lastname: Poitevin
authors.forename: Jan
authors.initials: J
authors.lastname: De Munck
authors.forename: Kirsten
authors.initials: K
authors.lastname: Van Landuyt
authors.forename: Eduardo
authors.initials: E
authors.lastname: Coutinho
authors.forename: Marleen
authors.initials: M
authors.lastname: Peumans
authors.forename: Paul
authors.initials: P
authors.lastname: Lambrechts
authors.forename: Bart
authors.initials: B
authors.lastname: Van Meerbeek
mesh_terms: D001840:Dental Bonding; D003799:Dental Stress Analysis / Q000379:methods*; D003804:Dentin; D017220:Dentin-Bonding Agents; D008422:Materials Testing; D008689:Methacrylates; D019279:Resin Cements; D013048:Specimen Handling / Q000379:methods; D013718:Tensile Strength
chemical_list: D017220:Dentin-Bonding Agents; D008689:Methacrylates; C426984:One Coat Bond; C469607:OptiBond FL; D019279:Resin Cements; C041330:Scotchbond