Relationship of Dentin Shear Bond Strengths to Different Laboratory Test Designs
Sabine H. Dickens, M F. Milos
Purpose: To compared different 6 shear bond test procedures using 2 primers by evaluating differences in strength and fracture surfaces. Materials and Methods: Part I 23 - factorial design evaluated the effects of (1) 2 primer systems (2) the detin moisture level, and (3) the application technique defining the bond area. The outcome of part I then led to choosing for Part II one primer system, applying the primer the entire surface with moist dentin as the substrate while comparing 6 shear test designs: (1) knife-edged chisel-on-iris; (2) similar to 1 with support added to the tooth; (3) chisel on composite plug; (4) similar to 3 with support added; (5) wire loop on composite plug; (6) modified Watanabe assembly. Results: in part I mean shear bond strengths (SBS) ranged from 14-36 Mpa. SBS was highest for either primer when it was applied to moist dentin over the entire dentin surface. Each of the factors, moisture level, primer system and application technique significantly affected SBS (3-way ANOVA, P
American Journal of Dentistry
dentin bonding, shear test designs, test parameters
and Milos, M.
Relationship of Dentin Shear Bond Strengths to Different Laboratory Test Designs, American Journal of Dentistry
(Accessed June 3, 2023)