This ex vivo study aimed to compare the microtensile bond strength of fiber-reinforced and particulate filler composite to coronal and pulp chamber floor dentin using a self-etching adhesive system. Coronal dentin of 40 human molar teeth was exposed by cutting occlusal enamel with a low-speed saw. Teeth were then randomly divided into two groups (n = 20). The first group was left as is, while in the second group, pulp chamber floor dentin was exposed by trepanation. After placement of a self-etching adhesive system (G-aenial Bond, GC, Tokyo, Japan), groups were further divided into two sub-groups (n = 10) according to the type of composite: fiber-reinforced composite (EP, everX Posterior, GC, Tokyo, Japan) and particulate filler composite (GP, G-aenial Posterior, GC, Tokyo, Japan). Then, composite blocks were built up. Sticks (1.0 x 1.0 mm(2)) were obtained from each specimen by sectioning, then microtensile bond strength (mu TBS) test was performed. Statistical analysis included one-way ANOVA test and Student's t-test (p < 0.05). mu TBS values were 22.91 +/- 14.66 and 24.44 +/- 13.72 MPa on coronal dentin, 14.00 +/- 5.83 and 12.10 +/- 8.89 MPa on pulp chamber floor dentin for EP and GP, respectively. Coronal dentin yielded significantly higher mu TBS than pulp chamber floor dentin (p < 0.05), independently from the tested composites.
Microtensile Bond Strength of Fiber-Reinforced and Particulate Filler Composite to Coronal and Pulp Chamber Floor Dentin / A. Baraba, S. Cimic, M. Basso, A.C. Ionescu, E. Brambilla, I. Miletić. - In: MATERIALS. - ISSN 1996-1944. - 14:9(2021 May), pp. 2400.1-2400.11.
|Titolo:||Microtensile Bond Strength of Fiber-Reinforced and Particulate Filler Composite to Coronal and Pulp Chamber Floor Dentin|
|Parole Chiave:||fiber-reinforced composite; microtensile bond strength test; particulate filler composite|
|Settore Scientifico Disciplinare:||Settore MED/28 - Malattie Odontostomatologiche|
|Data di pubblicazione:||mag-2021|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.3390/ma14092400|
|Appare nelle tipologie:||01 - Articolo su periodico|