Effect of Multiple Enamel Surface Treatments on Micro-Shear Bond Strength

Article Article scientifique Article Effect of Multiple Enamel Surface Treatments on Micro-Shear Bond Strength eng 2021-10-18 2021-10-18 author Daher René 812125 author Krejci Ivo 122923 author Mekki Mustapha 0000-0002-2345-924X 87126 author Marin Charlotte 801537 author Di Bella Enrico 948624 author Ardu Stefano 0000-0003-1641-2168 506446 3589 10.3390/polym13203589 34685348 2073-4360 PMC8541027 Objectives: The aim of this study was to evaluate the effect of different enamel surface treatments on the micro-shear bond strength. Materials and methods: Sixty-four approximal surfaces from freshly extracted molars were randomly assigned to eight groups, according to combinations of the following enamel surface treatments: ground or unground, 37.5% phosphoric acid etching time of 15 or 30 s, and with or without primer application. The same bonding agent (Optibond FL™ Adhesive, Kerr) was then used for all groups, and a 1.8 mm diameter resin composite (Harmonize™, Kerr) cylinder was built up on the bonded surface. Samples underwent a shear force test at a crosshead speed of 1 mm/min until failure. Bond strength was calculated, and failure modes were inspected under an optical microscope. Results: Bond-strength values ranged from 8.2 MPa for 15 s etched unground enamel with primer application to 19.6 MPa for 30 s etched ground enamel without primer application. ANOVA and Fisher's LSD post hoc tests revealed significant differences between the groups. Conclusions: Etching time and grinding have a statistically significant effect on the micro-shear bond strength of a three-step etch-and-rinse adhesive system on enamel. Primer application does not seem to be beneficial for enamel adhesion. Adhesion Bonding Etching time Dewey 617.6 205 Division de cariologie et d'endodontie 24P1 210 Division de prothèse fixe et biomatériaux 24Q2 false 189 Groupe Krejci Ivo (médecine dentaire) 240 Polymers 13 20 4c483487-2f03-49e1-95ce-4c38e348de3b Article (Published version) Public Article-scientifique-from-europePmc.pdf 2280801 application/pdf CC BY-4.0 openAccess Faculté de médecine / Section de médecine dentaire / Département de médecine dentaire préventive et de premier recours / Division de cariologie et d'endodontie Faculté de médecine / Section de médecine dentaire / Département de réhabilitation oro-faciale / Division de prothèse fixe et biomatériaux

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Effect of Multiple Enamel Surface Treatments on Micro-Shear Bond Strength	Polymers			2021	191	239

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