Influence of substrate, shape, and thickness on microtensile specimens' structural integrity and their measured bond strengths

Dental Materials : Official Publication of the Academy of Dental Materials
Cecilia GoracciMarco Ferrari

Abstract

To verify whether substrate, shape, or thickness of microtensile specimens have a significant influence on their measured bond strength. Sixty-four extracted molars provided microtensile specimens, which were prepared on enamel and dentin, in different shapes and thicknesses. The teeth were randomly divided into 16 groups (n = 4). Groups 1-8 included hourglass-shaped specimens. In Groups 1-4 specimens were prepared from enamel and in a thickness at the bonding interface of 0.5 mm x 0.5 mm, 1 mm x 1 mm, 1.5 mm x 1.5 mm, and 2 mm x 2 mm, respectively. In these same thicknesses, hourglasses were trimmed in Groups 5-8, but the specimens were prepared from dentin. Groups 9-16 included specimens obtained following the non-trimming technique. Groups 9-12 provided enamel sticks in the four evaluated thicknesses. In these same thicknesses and shape but from dentin were cut the specimens of Groups 13-16. Two specimens from each group were viewed using a scanning electron microscope. On the other ones, microtensile bond strength was measured and the values were statistically analyzed. Substrate, shape, and thickness of the specimens had a significant effect on their recorded bond strength (p < 0.05). Higher bond strength values were recor...Continue Reading

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Citations

Nov 3, 2007·Photomedicine and Laser Surgery·Marcella Esteves-OliveiraNorbert Gutknecht
Oct 25, 2008·The Angle Orthodontist·Samir E BisharaJohn J Warren
Oct 12, 2007·Journal of Oral Science·Satoshi UekusaMasashi Miyazaki
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Jul 15, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Haiyan LiAlex Siu-Lun Fok
May 13, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Haiyan LiAlex Siu-Lun Fok
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Jul 9, 2004·Dental Materials : Official Publication of the Academy of Dental Materials·Cecilia GoracciMarco Ferrari
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Apr 14, 2005·Dental Materials : Official Publication of the Academy of Dental Materials·Cecilia GoracciMarco Ferrari
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