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   Offical Journal of The Academy of Osseointegration

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Volume 35 , Issue 5
September/October 2015

Pages e66-e74

Effects of Dentin Surface Treatments on Hypersensitivity to Bond Strength of Restorations: An In Vitro Study

Ayça Tulga, DDS, PhD/Duygu Saraç, DDS, PhD

PMID: 26357704
DOI: 10.11607/prd.2194

This study evaluated the effects of desensitizing treatments on the shear bond strength (SBS) of adhesive resin cement (Rely X U100) applied to dentin. Human molars (n = 120) with exposed dentin were divided into 12 groups. In the experimental groups, dentin surfaces were treated with (1) an erbium:yttrium– aluminium–garnet (Er:YAG) laser, (2) a neodymium:yttrium–aluminium–garnet (Nd:YAG) laser, (3) glutaraldehyde (Gluma)–, (4) fluoride (Aqua Prep-F)–, and (5) oxalate (BisBlock)–containing desensitizing agents, (6) Gluma preceding the Er:YAG laser, (7) Aqua Prep-F preceding the Er:YAG laser, (8) BisBlock preceding the Er:YAG laser, (9) Gluma preceding the Nd:YAG laser, (10) Aqua Prep-F preceding the Nd:YAG laser, (11) and BisBlock preceding the Nd:YAG laser, in groups EL, NL, G, F, O, EL-G, EL-F, EL-O, NL-G , NL-F, and NL-O, respectively. Then, lithium disilicate ceramics were cemented to the treated surfaces. Subsequently, an SBS test was performed and the data were statistically analyzed (α = .001). The results suggested that the combined treatment of Gluma preceding Er:YAG laser increased the bond strength of ceramic to the dentin surface using a self-adhesive resin cement.

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