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KMID : 1035320190460020099
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Korean Society for Dental Materials
2019 Volume.46 No. 2 p.99 ~ p.108
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The effects of deproteinization and primer treatment on microtensile bond strength of self-adhesive resin cement to dentin
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Bae In-Hye
Son Sung-Ae
Park Jeong-Kil
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Abstract
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The purpose of this study was to evaluate the effects of deproteinization and an additional primer treatment on the microtensilebond strength of a newly developed self-adhesive resin cement to dentin. The occlusal dentin of extracted human third molarswas randomly divided into four groups according to the surface treatment: a control (CON) with no treatment; applying adeproteinizing agent (DPT) (5% sodium hypochlorite); using a primer (PRI) (G-CEM ONE Adhesive enhancing primer, GC);and applying a deproteinizing agent and a primer (DPT-PRI). Composite resin blocks with a disk shape (diameter, 10 mm;height, 4 mm) were bonded to the treated dentin using a self-adhesive resin cement (G-CEM ONE, GC). The specimenswere sectioned into sticks with a cross-section of 1 mm2 and tested to failure in tension mode at a crosshead speed of 1mm/min. All groups showed a significantly higher microtensile bond strength compared to CON (p<0.05). PRI showed thehighest microtensile bond strength followed by DPT and DPT-PRI (p<0.05). No significant differences were observed betweenDPT and DPT-PRI (p>0.05). Within the limitations of this study, a deproteinizing agent or specific primer can enhance themicrotensile bond strength of the self-adhesive resin cement to dentin. However, it is not recommended to use a primerin combination with the deproteinizing agents.
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KEYWORD
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Self-adhesive resin cements, Microtensile bond strength, Deproteinization, Sodium hypochlorite
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