dental bonding, composite resin cement, dentin, surface treatment,"/> <font face="Verdana">Shear bond strength of two self adhesive composite resin cements to dentin</font>
Int J Stomatol

Inter J Stomatol

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Shear bond strength of two self adhesive composite resin cements to dentin

HE Feng1, XIE Hai -feng1, ZHU Ye1, ZHANG Fei-min1, SUN Li-jun2.   

  1. 1. Institute of Stomatology, Nanjing Medical University, Nanjing 210029,
    China
  • Received:2009-06-22 Revised:2009-10-25 Online:2010-01-20 Published:2010-01-20
  • Contact: ZHANG Fei-min

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Abstract:

Objective The objective of this study was to compare the shear bond strength of 2 simplified composite resin cements to dentin surface treated with different methods. Methods 30 selected human dentin specimens were divided into 6 groups（5 for every group） and exposed to various surface treatments: group A and B were no surface treatment, group C and D were etched with phosphoric acid for 15 s, group E and F were etched with phosphoric acid for 15 s, and then coated with one layer of One-step. Then, RelyX Unicem composite resin cements were applied on the dentin surface of group A, C and E to form column, and Biscem composite resin cements were applied on dentin surface of group B, D and F. Shear bond strength of each specimen was calculated and the dentin/composite resin cement interface was examined by a scanning electron microscope. Results Bond strength of group A and group B were significantly lower than group C, E and group D, F respectively. No
statistically significant difference was found between group C and group E, and between group D and group F. Application of RelyX Unicem showed higher bond strength than Biscem for the phosphoric acid etched dentin. Conclusion Phosphoric acid etching improved dentin bond strength of RelyX Unicem and Biscem resin cements.

Key words: dental bonding')">dental bonding, composite resin cement, dentin, surface treatment

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