Does surface treatment of demineralized dentin impact on shear bond strength?

Fatemeh Rezaei Fatemeh Rezaei,Horieh Moosavi Horieh Moosavi,Atefeh Nemati-Karimooy Atefeh Nemati-Karimooy

doi:10.30574/wjbphs.2021.6.2.0045

Fatemeh Rezaei Fatemeh Rezaei, Horieh Moosavi Horieh Moosavi + Show 1 more

Open Access

https://doi.org/10.30574/wjbphs.2021.6.2.0045

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Abstract

Aim: This study investigated the effect of various surface treatments on the bond strength of a universal adhesive to demineralized dentin. Materials and Methods: Human dentin surfaces of forty-eight carries-free maxillary premolars were prepared and demineralized by acidic solutions. Teeth were randomly distributed into four groups (n=12) getting different surface treatments. Three minutes application of a CPP‑ACP (group 1), Er: YAG laser irradiation (group 2), Er: YAG laser irradiation combined with three minutes application of CPP‑ACP (group 3), no treatment (group 4). Thereafter composite tube (Filtek TM Ultimate, 3M ESPE) bonded to the testing surfaces via universal adhesive; Single Bond Universal and the Shear Bond Strength (SBS) measured. Data were analyzed utilizing ANOVA and Tukey tests (P<0.05). Results: Only application of CPP-ACP and Er: YAG laser radiation, resulted in the highest and lowest SBS respectively (p<0.001). Bond strength after irradiation of Er: YAG laser combined with three minutes application of CPP‑ACP was a little more than laser alone. Conclusion: The application of CPP-ACP could increase the SBS of universal adhesives used to demineralized dentin. Laser irradiation application has an adverse effect on SBS.

Highlights

Developments in the field of adhesive dentistry have made numbers of changes in cavity preparations
Bond strength after irradiation of Er: YAG laser combined with three minutes application of CPP-ACP was a little more than laser alone
The application of CPP-ACP could increase the Shear Bond Strength (SBS) of universal adhesives used to demineralized dentin

Summary

Introduction

Developments in the field of adhesive dentistry have made numbers of changes in cavity preparations. In the sequence of tooth preparation, it is desirable removing only infected dentin, leaving affected that may be remineralizable dentin Albeit this influenced dentin has an unblemished collagen grid and no microscopic organisms, its mineral substance has marked down which brought about lower bond strength costs than typical dentin. Since the suitable bonding of tooth-colored materials to the tooth structure has a primary impact in the durability and viability of direct composite rebuilding efforts, strategies that lead to expanded bond strength have consistently been considered. These days, laser illumination is another innovation in treatment of dental caries. The sort and boundaries of the laser, the kind of dental substrate, the applied adhesive system and even the test used to assess the bond strength, all are compelling elements. [6,7,8]

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