Tensile Bond Strength of Resin Composite to Er,Cr:YSGG Lased Dentin Bonded With Different Adhesive Systems

Ula Fathi,Ma,An Nayif

doi:10.33899/rden.2015.160886

Abstract

Aims: Tensile bond is important for assessing the success of adhesive reﬆorative materials. The aim of this ﬆudy is to evaluate the tensile bond ﬆrength of resin composite reﬆoration to Er,Cr:YSGG lased dentin bonded with three types of adhesive syﬆems. MATERIALS AND METHODS: Occlusal enamel of eighteen molars samples was removed to expose the underlining dentine. Er,Cr:YSGG laser irradiation was performed to central dentin. Samples were assigned randomly to three groups (N = 6): Group Ι: dentin was treated total etch adhesive (Adper single bond, 3M ESPE); Group II: treated with all in one self—etch adhesive (Adper easy one, 3M ESPE); Group III: treated with two ﬆep self—etch adhesive (Clearﬁl SE bond, Kurary). A translucent plaﬆic tube was ﬁxed and ﬁlled incrementally with hybrid resin then small metal screw with ring head was embedded in laﬆ increment. Samples were ﬆored in diﬆilled water at 37°C for 24 hours. Tensile bond ﬆrength was measuredd using universal teﬆing machine (Digital Force Gauge IMADA CO., LTD, Japan), the failure mode was evaluated. Then ﬆatiﬆical analysis was done include descriptive, one way analysis of variance teﬆ, and Poﬆ Hoc teﬆs. RESULTS: A signiﬁcant diﬀerences in tensile bond ﬆrength were observed among groups (p < 0.05). Total etch adhesive bonded demonﬆrate signiﬁcantly higher tensile bond ﬆrength value than one ﬆep self–etch and two ﬆep self–etch adhesives (p < 0.05). No signiﬁcant diﬀerences were observed between one ﬆep self–etch and two ﬆep self–etch adhesives (P>0.05). CONCLUSION: The tensile bond ﬆrength of resin composite to Er,Cr:YSGG lased dentin was inﬂuenced by adhesive type. Total etch adhesive bonded had higher tensile bond ﬆrength than one ﬆep and two ﬆeps self–etch adhesives.

Highlights

Development in dentistry has been focused on using lasers for cavity preparation due to many advantages like the absence of pressure, vibration, noise, or significant pain,(1) and allows selective removal of carious tooth structure.[2]
In particular Hossain et al asserted that acid resistance can be promoted by Er,Cr:YSGG laser irradiation[16]
Cardoso et al concluding that irregularities on the lased dentin surface may decrease the bond strength due to a non-uniform thickness of the adhesive layer.[17,18] the increased of temperature produced by laser modified the surface, in which the collagen network completely melted and vaporized

Summary

Introduction

Development in dentistry has been focused on using lasers for cavity preparation due to many advantages like the absence of pressure, vibration, noise, or significant pain,(1) and allows selective removal of carious tooth structure.[2]. Varies dentin adhesive systems are used in dental practice: Some utilize phosphoric acid to remove the smear layer, followed by adhesive material. This bonding mechanism eliminate smear layer on dentin and form micromechanical interlocking of the resin within the exposed collagen fibril. [11] Self-etching is another adhesives that perform substrate etching and infiltration simultaneously It provides resin infiltration beyond the smear-covered surface into the underlying dentin matrix. One-step self-etch adhesives include all components in one bottle to reduce clinical application time and lessen the complexity of the application technique.[13]

Methods

Results

Conclusion