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ORIGINAL ARTICLE
Year : 2014  |  Volume : 17  |  Issue : 5  |  Page : 458-461

Effect of desensitizing treatments on bond strength of resin composites to dentin - an in vitro study


1 Department of Conservative Dentistry and Endodontics, National Dental College and Hospital, Derabassi, Punjab, India
2 Department of Conservative Dentistry and Endodontics, Rangoonwala College of Dental Sciences, Pune, Maharashtra, India

Correspondence Address:
Meenu Goyal
C/O Sarjiwan Kumar Jindal, Street no 7, Guru Teg Bahadur Nagar Bibi Wala Road, Bathinda - 151 001, Punjab
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.139840

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Objectives: Hypersensitivity is a common clinical multietiological problem. Many desensitizing treatments are there to overcome hypersensitivity. The aim of this study was to evaluate the effect of different dentin-desensitizing treatments on the tensile bond strength of composite restoration. Materials and Methods: Twenty-four sound human molars were used. Enamel was wet abraded to expose flat dentin surfaces, polished with sandpaper. The specimens were then divided into three groups (n = 8) based on the type of dentin-desensitizing treatment given. The first group: G1 was the control group where no desensitizing agent was used. The second group: G2 was treated with desensitizing dentifrice containing a combination of potassium nitrate, triclosan, and sodium monoflorophosphate. The third group: G3 was treated with Er:YAG laser. Afterwards, the desensitized specimens were treated with one step self-etch adhesive according to manufacturer's instructions and composite microcylinders were packed. The specimens were then examined for tensile bond strength using universal tensile machine (KMI TM ). Results: Statistical analysis of the data obtained revealed the mean values for the tensile bond strengths were 10.2613 MPa, 5.9400 MPa and 6.3575 MPa for groups 1, 2 and 3, respectively. These values were statistically significantly different between groups pretreated with laser or dentifrice as compared to control group. Conclusions: Dentifrice and Laser pre-treated dentin has lower tensile bond strength with resin composites as compared to dentin that is untreated.


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