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ORIGINAL RESEARCH
Year : 2016  |  Volume : 8  |  Issue : 8  |  Page : 843-849

Comparative Study on Microtensile Bond Strength of Silorane-based Composite in Dentin Prepared with Erbium: Yttrium Aluminum Garnet Laser versus Bur-cut


1 Associate Professor, Department of Operative and Esthetic Dentistry, Social Determinant of Oral Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
2 Operative and Esthetic Dentistry Specialist, Mashhad, Iran
3 Professor, Department of Operative and Esthetic Dentistry, Social Determinant of Oral Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
4 Operative and Esthetic Dentistry Specialist, Khorramabad, Iran
5 General Dentistry Student, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
6 General Dentistry Student, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Correspondence Address:
Zoleykha Sadat Javadi
Dahe-E-Fajr Blv. Yazd, Iran

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Source of Support: None, Conflict of Interest: None


DOI: 10.2047/jioh-08-08-02

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Background: Recently, erbium: yttrium aluminum garnet (Er: YAG) laser used for tooth preparation and silorane-based composite is a new material in dentistry so that the purpose of this study is to compare microtensile bond strength (MTBS) of silorane- based adhesive and composite (Filtek P90 silorane, 3M/USA) to dentin by Er: YAG laser irradiation versus bur cut. Materials and Methods: A total of 40 extracted human molars were flattened to obtain dentin surfaces. Mid-coronal dentin was prepared to adhesion process. The dentin (D) specimens were divided into 4 groups, according to the surface treatments: (1) D1: Laser preparation + acid etching + composite. (2) D2: Laser preparation + composite. (3) D3: Bur preparation + acid etching + composite. (4) D4: Bur preparation + composite. After application of primer and adhesive, composite builtups were created with a silorane-based composite. The composite material was irradiated with light cure (Demi/kerr/USA) for 40s. Specimens were sectioned into serial 1 mm2 sticks hour glass and MTBS was measured with universal testing machine in all sticks, 20 sticks for every group. MTBS test data were analyzed by ANOVA and post-hoc (Sheffe) test. Failure modes were determined under a stereomicroscope (ZTX-3E, Zhejiang/china) (Χ20). Failure mode distributions were analyzed by ANOVA. Results: In groups, group D3 showed the highest MTBS and groups D3, D4 that prepared by bur, showed higher bond strength results with a significant difference, than Er: YAG laser groups (D1,D2). Analysis of failure mode showed that predominantly adhesive for all tested groups. Conclusion: According to the results of this study bur preparation is preferred than laser in dentin.


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