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ORIGINAL ARTICLE
Year : 2014  |  Volume : 8  |  Issue : 1  |  Page : 14-19

The effect of cavity preparation with erbium-doped: Yttrium-aluminum-garnet laser on marginal integrity of resin composite restoration-scanning electron microscope study


Department of Conservative Dentistry and Endodontics, Rangoonwala Dental College and Research Centre, Pune, Maharashtra, India

Correspondence Address:
Shamshe-Alam Idrisi
Department of Conservative Dentistry and Endodontics, Rangoonwala Dental College and Research Centre, Pune, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0976-2868.134113

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Aim: To evaluate the effect of cavity preparation with erbium-doped:yttrium-aluminum-garnet (Er:YAG) laser on marginal integrity on resin composite restoration. Materials and Methods: A total of 40 human extracted teeth were divided into four groups, and class-V cavity of approximately 1.5 mm depth and 2 mm width were prepared on the buccal surface of each tooth. A total of 10 samples were kept as control group where cavities were prepared with carbide bur. Rest of 30 samples were divided into three groups with 10 samples each and cavity was prepared with Er:YAG laser keeping pulse energy constant at 200 mJ and pulse duration constant at super short pulse and frequencies used for three groups were 10, 15, and 20 Hz, respectively. For control group, restorations were done using etching and bonding method, and for the three laser groups, bonding agent was applied directly and composite resin was placed. After restoration, enamel cracks and gap formations at the cavosurface margins were evaluated using scanning electron microscope (SEM) on the surface and crosscut surface of the restoration. Results: Using SEM on the surface and crosscut surface of the restoration the preparation by Er:YAG laser at frequency 10 Hz showed better marginal integrity of resin composite restoration. Conclusion: Laser group showed better cavity preparation than that with rotary carbide bur.


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