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Er,Cr:YSGG laser influence on microleakage of class V composite resin restorations

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Abstract

One of the most challenging issues following restoration is microleakage. The aim of this study was to investigate the effects of Er,Cr:YSGG laser with and without acid etching on microleakage of class V composite restorations. A total of 68 human intact premolars were selected, disinfected, and randomly allocated to four experimental groups (n = 16) as well as positive and negative controls (n = 2 each). Dimensionally, similar class V cavities were prepared on buccal surface of each tooth under the following conditions: group 1, bur cavity preparation and chemical etching (BE); group 2, bur cavity preparation and Er,Cr:YSGG laser conditioning (BLc); group 3, Er,Cr:YSGG laser cavity preparation and chemical etching (LE); and group 4, Er,Cr:YSGG laser cavity preparation and Er,Cr:YSGG laser conditioning (LLc). All samples were restored with composite. The teeth were sealed and immersed in 1 % methylene blue for 48 h before being sectioned. The microleakage evaluation was done under a stereomicroscope (×20). The leakage scores were recorded and Kruskal–Wallis and Mann–Whitney tests were used for statistical evaluations. The highest microleakage score was seen in gingival margins of group 4 (LLc) and the lowest in occlusal margins of group 3 (LE). The overall difference in leakage scores among the groups was statistically significant (p < 0.001) with gingival margins showing a significantly higher score than its occlusal counterparts (p < 0.001). It was noted that less microleakage could be achieved when cavities were prepared by laser compared to bur. In addition, less microleakage was seen in acid-etched cavities than laser-conditioned counterparts.

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Authors and Affiliations

  1. Private Practice, Tehran, Iran

    Tahereh Fattah

  2. Department of Operative Dentistry, Dental Faculty of Azad University, 10th Neyestan, Pasdaran Street, Tehran, Iran

    Haleh Kazemi

  3. Laser Research Center in Medical Sciences (LRCMS), AJA University of Medical Sciences, Tehran, Iran

    Reza Fekrazad

  4. Department of Endodontics, School of Dentistry, Shahed University, Tehran, Iran

    Hadi Assadian

  5. Laser Research Center in Dentistry (LRCD), Dental Faculty, Tehran University of Medical Sciences, Tehran, Iran

    Reza Fekrazad & Katayoun A. M. Kalhori

Authors
  1. Tahereh Fattah
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  2. Haleh Kazemi
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  3. Reza Fekrazad
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  4. Hadi Assadian
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  5. Katayoun A. M. Kalhori
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Corresponding author

Correspondence to Reza Fekrazad.

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Clinical relevance statement

It is believed that minimized microleakage of restorative materials can lead to optimal clinical performance in terms of preventing marginal discoloration, secondary caries, and pulpal pathology. This study compares use of laser in preparing and conditioning class V cavities with conventional techniques in terms of reducing microleakage.

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Fattah, T., Kazemi, H., Fekrazad, R. et al. Er,Cr:YSGG laser influence on microleakage of class V composite resin restorations. Lasers Med Sci 28, 1257–1262 (2013). https://doi.org/10.1007/s10103-012-1200-6

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  • DOI: https://doi.org/10.1007/s10103-012-1200-6

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