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Influence of increment thickness on dentin bond strength and light transmission of composite base materials

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Abstract

Objectives

Bulk-fill resin composites (BFCs) are gaining popularity in restorative dentistry due to the reduced chair time and ease of application. This study aimed to evaluate the influence of increment thickness on dentin bond strength and light transmission of different BFCs and a new discontinuous fiber-reinforced composite.

Materials and methods

One hundred eighty extracted sound human molars were prepared for a shear bond strength (SBS) test. The teeth were divided into four groups (n = 45) according to the resin composite used: regular particulate filler resin composite: (1) G-ænial Anterior [GA] (control); bulk-fill resin composites: (2) Tetric EvoCeram Bulk Fill [TEBF] and (3) SDR; and discontinuous fiber-reinforced composite: (4) everX Posterior [EXP]. Each group was subdivided according to increment thickness (2, 4, and 6 mm). The irradiance power through the material of all groups/subgroups was quantified (MARC® Resin Calibrator; BlueLight Analytics Inc.). Data were analyzed using two-way ANOVA followed by Tukey’s post hoc test.

Results

SBS and light irradiance decreased as the increment’s height increased (p < 0.05), regardless of the type of resin composite used. EXP presented the highest SBS in 2- and 4-mm-thick increments when compared to other composites, although the differences were not statistically significant (p > 0.05). Light irradiance mean values arranged in descending order were (p < 0.05) EXP, SDR, TEBF, and GA.

Conclusions

As increment thickness increased, the light transmission decreased for all tested resin composites. Discontinuous fiber-reinforced composite showed the highest value of curing light transmission, which was also seen in improved bonding strength to the underlying dentin surface.

Clinical relevance

Discontinuous fiber-reinforced composite can be applied safely in bulks of 4-mm increments same as other bulk-fill composites, although, in 2-mm thickness, the investigated composites showed better performance.

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Acknowledgments

This study belongs to the research activity of BioCity Turku Biomaterials Research Program (www.biomaterials.utu.fi).

Author information

Authors and Affiliations

  1. Turku Clinical Biomaterials Centre (TCBC), University of Turku, Turku, Finland

    Tarek A. Omran, Sufyan Garoushi, Lippo V. Lassila & Pekka K. Vallittu

  2. Department of Biomaterials Science, Institute of Dentistry, University of Turku, Lemminkäisenkatu 2, 20520, Turku, Finland

    Tarek A. Omran, Sufyan Garoushi, Aous A. Abdulmajeed, Lippo V. Lassila & Pekka K. Vallittu

  3. Finnish Doctoral Program in Oral Sciences (FINDOS), Institute of Dentistry, University of Turku, Turku, Finland

    Tarek A. Omran

  4. Department of Prosthetic Dentistry, Institute of Dentistry, University of Turku, Turku, Finland

    Aous A. Abdulmajeed

  5. Department of General Practice, School of Dentistry, Virginia Commonwealth University, Richmond, Virginia, USA

    Aous A. Abdulmajeed

  6. Faculty of Health and Well-being, Turku University of Applied Sciences, Turku, Finland

    Lippo V. Lassila

  7. City of Turku Welfare Division, Oral Health Care, Turku, Finland

    Pekka K. Vallittu

Authors
  1. Tarek A. Omran
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  2. Sufyan Garoushi
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  3. Aous A. Abdulmajeed
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  4. Lippo V. Lassila
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Corresponding author

Correspondence to Tarek A. Omran.

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Conflict of interest

Author Tarek A. Omran declares that he has no conflict of interest. Author Sufyan Garoushi declares that he has no conflict of interest. Author Aous A. Abdulmajeed declares that he has no conflict of interest. Author Lippo V. Lassila declares that he has no conflict of interest. Author Pekka K. Vallittu declares that he consults Stick Tech—member of GC in training and RD.

Funding

This study belongs to and was supported by the research activity of BioCity Turku Biomaterials Research Program in Turku, Finland.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

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For this type of study, formal consent is not required.

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Omran, T.A., Garoushi, S., Abdulmajeed, A.A. et al. Influence of increment thickness on dentin bond strength and light transmission of composite base materials. Clin Oral Invest 21, 1717–1724 (2017). https://doi.org/10.1007/s00784-016-1953-6

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  • DOI: https://doi.org/10.1007/s00784-016-1953-6

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