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Effect of different surface treatment protocols on bond strength to root dentin using bulk fill restorative material

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Abstract

Purpose

Evaluate the influence of different surface treatment protocols on the bond strength of bulk fill restorative material to root dentin using the push-out test after cyclic loading.

Materials and methods

Forty intact human premolars, freshly extracted for orthodontic purpose with straight canals and fully developed apices, were selected for this study. The coronal portion of the teeth were cut perpendicular to the long axis of the teeth at the cement-enamel junction. All root canals were instrumented, cleaned, and obturated; then, a space of 3 mm in depth was prepared below the orifice level in both canals in each tooth to receive direct core bulk fill material; the specimens were classified according to the surface treatment protocol into four groups (n = 30). Group 1: no surface treatment (control group); group 2: surface treatment using Er,Cr:YSGG laser; group 3: surface treatment using chlorhexidine; and group 4: surface treatment using 17% EDTA solution. Restorations were bonded using universal adhesive following the same protocol. The roots were sectioned and three 1-mm-thick slices were obtained representing the length of the restorations inside the canals. The specimens were thermocycled, then subjected to push-out testing. A specimen from each group was examined using scanning electron microscope. Data was analyzed statistically using Kruskal-Wallis test and pairwise comparisons were carried out.

Results

The results showed that laser group was significantly higher than EDTA and chlorhexidine groups, and also higher than the control group with no significant difference. Also, the control group was significantly higher than EDTA and chlorhexidine group. However, chlorhexidine group was higher than EDTA group with no significant difference recorded (p < 0.05).

Conclusions

Er,Cr:YSGG laser showed promising results in terms of bond strength to radicular dentin. But still the control group using universal adhesive can provide comparable and satisfactory results.

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Authors and Affiliations

  1. Operative Department, Misr International University, Cairo, Egypt

    Inas El Zayat & Dina Salah Eldine

  2. Endodontic Department, Misr International University, Cairo, Egypt

    Ahmed Ghobashy

  3. Dental Laser Center, Mastership of Laser in Dentistry, Misr International University, Aachen, Germany

    Mohamed Bahgat AbdelHamid

Authors
  1. Inas El Zayat
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  2. Ahmed Ghobashy
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  3. Dina Salah Eldine
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  4. Mohamed Bahgat AbdelHamid
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Correspondence to Mohamed Bahgat AbdelHamid.

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The authors declare that they have no conflict of interest.

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This study does not include any human participants or animals. It was conducted on anonymous extracted teeth.

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El Zayat, I., Ghobashy, A., Eldine, D.S. et al. Effect of different surface treatment protocols on bond strength to root dentin using bulk fill restorative material. Laser Dent Sci 4, 89–95 (2020). https://doi.org/10.1007/s41547-020-00095-7

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  • DOI: https://doi.org/10.1007/s41547-020-00095-7

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