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Micropush-out bond strengths of gutta-percha versus thermoplastic synthetic polymer-based systems – an ex vivo study

  1. B. Üreyen Kaya1,
  2. A. D. Keçeci1,
  3. H. Orhan2,
  4. S. Belli3

Article first published online: 12 DEC 2007

DOI: 10.1111/j.1365-2591.2007.01342.x

Issue

International Endodontic Journal

International Endodontic Journal

Volume 41, Issue 3, pages 211–218, March 2008

Additional Information

How to Cite

Üreyen Kaya, B., Keçeci, A. D., Orhan, H. and Belli, S. (2008), Micropush-out bond strengths of gutta-percha versus thermoplastic synthetic polymer-based systems – an ex vivo study. International Endodontic Journal, 41: 211–218. doi: 10.1111/j.1365-2591.2007.01342.x

Author Information

  1. 1

    Department of Endodontics, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey

  2. 2

    Faculty of Agriculture, Department of Animal Science, Genetic and Biometry Unit, Suleyman Demirel University, Isparta, Turkey

  3. 3

    Department of Endodontics, Faculty of Dentistry, Selcuk University, Konya, Turkey

*Bulem Üreyen Kaya, SDÜ Dişhekimliği Fakültesi, Endodonti AD, 32260 Isparta, Turkey (Tel.: +90 246 211 32 70 or +90 246 211 32 29; fax: +90 246 237 06 07; e-mail: bureyen@hotmail.com).

Publication History

  1. Issue published online: 12 DEC 2007
  2. Article first published online: 12 DEC 2007
  3. Received 7 May 2007; accepted 30 August 2007

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Keywords:

  • AH Plus;
  • Epiphany;
  • gutta-percha;
  • Ketac-Endo;
  • push-out bond strength;
  • Resilon

Abstract

Aim  To compare the interfacial strength and failure mode of root fillings consisting of different technique–material combinations.

Methodology  Human mandibular premolars (n = 144) instrumented to apical size 40 and .06 taper were divided into 12 experimental groups. The root canals were filled with either gutta-percha (groups 1–6) or Resilon (groups 7–12) core materials combined with AH Plus (groups 1, 4, 7, 10), Ketac-Endo (groups 2, 5, 8, 11) or Epiphany (groups 3, 6, 9, 12) using cold lateral compaction (groups 1–3, groups 7–9) or System B with Obtura II (groups 4–6, groups 10–12).

Three serial 1.00 ± 0.05-mm-thick root slices were prepared and push-out tests on the filling material were performed. Interactions amongst the compaction techniques, core materials and sealers were analysed using a three-way analysis of variance (anova) (P < 0.05). One-way anova and Duncan’s Multiple Range tests were used to compare the bond strengths of the 12 groups. Fracture modes of all root slices were evaluated stereomicroscopically at ×40 magnification.

Results  All the parameters except compaction techniques had significant interactions (P < 0.05). A significant difference was found amongst the groups (P < 0.05). Gutta-percha/Ketac-Endo/cold lateral compaction and gutta-percha/AH Plus/cold lateral compaction groups had the highest micropush-out bond strength values (P < 0.05). The number of overall cohesive failures was significantly more than that of adhesive failures (P < 0.05).

Conclusions  The push-out bond strengths of Resilon/Epiphany combinations were lower than those of gutta-percha/conventional root canal sealer combinations. Core materials and sealers may affect the push-out bond strengths of root canal filling materials.

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