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Microcomputed tomographic evaluation of techniques for warm gutta-percha obturation.

Hisashi Suguro1,2, Osamu Takeichi1,2, Makoto Hayashi1,2

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|April 17, 2018
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Summary

Thermafil, Obtura II, and NT condenser all effectively filled lateral canals in root canal models. Thermafil demonstrated superior obturation volume in these challenging anatomical areas.

Keywords:
lateral canalsmicro-CTobturation volumewarm vertical condensation

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Area of Science:

  • Endodontics
  • Dental Materials Science
  • Biomedical Engineering

Background:

  • Effective obturation of lateral canals is crucial for endodontic treatment success.
  • Understanding the performance of different obturation techniques in complex root canal anatomy is essential.
  • Vertical condensation methods are commonly employed for root canal filling.

Purpose of the Study:

  • To compare the effectiveness of Thermafil, Obtura II, and NT condenser in obturating lateral canals.
  • To evaluate the obturation volume achieved by different vertical condensation techniques.
  • To assess the ability of these techniques to fill accessory canals at varying depths.

Main Methods:

  • Transparent epoxy resin root canal models with simulated lateral canals were utilized.
  • Root canals were obturated using Thermafil, Obtura II, or NT condenser systems.
  • Three-dimensional microcomputed tomography (micro-CT) was employed to quantify obturation volume.
  • One-way analysis of variance (ANOVA) was used for statistical analysis.

Main Results:

  • All tested obturation methods demonstrated uniform filling of lateral canals at 1.0 and 3.0 mm from the apex.
  • Thermafil achieved significantly higher obturation volumes in the lateral canals compared to Obtura II and NT condenser.
  • Micro-CT analysis provided precise volumetric measurements for comparative assessment.

Conclusions:

  • Thermafil, Obtura II, and NT condenser are capable of filling lateral canals in simulated root canal systems.
  • Thermafil exhibits superior performance in achieving greater obturation volume within lateral canals.
  • These findings have implications for selecting optimal obturation techniques in clinical endodontics.