Comparative study of two canal obturation techniques by image analysis and EDS microanalysis

Area of Science:

• Endodontics
• Restorative Dentistry
• Dental Materials Science

Background:

• Effective root canal obturation is crucial for long-term endodontic treatment success.
• Marginal adaptation of obturation materials influences the seal and longevity of root canal fillings.
• Continuous rotation preparation systems like HERO 642(R) are widely used in endodontic procedures.

Purpose of the Study:

• To compare the marginal adaptation of two root canal obturation techniques: lateral condensation and Thermafil.
• To evaluate the presence of gaps and sealer on the root canal surface after obturation.
• To assess the penetration of sealer into dentinal tubules.

Main Methods:

• An in vitro study utilizing human teeth prepared with the HERO 642(R) continuous rotation system.
• Marginal adaptation was analyzed by quantifying gaps and root surface sealer in 12 tooth sections.
• Tubule sealer penetration was examined using backscattered scanning electron microscopy and energy dispersive spectrometry.

Main Results:

• The Thermafil technique exhibited virtually no gaps and minimal sealer on the root surface.
• Lateral condensation resulted in more gaps and greater amounts of sealer on the root surface.
• Both techniques showed tubule sealer penetration, but lateral condensation achieved deeper penetration, particularly in mid and apical root sections.

Conclusions:

• The Thermafil obturation technique provides superior marginal adaptation compared to lateral condensation.
• Thermafil appears to create a more effective seal at the root canal periphery.
• Further research may explore the clinical implications of these findings on endodontic treatment outcomes.