Experimental apical sealing with a new canal obturation system

Area of Science:

• Endodontics
• Dental Materials Science

Background:

• Root canal obturation is crucial for preventing bacterial microleakage.
• The Thermafil system and lateral condensation are common obturation techniques with varying clinical outcomes.
• Understanding apical seal efficacy is vital for long-term endodontic treatment success.

Purpose of the Study:

• To compare the apical sealing ability of the Thermafil obturation system versus the lateral condensation technique.
• To investigate the relationship between canal preparation file size and apical leakage in obturated root canals.

Main Methods:

• Twenty-seven root canals were obturated using the Thermafil system after conventional preparation.
• Eleven control root canals were obturated using the lateral condensation technique.
• All specimens underwent passive immersion in India ink at 37°C for 3 days.
• Roots were rendered transparent, and apical leakage was assessed stereomicroscopically.

Main Results:

• No statistically significant differences in apical leakage were observed between the Thermafil system and lateral condensation (p < 0.4).
• Stereomicroscopic evaluation revealed comparable apical seal quality between the two obturation methods.
• No correlation was found between the apical leakage and the apical file size used during root canal preparation.

Conclusions:

• The Thermafil system provides an apical seal comparable to the lateral condensation technique.
• Apical leakage in obturated root canals is not significantly influenced by the final apical file size used in preparation.
• Both techniques appear effective in achieving a seal, suggesting clinical success may depend on other factors.