Three-dimensional helical computed tomographic evaluation of three obturation techniques: In vitro study.

Area of Science:

• Endodontics
• Dental Imaging
• Materials Science

Background:

• Root canal obturation is crucial for endodontic treatment success.
• Evaluating obturation techniques requires precise methods to assess fill adequacy.

Purpose of the Study:

• To compare the adequacy of lateral condensation, EQ Fil (backfill), and Thermafil (core carrier) obturation techniques.
• To utilize three-dimensional (3D) helical computed tomography (CT) with volume rendering for quantitative assessment.

Main Methods:

• Thirty extracted teeth were prepared and divided into three groups for different obturation techniques.
• Helical CT scans were performed before and after obturation.
• Volume rendering technique calculated the volume of the pulp chamber and gutta-percha.

Main Results:

• Lateral condensation showed a significantly higher mean change (0.005±0.002) compared to Thermafil obturation (0.002±0.001) (P<0.05).
• Thermafil technique exhibited the least inadequacy in obturation.

Conclusions:

• Conventional lateral condensation resulted in the maximal inadequacy of root canal obturation.
• Thermafil core carrier obturation technique demonstrated the least inadequacy, indicating superior fill quality.