Temperature Profiles Along the Root with Gutta-percha Warmed through Different Heat Sources

Area of Science:

• Endodontics
• Dental Materials Science

Background:

• Warm compaction is a technique used for filling root canals with thermoplastic gutta-percha.
• Understanding temperature distribution within the root during this process is crucial for successful treatment.
• Heat sources like System B and System MB are commonly used for warm compaction.

Purpose of the Study:

• To compare the temperature profiles generated in the root during warm compaction of gutta-percha using System B and System MB heat sources.
• To evaluate the effectiveness of these heat sources in achieving adequate gutta-percha softening for root canal filling.

Main Methods:

• Thirty extracted human incisor teeth were prepared and imaged using micro-CT.
• Root canals were instrumented and filled with thermoplastic gutta-percha.
• Temperature profiles were recorded using K-type thermocouples and a data acquisition system during warm compaction with System B and System MB.

Main Results:

• Both System B and System MB resulted in temperatures slightly above 40°C at the root apex when the plugger was 3 mm from the apex and set at 180°C.
• Higher temperatures were recorded in the coronal portion of the root compared to the apical region for both systems.
• System MB maintained a temperature above 40°C for a longer duration at the apex compared to System B.

Conclusions:

• System MB offers a longer period above 40°C, facilitating adequate warm compaction of gutta-percha.
• Both systems can achieve sufficient gutta-percha softening for root canal filling.
• Temperature distribution varies within the root during warm compaction, with higher temperatures coronally.