Temperature ofthe pulp chamber during impression taking of full crown preparations with modelling compound

Area of Science:

• Dental materials science
• Restorative dentistry
• Biomedical engineering

Background:

• Impression taking is a critical step in fabricating full cast crowns.
• Exothermic reactions from impression materials can cause thermal stress to the dental pulp.
• Maintaining pulp vitality requires careful control of heat generated during dental procedures.

Purpose of the Study:

• To measure pulp chamber temperature elevations during impression taking with modeling compound in copper bands.
• To compare heat generation from different heating methods for copper bands.
• To determine the time required for pulp temperature to return to normal (37°C) after heating.

Main Methods:

• Full cast crown preparations were used to simulate clinical conditions.
• Copper bands containing modeling compound were heated using uncontrolled flaming, controlled flaming, and water heating.
• Thermocouples measured temperature in the pulp chamber.
• Time to return to baseline pulp temperature (37°C) was recorded.

Main Results:

• Uncontrolled flaming resulted in the highest pulp chamber temperature (53°C).
• Controlled flaming and water heating produced lower temperatures (44°C and 41.5°C, respectively).
• Significant time was required for pulp temperature to return to normal, varying with the heating method.

Conclusions:

• The method of heating copper bands for impression taking significantly impacts pulp chamber temperature.
• Uncontrolled heating poses a risk of thermal injury to the dental pulp.
• Controlled heating techniques and adequate chilling time are essential for safe impression procedures in restorative dentistry.