Temperature Rises in the Pulp Chamber with Different Techniques of Orthodontic Adhesive Removal

Area of Science:

• Dentistry
• Orthodontics
• Biomaterials

Background:

• Orthodontic treatment requires resin adhesive removal post-debonding.
• Pulp chamber temperature rise during adhesive removal is a clinical concern.
• Evaluating different removal techniques is crucial for patient safety.

Purpose of the Study:

• To compare temperature rises in the pulp chamber during orthodontic resin adhesive removal.
• To assess the time required for different adhesive removal techniques.
• To determine the safety and efficiency of various burs and discs.

Main Methods:

• Five techniques were tested on extracted human premolars: high-speed burs with/without cooling, low-speed carbide burs, aluminum-oxide discs, and fiberglass burs.
• Pulp chamber temperature was measured using a thermocouple.
• Time was recorded using a digital stopwatch.

Main Results:

• A positive correlation (r=0.826) was found between time spent and temperature rise.
• Water-cooled high-speed burs (BurH-cool) resulted in the lowest temperature rise and were the fastest.
• Low-speed discs (DiscL) and fiberglass burs (BurFGL) caused significantly higher temperature rises.

Conclusions:

• Water-cooled high-speed burs (BurH-cool), high-speed burs (BurH), and low-speed burs (BurL) are safe for adhesive removal.
• Low-speed discs (DiscL) and fiberglass burs (BurFGL) may pose a risk of thermal damage to pulp tissues.
• The duration of adhesive removal directly influences pulp chamber temperature.