Thermal Behavior Variations among Commercial Gutta-percha Brands: An Optical Thermography Study

Area of Science:

• Endodontics
• Materials Science

Background:

• Gutta-percha is a primary material for root canal obturation.
• Understanding its thermal properties is essential for effective endodontic treatment.
• Variations in thermal behavior among different brands may impact clinical outcomes.

Purpose of the Study:

• To assess and compare the thermal behavior of five commercial gutta-percha brands.
• To investigate temperature differences and heat transfer characteristics at various apical distances.
• To determine the clinical implications of these thermal variations in endodontics.

Main Methods:

• Optical thermography was employed to analyze gutta-percha cones from five brands: Autofit Greater Taper, Protaper Gold F2, TruNatomy Prime, ZARC Gutta-percha points # 25/0.06, and Reciproc Blue R25.
• Thermal imaging was conducted at apical distances of 1, 2, 3, and 4 mm for cone lengths of 5 mm and 10 mm.
• Statistical analyses included Student's t-tests and Analysis of Variance (ANOVA) with a significance level of P < 0.05.

Main Results:

• Significant variations in thermal behavior were observed among the tested gutta-percha brands and cone lengths.
• TruNatomy, ZARC, and Reciproc Blue R25 showed statistically significant differences in thermal properties at various apical distances compared to Autofit Greater Taper and Protaper Gold F2.
• The average maximum temperature of the heat tip was recorded at 154.54°C, with all brands remaining within safe clinical temperature ranges.

Conclusions:

• The thermal behavior of commercial gutta-percha brands differs significantly, influencing heat transfer characteristics.
• These variations have implications for selecting appropriate gutta-percha materials in clinical endodontic practice.
• Awareness of these thermal differences can help optimize root canal obturation and improve treatment outcomes.