Reciprocation instrumentation, Rotary instrumentation, Temperature rise, Thermoplasticized obturation
Citation Information :
Chauhan S, Jain A, Agarwal A, Sharma R, Sharma M. Comparative Evaluation of Thermal Alterations on External Root Surface during Mechanical Instrumentation and Thermoplasticized Gutta-percha Obturation: An Ex Vivo Study. World J Dent 2021; 12 (5):367-371.
Aim and objective: The study aimed to compare temperature increase on the external root surface in coronal third, middle third, and apical third of teeth during mechanical instrumentation and thermoplasticized gutta-percha obturation using resistance temperature detector (RTD) probes.
Materials and methods: A total of 72 extracted mandibular premolar teeth were selected based on predetermined inclusion and exclusion criteria and randomly divided into two groups for measuring the temperature change by placing probes at coronal third, middle third, and apical third of external root surface during instrumentation with PTG and WOG, respectively. Both the groups were further subdivided into two subgroups consisting of 18 teeth each and temperature was recorded at three-thirds during thermoplasticized obturation with RTD during the Thermafil obturator system and E&Q injection system. The recorded temperature was statistically analyzed to evaluate the highest temperature rise during different procedures.
Results: The temperature rise during biomechanical preparation was higher with ProTaper Gold, at the middle third of root surface, followed by an apical and coronal third than WaveOne Gold. Among both thermoplasticized obturation, temperature rise with E&Q injectable system was highest, at apical third, followed by the middle and coronal third, than Thermafil system.
Conclusion: For biomechanical preparation of root canal, reciprocating WaveOne Gold system with Thermafil carrier-based obturation system should be preferred for biomechanical preparation and obturation, respectively, during root canal treatment, with respect to safety regarding temperature rise on the root surface.
Clinical significance: Biomechanical preparation and thermoplasticized obturation could lead to temperature alteration irrespective of the type of techniques. Although clinically it has been seen that the temperature alteration is within the safer range; however, it is advised that the clinician should wisely choose the appropriate instrumentation and obturation techniques to minimize the temperature application in specific clinical cases.
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