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VOLUME 24 , ISSUE 7 ( July, 2023 ) > List of Articles


External Root Surface Temperature Control with 1,1,1,2-Tetrafluoroethane Intracanal Cryotherapy during Thermoplastic Obturation: An In Vitro Study

Chakravarthy Arumugam, Rupa Ashok, Seshan Rakkesh Ramesh, Rajeswari Kalaiselvam, Karthick Soundararajan, Mathan Rajan Rajendran

Keywords : Endodontics, Intracanal cryotherapy, Periodontal ligament, Temperature reduction, Thermoplastic obturation

Citation Information : Arumugam C, Ashok R, Ramesh SR, Kalaiselvam R, Soundararajan K, Rajendran MR. External Root Surface Temperature Control with 1,1,1,2-Tetrafluoroethane Intracanal Cryotherapy during Thermoplastic Obturation: An In Vitro Study. J Contemp Dent Pract 2023; 24 (7):419-423.

DOI: 10.5005/jp-journals-10024-3528

License: CC BY-NC 4.0

Published Online: 19-08-2023

Copyright Statement:  Copyright © 2023; The Author(s).


Aim: The aim of this in vitro study was to determine the effectiveness of 1,1,1,2-tetrafluoroethane (TFE) intracanal cryotherapy for external root surface temperature control during thermoplastic obturation. Materials and methods: Thirty extracted adult single-rooted mandibular incisors were selected for this study. Endodontic shaping was performed until size X3 Protaper Next Rotary endodontic file. The teeth were divided into three groups: Group I—Control group wherein conventional irrigation was done using physiologic saline stored at room temperature, Group II—Irrigational Cryotherapy group using physiologic saline at 2.5°C, and Group III—Intracanal TFE cryotherapy group with intracanal refrigerant TFE application. Temperatures were recorded in the apical 3 mm before and after completion of each intervention and post thermoplastic obturation using a noncontact digital laser infrared thermometer. Results: Intracanal cryotherapy with TFE resulted in a mean decrease of 9.27°C compared with conventional irrigation that exhibited in a mean decrease of 2.13°C. Also, in intracanal cryotherapy group with TFE application, compared with the baseline (24.50°C), no significant differences were observed post obturation (24.61°C) with high-temperature-injectable gutta percha technique indicating good control of temperature rise on the external root surface. Conclusion: Intracanal cryotherapy with refrigerant TFE was highly effective in controlling temperature rise on the external root surface during injectable thermoplastic obturation technique. Clinical significance: Minimizing deleterious effects due to high temperatures generated during the thermoplastic obturation is critical. Clinically feasible measures to reduce the transmission of heat generated during thermoplastic obturation have been searched since long. In this regard, intracanal cryotherapy with TFE can be effectively used to control the rise of temperature on the external root surface when employing thermoplastic obturation technique.

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