Temperature Changes in Gutta-Percha and Resilon Cones Induced by a Thermomechanical Compaction Technique
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Data
2009-06-01
Autores
Sant'Anna-Junior, Arnaldo [UNESP]
Tanomaru-Filho, Mario [UNESP]
Hungaro Duarte, Marco Antonio
Santos Nunes Reis, Jose Mauricio [UNESP]
Guerreiro-Tanomaru, Juliane Maria [UNESP]
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Elsevier B.V.
Resumo
Introduction: The aim of this study was to assess temperature changes in conventional gutta-percha, thermoplastic gutta-percha, and Resilon cones by using thermomechanical compaction technique. Methods: The root canals of extracted human teeth were placed in resin blocks and sectioned. After root canal preparation, cavities perforating the lingual wall were prepared at 4 and 8 mm from the apex, and K-type thermocouples coupled to a digital temperature meter were inserted until reaching the root canal. After placement of the main cone and accessory cones of each material assessed, a #45 thermomechanical compactor was used at 10,000 rpm. Data were analyzed by using analysis of variance and Tukey test for paired comparisons (P < .05). Results: A significant difference was observed between initial and maximum temperatures (mean increase, 5 degrees C-8 degrees C) with all materials (P < .05). The 3 materials showed similar temperature changes (P > .05). Changes in the apical third were higher when compared with the cervical third (P < .05). Conclusions: Our results suggest that gutta-percha and Resilon present similar temperature changes during thermomechanical compaction. (J Endod 2009;35:879-882)
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Gutta-percha, Resilon, thermal properties
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Journal of Endodontics. New York: Elsevier B.V., v. 35, n. 6, p. 879-882, 2009.