Temperature Changes in Gutta-Percha and Resilon Cones Induced by a Thermomechanical Compaction Technique

Autor(es)

Sant'Anna-Junior, Arnaldo ^[1] ; Tanomaru-Filho, Mario ^[1] ; Hungaro Duarte, Marco Antonio ^[2] ; Santos Nunes Reis, Jose Mauricio ^[3] ; Guerreiro-Tanomaru, Juliane Maria ^[1]

Afiliação do(s) autor(es)

^[1] UNESP, Araraquara Dent Sch, Dept Restorat Dent, Araraquara, SP - Brazil

^[2] Sagrado Coracao Univ, Bauru Dent Sch, Dept Dent, USC, Bauru, SP - Brazil

^[3] UNESP, Araraquara Dent Sch, Dept Prosthesis, Araraquara, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENDODONTICS; v. 35, n. 6, p. 879-882, JUN 2009.
• Citações Web of Science: 11

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) (AU)

• Processo FAPESP: 07/00424-4 - Avaliação da termoplastificação de diferentes guta-perchas, Resilon e dos sistemas Microseal e TC e da capacidade de preenchimento de canais laterais empregando técnica termoplástica de obturação
• Beneficiário: Mario Tanomaru Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular