In vitro investigation of influence of temperature rising on periodontal tissue during endodontic treatment

Abstract

SUMMARY Various manipulations during endodontic treatment and restoration of endodontic treated teeth can be asso-ciated with increase of the temperature in dental structure and periodontal tissue. These manipulations include: me-chanical root canal preparation, obturation with warm condensation techniques, root – canal preparation for radicular post. The critical level of temperature, that doesn't cause irreversible consequences is 43°C. The aim of this study is to investigate the temperature changes on external root surface during endodontic treatment depend-ing of dentin thickness. Thirty six single -rooted, human teeth extracted for prosthetic or periodontal reasons were selected for this study. Teeth were divided into four groups-nine teeth in each one. The temperature changes during mechanical root canal preparation, vertical warm condensation, continious wave of condensation and root canal preparation for radicular post are explored and the results are presented. INTRODUCTION Various manipulations during endodontic treatment and restoration of endodontic treated teeth can be asso-ciated with increase of the temperature in dental structure and periodontal tissue. During thermoplastic methods of condensation the plastification of gutta-percha leads to rise of temperature on external and internal root surface (1,3,6,7). This may injure the cementum, periodontal lig-ament and alveolar bone. It has been found that the alka-line phosphatise in bone can be inactivated at 56°C,