SciELO - Scientific Electronic Library Online

vol.21 issue1Location and angulation of curvatures of mesiobucal canals of mandibular molars debrided by three endodontic techniquesIn vitro antimicrobial activity of different gutta-percha points and calcium hydroxide pastes author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Brazilian Oral Research

On-line version ISSN 1807-3107


MANIGLIA-FERREIRA, Cláudio et al. Brazilian gutta-percha points. Part II: thermal properties. Braz. oral res. [online]. 2007, vol.21, n.1, pp.29-34. ISSN 1807-3107.

This study was undertaken to explore the effect of heating on gutta-percha, analyzing the occurrence of endothermic peaks corresponding to the transformation that occurs in the crystalline structure of the polymer during thermal manipulation. This study also seeked to determine the temperature at which these peaks occur, causing a transformation from the b- to the a-form, and from the a- to the amorphous phase. Eight nonstandardized gutta-percha points commercially available in Brazil (Konne, Tanari, Endopoint, Odous, Dentsply 0.04, Dentsply 0.06, Dentsply TP, Dentsply FM) and pure gutta-percha (control) were analysed using differential scanning calorimetry (DSC) and thermogravimetry analysis (TGA). The transition temperatures were determined and analysed. With the exception of Dentsply 0.04 and Dentsply 0.06, the majority of the products showed thermal behaviour typical of b-gutta-percha, with two endothermic peaks, exhibiting two crystalline transformations upon heating from ambient temperature to 130°. Upon cooling and reheating, few samples presented two endothermic peaks. It was concluded that heating dental gutta-percha to 130°C causes changes to its chemical structure which permanently alter its physical properties.

Keywords : Endodontics; Gutta-percha.

        · abstract in Portuguese     · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License