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Resumo

 

This study aimed to evaluate the temperature changes that the different methods of agitation of irrigants promote on the external dental root surface. Nine extracted human lower premolars were standardized by cone-beam computed tomography and used. The root canal was instrumented with a Reciproc 40.06 file. Temperature measurement was performed using K-type thermocouple sensors attached to the middle, cervical, and apical thirds of the teeth. The teeth had their roots immersed in distilled water at 37°C, which were distributed into 3 experimental groups according to the mechanical agitation methods to be studied. US Group (n=3), Irrisonic Ultrasonic Tip activated through ultrasound; EC Group (n=3).
[/et_pb_text][/et_pb_column][/et_pb_row][et_pb_row _builder_version=”4.22.1″ _module_preset=”default” width_tablet=”” width_phone=”100%” width_last_edited=”on|phone” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.16″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.22.0″ _module_preset=”default” custom_padding=”1px|||||” global_colors_info=”{}”]Easyclean Tip coupled to a contra-angle low-speed handpiece; XP Group (n-3), XP-endo Finisher file coupled to an endodontic electrical motor. Temperature measurements were performed simultaneously with agitation and irrigation of intracanal irrigants. Statistical analysis was performed using SPSS software with a significance level of 5%. For multiple comparisons, the Tukey test was used. The association between mechanical agitation methods and root third was statistically significant. Regarding the temperatures recorded on the external surface of the roots, the ultrasonic tip was significantly higher than the XP-endo Finisher file and the Easyclean tip, which did not differ from each other. Regarding the ultrasonic tip, the external temperature in the middle third (39.46 C) of the root was significantly lower than in the cervical (40.41°C) and apical third (40.53 C). None of the agitation methods of irrigants studied presented heating above 47°C, and their use is safe for periodontal tissues.
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Correspondence: Juliana D Bronzato, Piracicaba Dental School, State University of Campinas- UNICAMP, Department of Restorative Dentistry, Division of Endodontics, Av. Limeira 901, Bairro Areao, Piracicaba, São Paulo, CEP 13414-903, Brazil e-mail: julianadelatorre_@hotmail.com
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