Er, Özgür Trakya University - Faculty of Dentistry - Department of Endodontics, Turkey , Aslan, Tuğrul Erciyes University - Faculty of Dentistry - Department of Endodontics, Turkey , Üstün, Yakup Erciyes University - Faculty of Dentistry - Department of Endodontics, Turkey , Kılınç, Halil İbrahim Erciyes University - Faculty of Dentistry - Department of Prosthodontics, Turkey

Infrared thermal analysis of root surface temperatures during the ultrasonically activated obturation technique

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OBJECTIVE: To evaluate the temperature changes on the external root surfaces of mandibular premolar teeth during ultrasonic condensation of gutta-percha in the root canal. MATERIALS AND METHOD: Ten extracted mandibular premolar teethwere selected. The rootswere cut to a uniformlength of 14mm. Root canal treatmentswere performed using the Pro- Taper system, and themaster apical filewas a ProTaper F3 instrument. After the root canal preparations, cone-beam computed tomography images were taken to detect the thinnest dentinal area on the root. Each root was embedded in acrylic plates. For temperature measurements, the specimens were placed in a stainless steel device that was specially designed for this study. Temperature changes during obturation (warm lateral condensation using ultrasonics as the experimental group and cold lateral condensation as control) were then recorded using a thermal camera. Unpaired ttest was performed using a statistical software (α=0.01). RESULTS: There were significant differences between the groups. The mean obturation times of the specimens were 232.8 s for the experimental group and 102.5 s for the control. The mean value of the temperature increase in the experimental group was 49.96±11.12 °C; and no temperature increase was recorded for control group. The maximum temperature rises was 68.9 °C, and the minimum was 35.9 °C. The average cooling time of all samples were 17 s and did not exceed 1 min. CONCLUSION: High temperatures that may cause hazardous effects on periodontium were observed; however, average cooling times of the samples were in normal ranges (less than 1 min). Further investigations are needed for testing different power settings.

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Endodontics , gutta , percha , ultrasonics

Acta Odontologica Turcica

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