Srpski arhiv za celokupno lekarstvo 2013 Volume 141, Issue 9-10, Pages: 597-601
https://doi.org/10.2298/SARH1310597B
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Temperature variation on root surface with three root-end cavity preparation techniques
Bodrumlu Emre (Ondokuz Mayis University, Faculty of Dentistry, Endodontics Department, Samsun, Turkey)
Keskiner İlker (Ondokuz Mayis University, Faculty of Dentistry, Endodontics Department, Samsun, Turkey)
Sumer Mahmut (Ondokuz Mayis University, Faculty of Dentistry, Endodontics Department, Samsun, Turkey)
Telcioglu Nazife T. (Ondokuz Mayis University, Faculty of Dentistry, Endodontics Department, Samsun, Turkey)
Introduction. Thermal changes can occur on the external root surface when
root-end cavity preparation is performed, which may damage periodontal
ligament cells and alveolar bone. Objective. The purpose of this study was to
evaluate the temperature changes during preparation of the root-end cavities
at 1 and 3 mm to the sectioned apical root surfaces when either tungsten
carbide round bur, diamond round bur or ultrasonic diamond tip was used.
Methods. Root-end resection was performed at 90° to the long axis of the
root, 3 mm from the apex. Specimens were randomly divided into three groups
of 12 teeth each for three different root-end cavity preparation techniques
to be used, i.e. tungsten carbide bur, diamond bur and ultrasonic diamond
retro tip. Thermocouples were used to measure temperature changes at 1 mm
(T1) and 3 mm (T2) to the cutting plane during the preparations. Results. For
T1, the lowest and the highest mean temperature increases of 3.53°C and
4.34°C were recorded for the carbide and diamond burs, respectively. For T2,
the lowest and the highest mean temperature increases of 2.62°C and 4.39°C
where recorded for the carbide and diamond burs, respectively. The mean
temperatures with the ultrasonic tip were 3.68 and 3.04 ºC at T1 and T2
region, respectively. For root-end preparation, the ultrasonic preparation
technique took the shortest preparation time (10.25 sec) and the diamond bur
took the longest time (28.17 sec). Conclusion. Ultrasonic retro tips and burs
caused temperature to rise from 2.62° to 4.39°C, and these rises were within
safety levels.
Keywords: temperature, root-end cavity, preparation