title: In vitro evaluation of temperature rise during different post space preparations.
abstract: OBJECTIVE
  The aim of this study was to evaluate temperature alterations on the outer root surface during post space preparation with six different post drills by using an infrared thermometer.
  
  
  METHODS
  Sixty extracted single-rooted human mandibular incisor teeth were used. After root canal obturation, the specimens were divided into six groups (n = 10). During post space preparation, the temperature rises were measured in the middle third of the roots using a noncontact infrared thermometer with a sensitivity of 0.1°C. The temperature data were transferred from the thermometer to the computer and were observed graphically.
  
  
  RESULTS
  The maximum temperature rise was observed in Snowpost 2 (29.95 ± 10.2°C) (P < 0.001), but there were no significant differences among Snowpost 2 (29.95 ± 10.2°C), Snowpost 1 (24.6 ± 8.0°C), and Relyx 2 (17.68 ± 9.1°C) (P > 0.05).
  
  
  CONCLUSIONS
  Although water coolant used, the critical temperature rise was observed on the outer root surface in all post drill systems.
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkiye.
authors.forename: Hakan
authors.initials: H
authors.lastname: Gokturk
authors.affiliation: Department of Endodontics, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkiye.
authors.forename: Ismail
authors.initials: I
authors.lastname: Ozkocak
authors.affiliation: Department of Periodontology, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkiye.
authors.forename: Mehmet Murat
authors.initials: MM
authors.lastname: Taskan
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkiye.
authors.forename: Fatma
authors.initials: F
authors.lastname: Aytac
authors.affiliation: Department of Restorative Dentistry, Faculty of Dentistry, Gaziosmanpaşa University, Tokat, Turkiye.
authors.forename: Emine Sirin
authors.initials: ES
authors.lastname: Karaarslan
keywords: Endodontics; infrared thermometer; post space preparation; temperature increase; thermal analysis