temperature increase during post space preparation using different systems: an in vitro study

introduction: the purpose of this study was to evaluate external root surface temperature rise during post space preparation using la axxess bur, beefill pack system, and peeso reamer drill. materials & methods: the distal canals of forty-five extracted human permanent mandibular first molars were instrumented in crown-apical manner and obturated with lateral condensation technique. teeth were then randomly divided into three groups according to post space preparation technique including: group 1. la axxess bur (sybronendo co., ca, usa), group 2 beefill pack system (vd w co., munich, germany) and group 3 peeso reamer drill (mani co., tochigi-ken, japan). temperature was measured by means of digital thermometer mt-405 (comercio co., sao paulo, brazil) which was installed on the root surfaces. data was collected and submitted to one-way anova and post hoc analysis. results: root surface temperatures were found to be significantly higher (7.3±2.7 vs. 4.3±2.1 and 4±2.4,) in samples of beefill pack system compared with the two other groups (p<0.02). conclusion: using beefill pack system during post space preparation may be potentially hazardous for periodontal tissues.