Temperature Increase during Different Post Space Preparation Systems: An In Vitro Study.
BACKGROUND
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.


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).


CONCLUSIONS
Using Beefill pack System during post space preparation may be potentially hazardous for periodontal tissues.
Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran.
Kiumars
K
Nazari Moghadam
Department of Oral and Maxillofacial Radiology, Dental School, Shahed University of Medical Sciences, Tehran, Iran.
Shahriar
S
Shahab
Dental Student, Shahed University of Medical Sciences, Tehran, Iran.
Soghra
S
Shirvani
Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran.
Ali
A
Kazemi
Periodontal Ligament; Post Technique; Root Canal Preparation Tooth Fracture; Root Canal Therapy