Abstract
Aims: The aim of this in vitro study was to evaluate the apical sealing ability of matched-taper Single- cone, Thermafil, and Cold lateral condensation obturations. Materials and Methods: Thirty-six ex- tracted human lower canine teeth were instrumented to size (F3) with ProTaper rotary instruments after cutting of their crowns to the cement-enamel junction CEJ. The working length was determined for each tooth. The teeth were divided into (3) groups (10) of each and (6) teeth were used as a positive and negative control groups. The teeth were obturated with matched-taper Single-cone, Thermafil, and lateral condensation techniques. Tgadseal was used as a root sealer in this study. A die penetration method was used to evaluate the apical seal using a stereomicroscope at 40X magnification. One-way analysis of variance and Duncan's tests were used for statistical analysis. Results: The statistical anal- ysis of the results demonstrated that there was no statistically significant difference in microleakage between the lateral condensation and Thermafil groups. The matched taper single cone showed the least microleakage with a significant difference than the other two groups. Conclusions: The apical sealing ability of Matched-taper Single-cone obturation was better than the lateral condensation and Thermafil techniques when the root canal was prepared using a ProTaper rotary instrumentation.
Highlights
The three dimensional obturation of the root canal system is widely accepted as a key factor for successful endodontic therapy
The aim of this study is to compare the apical sealing ability of matched-taper single cone, Thermafil and lateral condensation techniques in teeth prepared with ProTaper rotary instrument
The teeth in the negative control group were obturated with lateral condensation, singlecone or Thermafil techniques, and all root surfaces were covered with two layers of nail polish to ensure that there was no leakage
Summary
The three dimensional obturation of the root canal system is widely accepted as a key factor for successful endodontic therapy. Johnson introduced a technique in which alpha phase gutta-percha was placed on a metal carrier, heated and used to obtuurate the root canal .This system is commercially available as thermafil endodontic obturators.[1,3]. New file designs of rotary NiTi instruments with sharp cutting edges called ProTaper were introduced. Because of the widespread use of rotary nickel titanium systems, manufacturers have produced gutta percha cones that match the taper of the canals prepared with these systems.[4,7]. The aim of this study is to compare the apical sealing ability of matched-taper single cone, Thermafil and lateral condensation techniques in teeth prepared with ProTaper rotary instrument
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