To compare apical quality of root fillings completed using warm vertical compaction and cold lateral compaction.
Materials and Methods:
Forty extracted single-rooted human mandibular teeth were instrumented with System GT Rotary files (Dentsply, Maillefer, Switzerland) and Mtwo NiTÝ system files (WDW GmbH, Germany )(n= 20 each). Following removal of smear layer, teeth were randomly divided into four groups for filling as following (n= 10) ; group 1: System GT + cold lateral compaction, group 2: System GT + System GT obturator ), group 3: Mtwo + cold lateral compaction , group 4: Mtwo + System GT obturator Horizontal sections were obtained every 1 mm up to 4 mm from the apex, using a low speed saw (Isomet 4000, Buehler, USA). Digital color images of sections were obtained at 35x under a stereomicroscope( Leica Microsystems GmbH Germany)and transferred to an IBM compatible PC. Calculation of the cross-sectional canal area (in per cent) filled by material or sealer was performed by use of image processor software (analySIS LifeScience Series).The data were analyzed using Kruskal Wallis and Mann-Whitney U-Tests.
Results:
There was significant diffeence in apical 3mm and 4mm groups (P<0.05)
Conclusion:
With the combined use of System GT+System GT obturator and Mtwo+System GT obturator significantly less area of sealer occured than that achieved with both NiTi preparation systems followed by cold lateral compaction.