Influence of the glide path on various parameters of root canal prepared with WaveOne reciprocating file using cone beam computed tomography.

Background: Nickel-titanium (NiTi) rotary instrumentation carries a risk of fracture, mainly as a result of flexural (fatigue fracture) and torsional (shear failure) stresses. This risk might be reduced by creating a glide path before NiTi rotary instrumentation. The aim of this study was to compare various root canal parameters with the new WaveOne single-file reciprocating system in mesial canals of mandibular molars with and without glide path using cone beam computed tomography (CBCT).

Surface geometry of various nanofiller composites using different polishing systems: A comparative study.

Aim: This in vitro study assessed the surface quality of three nanoparticle composites with four commercially available polishing systems.

Materials And Methods: A total of 180 specimens (10 × 2 mm) were prepared in metal molds using three nanocomposites, Filtek Z-350 XT, Ceram-X Mono, and Tetric N-Ceram. Sixty specimens of each material were then randomly assigned to five study groups.