Effects of ultrasonic refinement on endodontic access cavity walls: A microcomputed tomography analysis.

Objectives: The present study aimed in assessing the coronal defects after access cavity finishing and refinement by micro.

Methods: Access cavities on thirty molars were prepared using a diamond bur. To finish and refine the access cavity, the Endo-Z was used in group 1 (n=15) and Start X 1 in group 2.

The quality of Thermafil obturations with different final apical tapers: a three-dimensional microcomputed tomographic comparative study.

Aim: The aim of this study is to evaluate the influence of final canal taper on the sealing ability of Thermafil by using microcomputed tomography (micro-CT).

Materials And Methods: Fifty-four single-rooted teeth were instrumented to apical size 40 taper 4, 6 and 8%. Teeth were divided into three groups.