Cleaning Ability of Gentlefile Rotary System Compared with Three Alternative Brands.

Introduction: In this study, the cleaning ability of a stainless-steel rotary instrument called Gentlefile, was compared with three nickel-titanium rotary instruments.

Materials And Methods: In this study, forty mandibular single-rooted premolars were randomly assorted into four groups: Gentlefile, ProTper Universal, RaCe files, and XP-Endo Finisher/ProTaper Universal system (=10). Final instrumentation was done using the aforementioned files with 5.

Assessment of the relationships between posterior root apices and the maxillary sinus floor: a comparison of panoramic radiography and cone beam computed tomography.

The aim of this study was to evaluate the relationships between the apices of posterior teeth and the maxillary sinus floor, comparing the results of assessments performed with panoramic radiography and cone beam computed tomography (CBCT). This retrospective cross-sectional study consisted of 96 participants with a total of 302 maxillary posterior teeth. On both panoramic radiographs and corresponding CBCT images, 735 roots were classified into 3 categories according to their topographic relationship with the maxillary sinus: class 1, clear, distinct distance between the root tips and the floor of the sinus; class 2, roots adjacent to the floor of the maxillary sinus; or class 3, roots protruding into the maxillary sinus cavity.