Apically extruded debris in curved root canals using the waveone gold reciprocating system

Background : The purpose of this study was to evaluate apical debris extrusion in curved root canals using a specific file system.METHODS:50 human mandibular molars were extracted and chosen for the study, ranging between 20 and 40 degree and curvature radii <10mm were randomly assigned to 2 groups (n=20) according to the kinematics used for root canal preparation ( reciprocating motion with waveone gold reciprocating system) and the Manual Technique. The apically extruded debris were collected in eppendorf tubes. The tubes are stored in an incubator for 5 days. The time recorded for each instrumentation procedure was recorded.  Results: The Wave One Gold reciprocating system is associated with less extrusion of debris as compared to Manual technique. Conclusion : Under the conditions of the study both the Wave One Gold Reciprocating system and the Manual instrumentation technique caused apical debris extrusion to some degree. The WaveOne Gold reciprocating  system caused less extrusion of debris in curved root canals compared with manual instrumentation technique

Comparative evaluation of the fracture resistance of three different recent composite systems in large class II MOD cavities: An in vitro study

Background: For severely mutilated teeth, this research evaluated the most contemporary restorative material. Aim: Repair of Class II MOD cavities in premolars with Ever X posterior in the recent past, Beautifil restorative, and the Universal TetricEevoCream composite systems will be evaluated and compared in this research. “Materials and Methods:” Sixty human maxillary premolars were chosen for the study. As a check, we utilised a group of fifteen healthy teeth (Group 1). The remaining 45 teeth were fitted with MOD cavities of standardised dimensions and randomly assigned to one of three groups (Groups 2, 3, and 4) (n = 15). They used Beautifil restoratives for teeth in Group 2, GC Ever X posterior for teeth in Group 3, Universal Tetric EvoCream for teeth in Group 4. Newtons were used to measure the strength of a material (N). Results: Group 4 exhibited the greatest mean fracture resistance of the four groups, followed by Groups 3, 1, and 2 and finally Group 4. Conclusion: It was found that the Universal Tetric EvoCream composite had the greatest fracture resistance among the test groups. There was a substantial statistical difference between all of the groups. &nbsp