The use of reciprocating movement (RM) was claimed to increase the resistance of nickel-titanium (NiTi) file to fatigue in comparison to continuous rotation (CR). Recently two new brands of NiTi file have been marketed for use in a RM mode. The purpose of this study was to compare the cyclic fatigue resistance and torsional resistance of these two files; Reciproc and WaveOne. Cyclic fatigue tes...

MATERIALS AND METHOD Fig: 1 Extracted Mandibular molars selected for the study

The field of endodontics is devoted to the study and treatment of tissues inside (endo) the tooth (dontia). When a nerve within a tooth becomes necrotic andor infected, socalled root canal therapy might be considered. In this case, a dental practitioner cleans and widens the inner root canal system by chemical irrigation and mechanical instrumentation with respect to the original canal morpholo...

Aim- The aim of this in-vitro study was to compare the effect NaOCl, EDTA, Propolis and Distilled water on cyclic fatigue resistance Protaper Gold rotary NiTi instruments.
 Method- A total 40 commercially available (n =40) Ni-Ti files were used assess different root canal irrigants their resistance. divided into four groups (n=10 per group) as Group 1- (Control group), 2 – 5.25 % 3 -17% ED...

Aim: To determine the centering ability of Twisted FileTM rotary system compared with ProTaper UniversalTM and ProFileTM rotary systems by evaluating preand postoperative cross-sectional images of the apical root canals third. Methods: Thirty mesiobuccal canals of human mandibular first molars were divided into three groups with 10 root canals each according to the instrument used: group 1, Pro...

Nickel-titanium rotary instruments are important adjuncts in endodontic therapy. This review attempts to identify factors that influence shaping outcomes with these files, such as preoperative root-canal anatomy and instrument tip design. Other, less significant factors include operator experience, rotational speed, and specific instrument sequence. Implications of various working length defini...

Objective:
 To assess the life of two different rotary nickel-titanium (NiTi) instruments in curved canals with complete protocol, by using 360°rotation motion and reciprocating motion.
 Materials Methods:
 About one hundred seventy extracted maxillary mandibular molars were taken from which root selected randomly divided 2 groups, for analyzing number uses files. One prepared Hy...

OBJECTIVE To evaluate the effect of number of uses, angle and radius of curvature and type of instrument on the fracture of ProTaper rotary instruments when used by undergraduate students. STUDY DESIGN Three hundred and seventy-six molars, with a total of 1114 root canals, extracted were instrumented by undergraduate students using ProTaper instruments according to the manufacturer´s recommen...