INTRODUCTION The use of reciprocating movement was claimed to increase the resistance of nickel-titanium (NiTi) file to fatigue in comparison with continuous rotation. Recently 2 new brands of NiTi files 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 2 files, Reciproc and WaveOne. METHODS Cyclic...

The endodontic file is a tapered, needle shape body used for the preparation of curved human root canals. During preparation, process files get failed due to locking action offered by canal wall. present study aimed find fatigue life at 23°, 33° and 43° curvature angles. Four brands were selected viz. Hyplex CM, Pro-Taper Next, Hero Shaper, Pro-File Vortex. strain analysis done using ANSYS show...

introduction: the aim of this in vitro study was to evaluate the effects of establishing glide path on the centering ability and preparation time of two single-file reciprocating systems in mesial root canals of mandibular molars. methods and materials: sixty extracted mandibular molars with curvatures of 25-39 degrees and separate foramina for the mesiobuccal and mesiolingual canals, were divi...

We developed a novel discharge valve characters usmg the stopper to obtain the high efficiency reciprocating compressor for refrigerators. Generally, the sticky force occurred due to the shape of valve, stopper and oil between the valve and valve seat changed the process of valve motion and valve dynamics of compressor. In this paper, we can measure the characteristics of the sticky force and d...

background: nickel–titanium (niti) rotary instrumentation carries a risk of fracture, mainly as a result of fl exural (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-fi le reciprocating system in mesial ...