The major problems encountered in a reciprocating compressor are because of the valve failure .The other problem of leakage past the piston because of the worn out piston rings has also been placed in the reciprocating compressor. Pressure pulsations generated inside the piping of a reciprocating compressor may be taken as one of the tool for diagnosing the nature of fault inside the compressor...

Aim: The aim of this study was to evaluate the incidence post-operative pain after cleaning and shaping with three file system using Hand, Rotary Reciprocating motion in maxillary mandibular molars. Materials Method: A total 60 patients were randomly divided into 3 groups: group 1 (n=20) teeth prepared hand protaper till F2 size. In 2 primary wave one gold 3(n= 20) pre score noted visual analog...

An experimental rig has been built to test a horizontal scroll compressor and a reciprocating compressor of similar size and capacity. The compressors were tested with refrigerant.R404A operating at varying evaporator and condenser temperatures. The paper provides much needed information regarding the efficiency of the compressors operating under the same conditions with the same system paramet...

INTRODUCTION The introduction of nickel-titanium (NiTi) files into clinical practice has improved the quality of canal shaping, but increasing the curvature of the root canal (or the diameter of the master instrument that prepares the full working length) could result in more transportation, straightening, and aberration of the canal. Nickel-titanium instruments are significantly safer and have...

Introduction Endodontic instruments are developed to provide a better cleaning of the root canal system and reduce its risk of fracture. The aim of this study was to evaluate the instrumentation time and cyclic fatigue resistance of WaveOne Gold, ProDesign R and ProDesign Logic files. Methods and Materials Thirty Nickel-titanium (NiTi) rotary instruments were divided into 3 groups (n=10). Pro...

INTRODUCTION The aim of this study was to determine whether the debridement quality of the single-file F2 ProTaper instrumentation technique is comparable to a full conventional ProTaper sequence in both round and oval-shaped root canals. METHODS Fifty-four recently extracted vital lower incisors were instrumented with either a full range of ProTaper Universal instruments in rotary motion (gr...

The main factors affecting utilization of volumetric displacement of reciprocating compressors are analysed. A coherent system of parameters to quantify these is formulated. Reference is made to conventional parameters and to the work of other authors. Some new parameters are introduced and int~rrelationships are described. The overall_purpose of the theory is to apportion shortcomings in the v...

introduction: the aim of this study was to compare the changes that occur in the danger zone (dz) after preparation of curved mesiobuccal (mb) canals of mandibular first molars with waveone instruments in two different movements [reciprocation (rcp) and counter-clockwise rotation (ccwr)] by means of cone-beam computed tomography (cbct). methods and materials: mb canals of 30 mandibular molars w...