introduction: preserving the apical root structure during cleaning and shaping of the canal has always been a challenge in endodontics particularly when the root canals are curved. the purpose of this in vitro study was to compare the apical transportation induced by the reciproc and biorace rotary systems in preparing the mesiobuccal root canal of the human maxillary molars. materials and meth...

BACKGROUND All endodontic instrumentation systems tested so far, promote apical extrusion of debris, which is one of the main causes of postoperative pain, flare ups, and delayed healing. OBJECTIVES Of this meta-analysis was to collect and analyze in vitro studies quantifying apically extruded debris while using Hand ProTaper (manual), ProTaper Universal (rotary), Wave One (reciprocating), an...

Initiative: The Tygerberg Children's Hospital and Rotary Telemedicine Project in South Africa links specialists from Tygerberg Hospital to doctors at regional community or "district" hospitals to improve healthcare in rural areas. The initiative has assembled its own telemedicine system using off-the-shelf computer equipment and software that is more affordable than commercial telemedicine syst...

introduction: to compare the cleaning effectiveness of k3 and race niti rotary systems with k-flexo file instruments during the preparation of curved canals in extracted human teeth. materials and methods: a total of 50 root canals of mandibular and maxillary molars with curvatures ranging between 25º and 35 º were divided in three groups of 15 each and 5 as negative control groups. canals were...

Reversible computing is a concept reflecting physical reversibility. Until now several reversible systems have been investigated. In a series of papers Kenichi Morita defines the rotary element RE, that is a reversible logic element. By reversibility, he understands [2] that ’every computation process can be traced backward uniquely from the end to the start. In other words, they are backward d...

INTRODUCTION The purpose of this study was to evaluate the incidence of dentinal defects after root canal preparation with reciprocating instruments (Reciproc and WaveOne) and rotary instruments. METHODS One hundred human central mandibular incisors were randomly assigned to 5 groups (n = 20 teeth per group). The root canals were instrumented by using the reciprocating single-file systems Rec...

In the paper a switched reluctance rotary-linear motor is proposed. It is mechanically robust, simple to construct and easy to operate also in hostile working environment. The stator has a modular design compound of three correctly shifted usual 16 poles SRM stators. The rotor is constructed of several common 12 poles SRM rotor stacks. The motor is able to ensure both rotating and linear moveme...

Contributors: 1Reader, Department of Conservative Dentistry and Endodontics, SDS, Karad, Maharashtra, India; 2Professor and Head, Department of Conservative Dentistry and Endodontics, SDS, Karad, Maharashtra, India; 3Post-graduate Student, Department of Conservative Dentistry and Endodontics, SDS, Karad, Maharashtra, India Correspondence: Dr. Jain D. Department of Conservative Dentistry and End...