Now showing items 1-10 of 1999
Irreducibility criteria for reciprocal polynomials and applications
(Mathematical Association of America, 2017-01)
We present criteria for determining irreducibility of reciprocal polynomials over the field of rational numbers. We also obtain some combinatorial results concerning the irreducibility of reciprocal polynomials. As a ...
Comparison of cyclic fatigue and torsional resistance in reciprocating single-file systems and continuous rotary instrumentation systems
(Nihon Univ, School Dentistry, 2014-12-01)
As compared with continuous rotary systems, reciprocating motion is believed to increase the fatigue resistance of NiTi instruments. We compared the cyclic fatigue and torsional resistance of reciprocating single-file ...
Direct reciprocity in animals: The roles of bonding and affective processes
The presence of direct reciprocity in animals is a debated topic, because, despite its evolutionary plausibility, it isbelieved to be uncommon. Some authors claim that stable reciprocal exchanges require sophisticated ...
Reciprocal frame structures, a first academic approach to sustainable structures
(International Association for Shell and Spatial Structures, 2016-09-26)
Endodontic retreatment: clinical comparison of reciprocating systems versus rotary system in disinfecting root canals
Introduction This clinical study was conducted to compare the effectiveness of single-file reciprocating systems and rotary systems in removing endotoxins and cultivable bacteria in endodontic retreatment.Methods Thirty ...
Cyclic and Torsional Fatigue Resistance of Reciprocating Single Files Manufactured by Different Nickel-titanium Alloys
(Elsevier B.V., 2017-07-01)
Introduction: The aim of this study was to evaluate the cyclic and torsional fatigue resistance of the following reciprocating single-file systems: ProDesign R 25.06 (Easy Equipamentos Odontologicos, Belo Horizonte, Brazil), ...
Counterclockwise or clockwise reciprocating motion for oval root canal preparation: a micro-CT analysis
AimTo evaluate oval root canal preparation using one or two instruments in counterclockwise or clockwise reciprocating motion. MethodologyThe radiographic diameter of mandibular human incisors was evaluated, and oval canals ...