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 ...

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 ...

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 ...

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 ...

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), ...

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 ...