Aim: To evaluate the cyclic fatigue resistance of Pro Taper NEXT & Reciproc R rotary files in simulated canals with angle curvaturesat 45o and 60 o.Materials Methods; This study was conducted at HKE' s S.Nijalingappa institute dental sciences reasearch institute,Kalaburagi. After considering inclusion exclusion criteria selected samples were divided into two groups, as G1(ProTaperNEXT) G2(R...

It is known that papaverine and isoprenaline stop the spontaneous spike discharge, usually with some hyperpolarization (1-6). The action of fl-adrenergic stimulants is thought to be related to the ability of these drugs to increase the intracellular level of cyclic 3', 5'-adenosine monophosphate (cyclic 3', 5'-AMP) in the smooth muscles. In the iso lated smooth muscle, catecholamine-induced rel...

Due to the topological effect, cyclic polymers demonstrate different and unique physical and biological properties in comparison with linear counterparts having the same molecular-weight range. With advanced synthetic and analytic technologies, cyclic polymers with different topologies, e.g. multicyclic polymers, have been reported and well characterized. For example, various cyclic DNA and rel...

INTRODUCTION Recent improvements in alloys, kinematics, and concepts have been combined to increase the cyclic fatigue resistance of nickel-titanium (NiTi) instruments. The aim of this study was to compare the cyclic fatigue resistance of new M-Wire reciprocating WaveOne (Dentsply Maillefer, Ballaigues, Switzerland) and Reciproc (VDW GmbH, Munich, Germany) files at 2 levels. METHODS Sixty Rec...

The genetic changes taking place during adaptive evolution are particularly interesting in evolutionary biology. As a consequence of adaptive evolution, natural populations of an organism under selective conditions change genetically and phenotypically after a number of generations in order to survive in that particular environment. When a DNA-damaging and mutagenic agent like UV light is exper...

Coronal preflaring NiTi files should possess proper hardness, resistance to fracture and flexibility. This study compared the bending cyclic fatigue of three orifice files. HyFlex EDM Orifice opener (#25/12), CM (#25/08) One Flare (#25/09) were tested (n = 46/instrument). Bending was assessed with stress when perpendicular displacement applied a 3 mm point from file tip, performed at either roo...

Objective: Aim of the present study is to evaluate mechanical properties a newly developed rotary file, AF Rotary (Fanta Dental, Shanghai, China), and compare these features with worldwide spread Protaper Gold F2 (PTG F2; Dentsply Maillefer, Ballaigues, Switzerland). Material Methods: 60 25.06 PTG were divided in three groups 20 files each. A group underwent cyclic fatigue resistance tests, sec...

Gene-for-gene disease resistance typically includes a programmed cell death response known as the hypersensitive response (HR). The Arabidopsis thaliana dnd1 mutant was previously isolated as a line that failed to produce the HR in response to avirulent Pseudomonas syringae pathogens; plants homozygous for the recessive dnd1-1 mutation still carry out effective gene-for-gene resistance. The dnd...