INTRODUCTION The aim of this study was to compare cyclic fatigue resistance of four nickel-titanium rotary systems and to evaluate their surface, fractographic, and matrix morphology. METHODS Four models of endodontic rotary files (EasyShape [Komet/Gebr. Brasseler, Lemgo, Germany], ProTaper [Dentsply Maillefer, Ballaigues, Switzerland], NRT [MANI Inc, Toshigi-Ken, Japan], and AlphaKite [Komet...

BACKGROUND Navel piercings are becoming increasingly popular among adolescents. Body piercing jewelry must be removed before surgery, because electrical burns can occur with electrocauterization. Also, piercing jewelry creates artifacts during magnetic resonance imaging. Even temporary piercing jewelry removal may lead to closure of the subcutaneous tract; therefore, temporary replacement with ...

We report a precise match between the high temperature (D+2)-dimensional Tangherlini-AdS black hole and low quantum phonon gas in D-dimensional nonmetallic crystals residing (D+1)-dimensional flat spacetime. The is realized by use of recently proposed restricted phase space formalism for thermodynamics, result can be viewed as novel contribution to AdS/CMT correspondence on quantitative level.

Because of its superior properties, stainless steel has been widely used for many applications. Nonmetallic inclusions can influence the quality products. A set samples was to track response inclusion composition during processing a heat titanium-bearing 18% chromium steel, from deoxidation after decarburization, solidified slab. The oxide responded as expected additions deoxidizers and calcium...