Introduction: The restoration material commonly used as core material for pulpless posterior teeth is mostly amalgam due to its high strength and low cost and it can be used with or without pin. The aim of this study was to evaluate the influence of post material on stress distribution in mandibular second premolar tooth by finite element analysis. Method: The stress distribution was analyzed i...

Abstract The dry sliding behavior of three commercial friction materials (codenamed FM1, FM2, and FM3) tested against a Co-free cermet coating produced by high-velocity oxy-fuel (HVOF) on gray cast-iron discs is investigated. FM1 conventional low-metallic material, FM2 developed for using HVOF-coated discs, FM3 Cu-free material with low content abrasives relatively high concentration steel fibe...

In-Sn-O nanostructures with rectangular cross-sectional rod-like, sword-like, and bowling pin-like morphologies were successfully synthesized through self-catalytic growth. Mixed metallic In and Sn powders were used as source materials, and no catalyst layer was pre-coated on the substrates. The distance between the substrate and the source materials affected the size of the Sn-rich alloy parti...

As of 1999, the only artificial systems employed by the U.S. military for the detection of buried landmines were metal detectors.1 Although these detectors can sense as little as 0.5 grams of metal, and thus maintain a high detection probability, they cannot distinguish between a firing pin or a piece of scrap metal. Furthermore, modern landmines can be constructed without metallic parts and wo...

bones) and less helpful in retrieving thin metallic materials (paper clip or straight pin). The easy removal ofthe large pair of tweezers from the patient supports this observation. Avoidance of fragmentation oflarge organic objects (eg, peanuts, tablets), a potential hazard when biopsy or alligator forceps are used and which can make complete removal difficult, is also felt to be an advantage ...

Prostatic intra-epithelial neoplasia (PIN) is considered a precursor of invasive carcinoma, characterized by proliferation and anaplasia of cells lining prostatic ducts and acini. In this study, we applied the PIN grading system on one-hundred cases of prostatic carcinoma and one-hundred cases of benign prostatic hyperplasia, then compared the results. 74% of prostatic carcinoma and 51 % of...