STATEMENT OF PROBLEM Crowns cemented on short implant abutments may have insufficient retention. PURPOSE The purpose of this study was to evaluate the effect of circumferential grooves on the retention of cemented cast copings on implant abutments. MATERIAL AND METHODS Sixty similarly-shaped implant abutments were divided into 4 groups (n=15): without grooves, with 1 groove, with 2 grooves,...

The aim of this study was to verify the applicability Ohmic Model with variable ionic resistivity voltammetric zinc oxide growth on galvanized steel sheets, without chromate passivating film. Two kind sheets were studied: one produced from a bath molten containing antimony and other lead. Sb presented better performance against corrosion in comparison those Pb. electrochemical experiments perfo...

A pipe rack assembly uses hot-dip galvanized trusses joined together by screw connections. The welded were manufactured with ASTM A572 gr.50 W steel profiles. Two of them fractured during the galvanizing bath. fractures presented typical characteristics LMAC — liquid metal-assisted cracking mechanism. In both cases, fracture was located in structural element base metal and followed fillet weld ...

Photovoltaic solar thin films zinc telluride studies on chemically deposited have been carried out to assess its suitability for use in the conversion of energy electrical energy. The configuration fabricated cell is n-ZnTe| NaOH (0.1M) + S Na2S (0.1M)|C(graphite). study shows that ZnTe are n-type conductivity. junction ideality factor was found be 2.87. flat band potential -0.652 V. barrier he...