According to WHO, at any one time, around 50 per cent of medical equipment in lowand middle-income countries cannot be used because of lack of maintenance or spare parts.1 We have found that unwillingness or inability to repair equipment and put it back in use is also a major cause. New equipment is made available by different international non-government organisations (INGOs) competing with on...

Ultrasonic array technique for assessing the integrity of the circumferential electron beam weld between the lid and walls of copper canisters is presented in the paper. The results of laboratory verification of the performance of the ultrasonic array system on real canister samples are presented. A method for suppression of grain noise scattered from the internal copper structure based on digi...

PURPOSE The use of appropriate instruments to clean surfaces with minimal change, is critical for the successful maintenance of a dental implant. However, there is no consensus about the type and methodology for such instruments. The aim of this study was to characterize changes in the roughness of titanium surfaces treated by various scaling instruments. METHODS Thirty-seven identical disks ...

Abstract Current studies have shown that the application of composite energy fields in plastic forming process can help reduce load and promote material flow. In this paper, a new method ultrasonic-assisted spinning integral for thin-walled cylindrical parts with outer ribs was proposed, which could not only improve manufacturing efficiency ribbed parts, but also further height ribs. A simulati...

Abstract The implementation of automated testing systems based on six degrees freedom (DOF) robotic manipulators is the actual trend in ultrasonic equipment development. Such are able to provide fast evaluation with respect surface object. In this work, post-processing algorithm Synthetic Aperture Focusing Technique (SAFT) suggested. allows presenting results form high-resolution imagery intern...

UNLABELLED Root canal treatment is a frequently performed dental procedure and is carried out on teeth in which irreversible pulpitis has led to necrosis of the dental pulp. Removal of the necrotic tissue remnants and cleaning and shaping of the root canal are important phases of root canal treatment. Treatment options include the use of hand and rotary instruments and methods using ultrasonic ...

Tests were conducted to determine thickness of smooth, nonreinforced geomembranes using three methods: mechanical (according to ASTM and European standards), ultrasonic, and magnetic methods. The mechanical method is the standard procedure used for determining thickness of geomembranes. The ultrasonic and magnetic methods are not commonly used for geomembranes; however, they are used for testin...

Cross-infection risk induced by dental-related droplets and aerosol particles has challenged service providers patients alike. The dental clinic been widely treated as one of the most vulnerable healthcare organizations with a high exposure to infection. present study aims investigate effect high-volume evacuation (HVE) on emitted during atomization procedures. Ultrasonic scaling, type procedur...