OBJECTIVE Bioactive glass air abrasion is a conservative technique to remove initial decalcified tissue and caries. This study examined the shear bond strength of composite resin to sound and decalcified enamel air-abraded by bioactive glass (BAG) or alumina using etch-and-rinse and self-etch adhesives. MATERIALS AND METHODS Forty-eight permanent molars were root-amputated and sectioned mesio...

OBJECTIVES The aim of this study was to investigate the effects of erosion and toothbrush abrasion on different restorative materials and human enamel. METHODS Human enamel and 5 kinds of tooth-colored restorative materials were used. The restorative materials included three composite resins (Filtek Silorane, Tetric EvoCeram, and Tetric EvoFlow), a polyacid-modified composite (Dyract Extra), ...

one arm. The dry proteins are dissolved in weak caustic soda and a drop placed on the abrasion. The test is complete in half an hour. An urticarial wheal with an erythematous blush around constitutes a positive reaction. Out of nearly 800 cases suffering from asthma or hay fever 200 positive reactions were obtained. Of these 28 reacted positively to some animal emanation. The largest number of ...

Inner Mongolia is located in the north of China, where the development of wind power industry is outstanding. Because of the surrounding environment’s destruction by frequent sandstorm phenomena in recent years, wind fan blades are severely damaged. The purpose of this paper is to use PLC and touch screen to realize quantitative content of sediment erosion wear in accurate control. The whole te...

A 54-year-old man with severe left upper extremity pain presented to the emergency department 1 day after a minor abrasion to the forearm. Physical examination of the extremity revealed warmth, erythema, exquisite tenderness, blue/violet skin discoloration, and tense bullae containing serous fluid. Systemically, the patient was hypotensive, tachycardic, febrile, and had a white blood cell count...

Analytical investigations of the test tools reveal in the most heavily stressed parts of the bolt signifi cantly different wear patterns for the tested variants also in microsections (Fig. 2). Data for a wear analysis evaluation regarding adhesion (positive values) and abrasion (negative values) have been obtained by using a 3-D coordinate measuring machine to compare the contour after stress t...

Abrasion of dental crown and the shape of denture occlusal surface are significant indicators in age determination of domestic mammals. The factors that significantly influence age determination of Eneolithic deer game in conditions of an open wildlife habitat are climatic changes that influenced their survival, as well as specific features of teeth morphological structure. In this paper the ag...

A hydrophobic co-polymer, heptafluorobutylmethacrylate co-para vinyl phenol, was compounded with ethylene glycol dimethacrylate and silanated quartz to produce a hydrophobic composite. The experimental composite had satisfactory working properties and had mechanical properties comparable to commercial composite but a higher modulus of resilience. The wear resistance was equal to or greater than...

Second-order optical model solutions to the elastic scattering amplitude were used to evaluate total, absorption, and abrasion cross sections for neutron-nucleus scattering. Improved agreement with experimental data for total and absorption cross sections is found when compared with rst-order (coherent approximation) solutions, especially below several hundred MeV. At higher energies, the rstan...