Improve the surface hardness of the blend PMMA / n- MgTiO3 to resist caries and bacteria

Abstract

In this study, the MgTiO3 ceramic system was used in a dry mixing method with 2: 1 mol and was reinforced to white acrylic powder used in dental applications to form a mixture of 1%, 2%, 3%, 4% and 5% of ceramic powder. The ultrasound technique was used to disperse the powder and distribute it homogeneously in the chloroform solution for one hour and then mixed it with acrylic powder in the same technique for half an hour. The tests were done for the samples made using industrial saliva with bacteria. Calculate the rate of wear using Pin on disc method. The results were interpreted based on the resulting images from the scanning electron microscope and the density of the prepared samples.

Information Technologies as a Means of Assessing the Knowledge of Students of the Technical Profile

“…In the latter case, a whole full-time lesson is allocated for their implementation. Taking into account the different abilities of students to memorize, about half of the questions included in the final assignment are devoted to the reproduction and formulation of definitions, rules, laws, the second half should contain tasks in which students could show their ability to use theoretical knowledge in practical activities or to illustrate the practical application of theory [11][12][13]. These tasks should be divided into 3 links: 1) tasks according to the algorithm; 2) tasks that differ in some elements of novelty (for example, the condition of the problem is non-standard, but the algorithm of action remains the same); 3) tasks requiring a search for a way to obtain the desired result [8].…”