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  • Author: Marija Stošić x
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Basic Principles of Simulations: In situ and Online Simulation


Medical simulation is an artificial and a faithful representation of real clinical situations with the help of static and interactive doll simulators, standardized patients/actors, models for the exercise, simulation on a computer screen and a “serious” performance of a real clinical situation. That is a modern way of learning that helps students and health workers to achieve a higher level of expertise and provide a safer health care. Medical simulation is one of the greatest and most important innovations in medical education for the past 20 years. The goal of the simulation is to provide an optimal relationship between education and patient’s safety. It is used both in undergraduate and postgraduate studies, as well as in continuing medical education. Simulators used in medical education can be divided into six groups, ranging from the use of paper and pencils to the most modern computerized interactive simulator. Depending on the economic development level and the organization of health care, rigorous high medical simulation can be performed in three ways: in the center for medical simulation, in the form of “in situ” simulation, and as remote simulations.

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Effects of Lean Tools in Achieving Lean Warehousing


The acceptance of lean philosophy in the company means not only respecting the lean principles in the manufacturing but in all the processes that are performed inside the company. All processes in the company that are a potential places for making losses and waste and thus require the application of lean principles. Among others, warehouse and warehouse operations, as a centre of costs and waste, must be supported through the implementation of lean philosophy in the company by respecting lean principles. The implementation of lean principles in the warehouse is a certain step of improvement warehouse process and performance, but also of the whole company. In that sense, the paper presents the analysis of the warehousing process and its performances before and after implementation of the lean tools in a selected Serbian company as a practical example. In addition, research shows which parts of warehousing need to be improved, in analysed company, as well as correlation between the individual parts of warehousing, according to employees' opinion from next sectors: purchasing, production and logistics.

Open access
The Effect of Polymerization Technique on Marginal Index of Composite Fillings in Dentin


Polymerization contraction of composite resins has been one of the most extensively studied phenomena in dentistry in recent years. Initial polymerization by low intensity light followed by polymerization high intensity light improves marginal adaptation of composite in tooth cavities. A number of studies have verified that less marginal leakage and lower marginal index (MI) exist in relation to standard polymerization (continuous high intensity light).

The aim of the study was to quantittively evaluate the bond of composite materials to dentin and determine the MI values in dentin after the application of two techniques of light polymerization in two composite systems.

Twenty V class cavities were restored on extracted teeth for scanning electron microscopic (SEM) analysis of composite to dentin junction. Adhesion to dentin was achieved using Adper Single Bond 2-ASB/3MESPE, that is, Adper Easy One-AEO/3MESPE. Light polymerization of composite materials Filtek Ultimate-FU/3MESPE was performed using standard halogen light (HIP) or soft start program (SOF).

Marginal index of dentin was determined by measuring the length and width of marginal gap at the junction of composite filling to dentin, using scanning mirographies and Autodesk AutoCAD program.

Two-way ANOVA test was used for statistical processing of the obtained results. Differences in MI index between different light polymerization techniques (HIP- 8,18 and SOF-7,12) were not statistically significant (p>0,05), while the differences between composite systems (ASB/FU- 3,67 i AEO/FU- 7,69) were statistically significant (p <0.05).

The polymerization technique showed no significant effect on the composite to dentin junction. Lower MI dentin was established in composite system with the application of adhesive etch and rinse procedure in both polymerization techniques.

Open access