In recent decades, there has been significant growth in research focused on biocompatible materials, particularly in the field of materials science and engineering. The primary advantages of these materials are their biocompatibility, bioactivity, and antibacterial properties. Consequently, there has been a growing utilization of bioceramic sealers in the field of endodontics. This study investigated the amounts of bioactive elements in dentin in contact with the AH Plus^® Bioceramic Sealer (Dentsply, Konstanz, Germany). The results were qualitatively evaluated by examining scanning electron microscopy (SEM) images and elemental mapping and quantitatively by determining element weight (wt%) and atomic (at%) percentages obtained from EDX analysis. The AH Plus^® Bioceramic Sealer demonstrated notable bioactivity through its dynamic contact with dentin at the root level.

The aim of this case study is to implement the Lean Six Sigma methodology to reduce the scrap rate of the edge-bending process of a metal door case used in the assembly process of refrigeration appliances. This study was initiated because the assembly process of refrigerators does not work at maximum capacity due to the scrap that occurs for this component. Losses have direct effects on a company’s profits and on its competitiveness on the market. This research provides an overview of the identification of the most optimal and useful tools that can be used in each context; this will help to establish a protocol which can be applied in similar contexts. Although this study is limited to one process, the results will have direct effects on the assembly line of the organization. The purpose of this study is to increase the capability of the process and to improve the efficiency of the delivery of the component parts to the assembly line. This case study provides further evidence of the effectiveness of the use of the Six Sigma methodology in identifying and reducing scrap rates.

An important step toward automation and digitization in Industry 4.0 is the automobile sector’s use of smart manufacturing integrated systems (SMISs). Although this change increases productivity and competitiveness, it also creates new hazards for workplace safety. Key issues include ergonomic and cognitive strain from greater human–machine interactions, particularly with collaborative robots (cobots), and cybersecurity threats from the IIoT and cyber–physical systems. This paper looks at these hazards and stresses the value of safety precautions like predictive maintenance, traceability, and real-time monitoring. This case study investigates how the integration of smart manufacturing integrated systems (SMISs) and cyber–physical systems (CPSs) within Industry 4.0 frameworks enhances workplace safety in the automotive sector. Through a comprehensive case study of the final assembly line, this research explores how these technologies contribute to predictive maintenance, real-time monitoring, and human–machine collaboration, leading to significant reductions in ergonomic and cybersecurity risks.

Considering thermal environment aspects have a major impact not only on occupational health and safety (OH&S) performance but also on the productivity and satisfaction of the workers, the aim of the case study was to assess the thermal comfort of a group of 33 workers in an automotive industry company, starting with collecting data about the thermal environment from different workplaces, continuing with the analytical determination and interpretation of thermal comfort using the calculation of the Predicted Mean Vote (PMV) and Predicted Percentage of Dissatisfied (PPD) indices, according to provisions of the standard ISO 7730:2005, and comparing the results with the subjective perception of the workers revealed by applying individual questionnaires. The results of the study represent an important input element for establishing the preventive and protective measures for the analysed workplaces in correlation with the measures addressing other specific risks and, also, could serve as a model for extending and applying to other similar workplaces in future studies. Moreover, the mathematical model and the software instrument used for this study case could be used in further similar studies on larger groups of workers and in any industrial domain.

This study aimed to develop a state-of-the-art method for assessing chemical risks in small and medium-sized enterprises (SMEs). The method combined desk research findings and the authors’ practical knowledge to identify major shortcomings in performing risk assessments at the workplace. Data were collected from nine SMEs across three sectors: agriculture, laboratory research, and conservation and restoration laboratories. On-site observations, focus group discussions, and textual content analysis of occupational safety and health documentation were used to gather information on chemical risks and workers’ perceptions. The developed method uses numerical factors to account for the level of conformity with regulations and the duration of exposure to support an estimation of the probability of an incident. The method was designed to enhance risk assessment practices and tackle common issues encountered by SMEs, including the lack of data for estimating probability. Feedback from SMEs involved in the study indicated that the method’s performance was satisfactory, with its well-organized information flow and supportive components being particularly valued. The study highlights the importance of effective risk assessment in creating a safer and healthier work environment for workers.

One of the goals of modern society is represented by reducing the cost for the maintenance of cars. One of the pieces that break down most often on the engine block is the crankshaft, in various areas of it. Due to the fact that the price of a crankshaft is very high, specialists seek solutions for repairing and not replacing them. In this study, it is presented a comparison in terms of hardness obtained at recovering the counterweight by welding by using two methods of welding, WIG and SMAW through various techniques: normal, WTO, lateral depositing.