The most demanding working conditions were observed in canals with sharp curves, especially in areas where the instruments had larger diameters. To prevent possible damage to instruments and fracture, it is advised that the instruments should be discarded following their use in such canals.

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Ni-Ti rotary endodontic instruments (files) are used in dentistry during the endodontic treatment to shape the root canal of the tooth while removing the pulp when infected. Up to now, the studies for evaluating their performances and drawbacks were mainly limited to experimental tests on product flexural and torsional resistance. This work exploits computational analyses for investigating the effects of materials with different mechanical properties on the behavior of rotary endodontic instruments. The aim is to understand the appropriate material choice to reduce the criticality of the treatment in particular clinical conditions. In particular, the interaction between an accurately modeled rotating file and differently shaped root canals during the clinical procedure was studied performing finite element analyses. Strains induced by the treatment on a file made of a ''standard'' Ni-Ti alloy (characterized by average properties of the pseudoelastic behavior), a ''long'' Ni-Ti alloy (characterized by wide transformation region), a ''super'' Ni-Ti alloy (characterized by an extended Hookian behavior without transformation region), and stainless steel were compared. The results accurately show the advantages of the use of Ni-Ti alloy with respect to stainless steel and the better performance of the ''long'' alloy in all the tested case.

Since the international governmental institutions required and/or recommended (according to the regulations of each country and continent) all public works to be certified in the BIM (Building Information Modeling) methodology, public and private institutions and universities have sought to integrate BIM into their production and educational processes. This requires the university academic environment to focus its efforts on training students in this methodology, as they will need to apply it in any future work activities related to architecture and construction. This article seeks to analyze which methods are being used by higher education institutions around the world to integrate BIM implementation in AEC (architecture, engineering, and construction) degrees and to determine if a set of regulatory guidelines exists that could serve as a common foundation for institutions to improve this integration process. To this end, a systematic literature review was carried out on WOS and SCOPUS by applying the PRISMA statement methodology. Inclusion and exclusion criteria were selected based on keywords, abstracts, and full content of the articles. In the end, 23 articles were thoroughly studied, the integration and evaluation methods analyzed, and results obtained. The analysis shows a consensus on the need to develop common academic guidelines across university centers that define a strategy for curriculum modifications and teaching and learning strategies. Finally, future lines of research are identified.

The expectations, attitudes, engagement, and motivation of students are key elements when designing learning activities. Several studies have been implemented and different strategies and activities have been analyzed to improve the aforesaid aspects of learning content. In the context of the New Learning Context (NLC), this paper presents the findings of two first day of class activities aimed at engaging engineering students in a business and management subject from the very first moment: an empirical study conducted by means of a survey answered by engineering students in Information and Communication Technologies (ICT), followed by an interactive activity between students and instructors carried out through a reciprocal interview activity. The survey was performed with the objective of identifying what they ‘liked’ and ‘disliked’ on their first day of class of a business subject. The findings are presented and compared with previous studies and have proven to be mostly consistent with previous academic work. Finally, a reciprocal interview activity was chosen to potentially enhance the students’ engagement and motivation. According to the feedback received, this activity was positively valued by the students.

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