Purpose:The objective of this investigation is to study prosthodontics and internal components resistance to the masticatory stress and considering different force directions by using Finite Element Method analysis (FEM). The structural materials of the components are usually Titanium alloy grade 4 or 5 and thus, guarantee the integration of the fixture in the bone due to the osteointegration phenomena. Even if the long-term dental implant survival rate is easy to be obtained and confirmed by numerous researches, the related clinical success, due to the alteration of the mechanical and prosthodontics components is still controversial.Methods:By applying engineering systems of investigations like FEM and Von Mises analyses, it has been investigated how dental implant material was held against the masticatory strength during the dynamic masticatory cycles. A three-dimensional system involved fixture, abutment and the connection screws, which were created and analyzed. The elastic features of the materials used in the study were taken from recent literature data.Results:Data revealed a different response for both types of devices, although implant neck and dental abutment showed better results for all conditions of loading while the abutment screw represented aweak point of the system.Conclusion:The data of this virtual model showed all the features of different prosthetic retention systems under the masticatory load. Clinicians should find better prosthetic balance in order to better distribute the stress over the component and to guarantee patients’ clinical long-term results.

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An experimental investigation on partially PBO (short of Polyparaphenylenebenzobisthiazole) FRCM (Fiber Reinforced Cementitious Mortar) confined clay brick masonry columns has been conducted. Ten small-scale specimens measuring 445 mm high with a square cross-section of the 250 mm side have been tested under monotonic axial loading until collapse. Two columns were unconfined, while the remaining ones were confined with single-layer PBO FRCM jackets varying the geometric configuration along their height. The vertical spacing ratio sf’/sf, being sf’ and sf the center-to-center and the net spacings between two consecutive jackets, respectively, was considered as the key parameter of the confinement configuration. The failure modes, stress–strain curves and peak axial stress and strain values are reported. The experimental results have been compared to the predictions of models found in the Italian guidelines CNR DT 215/2018 and the American ACI 549-R20 standards. The main aspects analyzed involved (i) the evaluation of the effectiveness of partial confinement on the mechanical response of columns, (ii) the definition of the mechanical and geometrical parameters that influence the structural response of partially confined columns, and (iii) the development of appropriate analytical models for the prediction of the resisting capacity of masonry columns partially confined with PBO FRCM.

We examined how home-based teleworkers perceived managerial control in an Italian context in order to gain insight into some of the organizational changes brought on by the COVID-19 pandemic. Drawing on studies of changes to managerial control over the past few decades, we show how workers have experienced the reconfiguration and hybridization of control practices and methods in home telework. Our results cast doubt on the widely held belief that telework is revolutionizing managerial control and work procedures. Organizational and power dynamics at work are key to determining how telework affects employee experiences. Summary We investigated the impact of the COVID-19 pandemic on labour relations, specifically by examining how teleworkers perceived control within various occupations in an Italian context. Telework has long been touted as having the power to displace traditional managerial control structures in favour of less hierarchical forms of supervision. However, scholars are still divided over whether it promotes greater employee autonomy or, on the contrary, results in greater managerial control. Research has frequently been influenced by specific circumstances. In earlier decades, the low prevalence of telework encouraged neither thorough research nor the ability to compare various organizational structures. Additionally, there has been a long-standing tendency to treat teleworkers as a homogeneous group, with little regard for within-group differences. Disparities among workers and among organizations can lead to inconsistent results. Our study was conducted mainly during the first waves of the pandemic in Italy, with a view to understanding if, how, to what extent and on what basis telework modifies managerial control processes and systems. We looked at how workers experienced managerial control in various occupations that differ in organizational form and managerial culture. In line with Storey’s (1985) concept of “layers of control” and, more generally, with studies on transformations of managerial control in labour processes, we argue that the emergency restructuring due to home telework caused a transfer of organizational conditions, these being a combination of existing methods, standards and forms of control. Our findings show how employees dealt with the hybridization, overlapping and differentiation of various forms of control during a time of widespread telework. In this way, we cast doubt on the simplistic association between telework and reduction of control, as well as on the potential of telework to bring fundamental change to organizational processes.