Indications and particularities of the clinical - technological steps of manufacture of temporary fixed prosthetic constructions

Ilarion Postolachi Department of Prosthodontics, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Republic of Moldova, The 8th International Medical Congress for Students and Young Doctors, September 24-26, 2020Introduction. Crown lesions as well as reduced partial dentation are the most common dental conditions, which require prosthetic treatment. Fixed treatment of crown dental lesions and partial dentation is permanently accompanied by grinding of hard teeth structures and without their manufacture is often impossible (I.Postolachi; V.Guțuțui 1990). Aim of the study. The study of the particularities of the clinical picture of the crown dental lesions and of the reduced partial dentation by determining the effectiveness of the contemporary technologies for making the temporary fixed constructions. Materials and methods.. 25 patients was treated with prosthetic indications, age 22-47 years with coronal and edentulous dental injuries reduced to one or both jaws. The examination of the patients was performed clinico-instrumental, photometric, radiological; the diagnostic models in the articulator were studied. The Luxatemp Star Bisacrylic material was used to make the provisional crowns and bridges, made by the direct method. This is a high performance material by increasing the resistance to tearing and bending, and the grip time is reduced. The co-worker of these material provisional restaurants are aesthetic, durable and stable. Parallel high quality PMMA Bilkim material was also used, which allows the milling method to make fixed constructions of both single crowns and long-lasting dental bridges. Results. The study argues that the construction of provisional constructions in case of coronal dental lesions and reduced partial dentation contributes to: protection of the dental pulp and gingival tissues from harmful factors (physical, chemical and microbial). It allows the prosthetic doctor to specify the diagnosis and to perfect the treatment plan and its motivation to the patient as well as to transmit some information to the dental technician. We mention that both the crowns and the provisional dental bridges allow the healing of the post-extraction and peri-implantation remaining tissues, establish the occlusal relationships and the vertical dimension of occlusion, prevent the dental migrations and last but not least, by fixing them with the provisional cement they stimulate the repair processes in the tissue. Conclusions. The provisional prosthesis in fixed prosthetics has a privileged place. It is true that it raises costs, but in developed countries, it is no longer possible to design fixed prosthetics without provisional prosthetics

Social Work in Romanian Rural Communities: An Inside Perspective from a Qualitative Study

The social work profession was revived in Romania in 1994, when the first generation of university graduates went to the field. However, only in 2011, when the Law no. 292 of Social Work was issued, the framework for the activity of social workers in the rural communities was settled. Although the legislation provided a proper context for the unfolding of a meaningful social work in rural settings, the labor market was far from being able to absorb the great number of needed professionals. On the one hand, the paper intends to present the barriers that marked the beginning of social work in the Romanian rural space. On the other hand, the paper briefly describes the particularities and the opportunities for social work in the rural areas. Also, through the voice of professionals, the main social problems in the countryside are exposed and some possible interventions aiming at the improvement of the life conditions among the villagers are proposed. The study is based on 43 qualitative interviews carried out in 2016-2020 with professionals employed as social services workers by commune or village local councils. The collected data were explored and interpreted using thematic analysis. One conclusion is that the field is dynamic and in need of substantial improvement.</p

Analysis of a Dynamical Cournot Duopoly Game with Distributed Time Delay

The aim of the paper is to analyze the dynamic model of the Cournot duopoly game with bounded rationality associated to two firms. We consider the cost function of the first firm as nonlinear and for the second firm as linear. The players do not have a complete knowledge of the market and they follow a bounded rationality adjustment process based on the estimation of the marginal profit. Also, the distributed time delay is introduced, because the decisions at the current time depend on the average past decisions. The mathematical model is described by a distributed delay differential system with two nonlinear equations. The study for the local stability of the Nash equilibrium point is carried out in the case of two types of kernels: weak (exponential) and Dirac. A change in local stability of the equilibrium point, from stable to unstable, implies a Hopf bifurcation. The delays are considered as bifurcation parameters. In some conditions of the parameters of the model, we have proved that a family of periodic solutions bifurcates from the equilibrium point when the bifurcation parameter passes through a critical value. Numerical simulations are performed to illustrate the effectiveness of our results. Finally, conclusions and future researches are provided

Regions of the World and the Covid-19 Health Emergency

Chapter 2 takes readers on a journey through world regions during the first six months of the pandemic, a period shaped by vastly different approaches between and within countries ranging from denial, mitigation to suppression. Some countries had to deal with major weather events and other disasters while also managing the health emergency. The ideologies of governments came to the fore influencing whether health or economies were prioritised, the science was accepted, and whether approaches were informed by individualism or collective responsibility. The first six months of the pandemic highlighted vast inequalities and established the global conditions for the emergence of new variants