Current Issue

In implantology, the resorption of bone ridges, especially at the posterior region, is a constraint for standard dimensions implant placement, unless reconstructive surgery is envisaged, such as elevation of the sinus floor or augmentation of ridges, although widely used, these techniques, sometimes uncertain, require an additional surgical procedure, and an expensive cost. Hence the interest of short implants, which can offer us an alternative solution.

Head and neck paragangliomas are tumors of a neuroendocrine nature originating from neural crest cells. These tumors are often difficult to diagnose and treat. We report a case of an 86 years old female presenting with a right tumefaction of the neck who had tumor localized at the carotid bifurcation. The serum catecholamine levels were normal. The tumor was unresecable. The radiological exploration concluded the diagnosis of a paraganglioma and confirmed the presence of visceral metastasis.

Synovial osteochondromatosis (SOC) is a mono-articular arthropathy rarely seen in diarthrodial joints. It occurs 3 times more in males than females and most often in those aged 30 to 50 years. It is a benign metaplastic proliferative disorder of the synovium characterised by the formation of multiple cartilagenous nodules in the synovium. With recent advances in arthroscopic techniques, the indications for arthroscopic treatment have been extended. We report a rare neglected case covering a 12-year period of a locally giant SOC of the elbow in a 30-year-old man.

The study of historical and demographic processes in all areas of Uzbekistan today is one of the most important problems. The article assesses the demographic situation in the Syrdarya and Jizzakh regions in Soviet times, in particular, based on digital data, factors that influenced migration and population growth are shown.

This paper discussed how libraries are positioning themselves as change agents to transforming education through various professional development programmes that will equip the teeming populace with basic skills, new knowledge and right information that will continue to boost Nigerian educational landscape. It paper however revealed some bottlenecks to the education transformation agenda in Nigeria.

Green concept is a design concept and method based on saving resources and protecting the environment, paying attention to the protection of natural ecology, making full use of resources, putting people first and protecting the environment (Zhaofu Hong et al., 2019). The content of the green concept can be said to be a new social and economic development mode that takes environmental protection as an important support for sustainable development under the condition of restricting the capacity of ecological environment and resource carrying capacity (Allenby and Fullerton, 1991).

The latest research progress on the utilization of fly ash with high concentration alumina is summarized in this paper. High-alumina fly ash has been accidentally found in central and western regions of Inner Mongolia in recent years. The high content of Al2O3 (up to 50%) and the enrichments of some useful elements, such as gallium, titanium and light rare earth make it a valuable renewable resource. A comprehensive technique route utilizing fly ash was researched and developed.

Research in mathematics and science education reveals a disconnect for students as they attempt to apply their mathematical knowledge to science and engineering. This means that teaching of a mathematical concept is easy for a teacher but learning is difficult for his or her students. With this conclusion in mind, this paper investigates a particular calculus topic that is used frequently in science and engineering: the double integral..

The roots of the problems that arose in our country in the early 1990s were characterized by the Soviet era, the cotton monopoly was devastating, and the cultivation of cotton was one of the strongest goals and even the same colonial era that prevailed in people's lives and health. The health of the population in Uzbekistan was very low by 1989.

The teaching methodologies every day are innovating because the educational context requires it, for this reason it is our objective in the presentation of this work we can show a teaching method designed and developed by Marcos Andrés Colín López, Ph.D since At the time of applying it, it was possible to obtain and reduce the failure rates in the classroom in a percentage, considerably favorable, with respect to the traditional method, therefore the learning was designed to suit the students who so required.