O conceito de região e o ensino de Geografia: desencontros entre o saber escolar e o saber acadêmico

The school geographic knowledge must remain in line with theoretical advances produced by academic geographical knowledge. This is important for guarantee much better quality of education which is offered in schools. In this context, there are some important questions: do the teaching manual of geography for the basic level are updated according to the geographical knowledge produced by academia? Do the teachers of Geography in the basic education level have accompanied the theoretical and methodological innovations produced recently by geographical science? Through a research conducted with 51 teachers of Geography, who working in public schools in Marília, and after an analysis of geographic knowledge transmitted by textbooks used in most schools, the goal of this paper is to present some response to these questions. The research with teachers and the analysis of the contents of the textbooks were guided by one principal issue: the meaning of region.

Sistemas cerámicos puros parte 2: materiales, propiedades ópticas y consideraciones clínicas

While dentistry continues to advance, the aesthetic techniques have evolved in proceedings more effective, functional and biocompatible. Meanwhile, cosmetic dentistry has become a bit more complex and technically difficult. With improvement of the properties (physical and optical) of the ceramics and the establishment of a working protocol, ceramic restorations have become increasingly popular. Currently there are several ceramic systems have excellent optical properties such as opalescence, fluorescence, translucency, chromaticity, which allow the restoration to mimic the tooth structure. From the physical point of view has restored biomechanical integrity and strengthening the remaining tooth structure. All this has led the profession to experience the use of new ceramic systems ranging from conventional feldspathic ceramics to modem ceramic reinforced, injected or computer-aid made. The material selection should be based on clinical need, aesthetic and functional requirements, restoration site, prosthetic design and laboratory techniques. In this article we will deal with the characteristics of the materials, their optical properties and clinical considerations for proper selection.