The descriptive geometry constitues the foundation of the engineering sciences, so necessary to the specialists of this field. The aim of this paper is to establish the intersection curve between two cylinders and their unfoldings, by using the programmes:AutoCAD and Mathematica. We used the classical method and we first establish the intersection curve and then the cylinders unfoldings. To do this, we used the AutoCAD program. The same unfoldings can be obtained by introducing directly the curve equations (which are inferred) in Mathematica program.
In this paper the deformation state of a circular and isotropic plate is analyzed, using as methods of comparison the analytical, the finite element and the experimental element methods. In the finite element method, the plate is analyzed by several programmes, as well as assembled with the respective container.
Bone is a typical location of metastasis that usually reflects a negative outcome in oncologic patients. Once cancer has spread to the bones, it can rarely be cured, but sometimes it can be treated to minimize its rate of proliferation. Most skeletal metastases are produced by tumors originating in the breast and prostate. Osseous metastases are actually much more frequent than primary bone tumors, especially in adults. The diagnosis relies on signs, symptoms, and imaging techniques. This paper is a review of all cases of bone metastasis from our unit and a comprehensive review regarding the clinical approach and treatment of patients with such lesions.
With the growth of the aging population worldwide, osteoporosis represents a serious health problem, which implies higher morbidity and costs, despite the continuous advances in treatment options. It involves both sexes, although menopausal women are mainly affected. This article is a brief review of literature on current osteoporosis treatment options.
This report represents an analysis of 19 confirmed cases of breast cancer throughout a period of 14 months (January 2018 - February 2019), in which we assessed the incidence and sites of osseous metastases, in correlation with their histopathologic classification. This retrospective analysis is based on medical imaging techniques (X-ray radiography and nuclear medicine functional imaging).
Ankle fracture is one of the most common fractures in adults and among pregnant women. In pregnancy, the treatment must be prompt because of the risks and complications that could involve both mother and fetus. In this article, we reported the management of a patient with a bimalleolar fracture in pregnancy, its treatment, and evolution.
Morphological variability of paranasal sinuses is well known for endoscopic surgeons and anatomists alike. The ethmoid sinus is the most complex and variable of all paranasal sinuses, due to the fact that its development is not yet well known and is influenced by many factors. Volumetric studies of the sinuses have been made using dried skulls, cadaver heads and imaging studies, but there are still not sufficient data in order to name a standard value for each sinus. Few data can be found especially regarding the ethmoid sinus. In this paper, we measured the volumes of ethmoid lateral masses, and for anterior and posterior groups of cells, using imaging studies and a volumetric feature of our imaging studies. Results showed an average volume between 7.34 cm3 and 8.39 cm3 for the ethmoid lateral mass, between 4.33 cm3 and 4.92 cm3 for the anterior ethmoid and between 3.01 cm3 and 3.47 cm3 for the posterior ethmoid groups. We also found that the average volume of the anterior ethmoid occupies between 58-59% of the whole volume, while the posterior ethmoid occupies only 41-42% of this volume.