1,720,999 research outputs found
Подобрување на квалитетот и квантитетот на периимплантното меко ткиво
Full text linkПреку ова предавање ќе се обидеме сликовито да ги прикажеме најчестите состојби со кои се соочуваме при постава на денталните импланти, недостатокот на коскена маса и квантум на меко ткиво, како и можните решенија со кои би превенирале постоперативни компликации и би обезбедиле успех на долг рок
Use of 3D CBCT in Oral Surgery and Implantology
Full text linkAim: 3D Computed tomography is a recording technique that allows the dentist to make an assessment with great accuracy of the surrounding bone structures, to determine the position of the nerves and other vital anatomical structures. This way of recording allows the oral surgeon to see the complete bone structure, all with one goal, prevention of complications during the performance of operative interventions.
Material and Method: For the realization of our work, we made recordings with 3D CBCT from Vatech, with
the Green X device with an exposure time of 4.9 seconds, unlike classic devices where the recording time is 24 seconds. The analysis of the recordings was done with Vatech Ez 3D-i software.
Results: The results of our investigation showed that all the structures that are of interest in performing the oral surgical intervention can be determined with great accuracy, and the density of the bone structures at the place where the implantology procedure will be performed can also be determined.
Conclusions: 3D Computed tomography of the jaw ridges represents a procedure that is mandatory when
performing the placement of dental implants and a recommended procedure when performing certain oral surgical interventions
Full-arch fixed overdenture in lower jaw - immediate solution for efficient mastication
Full text linkComplete anodontia and alveolar ridge resorption are responsible for lack of retention and stabilization of conventional acrylic lower denture.
Hybrid prostheses on 4 implants placed immediately in the first 7 days is therapeutic solution which allows patients better chewing and increased effective masticatory force.
Aim: The study aims to assess the functional and subjective treatment outcomes of full-arch fixed overdenture hybrid rehabilitation.
Material and Methods: 60 patients with hybrid prostheses over 4 implants were included in the study. The measurement of the masticatory force was done in the chewing center in the projection of the distally placed implant. Electro-gnathic-dynamometer measured the force of the muscle elevator and depressor of the mandible. Sensor was placed in plastic bite templates and the force value was registered three times.
Results: The mean masticatory forces measured in the chewing center before implants and overdenture were 95.7 N. One month later with the prosthesis the value was increased to 185.6 N and after 18 months 186.2 N.
Conclusion: There is significant increase in masticatory force in area of the distal implant. This is indicating increased resistance to load and higher efficiency of the chewing process after the treatment.
Keywords: overdenture, full-arch, hybrid prosthesi
Sophisticated graft materials and barrier membranes for oral surgery and dental implantology applications
Full text linkThe main aim of this review article is to evaluate the data bases presenting the different kinds of graft materials and barrier membranes applications which are dating in this new era and of it result and benefits from their usage.
Regarding to the need of graft materials and barrier membranes applications, it is known that bone loss and jawbone defects from different etiology are common, so their usage and features are increasingly being examined and analyzed. Significant is the fact that bone graft materials are used as a scaffolds to replace the missing bone and for new bone growth. These materials can be derived from a patient’s own body like natural substitutes or can be of a synthetic origin. On the other hand, the different barrier membranes have a role to protect and stabilize graft material and to enable better regeneration. The materials which are acceptable for grafting procedures depend from clinical case and from specific features. Advances in technology and sophisticated materials for bone grafting offer numerous solutions and different treatment options for patients with bone deficiency. The new way of solving large bone defects proved as successful in cases treated with a bone graft combined with a barrier membrane
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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