1,721,038 research outputs found
Pathological and Molecular Features of Odontogenic Myxoma: A Systematic Review
No full textOdontogenic myxoma (OM) is an intraosseous benign mesenchymal odontogenic neoplasm. It is slow-growing and it may determine an extensive and painless expansion of the bone. The aim of the present article is to review the literature regarding the pathological features of OM as well as the genetic, pathogenetic, and molecular aspects of this neoplasm. An electronic search of the search terms "oral myxoma" and "odontogenic myxoma" was performed in the PubMed and Scopus databases for articles published between January 1990 and July 2024. Based on the abstracts of the articles, the articles were included or excluded in the review. Finally, data were extracted from the selected articles. Demographic data, number of patients, localization of OMs, and pathological features were extracted from the studies. The systematic review showed that OM affects patients at an average age of 8.1-40.1 years, with a female and mandibular predilection. Most study populations have a mean age within the 20-29 years and the 30-39 years decades. Most of the case series presented conventional microscopic findings, including stellate to spindle-shaped cells in a loose mucoid and/or myxoid extracellular stroma with sparse collagen fibrils. Most of the included articles confirmed the positivity to vimentin and SMA, the negativity to GFAP, keratin, NSE, and S-100. The invasive behavior of OMs has not been clarified yet. Further studies about biomarkers related to OM development and invasiveness are needed, in order to develop new therapeutical conservative approaches for this locally aggressive neoplasm
The surgical management of triple mandibular fractures: A challenging task
Full text linkBackground: The treatment of multiple mandibular fractures may often be challenging. The aim of this study was to evaluate the characteristics and outcomes of multiple mandibular fractures, with a focus on triple mandibular fractures. Material and Methods: Patients with multiple (triple) mandibular fractures were included. The following data were recorded for each patient: age; gender; cause of injury; sites of mandibular fractures; presence of complications. Facial width was esthetically evaluated through a clinical examination considering the inferior facial width, postoperative asymmetries, and facial esthetic harmony. Results: From January 1, 2010, to December 31, 2018, 25 patients (15 men, 10 women) underwent surgery for triple mandibular fractures and were included in the study. A predominance of symphysis/parasymphysis fracture associated with bilateral condylar/ramus fractures was observed, followed by symphysis/ parasymphysis fracture combined with mandibular angle fracture and condyle fracture. Most patients did not show any type of complications. An optimal esthetic outcome was obtained in 20 patients. Conclusions: A successful treatment of trifocal mandibular fractures may be achieved by different techniques, although it remains challenging. The re-establishment of the transversal bigonial dimension by a correct reconstruction of the mandibular arch should guide surgeons. The aim of the treatment should always be the successful rehabilitation of patients’ pretraumatic occlusion and function
Perception of gross anatomy education and dental drawing by dental hygiene students
Full text linkBackground: A complete and thorough understanding of head and neck anatomy by dental hygienists is fundamental for performing successful dental hygiene procedures in all clinical settings. Therefore, the aim of the present study was to assess the opinion of a population of dental hygiene students about the educational methods, their perceptions of the tooth drawing module, and their opinion about the content of Anatomy curriculum in an Italian University. Material and Methods: A comprehensive survey about was developed and electronically distributed to the dental hygiene students. The questionnaire consisted of questions on the application of anatomical knowledge in clinical practice, opinions on the contents and methods of gross anatomy education, and opinions on the tooth drawing module. Results: The survey was completely answered by 63 respondents. According to most respondents, drawing exercises helped to better understand the anatomy of the teeth, to incorporate dental anatomy more effectively, and to improve their ability to visualize tooth anatomy. Most respondents reported that molars were the most difficult teeth to be drawn. The respondents gave the maximum importance to the anatomical knowledge of the mandible, the maxilla, the masticatory muscles, the temporomandibular joint, the palate, the tongue, the salivary glands, the trigeminal nerve, and the facial nerve. Conclusions: Dental drawing exercises seem to be extremely important for Dental Hygiene Bachelor Degrees and they are well appreciated by students. Appropriate educational methods of anatomy should be used to improve the attention and the learning by dental hygiene students, thus finally hopefully resulting in the improvement of their clinical skills
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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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