1,720,959 research outputs found
Dental erosion in patients with gastro-esophageal reflux (GERD)
No full textGastroesophageal reflux disease (GERD) occurs when gastric juice acidifies the mouth on a regular basis leading to a loss
of mineralised tooth tissue. Aim: To evaluate the risk of dental erosion in people with GERD and relate erosion to reported variables collected by questionnaire. Methods: A sample, composed of a group of patients over 18 years with GERD and an asymptomatic control group, was interviewed and examined for the evaluation of the Basic Erosive Wear Examination (BEWE),a questionnaire on symptoms of GERD and an interview for the determination of caries risk through Caries ManagementBy Risk Assessment (CaMBRA). The control group was patients presenting for the first dental visit at the Outpatient Department of the Policlinico Umberto I. Permission for the collection of data was obtained of the Director of the Department of Stomatology, Departments of Endoscopy and Surgery Hospital “Alfredo Fiorini” Terracina and Hospital “San Giovanni di Dio” of Fondi. Salivary pH was measured using litmus strip in a commercial kit. Results: 214 subjects of mean age 27 were equally divided by sex and age in the two experimental groups (control, n = 107 and GERD, n =107). A statistical correlation was shownfor the GERD group, level of risk of “severe” dental erosion (60% of those with GERD, 3% in the control group) and a diet rich in acidic foods and beverages. Acidic dietary habits with an average frequency of 3 times a day was present in the GERD group with a rate of 6%. A diet low in fatty foods was prevalent in the control group (63% in control vs 48% in the GERD).
The difference in salivary pH was highly significant for all variables. The GERD group has increased prevalence and severity of dental erosion. The pH of plaque and saliva were significantly correlated to dental erosion. The medical history and
salivary factors showed a correlation with the level of caries risk.
Conclusion:GERD emerges as a risk factor for dental erosion. Moreover it was noted that the GERD group has dietary habits that could increase acidity symptoms. It is therefore necessary to establish protocols for screening and counselling for prevention and management of dental erosion in patients
with GERD
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
Surgical management of impacted primary teeth: report of two cases
No full textAIM:
Impaction of deciduous teeth is an uncommon event. The purpose of this report is to describe two unusual eruption failures of a second primary molar and their treatment management.
CASE REPORT:
The diagnostic and therapeutic protocol of two cases selected at the Unit of Paediatric Dentistry, Department of Oral and Maxillofacial Science, "Sapienza" University of Rome, Italy, are presented. In both cases, the second deciduous molar was impacted, while no mechanical obstacle like odontomas or supernumerary teeth were present.
CONCLUSION:
The two case reports presented in this work are of scientific relevance, due to the rarity of this type of pathology
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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