1,720,969 research outputs found
Investigation on periodontal status of depressed patients treated with tricyclic antidepressants
No full textIndagine sullo status parodontale di pazienti depressi in terapia con antidepressivi triciclici
Full text linkOBJECTIVES. The aim of this work was to evaluate the effects of tricyclic antidepressants on oral health. MATERIALS AND METHODS. A questionnaire including information about oral hygiene and diet was filled in by every subject; moreover a periodontal examination and a salivary test were performed on 30 patients receiving chronic antidepressant therapy with tricyclics (test group) and on 30 healthy patients (control group). t-test and Chi-square test were used in order to evaluate statistical differences between the groups and the significant rate was set at p 0.05). The test group showed a higher xerostomia and a reduced gum brushing duration and technique (p < 0.05). CONCLUSIONS. The different periodontal status found in subjects taking tricyclics may be due to oral hygiene behavior and partly to the antimuscarinic effect of these drugs with consequent xerostomia
Impact of self-ligating orthodontic brackets on dental biofilm and periodontal pathogens in adolescents
No full textThe aim of the present prospective study was to evaluate periodontal health and subgingival microbiological alterations in adolescents treated with fixed self ligating orthodontic brackets in comparison to subject without any orthodontic appliance. A total of 40 adolescents (23 females and 17 males; mean age: 13.2 ± 3.2 years) were included: 30 subjects with self ligating brackets (test group) and 10 patients without orthodontic appliances (control group). Follow-ups were as follows: T1 (1 month), T2 (3 months), T3 (6 months) from the beginning of the orthodontic therapy. Clinical parameters (plaque index, gingival index and clinical attachment level) were measured for every patient and a microbiological analysis was performed. Mann Whitney test was performed to evaluate clinical parameters between test and control group and Friedman test and Fisher test were adopted to evaluate intra group differences at different follow-ups. Student T-test was performed to compare clinical attachment level between the two groups. Significance level was set at p<0.05. No periodontal pathogens and no clinical attachment loss were found in the whole sample. A slightly higher plaque index and gingival inflammation were recorded in the test group in comparison to the controls
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
Levels of salivary immunoglobulins and periodontal evaluation in smoking patients
Full text linkAbstract
Objective: The aim of this study was to assess the level of salivary immunoglobulins and periodontal status in
smokers and non-smokers.
Materials and methods: Unstimulated saliva of 30 subjects (mean age 24.2 ± 3.5 years) who were smokers (test
group) and of 30 subjects (mean age 25.3 ± 3.8 years) who were non-smokers (control group) was collected and
centrifugated; IgA, IgG, and IgM were measured with the colorimetric immunoenzymatic method. Moreover, the
following periodontal clinical parameters were recorded for each subject: plaque index (PI), gingival index (GI),
probing depth (PD), and clinical attachment level (CAL).
Results: A significantly (p< 0.05) lower Ig level was observed in smoking patients (IgA: 20.0 ± 1.2 mg/dl; IgM:
19.5 ± 1.6 mg/dl; IgG: 8.1 ± 1.4 mg/dl) compared to levels in the non-smoking control group (IgA: 234.1 ± 65.2 mg/dl;
IgM: 121.0 ± 31.7 mg/dl; IgG: 1049.4 ± 102 mg/dl). In the test group, PI (2.2 ± 0.3), GI (2.4 ±0.5), PD (49.3 ± 9.2%),
and CAL (49.3 ± 4.6%) were higher (p< 0.05) than those observed in the control group (PI: 0.8 ± 0.4; GI: 0.7 ± 0.3;
PD: 10.6 ± 2.4%; CAL: 3.1 ± 0.8%).
Conclusion: Smoking subjects showed lower levels of salivary IgA, IgG, and IgM and a worse periodontal condition
than non-smoking subjects. On the base of our study, as smoking subjects also had lower levels of IgA, IgG, and IgM
in their saliva than non-smoking subjects, despite the fact that there is little evidence that the salivary Igs have a
protective action against periodontitis and that the whole saliva does not result in whole from the salivary glands, it
can be concluded that the deteriorated periodontal health conditions of these patients can be attributed in part to a
lowering of the host’s defense due to a decrease in the quantity of Igs in salivary fluid
- …
