1,720,962 research outputs found
Aspartate aminotransferase activity in peri-implant mucositis: experimental peri-implant mucositis model of 14 days
No full textBACKGROUND: Experimental pen-implant mucositis has been studied from various prospective in a duration of 21 days. Given the higher sensitivity of pen-implant mucosa the aim of the present study was to evaluate if a duration of 14 days would be sufficient to establish a state of measurable inflammation. METHODS: Twenty patients of age 57 11-year-old contributed with 20 clinically healthy implants and teeth. They were instructed to use an individual stent in the selected elements prior to performing oral hygiene for 14 days. For each element plaque index (P11), probing depth (PD), bleeding on probing (Bops) were reported at 0 days and 14 days of plaque accumulation. Aspartate aminotransferase activity was measure at both time points from the crevicular fluid. RESULTS: Both implant and teeth developed similar increased response of inflammation at 14 days compared to day 0: BoPs of 4.2+1.8 (P 0.06) and BoPs of 3.1+2.2 (P 0.048) for implant and tooth, respectively. Implant presented deeper pocket depth at both time periods but less plaque accumulation. AST activity did not increased significantly, but it was significantly higher at implant level
Clinical outcomes of experimental gingivitis and peri-implant mucositis treatment with professionally administered plaque removal and photodynamic therapy
No full textAim: To comparatively evaluate the outcomes of professionally administered plaque removal (PAPR) and photodynamic therapy (PDT) in the treatment for experimentally induced gingivitis (G) and peri-implant mucositis (p-iM). Materials and methods: Twenty systemically healthy patients, each contributing a single implant-supported unit in a posterior sextant and a tooth within the same quadrant, were selected. Patients underwent an experimental G and p-iM trial consisting of a 2-week period of undisturbed plaque accumulation and a 6-week resolution phase following treatment administration. Supragingival plaque levels, probing depth (PD) and bleeding on probing (BoP) were recorded at experimental tooth and implant either before or 2 and 6 weeks after administration of PAPR+PDT. Results: The results of the study indicate that (i) treatment with PAPR and PDT resulted in a significant reduction in the median number of BoP+ sites from 1 to 0 around teeth (P=.01) and from 3.5 to 2.0 around implants (P=.03), with the treatment effect being affected by initial PD; (ii) implants showed a significantly higher number of residual BoP+ sites following treatment, and the difference between implants and teeth was particularly pronounced (implants: 42%; teeth: 22%) at shallow (1-2 mm) sulci as observed at 6 weeks following treatment. Conclusions: G and p-iM can be effectively treated with PAPR+PDT. At shallow (1-2 mm) sulci, implants may show a higher number of residual bleeding sites when compared to teeth, and the number of residual bleeding sites following PAPR+PDT increases with increasing PD around either teeth or implants
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
Clinical evaluation of the regenerative potential of EMD and NanoHA in periodontal infrabony defects: a 2-year follow-up
No full textkoamabayili/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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