1,720,960 research outputs found
Treatment of gingival recession with hypersensitivity using free soft-tissue graft procedures
No full textIntroduction: The main goal of root coverage procedure is complete coverage of the recession defect with good esthetic results related to the adjacent soft tissues and minimal probing depth after the healing process. Aim: The aim of this study was to compare the efficiency of surgical and nonsurgical treatment options in patients with gingival recession and dentin hypersensitivity. Materials and methods: Sixty patients with gingival recession Miller Class I and II with hypersensitivity and esthetic concerns were included. Of these, 30 patients were treated with free soft-tissue graft procedures and 30 people as controls were treated with anti-hypersensitivity gel. The surgically treated patients were allocated into two groups: 20 of them with coronally advanced flap with subepithelial connective tissue graft and 10 with free gingival graft. Results: We achieved full coverage on the exposed root surfaces in 19 patients treated with coronally advanced flap and de-epithelized graft and partial root coverage in one of them. Patients treated with free gingival graft procedure achieved full root coverage in 7 of them and partial in 3 of them (gingival recession = 1 mm after surgery). The surgical treatment allowed resolution of the esthetic issues of patients and elimination or reduction of the dentin hypersensitivity. In the control group, there was partial elimination of root sensitivity. Conclusions: In the surgically treated group with both techniques, we achieved resolution of dentin hypersensitivity and coverage of the root surface with healthy keratinized tissues. These techniques can be considered as treatment options for dentin hypersensitivity depending on the indications
Prognostic value of matrix metalloproteinases in oral squamous cell carcinoma
Full text linkThe aim of this study was to investigate whether there is a correlation between the expressions of four matrix metalloproteinases (MMPs): MMP-2, MMP-7, MMP-9 and MMP-13, and the TNM (tumour-node-metastasis) stages of oral squamous cell carcinoma (OSCC); and to explore the implication of these MMPs in OSCC dissemination. Samples from 61 patients diagnosed with oropharyngeal tumour were studied by immunohistochemistry against MMP-2, MMP-7, MMP-9 and MMP-13. The assessment of immunoreactivity was semi-quantitative. The results showed that MMP-2 and MMP-9 had similar expression patterns in the tumour cells with no changes in the immunoreactivity during tumour progression. MMP-9 always had the highest expression, whereas that of MMP-2 was moderate. MMP-7 showed a significant decrease in expression levels during tumour evolution. MMP-13 had constant expression levels within stage T2 and T3, but showed a remarkable decline in immunoreactivity in stage T4. No significant differences in the MMPs immunoreactivity between tumour cells and stroma were observed. Although strong evidence for the application of MMPs as reliable predictive markers for node metastasis was not acquired, we believe that combining patients' MMPs expression intensity and clinical features may improve the diagnosis and prognosis. Strong evidence for the application of MMPs as reliable predictive markers for node metastasis was not acquired. Application of MMPs as prognostic indicators for the malignancy potential of OSCC might be considered in every case of tumour examination. We believe that combining patients' MMPs expression intensity and clinical features may improve the process of making diagnosis and prognosis
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
Total Oral Rehabilitation with Dental Implants in an Elderly Patient with Concomitant Diseases: a Case Report
No full textWe report a case of restoration of the masticatory and phonetic functions of a senior patient with comorbidities who receives systemic medication and lacks sufficient bone volume for implant placement in the accurate position. X-ray shows severe asymmetric atrophy of the mandible, especially on the right sight, which affects the location of the mandibular canal. This greatly limits and complicates the restoration of the masticatory and phonetic functions with conventional prostheses. Adequate management of medication and long-term disease control of the patient allow safe surgery for tooth extraction and placement of intraosseous implants in the jaw bones
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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