1,720,956 research outputs found
Efficacy of the lateral advanced flap in root-coverage procedures for mandibular central incisors: A 5-year clinical study
No full textThe aim of this study was to determine the efficacy of the lateral advanced flap in root-coverage procedures for mandibular incisors and to evaluate pain after treatment. A total of 15 patients who required treatment for gingival recessions were selected from the University of Genoa Laser and Restorative Dentistry Department. The inclusion criteria were the presence of at least one 3-mm gingival recession defect of a mandibular incisor and 3 mm or more of keratinized tissue width on the immediately adjacent tooth. One calibrated masked examiner performed the clinical measurements, including recession depth and width, probing depth, clinical attachment level, and keratinized tissue width. Patients were checked 7, 14, and 30 days after surgery and were included in supportive periodontal maintenance every 4 months. Further follow-ups were done at the first, third, and fifth year postsurgery when the same baseline assessment parameters were recorded according to the root-coverage esthetic score (RES). Numeric score recorded pain evaluations showed a mean of 3 at the day of the surgery, 2 in the first day after the surgery, and no significant scores were referred in the following days. Mean recession depth was 3.2 ± 1.3 mm at baseline; at 5 years, RES showed a positive increase of all scores. The laterally coronally advanced surgical technique was very effective in treating isolated gingival recessions. It combined the esthetic and root-coverage advantages of the coronally advanced flap with the increased gingival thickness and keratinized tissue associated with the lateral gingival flap
The Use of Full-Contour Zirconia for Full-Arch Implant-Supported Rehabilitations—A Narrative Review
No full textSocket Preservation in Dentistry: a Comprehensive Review on Efficacy, Tissue Volume Maintenance, and Economic Considerations with Focus on Membrane Types and Bone Regeneration Dynamics
No full textBone Stability After Immediate Implants and Alveolar Ridge Preservation: A 15-Year Retrospective Clinical Study
No full textBackground: In modern dentistry, alveolar socket preservation after tooth extraction plays a critical role in maintaining the alveolar ridge for future dental implants. This retrospective clinical study evaluated bone-level changes 15 years after immediate implant placement, coupled with alveolar ridge preservation. Methods: Fifty non-smoking patients aged 25 to 75 (30 males and 20 females) who underwent single-implant rehabilitation in both anterior and posterior regions of the upper and lower jaws were included. The study examined bone levels and implant survival over time, using standardized intraoral radiographs at 1, 5, and 15 years post-loading. Implants were placed immediately after atraumatic extraction, and the residual gap was grafted with bovine hydroxyapatite and covered with a collagen membrane. The primary outcome was bone-level stability, while secondary outcomes included implant failure. No temporary crowns or removable dentures were provided during healing. Radiographs were digitized for detailed analysis. Results: The results for 50 patients with immediate implant placement showed that bone-resorption levels were significantly higher in the upper jaw than in the lower jaw. Conclusions: Posterior implants exhibited greater bone loss than anterior implants, particularly at 1 year and 15 years, while no implant failures occurred
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
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