1,720,962 research outputs found
Hard tissue preservation in minimally invasive mandibular third molar surgery using In Situ hardening TCP bone filler
Full text linkIn Situ Endoscopic Analysis of Bone Microstructure and Vascularization in Post-Extraction Sites Immediately After a Minimally Invasive Vertical Tooth Extraction in Teeth with Different Periodontal Status
No full textHard Tissue Preservation in Minimally Invasive Mandibular Third Molar Surgery Using In Situ Hardening TCP Bone Filler
No full textThe first author was supported in part by MEC Project, PAI80160012, of the National Commission for Scientific and Technological Research, CONICYT, Chile. The study was supported with biomaterial from Sunstar Suisse SA, Etoy, Switzerland, to the Universidad de La Frontera, Temuco, Chile (DIUFRO Project no. DI17-0170).El primer autor recibió financiación parcial del Proyecto MEC, PAI80160012, de la Comisión Nacional de Investigación Científica y Tecnológica, CONICYT, Chile. El estudio contó con el apoyo de biomaterial de Sunstar Suisse SA, Etoy, Suiza, para la Universidad de La Frontera, Temuco, Chile (Proyecto DIUFRO n.º DI17-0170)
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
Support Immersion Endoscopy in Post-Extraction Alveolar Bone Chambers: A New Window for Microscopic Bone Imaging In Vivo.
Full text linkUsing an endoscopic approach, small intraoral bone chambers, which are routinely obtained during tooth extraction and implantation, provide visual in vivo access to internal bone structures. The aim of the present paper is to present a new method to quantify bone microstructure and vascularisation in vivo. Ten extraction sockets and 6 implant sites in 14 patients (6 men / 8 women) were examined by support immersion endoscopy (SIE). After tooth extraction or implant site preparation, microscopic bone analysis (MBA) was performed using short distance SIE video sequences of representative bone areas for off-line analysis with ImageJ. Quantitative assessment of the microstructure and vascularisation of the bone in dental extraction and implant sites in vivo was performed using ImageJ. MBA revealed bone morphology details such as unmineralised and mineralised areas, vascular canals and the presence of bleeding through vascular canals. Morphometric examination revealed that there was more unmineralised bone and less vascular canal area in the implant sites than in the extraction sockets
The use of cortical particulate allograft mixed with plasma-rich fibrin in severe maxillary alveolar ridge atrophy
No full textAtrophy in the edentulous maxilla typically consists of vertical bone loss in the posterior maxilla due to pneumatization of the maxillary floor and transverse reduction in anterior areas. The purpose of this study was to perform bilateral sinus floor augmentation and maxillary alveolar bone reconstruction by autologous platelet-rich fibrin (PRF) mixed with mineralized cancellous bone allograft and PRF membranes. Method: Six patients (3 men and 3 women, age 46-65 years) with severe maxillary atrophy were selected for this study. The patient's blood was centrifuged to obtain PRF. Mineralized cancellous bone allograft (Zimmer Puros (R)) was mixed with PRF and applied for sinus floor augmentation in posterior and lateral augmentation in anterior maxillary atrophy. Additionally, PRF membranes were placed over augmented area. Evaluation was carried out before and six months after surgery using CBCT to measure alveolar site dimension. Histology was obtained from corebiopsies taken for implant insertion to evaluate quality of bone regeneration. Results: The use of PRF as cover membrane permitted rapid tissue reparation, high bone quality was detected in sites augmented with bone allograft and PRF. The horizontal alveolar bone volume after 6 months and the vertical bone augmentation increased at about 10 mm. Conclusion: Based on the preliminary case series, the combination of PRF membrane and PRF mixed with bone allograft represents a predictable method of augmenting the sinus floor as well as the deficient anterior maxilla to achieve rehabilitation of the atrophic maxilla with dental implants
The use of cortical particulate allograft mixed with plasma-rich fibrin in severe maxillary alveolar ridge atrophy
No full textAtrophy in the edentulous maxilla typically consists of vertical bone loss in the posterior maxilla due to pneumatization of the maxillary floor and transverse reduction in anterior areas. The purpose of this study was to perform bilateral sinus floor augmentation and maxillary alveolar bone reconstruction by autologous platelet-rich fibrin (PRF) mixed with mineralized cancellous bone allograft and PRF membranes. Method: Six patients (3 men and 3 women, age 46-65 years) with severe maxillary atrophy were selected for this study. The patient's blood was centrifuged to obtain PRF. Mineralized cancellous bone allograft (Zimmer Puros (R)) was mixed with PRF and applied for sinus floor augmentation in posterior and lateral augmentation in anterior maxillary atrophy. Additionally, PRF membranes were placed over augmented area. Evaluation was carried out before and six months after surgery using CBCT to measure alveolar site dimension. Histology was obtained from corebiopsies taken for implant insertion to evaluate quality of bone regeneration. Results: The use of PRF as cover membrane permitted rapid tissue reparation, high bone quality was detected in sites augmented with bone allograft and PRF. The horizontal alveolar bone volume after 6 months and the vertical bone augmentation increased at about 10 mm. Conclusion: Based on the preliminary case series, the combination of PRF membrane and PRF mixed with bone allograft represents a predictable method of augmenting the sinus floor as well as the deficient anterior maxilla to achieve rehabilitation of the atrophic maxilla with dental implants
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