1,720,967 research outputs found
Immediate post-extractive implantation with provisionalization of two deciduous canines and related impacted permanent canines, a case report.
No full textThis is a case study of replacing two maxillary deciduous canines and related impacted permanent canines with two single implants, in conjunction with grafting lost hard tissue. By using immediate post- extraction implant placement and provisionalization protocols, the stability of the implant was ensured while bypassing the bony void created by removal of the primary canines. In this respect, it was originally planned that a minimum healing period of one year would be observed.Taking the time to observe any changes provides an opportunity to evaluate the gingival esthetic before the final step is carried out. By the time the final restorations were fitted, the graft and tissues were stable. The time involved not only placed biology on the clinician's side, but also helped the patient to spread the cost. CLINICAL RELEVANCE: In modern aesthetic dentistry harmonious results can be achieved relatively quickly, when the prerequisites for aesthetic success have already been met but, as this case demonstrates, human biology often requires more time and patience for augmented hard and soft tissues to heal and mature
Key Factors for Predictable Aesthetics in Single Tooth Immediate Implantation with Provisionalization
No full textEarly implant placement is one treatment option for implant therapy following a single-tooth extraction in the anterior maxilla. In this article some key factors are presented to analyze and follow in an effort to obtain a predictable and acceptable esthetic result. The creation of predictable peri-implant esthetics requires proper preservation of the osseous and soft tissues around the failing teeth, proper 3-D implant placement and proper understanding of the prosthetic management. The surgical technique presented here is characterized by tooth extraction without flap elevation, implant placement in a correct three-dimensional position, simultaneous contour augmentation on the facial aspect with connective tissue grafting combined with heterologous bone chips filled into the implant bone gap
Granular deproteinized bovine bone for horizontal ridge augmentation: a non-conventional clinical technique (Impiego di osso bovino deproteinizzato granulare negli incrementi orizzontali: presentazione di una tecnica non convenzionale)
No full textMaxillary sinus floor augmentation with vegetal hydroxyapatite “versus” demineralized bovine bone : a randomized clinical study with a split-mouth design
Full text linkPurpose: The objective of this paper was to compare histologically and histomorphometrically a
hydroxyapatite originated by algae (Algipore) versus demineralized bovine bone (Bio-Oss Geistlich
Pharma, Wolhusen, Switzerland) utilised as bone substitutes in maxillary sinus floor elevation with
a split-mouth design.
Materials and Methods: Five healthy patients underwent a bilateral maxillary sinus floor elevation
procedure under local anesthesia. In each case, residual posterior maxillary bone height was between 2 mm and 5 mm. The original bone was augmented with a split-mouth design with 100% Algipore on the test side and 100% Bio-Oss on the contralateral control side. After a healing period of 6-8 months during the re-opening surgery biopsies were retrieved and Xive Implants (Dentsply Implants, Mannheim, Germany) were placed.
Results: At microscopic level both Bio-Oss and Algipore blocks resulted well osseointegrated,
without inflammatory infiltrate, with an high level of mineralization, without gap between the bone
and biomaterial interfaces that resulted indistinguishable. A close contact between the two faces was
observed without the presence of slits. Histomorphometrical analysis showed that, on average, the
percentage of medullary space was higher for the Bio-Oss compared with Algipore (38.61% ±8.90%
vs. 29.23% ±7.89%). In contrast, the mean value of residual particles of biomaterials was higher in
Algipore than in Bio-Oss specimens (42.86% ±18.61% vs. 22.30% ±6.40% respectively).
Conclusions: The data confirmed that sinus lift carried out with Algipore performed in a similar way
of that carried out with Bio-Oss and that this material is safe, predictable and without invasiveness
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
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