1,721,018 research outputs found
UTILIZZO DEL PIEZOSURGERY NELLA CHIRURGIA MINI-INVASIVA DEL RIALZO DI SENO
No full textOBIETTIVI La riabilitazione implantoprotesica del mascellare superiore risulta spesso ostacolata nei settori posteriori dall’estensione del seno mascellare. In caso di osso residuo di scarsa qualità e di altezza inferiore ai 5 mm, le tecniche chirurgiche tradizionali prevedono l’applicazione di procedure chirurgiche invasive per ripristinare un volume osseo sufficiente all’inserzione degli impianti, quali il rialzo del pavimento sinusale tramite antrostomia laterale. In questi casi è inoltre generalmente proposto un approccio two-stage, con inserzione degli impianti non contestuale al rialzo di seno, ma una volta avvenuta la guarigione dell’innesto
INFLUENZA DI DIVERSE SUPERFICI IMPLANTARI SULL'ACCUMULO DI PLACCA E IL COMPORTAMENTO DEI TESSUTI PERIIMPLANTARI. Studio clinico a 12 mesi
No full textOBIETTIVI: Valutare l’accumulo di placca e la risposta dei tessuti periimplantari a contatto con impianti con superficie sottoposta a doppia mordenzatura acida (DAE) (test) e con impianti con superficie DAE e una porzione coronale macchinata (controllo), simulando la loro esposizione nel cavo orale
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
Description and use of a new piezosurgery insert for tooth preparation
No full textPurpose In aesthetic rehabilitation the final touches and repositioning of the finishing line is a critical moment for the final success. In this situation the use of non-rotating instruments can be a valid alternative instead of rotating traditional ones. Moreover sonic and ultrasonic instruments allow greater control by the operator, without any lesion of gingival tissue
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
INFLUENCE OF ORAL CONDITIONS ON COLONIZATION BY HIGHLY TOXIGENIC STAPHYLOCOCCUS AUREUS STRAINS
No full textOBJECTIVES: As the oral cavity is regarded as a relevant
site for Staphylococcus aureus colonization and interhu-
man transmission, this study aimed to investigate whether
different oral conditions influence the rates of S. aureus
oral carriage and genetic characters of S. aureus isolates.
SUBJECTS AND METHODS: Staphylococcus aureus was
searched in samples collected from cheek, gingival mar-
gin, and anterior nares of 45 healthy subjects, 27 peri-
odontitis affected subjects, and 29 subjects with fixed
prosthetic restorations. Isolates were screened for 17
genetic determinants, and Partial Least Square Discri-
minant Analysis was performed to evaluate whether
specific characters correlated with oral condition or site
of isolation.
RESULTS: The three subject groups showed comparable
nasal carriage rates but, both the periodontitis and
prosthetic restoration groups showed significantly higher
oral carriage rates, as compared to healthy subjects
(P = 0.01 and 0.02, respectively). Moreover, periodontitis
affected subjects hosted strains possessing a distinct
genotypic and phenotypic background, characterized by
the presence of a larger number of exotoxins encoding
genes.
CONCLUSIONS: These data confirm that the oral cavity
is an important site of S. aureus colonization and dem-
onstrate that conditions modifying the oral environment,
as the presence of periodontitis and of fixed prosthetic
restorations, promote S. aureus carriage and may favor
the spread of more pathogenic strains
Temporary stabilization of periodontopathic tooth fragments with substitution of the missing elements
No full textFattori chirurgici-protesici nell’inserimento implantare postestrattivo immediato in area estetica:caso clinico
No full textL’inserimento degli impianti in una posizione ideale, protesicamente guidata, può essere osta-colato dall’insufficiente disponibilità di volumi ossei nei siti postestrattivi di aree ad alta valenza estetica. Negli ultimi anni è stato proposto da diversi autori un approccio chirurgico, noto come preservazione dell’osso alveolare (Alveolar Ridge Preservation, ARP), allo scopo di ridurre al minimo le variazioni dimensionali successive all’avulsione dentale. L’ARP comprende un’ampia varietà di procedure, che consistono principalmente nell’impiego di materiali d’innesto per il riempimento dell’alveolo, da soli o in combinazione con membrane riassorbibili-non riassorbibili e l’allestimento di lembi chirurgici a copertura del difetto. Dall’analisi delle revisioni sistematiche e meta-analisi attualmente disponibili in letteratura, le tecniche ARP sembrano offrire vantaggi piuttosto limitati rispetto alla guarigione spontanea dell’alveolo. Inoltre, resta ancora acceso il dibattito su quale fra le varie tecniche di ARP mostri maggior efficacia nel mantenimento delle dimensioni dell’osso alveolare residuo e sul ruolo dell’ARP in merito al miglioramento dei risultati clinici di sopravvivenza implantare. In questo articolo viene riportato un caso clinico di inserimen-to implantare immediato nell’alveolo postestrattivo di un incisivo centrale senza utilizzo di innesti ossei, allo scopo di mostrare come la corretta gestione dei fattori chirurgici (posizionamento implantare palatino con mantenimento dell’integrità della corticale ossea vestibolare) e protesici (condizionamento dei tessuti molli attraverso il provvisorio immediato) sia determinante per il successo clinico delle riabilitazioni implantari nei siti postestrattivi di aree estetiche.The implant placement in the ideal prosthetic position could be complicated if insufficient bone volumes are available in post-extractive sites of highly aesthetic areas. In recent years a surgical approach, known as alveolar ridge preservation (ARP), has been proposed to reduce the dimensional changes of the bone following tooth loss. ARP includes a large amount of techniques, mainlyconsisting in the use of graft materials to fill the socket alone or in combination with resorbable/not resorbable barriers and/or surgical flaps aimed to cover the bone defect. According to available meta-analysis andsystematic reviews of the Literature, ARP techniques do not seem to offer limited advantagescompared to socket spontaneous healing. Moreover, there is still a debate concerning which among the various ARP techniques shows higher efficacy in keeping residual alveolar bone volumes, as well as the ARP role in improving implant-related outcomes. In the present paper it is reported a clinical case of immediate implant placement in central incisor post-extractive socket without the use of bone graft, in order to show how the proper management of surgical factors (implant placement in palatine position with the maintenance of buccal cortical bone integrity) and prosthodontic factors (soft tissues conditioning with the relining of the acrylic resin provisional crown) is essential for the clinical success of implant-supported rehabilitations in post-extractive sites of aesthetic area
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