1,720,961 research outputs found
Dignosis and treatment of dens invaginatus with open apex in adult patient, by using cone-beam computed tomography and operative microscope
No full textConservative Surgical Treatment of Bisphosphonate-Related Osteonecrosis of the Jaw with Er,Cr:YSGG Laser and Platelet-Rich Plasma: A Longitudinal Study
Full text linkIntroduction. The management of bisphosphonate-related osteonecrosis of the jaw (BRONJ), with no evidence-based guidelines, remains controversial. We aimed to evaluate the efficiency of a conservative surgical treatment combining Er,Cr:YSGG laser and platelet-rich plasma (PRP) for the treatment of BRONJ in cancer patients. Methods. We performed a longitudinal cohort study. Inclusion criteria were (1) age ≥ 18 years; (2) cancer diagnosis; (3) treatment with NBP because of the underlying cancer. Results. We consecutively recruited ten patients diagnosed with BRONJ in stage I or II. These patients underwent a surgical laser-assisted therapy together with autologous PRP. At the latest follow-up at 12 months, clinical improvement was observed in eight patients. Registration Number is IRCT20180329039159N1. Conclusion. We could successfully manage the BRONJ utilizing this combined protocol to heal the 30% of surgically treated sites and to improve the 50% of patients' lesions clinically. Our findings suggest that a surgical approach combined with Er,Cr:YSGG laser and PRP benefit cancer patients with general health issues
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
INCREMENTI TERMICI IN VITRO UTILIZZANDO DUE DIVERSI SISTEMI DI OTTURAZIONE CANALARE A CALDO: SISTEMA E&Q VS SYSTEM B
No full textOBIETTIVO DELLA RICERCA: Una delle più comuni cause di insuccesso in Endodonzia è certamente rappresentata dall’incompleta otturazione del sistema dei canali radicolari, in tal senso, un materiale da otturazione canalare dovrebbe penetrare e diffondere in modo omogeneo in tutto lo spazio endodontico. La guttaperca è il più comune materiale da otturazione usato e viene comunemente utilizzata in associazione con il cemento canalare. Sono da preferire tecniche che prevedono quantità minime di cemento, come la condensazione verticale a caldo. L’originale tecnica di compattazione verticale a caldo è stata modificata da Buchanan che ha introdotto la tecnica dell’onda continua di condensazione mediante la sorgente di calore System B.
Scopo di questo studio è quello di valutare due diversi sistemi di compattazione della guttaperca a caldo che utilizzano entrambi la tecnica dell’onda continua di condensazione secondo: il System B (Sybron Endo) e E&Q Master (Sweden&Martina). Attraverso una analisi comparativa si sono valutati in vitro, mediante termocoppie, gli incrementi di temperatura lungo la superficie radicolare e lungo le pareti canalari, a vari livelli, durante l’uso del System B e del sistema E&Q Master.
MATERIALI E METODI: E' stato realizzato uno "split-tooth model", mediante un canino mascellare non cariato, estratto per motivi parodontali. La sagomatura del canale è stata eseguita utilizzando strumenti in Ni-Ti "M-twoTM" (Sweden&Martina®). Per misurare la temperatura sono stati realizzati 6 solchi: 3 nella metà mesiale a 2, 4 e 6mm dalla LL, estensi sino alla superficie radicolare, 3 solchi nella metà distale a 2, 4 e 6mm estesi sino alla porzione intracanalare. In ognuno
di questi solchi è stata inserita una termocoppia di tipo T collegata ad un termometro digitale. Sono state effettuate 20 otturazioni con il Sistema E&Q Master mediante un plugger FM portato a 3,5 mm dalla LL e 20 otturazioni con il System B, settato a 250°C mediante un plugger FM portato sempre a 3,5 mm dalla LL. RISULTATI: Durante la tecnica dell’onda continua di condensazione si realizzano, in entrambe le sistematiche, due picchi di temperatura, il primo causato dall’inserimento del plugger all’interno del canale, il secondo durante la fase di separazione. Per quanto riguarda il System B, gli incrementi termici medi più alti sono stati registrati nella termocoppia N.6 che ha riportato incrementi pari a 2,8°C, mentre quelli più bassi sono stati registrati nella termocoppia N. 1 che hanno riportato valori di 0,4°C. Per quanto riguarda il Sistema E&Q Master, gli incrementi termici medi più alti sono stati registrati nella termocoppia N.6 che ha riportato incrementi pari a 6,30°C con picchi che raggiungono i 42,98 °C mentre quelli più bassi nella termocoppia N. 1 che ha riportato valori di 2,11°C. CONCLUSIONI: La diffusione del calore all’interno del canale è influenzata da molti parametri come gli spessori dentinali residui, la circolazione sanguigna e la bassa conducibilità termica della dentina. Gli incrementi termici medi sono stati registrati in relazione alla temperatura ambiente e dai risultati ottenuti si è visto che si hanno, sia sulla superficie esterna sia nella massa di guttaperca, incrementi medi inferiori a 10° C. Dall’analisi dei risultati ottenuti possiamo concludere inoltre che entrambe le sistematiche ci consentono di ottenere un valido incremento termico della massa di guttaperca. I risultati evidenziano che l’uso del Sistema E&Q Master e del System B, in vitro, sembra non determinare un pericoloso incremento di temperatura lungo la superficie radicolare tale da indurre danni iatrogeni
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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