1,720,963 research outputs found
TRIAL CLINICO SULL’ANALISI DEI FATTORI OCCLUSALI, MUSCOLARI ED ARTICOLARI CHE INFLUENZANO LA STABILITÀ DEL TRATTAMENTO ORTODONTICO
No full textIn ortodonzia, in ambito clinico, la comparsa di una recidiva rappresenta un rischio molto frequente, se non addirittura costante, al termine della terapia ortodontica e può rappresentare un notevole problema, soprattutto per come viene vissuta dal paziente nella maggior parte dei casi: un fallimento della terapia a cui si è sottoposto. Malgrado si sia cercato di indagare a lungo sulle cause della recidiva e cercato di intervenire per ridurne la comparsa, in ben poche situazioni l’ortodontista può avere la sicurezza che questa non si presenti. Viene da sé che i dispositivi di contenzione rappresentano, nella stragrande maggioranza dei casi, l’unico elemento utile a garantire il mantenimento a lungo termine del risultato ottenuto. È stato condotto uno studio clinico di coorte di tipo prospettico il cui obiettivo è stato determinare, tramite Little’s Irregularity Index (L.I. Index) e Peer Assessment Rating Index (PAR Index), l’influenza di fattori muscolari, occlusali e articolari sulla stabilità a lungo termine dell’allineamento dentale in pazienti adulti trattati ortodonticamente e provvisti di contenzione fissa da almeno 12 mesi, dopo aver eseguito la rimozione della stessa. Sono stati individuati 40 pazienti adulti che avessero terminato la terapia ortodontica da almeno un anno e ai quali, al termine del trattamento, fosse stato applicato un dispositivo di contenzione fissa sulla faccia linguale del gruppo dentale anteriore inferiore. La mantenuta collocazione del dispositivo e, di conseguenza, una conservata posizione dei denti coinvolti, hanno rappresentato i requisiti necessari per il definitivo reclutamento dei pazienti nello studio. A tempo T0, per ogni paziente, è stato registrato il grado di allineamento presente tra gli elementi dentali trattenuti dal retainer, adottando gli indici PAR e di Little; sono state inoltre rilevate le forze espresse dalle labbra e dalla lingua con l’ausilio rispettivamente di una dinamometria del muscolo orbicularis oris e di un’elettromiografia del ventre anteriore del muscolo digastrico; sono stati infine misurati, la distribuzione dei carichi masticatori occlusali per mezzo di un esame T-SCAN e l’equilibrio articolare mediante l’impiego dello strumento CPI-III. Si è quindi eseguita la rimozione del retainer presente. Sono stati praticati controlli semestrali (tempi T1, T2 e T3) eseguendo nuovamente tutti gli esami effettuati nel corso del primo controllo. Giunti al termine della fase clinica si proceduto all’elaborazione e all’analisi statistica dei dati raccolti. Un test statistico ANOVA ad una via è stato utilizzato per valutare la presenza di differenze statisticamente significative fra tutte le variabili ai diversi intervalli di tempo. Successivamente, per valutare l'effetto delle variabili che descrivono le caratteristiche muscolari, articolari e occlusali dei pazienti nel corso del tempo, sulla variazione T3-T0 delle variabili risposta (PAR Index e L.I. Index) che caratterizzano la stabilità dell'allineamento dentale, sono state utilizzate due regressioni logistiche binomiali. L'errore di I tipo è stato impostato come alfa<0.05. L'analisi statistica dei dati ottenuti ha messo in evidenza che maggiore è la forza espressa dal muscolo orbicularis oris, maggiore è il rischio di recidiva ortodontica, con una perdita della stabilità a lungo termine dell’allineamento del gruppo dentale anteriore inferiore. La mancanza di una contenzione permanente a seguito di una terapia ortodontica eseguita in pazienti adulti non può garantire il mantenimento a lungo termine dei risultati ottenuti.
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
Role of preoperative serum creatinine and estimated glomerular filtration rate values in asymptomatic patients undergoing carotid endarterectomy
No full textAIM: to evaluate the effect of Chronic Kidney Disease (CKD), assessed by preoperative estimated Glomerular Filtration Rate (eGFR) and serum Creatinine (Cr), on postoperative outcomes and long-term survival in asymptomatic patients undergoing carotid endarterectomy (CEA)
Late surgical conversion of failed Multilayer Flow Modulator stenting in thoraco-abdominal aneurysms
No full text : OBJECTIVES: The aim of this study was to report the outcomes of open or hybrid repair of failed thoraco-abdominal aortic aneurysm endovascular treatment with Multilayer Flow Modulator (MFM) stents. METHODS: All patients who underwent open or hybrid repair of a failed MFM aortic treatment were retrospectively analysed. Perioperative and postoperative data, as well as midterm survival, were assessed. RESULTS: Between 2013 and 2020, 39 patients received an open or hybrid conversion after endovascular treatment. Five of them [13%; 4 males; median age 68 years (interquartile range 66–76)] were previously treated with aortic MFM stents (Cardiatis, Isnes, Belgium). Among these, the median interval between index repair and conversion was 84 months (interquartile range 75–84). The median aneurysm diameter was 9.6 cm (interquartile range 8–10). Renovisceral vessels steno-occlusion was highly prevalent: 2 renal arteries were occluded; 3 coeliac trunks, 2 renal arteries and 1 superior mesenteric artery had a >70% ostial stenosis. Open standard thoraco-abdominal aneurysm conversion was performed in 3 fit patients, while a hybrid approach with visceral debranching and tube endografting was performed in 2 high-risk patients. Two patients (2 open repairs) died intraoperatively, and 1 (hybrid repair) postoperatively. The 2 successfully treated patients are alive at 4- and 34-month follow-up, respectively, with patent visceral branches. CONCLUSIONS: Open or hybrid thoraco-abdominal aortic aneurysm treatment after failed endovascular aortic repair with MFM stents might be the only surgical option to address sac enlargements and ruptures or branch-related failures. However, both procedures had a poor prognosis due to both the impaired preoperative patient’s status and the surgical complexity in the presented series
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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