1,720,958 research outputs found
Proposal of a New Dynamic Distraction Device to Treat Complex Periarticular Fractures of the Metacarpophalangeal Joint of Long Finger
No full textBackground: Complex periarticular fractures of the metacarpophalangeal joint (MCPJ) are often challenging to treat. Conservative and operative treatments are often burdened with stiffness, loss of function, and poor clinical outcome. These phenomena could be a direct consequence of long period of immobilization. To promote a short time of immobilization and a quick return to daily activities, it is mandatory to stabilize the fracture maintaining the active range of motion (AROM) of the ray. A simple solution is to reduce the fragments by means of dynamic ligamentotaxis. The authors propose a new dynamic distraction device (DDD) for the MCPJ. Methods: The DDD for the MCPJ was made of Kirschner wires bent and connected to counteract dislocation forces and to allow mobilization of the joint. The DDD was tested on a cadaver model under a simulated load in physiological conditions, and also in metacarpal and proximal phalanx (P1) fracture patterns. The effectiveness of the device was evaluated under fluoroscopy. Results: The data showed that DDD is able to achieve fracture reduction through ligamentotaxis and primary fragments stability and to avoid secondary dislocation during AROM of complex periarticular fractures of the MCPJ. Conclusions: The frame could be an alternative option to treat periarticular fractures of the MCPJ. The DDD implant has several advantages: It is time efficient because assembly and application take only few minutes. Furthermore, it is very versatile; indeed, it can be used in all metacarpal and phalanx bones, even in the central rays. © The Author(s) 2018
Does the current Italian healthcare system deal with the perspective of young surgeons? An assessment of the quality of professional life among orthopedists within the first 10 years of their careers
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Evaluation of orthopaedic fast-track surgery from 2009 to 2013 in an Italian hospital
Full text linkEach year millions of patients are treated for joint pain with total joint arthroplasty, and the numbers are expected to rise. Total knee arthroplasty (TKA) has an integral role in the treatment of severe knee joint diseases including osteoarthritis and rheumatoid arthritis and long-term results for pain relief and functional improvement have been excellent.The aim of this study was to evaluate whether the application of the Fast-Track method has reduced the LOS during a period of 5 years, while taking care of the patients outcome and the readmission rate in our Department
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
l'impiego dei metalli porosi negli interventi di revisione di protesi totale di anca
No full textL’intervento di protesi d’anca, frutto di più di un secolo di ricerca, fallimenti e innovazioni, può oggi essere considerato una delle pratiche chirurgiche di maggior successo.
Il buon rapporto costo/beneficio, l’alto tasso di sopravvivenza e indicazioni chirurgiche che permettono il trattamento di un largo ed eterogeneo numero di pazienti giustificano un ricorso sempre più frequente alla protesizzazione d’anca.
L’aumento del numero di interventi annui con tassi di crescita esponenziali induce la comunità scientifica a porsi con sempre maggior interesse nei confronti delle complicanze e della durata dell’impianto.
Il fallimento dell’impianto protesico e conseguentemente l’intervento di revisione di protesi si traducono infatti in un esperienza traumatica per il paziente, costosa per la società e difficile da affrontare per il chirurgo ortopedico.
La ricerca dell’osteointegrazione ed il perfezionamento delle protesi risulta essere il cardine chiave del successo e della durata dell’impianto protesico così come una strategia fondamentale per gli interventi di revisione di protesi totale di anca.
È così che attraverso lo studio dei materiale, del trattamento delle superfici protesiche e dei disegni delle protesi, l’ortopedia moderna cerca un perfezionamento dell’intervento.
Scopo della tesi è riportare l’esperienza dell’ortopedia e traumatologia universitaria I di pisa diretta dal prof. Michele Lisanti.
Lo studio condotto, che al momento della stesura della tesi è ancora in corso, si basa sul pensiero che l’introduzione di impianti da revisione costruiti in materiali dotati di superficie porosa rappresentino una attraente soluzione al fine di ottenere favorevoli risultati anche in presenza di importanti difetti ossei
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
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