1,720,958 research outputs found
AS1-247 TRABECULAR METAL FOR ACETABULAR DEFECTS IN HIP REVISION SURGERY. SHORT TERM CLINICAL AND RADIOGRAPHIC EVALUATION
No full textIntroduction/objectives: Trabecular Metal (TM) acetabular implants provide
a potential solution for dealing with significant acetabular bone loss in hip
revision surgery.
The aim of this study was to assess the early clinical and radiological outcome
of acetabular revision using TM cups and augments for acetabular reconstruction.
Methods: The study included 32 consecutive patients with failed acetabular
components after total hip arthroplasty. All patients underwent revision surgery
using a TM acetabular shell, whereas in 10 cases augments were associated
and 3 cases required cages.
All patients had conventional radiographs of the pelvis and the hip in both
preoperative and follow-up evaluations and were clinically evaluated according
to WOMAC and HHS scores at 1 month, at 6 months and then
at 1 year. Radiological evaluation investigated, with OsiriX v. 7.0, the restore
of hip centre of rotation (COR) and signs of radiolucent lines and
loosening.
All statistical analyses were performed using SPSS Version 14.0. Statistical
significance was set at p values of <0.05.
Results: Mean age at the time of surgery was 69.5 years. Median follow up
was 18 months (12-24 months).
At last follow-up, 21 patients showed excellent results according to the
WOMAC and HHS score and significant improvement (p<0.01), whereas 11
patients showed limitation in gait and function. COR was restored in 87% of
cases (p<0.01). The acetabular components and augments appeared osteointegrated,
and no sign of loosening were found.
Conclusions: Based on these early clinical and radiological results, TM
acetabular components and augments for acetabular defects (Paprosky
II and III) appear to be a promising solution reducing the need of bone
grafting. Our experience reflects early results reported in published
studies
Fratture recenti ed inveterate del collo del piede trattate con fissatore esterno assiale
No full textFresh and late fractures of the tibial pylon treated by dynamic axial fixator.
No full textAcute and late fracture of tibial pilon can be treated by means of external fixation. A new technique proposal. Rationale, indications, surgical technique, preliminary results
Clinical and X-ray evaluation using computed tomography in calcaneal fractures treated with external fixation (mini-DAF).
No full textA new proposal for surgical minimally invasive treatment of intra-articular displaced calcaneal fracture with an dedicated external fixator (mini-DAF). Rationale, technique, clinical results evaluated by CT scan, Literature review and experts' opinions
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
Valutazione clinica e radiologica nel follow-up delle fratture di calcagno trattate con mini-F.E.A.
No full textVariations 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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