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RECONSTRUCTION MORPHOSTRUCTURAL ANALYSIS OF FIBULA BONE OSTEOTOMIES WITH PIEZOSURGICAL DEVICE IN JAWS RECONSTRUCTION: A MIRROR OF A NEW FASTER PIEZOELECTRICAL OSTEOTOME
No full textBACKGROUND: Segmentation of vascularized bone flaps with piezoelectrical device is a valuable alternative to conventional cutting methods because it improves the intraoperative safety of the procedure. The time needed for completion of a single osteotomy with the piezoelectric device is longer than with the oscillating saw. However, the time normally needed to dissect and protect both the periosteum and the pedicle at each osteotomic site is greatly reduced. In 2015 a new piezoelectrical device suitable for highly mineralised bone and significantly efficient through all the cutting depth was engendered. Hardness and thickness of human fibula bone cortex may be fitting for this new piezoelectrical osteotome. AIM: We present and discuss the use a new generation of the piezoelectric bone-cutting device in microvascular free bone flap for the reconstruction of jawbone defects. The aim of this study was to evaluate on human fibula the time required for completion of each osteotomy comparing new piezoelectrical device and previous commercial device. A comprehensive study that evaluates and compares histomorphometry and histology of bone surfaces created with two piezosurgical devices is carried out.
MATERIALS AND METHOD: In 2016 seven consecutive patients underwent microsurgical reconstruction of the jaws. One specimen from each fibular bone diaphysis was harvested with the piezoelectric device and histologically evaluated.
CONCLUSIONS: The new generation piezoelettrical device halves the time needed for linear and wedge osteotomies on human fibula flap compared to tradizional piezoelectrical device. No significant histological and histomorphometrical differences are detected between bone surfaces osteotomized with both devices
Foreign body mimicking an oral pathology
No full textForeign bodies’ adherence to the hard palate is unusual and can mimic an oral pathology. The diagnosis of this foreign body is challenging: it is based on an amnestic history, unspecific or absent symptoms and oral examination. The oral examination could be difficult when dealing with paediatric patients. Imaging techniques may mislead and so an exam under anaesthesia is often necessary to make the proper diagnosis. We report a case of 2 years-old male child referred to our attention for a strange lesion on the hard palate. After poorly significant MRI, we were unable to perform an oral examination and a general anaesthesia procedure was performed. A small translucent mass that turned out to be a piece of plastic adherent to the hard palate, was removed
Orbital approaches for primary and secondary tumours
No full textBackground: Orbital tumours are uncommon and represent approximately only 3.5 - 4 % of ophthalmic disease. Most published articles report case report, comparative studies with small numbers of patients or non-comparative studies with limited statistical power to provide clear treatment and reconstructive recommendations.
Purpose: This paper reports our experience in treating orbital tumours. In particular, we analyzed both epidemiology, histology, methods of treatment and follow up. Particular emphasis is laid on the complications and aesthetic results of the different surgical approaches.
Method: A retrospective study was carried out of 152 patients with orbital masses treated at Head and Neck Surgery Department of the University Hospital of Modena between January 2001 and the end of March 2016. The follow-up period begins in 2001 and finish by the 31th of March 2015. The survival has been calculated according to Kaplan-Meyer method (using IBM SPSS Statistics 20).
Discussion: The median survival was ninety-six months. The cumulative survival at 12 months was 88 %; it came to 78 % in 24 months. The cumulative survival at 5 aa (60 months ) was 77 %.
The lowest survival was showed in patients treated with an extensive osteotomy or exenteration. This result, however, could not be linked to the surgical approach but it could be due to the poor prognosis of the more advanced tumours and to the intracranial lesions involvement. Patients undergoing extensive osteotomies presented the greatest number of complications : 25 % complained of diplopia , 10% a decrease of visual acuity and 15 % had lagophthalmos , in two cases with epiphora .
Conclusion: Preserving the contents of the orbital cavity and function is often possible after radical excision. However, conservative purposes have not to impair the oncologic efficacy
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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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