1,720,970 research outputs found
Hypoglossal Nerve Palsy Misdiagnosed as Tongue Tumor: A Rare Case of Calcified Hypoglossal Schwannoma
No full textThe authors hereby present a case of a calcified schwannoma of the hypoglossal nerve, which led to hypoglossal nerve palsy initially misinterpreted as a tongue tumor. This paper reviews the presentation of schwannoma of the hypoglossal nerve and offers a novel perspective on this rare condition. Diagnostic pitfalls and the diagnostic-therapeutic value are also discussed
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
Pisa tower concept: a new paradigm in crooked nose treatment
Full text linkBackground: The primary element of a crooked nose is a midline deviation of the nasal pyramid. To date, no surgical strategies have been described as compatible with the philosophy of dorsal preservation. The dorsal preservation technique differs from the Joseph structured rhinoplasty because it preserves both the keystone area and the continuity of the cartilaginous vault. The authors focused on the versatility of the dorsal preservation technique even for the deviated nose, introducing the "Pisa Tower concept." Methods: From January of 2015 to June of 2019, 280 patients diagnosed as having a crooked nose underwent primary septorhinoplasty with dorsal preservation through an asymmetric bony wedge resection and lowering of the bony pyramid onto the frontal process of the maxilla (the let-down osteotomy), in accordance with the Pisa Tower concept. Inclusion criteria were a preoperative computed tomography examination, nasal axis deviation, a complete photographic examination preoperatively, and at least a 1-year follow-up. Results: The mean nasal axis deviation was 7.62 degrees preoperatively and 1.15 degrees postoperatively (p < 0.05). Of the 84 patients, 47 (55.95 percent) were very satisfied, 33 (39.28 percent) were satisfied, and four (4.76 percent) were unsatisfied with surgical results and required revision surgery. Conclusions: The authors' opinion is that the association of "swinging door" septoplasty with the Pisa Tower concept can be a valid alterative to other techniques when working with the structured rhinoplasty philosophy in patients with a crooked nose. Although this is only a preliminary study, the decreased use of spreaders graft and less aggressive reconstructive methods look very promising. CLINICAL QUESTION/LEVEL OF EVIDENCE: Therapeutic, IV
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
How to produce cheap and easy custom-made sterilizable filtering facepiece 2/3 masks for healthcare providers during pandemic COVID-19 emergency
Full text linkOn January 8, 2020, a novel coronavirus was officially announced as the causative pathogen of coronavirus disease (COVID-19) by the Chinese Center for Disease Control and Prevention.On February 26, COVID-19 has been recognized in 34 countries, with a total of 80,239 laboratory-confirmed patients and 2700 deaths.Protecting healthcare workers from infectious hazards is paramount to ensuring their safety in delivering health care.In addition, being able to protect healthcare workers, constituting the front-line response against high-threat respiratory pathogens, such as severe acute respiratory syndrome coronavirus 2, is important for reducing secondary transmission in healthcare-associated outbreaks.Authors present a simple, reliable, and cheap protocol to produce a custom-made sterilizable filtering facepiece 2/3 masks for healthcare providers during pandemic COVID-19 emergency
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
Assessment of maxillary canting on cone beam computed tomography and digital models: a retrospective study and proposal of a method
No full textObjectives. The mounting of the plaster casts on articulator procedure is routinely performed in orthognathic surgery to assess canting of the maxillary occlusal plane, but the currently used protocols and reference plane could be source of errors which affect reliability. Nowadays the assessment of canting of the maxillary occlusal plane could be also performed with an entirely digital protocol. Aim of the study was to propose a method to evaluate canting in patients affected by Unilateral Condylar Hyperplasia, comparing the measurements performed on digital models matched on CBCT with those made on traditional articulator. Materials and methods. A retrospective cross-sectional study was designed on 20 patients affected by vertical Unilateral Condylar Hyperplasia treated in the Units of Orthodontics and Maxillo-Facial Surgery. The canting of the maxillary occlusal plane was measured on plaster casts mounted on the conventional articulator and the measures were compared with those made on digital models matched on CBCT, according the protocol developed in our Unit. Molar, canine and basal difference were measured. To compare the two protocols and to test the agreement, we performed descriptive statistics, comparison between means and Bland Altman analysis. P value was set at 0.05. Results. Statistic comparison demonstrated agreement between measurements performed with the digital protocol and conventional physical method. Conclusion. Measurements of canting with digital protocol are comparable to the physical standard method. A total digital protocol allows faster availability and storage of patient's data and better communication between orthodontist and maxillo-facial surgeon, especially in patients affected by three-dimensional malocclusions
. Late treatment of orbital fractures: a new analysis for surgical planning
No full textIl trattamento chirurgico delle fratture orbitarie dovrebbe essere teoricamente effettuato il più precocemente possibile; in molti casi tuttavia l’intervento deve essere rimandato per qualche settimana o mese a causa delle condizioni generali del paziente. In questo ultimo caso è possibile che i frammenti fratturati si consolidino in posizioni errate causando deformità secondarie alla regione orbitaria con alterazioni funzionali ed estetiche. Un adeguato ed attento programma chirurgico delle deformità secondarie diventa quindi di fondamentale importanza per una perfetta riuscita del trattamento sia da un punto di vista di integrità delle strutture ossee che per quanto riguarda gli aspetti estetici. Nell’ultimo decennio si è sviluppato un numero sempre maggiore di software per la programmazione chirurgica. Sia tramite TC che tramite la nuova tecnologia Cone Beam è possibile ottenere file da poter utilizzare per scopi diagnostici, di previsualizzazione chirurgica o di chirurgia virtuale. In questo lavoro gli Autori propongono la loro metodica di programmazione pre-chirurgica nella correzione delle deformità secondarie alle fratture orbitarie. La valutazione e, di conseguenza, il trattamento di queste fratture deve essere basato non solo sulle strutture ossee ma anche, e soprattutto, sui tessuti molli della regione periorbitaria. È fondamentale quindi analizzare la posizione dell’orbita nello spazio in relazione alle strutture che la circondano ed alla regione controlaterale, se scevra da esiti traumatici o da malformazione pre-esistenti
Isolated sphenoid sinus mucocele: Etiology and management
No full textSphenoid isolated lesions are rare; they occur in 2% to 3% out of all paranasal sinus lesions. Diagnosis is based on the endoscopic examination and computed tomography scan or magnetic resonance imaging of the maxillofacial area. In this study, we present patients with sphenoid mucocele in the Maxillo-facial Surgery Department, University of Rome La Sapienza, treated with the endoscopic technique. Moreover, a literature review is per-formed, dealing with the evolution of approaches to the sphenoid sinus. From January 2001 to January 2007, we treated 75 patients affected by paranasal sinus mucocele. Out of this number, 8 patients (11%) presented an isolated localization in the sphenoid sinus. These patients were divided as follows: 5 involved the right sphenoid sinus and 3 involved the left sphenoid sinus. Isolated sphenoid sinus disease is a rare entity that can result in serious sequelae if diagnosis and treatment are inappropriately delayed. In our study, we highlighted how the endoscopic approach allows the removal of even large mucocele with the use of 45-degree angle optic and if it is possible to control and remove lateral walls of the sphenoid sinus. In our experience, we shifted from a traditional approach to the endoscopic approach. At the present time, the endoscopic approach represents the gold standard for sphenoid sinus mucocele treatment because it allows the best view of the sphenoid sinus and grants a better restoring of respiratory function and a higher compliance from the patient
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