1,720,959 research outputs found
Laser in periodontal pockets: in vivo and in vitro study
No full textThe aim of this study was to verify the sterilizing effectiveness of the laser in the treatment of the periodontal pockets in vivo, with the recording of clinicians' parameters and microbiological analysis, and in vitro with particular attention to the presence of specific bacterial stocks. During our study, in particular, it has been used the diodes laser. In order to estimate the effectiveness of the treatment of the periodontal pockets with laser, it has been examined the microbial content of the pockets carrying out withdrawals of the sulcular material before, immediately after and twenty minutes from the radiation. The microbiological results of the studies assert that, although substantial qualitative discrepancies between the several colonies of pathogen do not exist, quantitative differences are taken place with respect to the lessening of number and dimension of the present colonie
Health Status Perception and Psychological Sequelae in Buried Victims: An Observational Study on Survivors of the Earthquake in Amatrice (Italy), Three Years Later
No full textINTRODUCTION: The extrication from rubble is particularly critical for the survival of the victims of an earthquake. Early repeated infusion of sedative agents (SAs) in the acute trauma phase may interfere with neural processes leading to posttraumatic stress disorder (PTSD). STUDY OBJECTIVE: This study aimed to analyze the psychological status reported by the buried victims of the earthquake in Amatrice (August 24, 2016; Italy) by considering type of the SAs administered during the extrication maneuvers. METHODS: This was an observational study on data from 51 patients directly rescued under the rubble during the earthquake in Amatrice. During extrication maneuvers, a moderate sedation was administered by titrating ketamine (0.3-0.5mg/kg) or morphine (0.1-0.15mg/kg) with respect to the Richmond Agitation and Sedation Scale (RASS; between -2 and -3) in buried victims.Three years following the rescue, the survivors were interviewed on their perceived health status and stress using a questionnaire which consisted of 17 items: the standard four-item set of healthy days core questions (CDC HRQOL-4); the 12-item General Health Questionnaire (GHQ-12); and in addition, survivors were asked if they had a diagnosis for anxiety, depression, or for PTSD. RESULTS: The study analyzed data from the complete clinical documentation of 51 survivors; 30 were males and 21 females, with an average age of 52 years. Twenty-six (26) subjects were treated with ketamine, while 25 were treated with morphine, during the extrication procedures. Concerning the quality-of-life analysis, only 10 survivors out of 51 perceived their health status as good; the others reported psychological disorders. The GHQ-12 scores showed that all survivors had psychological distress with a mean total score of 22.2 (SD = 3.5). Eighteen (18) victims declared to have had a diagnosis of generalized anxiety (35%), while 29 were treated for depression (57%) and PTSD (57%) by a specialist. With regards to the perceived distress level and the anxiety disorder, this analysis showed significant associations with SAs used during extrication, with a better performance for ketamine than for morphine. CONCLUSION: These findings suggest investigating whether early sedation with ketamine directly in the disaster setting may promote the prophylaxis and reduce the risk of developing trauma-related disorders (TRDs) on the buried victims of major natural disasters in future studies
Mandibular fractures: repercussion on the atlanto-axial joint and acute cervical sprain
No full textObjective - Our previous research on facial dysmorphic pathology were able to show that maxillofacial asymmetries are associated with tridimensional modifications of the cranio-axial-cervical structures. These studies also showed that such cranio-cervical alterations, which can lead to arthropathies of the small vertebral articulations and scoliosis, may cause cervical pain syndromes.
Facial fractures result in an acute musculoskeletal asymmetry characterized by the spatial modification of the muscular vectors which causes a post-traumatic pathological and asymmetrical rearrangement of facial structures. Therefore we hypothesized that, as in asymmetrical dysmorphosis , in facial fractures the musculoskeletal displacement can also cause cranio-axial modifications that could expose patients to subsequent cervical clinical disorders.
Methods - 315 non consecutive cases of displaced mandibular fractures, 193 males (61.26%) and 122 females (38.74%), 18-36 years of age, treated from June 2006 to June 2012, were selected according to the following criteria: absence of direct cervical trauma, absence of preexisting cervical pathologies and facial asymmetric dysmorphosis. Single fractures amounted to 220 cases (69.84%), multiple fractures to 95 cases (30.16%). Results - In all cases CT showed a rotation of the atlas, ipsilateral to the side of single fractures, and the subluxation of the cranio-cervical joint (Kappa Coefficient = 1,000). Parasymphisis fractures showed greater joint dislocation than fractures of the angle and ramus (p = 0,0001). In bilateral fractures, joint displacement appeared in the side of greater muscular imbalance. Vertical derangement of the joint has been observed in 79.65% of single fractures and in 20.35% of multiple fractures (p = 0,0046). A Control Group made up of 20 patients, 10 males and 10 females, aged from 19-24 (mean-range: 21.6) suffering from acute isolated cervical sprain (whiplash) showed no spatial alterations of the atlanto-axial joint. Conclusions - Our research showed and delineated the physiopathology of cervical sprain in mandibular fractures. It appears that 16.19 % of all patients with displaced mandibular fractures showed cervical disorders at long-term follow-up ( p=0.0002)
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
Cervical injury related to mandibular fractures. A retrospective study of 315 cases
No full textObjective To define the association between mandibular fractures and alterations of the cranio-atlo-axial joint (CAAJ). Methods 315 cases of displaced mandibular fractures were retrospectively evaluated by CT scan and cervical X-ray for associated alterations of the CAAJ. Statistical analysis employed the chi-square and Cohen’s kappa coefficient. Results Single fractures amounted to 69.84% and multiple fractures to 30.16% of total fractures. CT scans showed a rotation of the atlas on the same side of single fractures and subluxation of the CAAJ. Vertical derangement of the joint was observed in 79.65% of single fractures and in 20.35% of multiple fractures. Approximately16.19% of all displaced mandibular fractures showed cervical disorders at long-term follow-up. Discussion The outcomes of this study revealed an association between traumatic mandibular fractures and CAAJ, accompanied by clinical disorders. These conditions require clinical attention due to their effects on long-term craniocervical functionality and future forensic issues
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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