1,720,959 research outputs found
Cervical lordosis angle measured on lateral cephalograms; findings in skeletal class II female subjects with and without TMD: a cross sectional study
No full textThe literature reports evidence of various types of correlations between cervical alterations
and cervical pain, and the existence of cervical pain in subjects with temporomandibular joint internal
derangement (TMD). The hypothesis of this study is that cervical lordosis angle (CVT/EVT angle) alteration
on cephalometrics could be correlated to the presence of TMD. The cephalometric records of 50
females with documented TMD were compared with those of a control group of 50 females. The subjects
in the sample were 25-35 years of age, average 28.9 years (SD, 3.2). Radiographs were taken in
mirror position, and seventeen variables, including the CVT/EVT angle, were traced. Double measurements
were made to evaluate method error using Dahlberg’s formula. Pearson’s correlation coefficient
and Mann-Whitney’s t-test were used to evaluate the data. Intra-group analysis showed significant correlations
between the CVT/EVT angle and mandibular length (p<0.01), mandibular position (p<0.05),
mandibular divergence (p<0.01), and overjet (p<0.01) in both groups. Between groups, the analysis
showed significant differences in CVT/EVT angle (p<0.05), maxillary protrusion (p<0.01), mandibular
protrusion (p<0.01), mandibular length (p<0.01), mandibular divergence (p<0.05), and overbite
(p<0.05)
Prevalence and distribution by gender of occlusal characteristics in a sample of Italian secondary school students: a cross-sectional study
No full textThe aim of this study was to describe the prevalence and distribution, by gender, of occlusal
traits in a sample of Italian students aged 11–14 years (mean 13 ± 1 years). Using standardized and
validated recording criteria, a single operator measured the overjet, overbite, open bite, anterior and
posterior crossbites, crowding, coincidence of the upper and lower midlines, and diastema, in 810
secondary school students (53.6 per cent males). Chi-square, t-test statistics, and odds ratios (ORs)
with 95 per cent confi dence intervals (CI) were used to investigate the relationship between gender and
malocclusion characteristic. Logistic regression was used to further analyse the independent association
between gender and each outcome measure.
Ninety-three per cent of the subjects showed at least one occlusal trait, with one or two anomalies
recorded in 63 per cent of children. The prevalence of occlusal traits ranged from 1.1 (negative overjet)
to 54 per cent (upper and lower midlines not coincident). Males were more likely than females to show
both an increased overbite and an increased overjet, although the latter result was not confi rmed by
logistic regression (P = 0.05). Multivariate analysis showed a negative association between overbite and
misalignment of the lower incisors and lack of coincidence of the upper and lower midlines, whereas
subjects with an increased overbite were more likely to have an increased overjet (all P < 0.01). Further
studies are required in order to further clarify these fi ndings and to provide accurate estimates of the
orthodontic treatment need in Italian adolescents
Immediate effects of plantar inputs on the upper half muscles and upright posture: a preliminary study
No full textThis purpose of this study was to investigate the immediate effects of plantar inputs on both the upper half muscle activity (anterior temporal, masseter, digastric, sternocleidomastoid, upper and lower trapezius, cervical) and the body posture, by means of electromyography (EMG) and vertical force platform, respectively. Twenty four (24) healthy adults, between the ages of 24 and 31 years (25.3 +/- 1.9), with no history of craniomandibular disorder or systemic musculoskeletal dysfunction, were randomly divided into two groups: test group (fourteen subjects) and control group (ten subjects). A first recording session (TO) measured the baseline EMG and postural patterns of both groups. After this session, the test group wore test shoes with insoles that stimulated the plantar surfaces, while the control group wore placebo shoes. After one hour, a second set of measurements (T1) were performed. Significant differences between the groups at baseline were observed in the left anterior temporal, left cervical, and left upper trapezius, as well as at T1 in the left anterior temporal and right upper trapezius (p < 0.05). Within-test group analysis showed a significant increase of the right upper trapezius activity (p < 0.05), whereas no changes were found by within-control group analysis. Lower risk of asymmetric muscle patterns and postural blindness in the test group compared to the control group was observed. Further studies are warranted to investigate the short and long-term effects of this type of insole, in patients with both craniomandibular-cervical and lower extremity disorders
New Technique for Mandibular Symphyseal Distraction by a Double-Level Anchorage and Fixation System: Advantages and Results
No full text
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
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
- …
