1,720,962 research outputs found
Analisi anatomofunzionale dell’overbite e dell’overjet
No full textLa funzione masticatoria è influenzata dall'orientamento del piano occlusale, dalle guide occlusali, dall'overjet e dall'overbite.
Generalmente l'overjet e l'overbite sono utilizzati per definire il valore funzionale dell'occlusione.
Questo studio associa una valutazione mediante registrazione dei cicli masticatori nel piano sagittale e un esame di immagini TCs dell'occlusione in 15 pazienti aventi una stessa ampiezza di overbite (2 mm) e una stessa ampiezza di overjet (2 mm) a livello degli elementi frontali.
Dai risultati ottenuti si evince che i soggetti presentano cicli masticatori vari e angoli fra la superficie palatina degli incisivi superiori e quella vestibolare degli antgonisti di valore compreso tra 12° e 54°.
Ciò dimostra che la guida occlusale non è dipendente dall'ampiezza dell'overjet e dell'overbite ma correlato al valore dell'angolo intercondilare chiamato angolo di overjet immediato (IOA
Temporomandibular joint kinetics and chewing cycles in healthy children. a 6-year follow-up
No full textMost of the studies of temporomandibular kinetics and signs and symptoms of temporomandibular dysfunction are conducted on adults and not on children. In many areas the paediatric literature in scarce and sometimes extrapolated from adult studies.
There has been a growing interest in treating Temporomandibular Disorders (TMD) in children in recent years, and also in recognizing the signs and symptoms at an early age in order to prevent possible derangements and cranio-mandibular dysfunction in adulthood. The conference regarding TMD in paediatric patients, jointly supported by the American Academy of Pedodontics and the University of Texas Health Science Center, held in Austin (Texas) in September 1989, concluded that the precise number of children suffering from TMD was unknown.
Dr Okeson, at the meeting of the College of Diplomates of the American Board of Pedodontics held in May 1989, stated that the signs and symptoms were commonplace in the young. This contradiction, nevertheless, allowed the conclusion to be made by both groups that very few children, probably less than 5%, need treatment.
According to Widmalm and Gunn, few subjects with oral parafunctions below the age of 7 years, have been reported. They inferred that little was known about the association between oral parafunction and TMD-related oral/facial pain symptoms. Oral parafunctions are, however, still considered as significant factors in the aetiology of temporomandibular joint (TMJ) disorders. Their prevalence in school children as well as in adults has been reported.
More information is needed with regard to lower age groups. In order to state what is pathologic we need to know the range of normal values of the temporomandibular kinetics and function in paediatric age groups.
The aim of the present study was to find standards for mandibular kinetic evaluation in paediatric patients. We followed a group of children from the age of 5 to 8 years, during the mixed dentition period. The selected children had no systemic pathologies or carious cavities
Clinical and radiological study of temporomandibular osteonecrosis in 50 patients
No full textObjectives: to present a comparative study of the clinical and radiological TMJ signs in 50 patients with associated internal disorders-condylar osteonecrosis (20.4-61.2 years; mean age 44.7 years; sex ratio M/F=1/25) versus 226 patients with TMJ internal disorders not osteonecrosis-associated (10.8-81.1 years; mean age 36.4 years; sex ratio M/F 1⁄4).
Experimental methods: Clinical study was based on pain (Visual Analogic Scale, VAS) and occlusal analisis. TMJ disorders were evidenced using Magnetic Resonance Imaging (MRI) (Magnetom Symphony; Siemens, Erlanger; 1.5 Tesla).
Results: TMJ osteonecrosis resulted unilateral or bilateral, more frequently in female (96 %) than in male (4%) and also evidenced in young adults. High pain intensity (VAS=8) was correlated with MRI images of osteonecrosis in acute phase. Disc displacement without reduction resulted statistically more frequently (p<0.05) in the ipsilateral and contralateral TMJ-osteonecrosis associated than in TMJ without osteonecrosis.
Conclusions: Clinical signs of TMJ osteonecrosis resulted not specifically and indicate MRI images as necessary
Studio RM dell’iperemia della zona bilaminare dell’articolazione temporo-mandibolare in pazienti temporo mandibular disorders: dati preliminari
No full textLo studio RM dell’ATM è basato sulla valutazione di immagini assiali, coronali e sagittali degli internal derangements (ID): anomalie di sviluppo, dislocazioni discali, patologie degenerative, versamento endoarticolare.
Lo scopo di questo studio è la valutazione dell’iperemia della zona bilaminare (ZB) in pazienti con patologie ATM e diagnosi RM di internal derangements.
I dati preliminari ottenuti da questo studio comparativo delle immagini RM di pazienti con disordini temporo-mandibolari (TMD) con ID associati ad iperemia della zona bilaminare (ZB) e soggetti del gruppo controllo con ID senza associazione di iperemia della ZB dimostrano una predominanza significativa di iperemia in articolazioni con anormale angolazione condilare. Di conseguenza, poiché la zona bilaminare è una componente funzionale dell’ATM, la sua valutazione deve essere integrata nello studio RM dell’ATM
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
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