1,721,056 research outputs found
Is the use of clear aligners a real critical change in oral health prevention and treatment?
Full text linkABSTRACT: The introduction, in the late years of the last century, of clear aligners therapy (CAT) has drastically changed the approach' perspective to orthodontic treatment. Both patients and clinicians' expectations appear to be addressed with clear aligner therapy achieving an aesthetic appearance and fewer side effects, mainly due to the difficult maintenance of proper oral hygiene in the conventional fixed approach. Research has partially confirmed these key points of CAT but similarly revealed several limitations to the overall benefit of this treatment. Both the aforementioned key points of the CAT are currently under discussion: the aesthetic appearance is not uniform, due to the presence in some cases of extensive need for attachments, and the better periodontal conditions are certainly present in the CAT but mainly limited to the short term. This critical review of the state of the art clarifies the gray areas, such as to inform the researcher with the aim of elaborating an adequate study design in order to evaluate the advantages and limitations of this orthodontic approach
The architect as a semantic agent in the dialogue between new practices and digital technologies
No full textIl contributo vuole offrire elementi di riflessione in merito alle nuove condizioni con cui il progettista è chiamato a confrontarsi alla luce delle trasfor- mazioni tecniche, culturali e cognitive che la diffusione delle ICT sta innescando nel settore delle costruzioni. La digitalizzazione, in particolare, ricollocherebbe il ruolo dell’architetto in una posizione di intermediazione tra nuove forme di intelligenza e nuove professionalità, definendo un ecosistema progettuale in cui l’efficacia dell’attività decisionale dipende sempre più dalle modalità di governo delle informazioni. In tale scenario, il progettista assolverebbe a compiti di coor- dinamento e “controllo di senso” di processualità complesse e automatizzate, che richiedono una comprensione ampia del fenomeno digitale
Genetics of dental agenesis: anterior and posterior area of the arch
No full textAIM: The aim of this study was to evaluate whether or not dental agenesis is regulated by genes and, in those cases under genetic control, if there were differences between incisors-canines and premolars-molars in the genetic transmission of agenesis. METHODS: This study was conducted on all patients who presented for a clinical evaluation in the Orthodontic Unit of the Department of Dentistry between 2001 and 2002. All patients were screened for dental agenesis. At the end of the selection process, 17 patients with dental agenesis, 6 to 20 years of age, were questioned about their family dental history for the purpose of constructing family trees and 15 family trees were constructed. The patients were questioned regarding any dental anomalies present. Panoramic radiographs, casts, and dental examinations were performed on the patients. For the patient's relatives, panoramic radiographs and oral histories were generally collected. RESULTS: The most often missing teeth were mandibular second premolars. On the basis of the family trees, the data allowed for the identification of two different groups: 1) 9 families had dental agenesis as a function of genetic transmission and 2) 6 families exhibited dental agenesis as a sporadic condition. In the former group of patients, agenesis primarily involved the maxillary lateral incisors. This appeared to be transmitted as an autosomal dominant characteristic, with variable expression and incomplete penetrance. In these families, both in individuals with and without agenesis, other anomalies were present, such as supernumerary teeth, microdontia, and anomalous teeth. In these cases, agenesis was one of the manifestations of an anomaly of the dental lamina, specifically mild dysplasia. In the latter group of patients, agenesis was a characteristic present only in orthodontic patients. In this group, agenesis most commonly involved the second molars and the second premolars. CONCLUSION: These findings indicate that agenesis of anterior teeth may depend on genes, while agenesis of posterior teeth is sporadic
Aetiology and prevalence of gummy smile : Eziopatogenesi e distribuzione nella popolazione del sorriso gengivale
No full textOptimal aesthetics is one of the objectives of an orthodontic treatment; failure to achieve it makes final result unacceptable. As facial aesthetics is largely determined by the relation between lips and teeth during smile, patients usually evaluate the success of treatment on the basis of that relation. In some people full smiling causes the exposition of a large gingival area underlying the upper lip. This condition, known as "gummy smile", is considered unpleasant by some Authors and potentially compromising for individual psychological development. According to orthodontic literature, gummy smile occurs more often in women and young people and it is related to skeletal and periodontal factors and the activity of facial muscles. Therefore the accurate diagnosis is essential to find what are the elements causing this clinical condition in order to improve dentofacial aesthetic
Clear aligners: between evolution and efficiency—a scoping review
Full text linkIn recent years, clear aligners have diversified and evolved in their primary characteristics (material, gingival margin design, attachments, divots, auxiliaries), increasing their indications and efficiency. We overviewed the brands of aligners used in Italy and reviewed the literature on the evolution of clear aligners based on their characteristics mentioned above by consulting the main scientific databases (PubMed, Scopus, Lilacs, Google Scholar, Cochrane Library). Inclusion and ex-clusion criteria were established. The data were collected on a purpose-made data collection form and analyzed descriptively. From the initial 580 records, 527 were excluded because they were not related to the subject of the review or because they did not meet the eligibility criteria. The remaining 31 studies were deemed comprehensive for the purpose of the review, although the “gingival margin design” feature and “auxiliaries” tool are not well represented in the more recent literature. Current knowledge on invisible aligners allows us to have a much clearer idea of the basic characteristics of aligner systems. There remains a need to deepen the use of systems other than In-visalignTM to give greater evidence to aligners that are very different based on the characteristics analyzed here and that are very widespread on the market
Building Industrialization and Prefabrication between Materiality and Immateriality
Full text linkThis paper aims to investigate the possibilities offered by the design and production paradigms of Industry 4.0 in the Architecture, Engineering & Construction industry, through the coordination between systems for the integrated management of the design process (Building Information Modeling) and rapid prototyping tools (Computer-Aided Manufacturing). Is hereby proposed an interpretation of the meaning that an industrial transformation of the AEC industry takes over for the Architectural design, simulating a methodology in a BIM environment for the design of residential buildings in Cold-Formed Steel with drywall envelopes, exploiting the potential of digital manufacturing and computational design advanced tools
PROSPETTIVE DI DIGITALIZZAZIONE E INIZIATIVE PER L’ADOZIONE DEL BIM IN GERMANIA/ DIGITALIZATION PERSPECTIVES AND MEASURES FOR THE ADOPTION OF BIM IN GERMANY
No full textAssociation between the temporomandibular joint disc position on magnetic resonance imaging and the mandibular deviation on posteroanterior cephalogram: a cross-sectional study in adolescents
Full text linkObjective. The aim of this cross-sectional research was to analyze the association between the disc position of the temporomandibular joint (TMJ) evaluated by magnetic resonance imaging (MRI) and the mandibular deviation evaluated by posteroanterior cephalometric (PA) in adolescents. Materials and Methods. The sample was 53 adolescents aged 11-18 years. This cross-sectional study was based on the analysis of PA and bilateral TMJ MRI images retrospectively selected. The mandibular deviation was evaluated by PA and defined by the amount of menton (Me) deviation from the midsagittal reference line. The temporomandibular disc position was evaluated by MRI: normal (N), disc displacement with reduction (DDR) and disc displacement without reduction (DDNR). The DDNR was considered more severe than the DDR. The patients were classified into three groups based on the bilateral disc position: group I, the same bilateral disc position; group II, disc displacement more severe on the ipsilateral side of the menton deviation; group III, disc displacement more severe on the contralateral side of the menton deviation. ANOVA followed by post hoc Tukey’s test was used to evaluate the interaction between the menton deviation and the bilateral disc position. Results. There was an association statistically significant between the bilateral disc position and the Me deviation (p<0.05). There were significant differences in the mean of the menton deviation between group II (4,40 ±2,26), and group I (2,17±1,93) and III (2,10±1,70). Conclusions. the menton deviation was significantly correlated with the disc position in the TMJ exhibit more deflection to the side more affected
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