Improving facial esthetics using miniscrews: a case report

The number of patients seeking treatment to improve their facial attractiveness is increasing. Nowadays orthodontic patients are requiring solutions to problems such as a minor gummy smile, a protruded lip, a posterior rotated mandible or even an open naso-labial angle. These problems are rarely all combined in one case, as biprotrusive lips are opposed to an open naso-labial angle, and solving one problem could aggravate the other. In this case report we describe the treatment of a hyperdivergent pattern patient resulting in a posterior positioning of the mandible with lack of chin. The patient had also a dental biprotrusion creating protruded lips combined to an open naso-labial angle and a minor gummy smile. The treatment consisted in correcting the protruded lips with concern not to widen the naso-labial angle. The vertical control for the anterior chin rotation and the gummy smile correction were done using miniscrews

Unsupervised video indexing on audiovisual characterization of persons

Cette thèse consiste à proposer une méthode de caractérisation non-supervisée des intervenants dans les documents audiovisuels, en exploitant des données liées à leur apparence physique et à leur voix. De manière générale, les méthodes d'identification automatique, que ce soit en vidéo ou en audio, nécessitent une quantité importante de connaissances a priori sur le contenu. Dans ce travail, le but est d'étudier les deux modes de façon corrélée et d'exploiter leur propriété respective de manière collaborative et robuste, afin de produire un résultat fiable aussi indépendant que possible de toute connaissance a priori. Plus particulièrement, nous avons étudié les caractéristiques du flux audio et nous avons proposé plusieurs méthodes pour la segmentation et le regroupement en locuteurs que nous avons évaluées dans le cadre d'une campagne d'évaluation. Ensuite, nous avons mené une étude approfondie sur les descripteurs visuels (visage, costume) qui nous ont servis à proposer de nouvelles approches pour la détection, le suivi et le regroupement des personnes. Enfin, le travail s'est focalisé sur la fusion des données audio et vidéo en proposant une approche basée sur le calcul d'une matrice de cooccurrence qui nous a permis d'établir une association entre l'index audio et l'index vidéo et d'effectuer leur correction. Nous pouvons ainsi produire un modèle audiovisuel dynamique des intervenants.This thesis consists to propose a method for an unsupervised characterization of persons within audiovisual documents, by exploring the data related for their physical appearance and their voice. From a general manner, the automatic recognition methods, either in video or audio, need a huge amount of a priori knowledge about their content. In this work, the goal is to study the two modes in a correlated way and to explore their properties in a collaborative and robust way, in order to produce a reliable result as independent as possible from any a priori knowledge. More particularly, we have studied the characteristics of the audio stream and we have proposed many methods for speaker segmentation and clustering and that we have evaluated in a french competition. Then, we have carried a deep study on visual descriptors (face, clothing) that helped us to propose novel approches for detecting, tracking, and clustering of people within the document. Finally, the work was focused on the audiovisual fusion by proposing a method based on computing the cooccurrence matrix that allowed us to establish an association between audio and video indexes, and to correct them. That will enable us to produce a dynamic audiovisual model for each speaker

FACTORS INFLUENCING THE DECISION TO INITIATE ORTHODONTIC TREATMENT AND THE CHOICE OF APPLIANCE TYPE IN A LEBANESE SAMPLE DURING THE COVID-19 PANDEMIC AND THE ECONOMIC CRISIS. A CROSS-SECTIONAL STUDY.

Background: The spread of Coronavirus Disease 2019 (COVID-19) has led to a major public health issue. This study aimed to assess the factors that influence the Lebanese people in undergoing an orthodontic treatment after the outbreak of COVID-19, as well as the factors that influence their choice of orthodontic appliance type. Methods: 489 Lebanese participants (199 men and 290 women) were invited to fill a questionnaire developed on Google Forms. Eligible participants were simply Lebanese people including those who immigrated during the crisis. Dentists, dental students and foreigners were excluded from the study. The link for the questionnaire was sent to the patients via WhatsApp. It is a brief, structured 10-item questionnaire that assesses the relationship between the economic recession and the COVID-19 pandemic and the Lebanese participants’ decision to initiate orthodontic treatment and their choice of appliance type. Results: A total of 489 responses were obtained: 199 men (41%), 290 women (59%) with a mean age of 24 years ±8.4 years (age range: 13 to 64 years). Half of the participants feel anxious in consulting for an orthodontic opinion during the pandemic. Almost half of the respondents are thinking of starting orthodontic treatment after the start of COVID-19. The responses showed that most participants (71%) believe that the current economic crisis in Lebanon influences their decision to start an orthodontic treatment. Regarding the choice of the type of orthodontic appliance, a higher number of respondents choose metal braces (traditional) than other appliances. In a normal situation, the aesthetic of the appliance is the most important factor in choosing the appliance. Conclusion: The COVID-19 pandemic and the current economic crises in Lebanon had a negative impact on the financial and emotional well-being of the Lebanese people, on their decision to initiate an orthodontic treatment as well as on choosing the type of the appliance. However, despite the difficult circumstances facing the country, a big part of the respondents was not discouraged from initiating treatment

The placement experience of Western Sydney University social work students with physical disabilities

To obtain a social work degree in Australia, students must complete 1000 hours of placement. Students with physical disabilities however face barriers on placement but little literature exists on this or how placement affects students’ professional social work development. This phenomenological study investigated the placement experience of Western Sydney University social work students with physical disabilities. An online survey, semi-structured interviews and the theoretical framework of the socio-political model of disability, helped find that participants encountered inaccessible placement environments, negative assumptions about their needs and capabilities and a reluctance to implement reasonable adjustments, which reduced their practice confidence and sense of professional identity. Through placement, participants also reported an increased skill set, more resilience and a greater interest in different social work practice areas. These findings generate new understandings in this under-researched area, to inform placement agency practices on promoting disability inclusion and helping students become confident social workers

Influence of the vertical position of maxillary lateral incisors on the perception of smile esthetics among dentists, orthodontists and laypersons: A computerized simulated photographic assessment

The aim of this study was to evaluate the impact of the vertical position of the maxillary lateral incisors borders on the perception of smile esthetics of a woman and a man, with respect to the resulting changes of the gingival margin, in order to determine the most esthetics position of the lateral incisors. Pictures of two smiles of different sexes were edited using Adobe Photoshop (Version CS5; Adobe Systems, San Jose, Calif). The vertical position of the lateral incisors was modified, while keeping the same crown length and height/width ratio, thus respecting the resulting changes of the gingival levels. 210 evaluators (70 dentists, 70 orthodontists and 70 laypersons) aged between 18 and 60 years old were asked to grade the pictures with a scale from 0 to 10, with zero as the most unattractive and 10 as the most attractive.180 evaluators responded to the survey. Orthodontists are the most sensitive to changes in the level of the maxillary lateral incisors. The most attractive vertical relationship between the lateral and the central incisors was the 1.0 mm step. The laypersons were not able to find any statistical difference between the lateral incisors levels for both sexes. Particularly, this group gave a significantly higher score to the 0 mm step in comparison with the scores given by the orthodontists and dentists to the same picture. The perception of smile esthetics was identical between men and women. Flat smiles with central and lateral incisors borders at the same level are more appreciated by laypeople, and more accepted for men

Novel Order preserving encryption Scheme for Wireless Sensor Networks

International audienceAn Order-Preserving Encryption (OPE) scheme is a deterministic cipher scheme, whose encryption algorithm produces cipher texts that preserve the numerical ordering of the plain-texts. It is based on strictly increasing functions. It is a kind of homomorphic encryption where the homomorphic operation is order comparison. This means that comparing encrypted data provides the exact result than comparing the original data. It is attractive to be used in databases, especially in cloud ones as a method to enhance security, since it allows applications to perform order queries over encrypted data efficiently (without the need of decrypting the data). Wireless sensor network is another potential domain in which order preserving encryption can be adopted and used with high impact. It can be integrated with secure data aggregation protocols that use comparison operations to aggregate data (MAX, MIN, etc.) in a way that no decryption is being performed on the sensor nodes, which means directly less power consumption. In this paper, we will review many existing order-preserving encryption schemes with their related brief explanation, efficiency level, and security. Then, and based on the comparative table generated, we will propose a novel order-preserving encryption scheme that has a good efficiency level and less complexity, in order to be used in a wireless sensor network with an enhanced level of security

Test Targets 10: A Collaborative effort exploring the use of scientific methods for color imaging and process control

Th ere are six papers that were written, peer reviewed, and published in Test Targets 10. Two papers focus on printing standardization and conformity assessment. Chung describes aims and tolerances specified in ISO 12647-2 and the use of color measurement and data analysis for conformity assessment. Urbain and Khoury describe data reception requirements in ISO 12647-2 and ISO 15930 and the use of a test pdf file to assess conformity of any pdf workflow. Test Targets 10 will likely be remembered as the publication that covers OBA (optical brightening agents). Two papers focus on OBA. Tian and Chung report the effect of paper containing OBA on printed colors and how such effect can be corrected using different mathematics. Sigg and Millward report the stability of OBA as a function of exposure to light over time. In addition, Gallery of Visual Interest shows side-by-side the visual effect of pictorial and synthetic color images printed on paper with and without OBA. Printing conformity is result-oriented and does not dictate the press calibration method used. The fifth paper, authored by Wang, compares the compatibility of two press calibration methods, TVI and G7, by means of gradation compensation and press run simulation. Printing conformity requires that correct inks and paper be used. Verifying that correct inks are used is outside the capability of a printer. Th e sixth paper, authored by Zhang, explores an alternative ink drawdown and ink verification method that could be implemented by printers. Test Forms is a regular feature of Test Targets. We are pleased to showcase pictorial color reference images, Roman 16 Reference Images, courtesy of Bundesverband Druck und Medien e.V. (bvdm), and many possible uses of these images for printing process control and for color management studies. For example, we can compare the appearance of an image printed from the supplied CMYK file with the image from a supplied RGB file that was converted to CMYK by a color management application