The in situ model tested was found to be effective in evaluating the accumulation and development of biofilm on orthodontic brackets. In the quantitative analysis, composite brackets showed greater biofilm adhesion values while metallic and ceramic presented similar biofilm absorbance spectrum.

Autologous bone remains the gold standard grafting substrate for bone fusions used for small gaps and critical defects. However, significant morbidity is associated with the harvesting of autologous bone grafts and, for that reason, alternative bone graft substitutes have been developed. In the present case series, a glass-reinforced hydroxyapatite synthetic bone substitute, with osteoinductive and osteoconductive proprieties, was applied. This synthetic bone substitute comprises the incorporation of P2O5-CaO glass-based system within a hydroxyapatite matrix, moulded into spherical pellets with 250-500 μm of diameter. A total of 14 veterinary clinical cases of appendicular bone defects and maxillary / mandibular bone defects are described. In all clinical cases, the synthetic bone substitute was used to fill bone defects, enhancing bone regeneration and complementing the recommended surgical techniques. Results demonstrated that it is an appropriate synthetic bone graft available to be used in veterinary patients. It functioned as a space filler in association with standard orthopaedic and odontological procedures of stabilization, promoting a faster bone fusion without any local or systemic adverse reactions. This procedure improves the animals’ quality of life, decreasing pain and post-operative recovery period, as well as increasing bone stability improving positive clinical outcomes.

How to cite this article: Brandão GAM, Simas RM, Almeida LM, Silva JM, Meneghim MC, Pereira AC, Almeida HA, Brandão AMM. Evaluation of ionic degradation and slot corrosion of metallic brackets by the action of different dentifrices. Dental Press J Orthod. 2013 Jan-Feb;18(1):86-93. » The authors report no commercial, proprietary or financial interest in the products or companies described in this article. Objective: To evaluate the in vitro ionic degradation and slot base corrosion of metallic brackets subjected to brushing with dentifrices, through analysis of chemical composition by Energy Dispersive Spectroscopy (EDS) and qualitative analysis by Scanning Electron Microscopy (SEM).Methods: Thirty eight brackets were selected and randomly divided into four experimental groups (n = 7). Two groups (n = 5) worked as positive and negative controls. Simulated orthodontic braces were assembled using 0.019 x 0.025-in stainless steel wires and elastomeric rings. The groups were divided according to surface treatment: G1 (Máxima Proteção Anticáries introduction Deterioration and corrosion of orthodontic appliances is a concern for orthodontists in their clinical practice. This attention is focused in two main questions: If the corrosion by products, whether they are produced, are absorbed by the organism and can cause local or systematic effects; and which effects the corrosion has on the physical properties and clinical performance of orthodontic appliances. There are evidences that support the deleterious effects of the buccal environment on structural alterations of metallic biomaterials.23 Eliades et al 6,7 tested orthodontic materials and did not find ion release by nickel-titanium alloys, but observed levels of nickel and chromium released by stainless steel alloys. No material was mentioned as cytotoxic, probably due low quantity of released ions or for the way they link.The several appliances (brackets, arch wires, etc.) used during orthodontic treatment to obtain the dental movement are composed of materials with distinct physical integrity, structural compositions and mechanical properties. Their requirements are complex for they are put under many stresses in the oral environment. This includes immersion in saliva and ingested liquids, temperature variation, mastication efforts and the loading submitted to the appliances. The combination of these materials and hostile conditions provided by the environment can result in corrosion, ion release and deterioration of these appliances. The interactions that these corrosion by products can have on the manifestation of local or systematic problems in the individual's health is not well corroborated and comprehended in literature, 3,4,11 despite numerous case reports of hypersensitivity to nickel 13,21 and alterations on the ionic concentration of body fluids.

RESUMOA políticas de saúde bucal prévias à implantação do Sistema Único de Saúde (SUS) eram consideradas excludentes e direcionadas para práticas curativas, onde os indicadores mostravam pouca contribuição na melhoria da saúde bucal. A instituição do SUS possibilitou o direcionamento da saúde pública brasileira para ações preventivas, humanizadas e integradas. O objetivo deste estudo foi analisar o perfil do estudante de Odontologia da Universidade Federal do Pará (UFPA) conforme os interesses profissionais e a atuação no SUS. Foi utilizada uma abordagem indutiva, com procedimento estatístico-comparativo e técnica de observação direta extensiva por meio de questionário. A partir do universo amostral de 478 alunos matriculados do 1º ao 10º semestre, extraiu-se uma amostra de 240 alunos (nível de confiança de 95%). Constatou-se que para 93,8% dos alunos, a construção do SUS é dependente da união dos usuários, governo e profissionais interessados na oferta de melhores serviços. Os mesmos afirmam que a formação em Odontologia na UFPA é direcionada para o trabalho no SUS e que a formação em ciências humanas é importante para o exercício profissional. As disciplinas abordadas e atividades práticas desenvolvidas foram consideradas insuficientes para o exercício profissional.Descritores: Educação em Odontologia. Formação de Recursos Humanos. Sistema Único de Saúde.

New paradigms of Brazilian dental education involve orthodontics in the context of generalist professional formation, encouraging the recognition of teaching reality of this discipline in undergraduate courses in dentistry. This article discusses the orthodontics discipline in Brazilian dentistry undergraduate courses to identify the number of semesters offered, nomenclature, insertion model, content format and the performance of clinical practice in undergraduate education and its association with characterization variables of the discipline. Electronic questionnaires were sent to 203 dental schools, 55 public and 148 private, registered to the Federal Council of Dentistry in 2013. The questionnaires were answered by 92 teachers of orthodontics, representing 45.3% of the existing dental undergraduate courses in Brazil: 55.4% of which from private and 44.6% public schools. The findings of this research show that orthodontics teaching is present in all undergraduate courses analyzed, is a predominant and integrated subject in pediatric dentistry, addresses the contents in theoretical and practical form both in the laboratory and clinic, and assists children with deciduous and mixed dentition for diagnosis, prevention and interception of malocclusions. Egressed students are able to recognize orthodontic problems and direct these young patients to treatment. The presence of clinical practice was associated with the variables that denote greater investments of higher education institutions in professors, academic credentials and curricular matrix due to the integrality of the contents and course load distribution for the discipline.