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Introduction: In a saturated market with an over-supply of undergraduate and graduate programs, social media have become attractive means of advertising in Dentistry. However, posts frequently contain ethical violations and lead to service commodification, and their contents are often in disagreement with the Code of Consumer Protection. Objective: This article, which focuses on ethical and legal developments, contributes to the discussion and elucidation of questions associated with advertising that uses clinical images and photographs of patients in social media for commercial purposes and self-promotion. Conclusion: Social media and networks are valuable tools of dissemination and exchange of information because of their flexibility, democratic character and low cost. However, their abusive or misleading use, as well as the ethical and legal violations associated with the difficulty in controlling their use, may lead to serious damages and unfavorable court decisions.

ResumoIntrodução: A prevalência e a distribuição das anomalias dentárias de número variam de acordo com a população estudada. Objetivo: Determinar a prevalência de anomalias dentárias de número, verificando-se a frequência com relação a gênero, localização e dentes mais acometidos. Método: Foram avaliadas 1.054 radiografias panorâmicas de pacientes com idade entre 5 e 30 anos, realizadas no período de janeiro a março de 2010, em uma clínica particular de diagnóstico por imagem de Teresina-PI. Foram registrados dados relativos a gênero, idade, presença ou ausência de anomalia, dente acometido e localização. Foram realizados os testes estatísticos Qui-quadrado de Pearson e Teste Binominal, para duas proporções. Resultado: A hipodontia, com prevalência de 4,9%, foi encontrada com mais frequência na maxila, não apresentando diferença entre os lados e os gêneros. Os dentes mais ausentes foram: incisivos laterais superiores e segundo pré-molar inferior. Em relação à hiperdontia, com prevalência de 4,0%, não foram observadas diferenças entre gêneros, lados e maxilares. As regiões com maior presença de supranumerários foram: distal dos terceiros molares e entre pré-molares inferiores. Conclusão: Foi observada prevalência de hipodontia de 4,9%, sendo mais comum na maxila, e de hiperdontia de 4%, não apresentando diferença entre maxilares, lados e gêneros.Descritores: Prevalência; anodontia; dente supranumerário. AbstractIntroduction: The prevalence and distribution of dental anomalies of number vary according to the population studied. Objective: To determine the prevalence of dental anomalies of number by assessing the frequency of hypodontia and hyperdontia regarding gender, the region of the maxila or mandible and the most affected teeth. Method: The panoramic radiographs of 1054 patients, aged 5 to 30 years, from a private diagnostic imaging clinic were evaluated. Gender, age, presence or absence of abnormality, affected teeth and region were compared. Chi-square statistical tests and Pearson Test Binominal for two proportions were carried out. Result: The prevalence of hypodontia was 4.9% and it was more frequent in the maxilla. There were no significant differences between the left and right side of the maxila or genders. The most frequently missing teeth were the maxillary lateral incisors and mandibular second premolar. The prevalence of hyperdontia was 4.0%. There were no significant differences between genders, right or left side of the maxila or mandible. The regions most frequently affected were distal to the third molars and between mandibular premolars. Conclusion: The prevalence of hypodontia was 4.9% and it was more frequent in the maxilla. The prevalence of hyperdontia was 4%. No significant differences between genders and the maxillary or mandibular region were found.

An interceptive orthodontia allows the correction of the anterior crossbite early, in order to promote or harmonious growth of the osseous bases. There are alternatives for the treatment of the cross bite prior to the use of the removed devices as a modified progeny. The objective of this work is to carry out or the report of a clinical case of anterior crossbite treated with this approach. Patient with nine years of age, feminine sex and in the phase of dentição mista. No clinical examination observed a diminution of the zygomatic projection and maxillary deficiency. A cephalometric analysis verified a negative maxillo-mandibular relationship, due to the tendency of vertical growth and lower incisors to be positioned. After making the dress, you are ready to install and stay after seven days, using a protocol for maintenance once a week for three weeks. Or the modified progeny has been shown to be effective without treatment of the anterior crossbite in a three-week period, enabling or derailing the maxilla for a more harmonious growth of bone bases. Or use of the fast and effective modified progeny device without dentoalveolar anterior crossbite interceptor treatment. It will be necessary to preserve the case, supervising or developing the occlusion and growth of the bone bases.