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Resumo A mordida cruzada anterior é uma má oclusão frequentemente observada nas dentições decídua e mista, pode ser classificada em dentária, esquelética ou funcional. Esta última, quando interceptada de forma precoce, pode apresentar um prognóstico satisfatório. Nesse contexto, a confecção de pistas diretas Planas têm se mostrado uma alternativa eficiente, quando poucos elementos dentários são envolvidos. Este trabalho apresenta o caso clínico de um paciente de 6 anos de idade, portador de mordida cruzada anterior unilateral do tipo funcional, cujo diagnóstico diferencial e intervenção precoce permitiram a resolução do caso. Ao manipular a mandíbula, levando os côndilos em relação cêntrica (RC), notou-se a presença de interferência oclusal entre os caninos decíduos superior e inferior do lado direito, que são as causas da anteriorização da mandíbula, com oclusão em MIH. Para correção, utilizou-se terapia de pista direta Planas confeccionada sob canino superior direito em resina composta e leve desgaste no canino inferior do lado direito. Os contatos prematuros foram removidos, criando um plano inclinado de aproximadamente 45 graus na face palatina do canino superior e um leve ajuste oclusal na face incisal do canino inferior do lado direito. O uso dessa técnica permitiu a correção da mordida cruzada anterior funcional imediatamente após a remoção da interferência oclusal. O caso relatado demonstra que o tratamento precoce de mordidas cruzadas propicia maiores chances de sucesso na reabilitação do sistema estomatognático. A utilização de pistas diretas Planas demonstrou ser uma alternativa eficaz, de baixo custo e de fácil execução para tratamento de mordidas cruzadas funcionais. (AU)

Abstract Anterior crossbite is a malocclusion frequently found in deciduous and mixed dentitions, it can be classified as dental, skeletal or functional. This last one has a favorable prognosis when the treatment occurs in early stages. Considering this, Planas direct tracks have been showing to be an effective and less invasive alternative when few dental elements are involved. This paper presents a clinical case of a 6-year-old patient with functional unilateral anterior crossbite whose differentiated diagnosis and early intervention allowed a successful treatment. By manipulating the jaw and positioning the condyles in centric relation (CR), the presence of occlusal interference between the upper and lower deciduous canines on the right side was noticed, which are the causes of mandible anterior displacement with occlusion in MIH. For correction, Planas direct track therapy was used on the upper right canine with composite resin followed by slight wear on the lower right canine. The premature contacts were eliminated, creating an inclined plane of approximately 45 degrees on the palatal face of the upper canine and a slight occlusal adjustment on the incisal surface of the lower right canine. The use of this technique allowed the correction of the functional anterior crossbite immediately after the removal of the occlusal interference. This case shows that the early treatment of crossbites increases the chances of a successful rehabilitation of stomatognathic system. The use of Planas direct tracks proved to be an effective, low-cost, and easy to implement alternative for functional crossbites correction. (AU)

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Pediatric mandibular tumors present an aggressive biological behavior and difficult diagnosis. A wide range of odontogenic and nonodontogenic tumors comprise the spectrum of these lesions. We report a case of a 1-year-old male child patient showing facial asymmetry symptomatic of an expansive lesion extending throughout the body and ramus of the left hemimandible with a diameter of 8 cm. The histopathological report suggested a high-grade mucoepidermoid carcinoma (MEC), recommending further immunohistochemical investigation of the ectomesenchymal or neuroectodermal origin of the tumor cells. The patient evolved with extensive bilateral pleural effusion followed by metastasis in the middle third of the right humerus, and died 2 months after the first biopsy procedure by acute renal failure with tubular necrosis, before a final inconclusive immunohistochemical report was reached. The lack of resources for less-favored regions of Brazil impairs rapid biomolecular examinations such as immunohistochemical resulting in delay of appropriate therapeutic procedures.

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BACKGROUND: Sleep bruxism (SB) is a masticatory muscle activity that affects children. Parents' knowledge is important for its identification and report to dentists. AIM: To investigate parents' knowledge about SB among their children. DESIGN: A cross-sectional study included 1325 parents of children from dental clinics of seven institutions from all regions of Brazil. Parents answered questions about child's sleep, knowledge about SB and its occurrence among children and parents. SB definition given by parents was dichotomized as "correct"/"incorrect", based on the American Academy of Sleep Medicine definition. Descriptive, bivariate and multivariate analyses were performed (P < 0.05). RESULTS: Most parents (57.3%) did not know what SB is and 88.9% would like to receive more information. SB prevalence among parents was 15.4% and 24.0% among children. Between parents who correctly defined SB, its prevalence increased to 27.5% among parents and 40.6% among children. Parents whose children had/have SB, who would like to receive more information about SB and were from the North, Central-West, Southeast, and South regions were more likely to define SB correctly (P > 0.05). CONCLUSION: There is a lack of knowledge of parents about SB. SB among children, parents' interest in receiving more information and their location were factors associated to their knowledge.

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Objetivo: O objetivo deste artigo é apresentar o relato de um caso clínico de luxação extrusiva de dente permanente com rizogênese incompleta, onde não foi necessária a realização de intervenção endodôntica. Relato de caso: Paciente de 6 anos de idade compareceu ao serviço de urgência da Policlínica Odontológica da Universidade do Estado do Amazonas (UEA) para atendimento após queda durante atividade de lazer, apresentando traumatismo direto na boca. Foi informado durante a consulta inicial que o incidente havia ocorrido há cerca de três dias, e que o atendimento imediato logo após o trauma foi realizado em um Serviço de Pronto Atendimento, porém, nenhum tipo de procedimento na cavidade oral foi realizado. Após exames clínico e radiográfico observou-se que o dente 21 apresentava deslocamento parcial para fora do alvéolo dentário no sentido axial, com alteração da oclusão, dor local à palpação e mobilidade dentária. Foi realizada profilaxia da área afetada, e anestesia do dente luxado e tecidos adjacentes. O reposicionamento do dente foi realizado em seguida, pressionando-o e tracionando-o de forma suave e contínua até a sua correta posição dentro do alvéolo. A área afetada foi limpa com gaze estéril embebida em soro fisiológico, e foi instalada uma contenção rígida confeccionada com fio ortodôntico e resina composta. Conclusão: O reposicionamento da maneira adequada do dente traumatizado dentro do alvéolo dentário, num período de tempo hábil, seguido de sua proservação, permitiram a manutenção da vitalidade do tecido pulpar, e consequentemente, o desenvolvimento do segmento radicular.

Objective: The objective of this article is to present a clinical case of extrusive luxation of an immature permanent tooth, with no endodontic management. Case report: A 6-year-old patient was provided to emergency treatment at the State University of Amazonas, as a result of a fall, with a direct trauma to the mouth. It was informed during the initial consultation that the incidente has occurred three days after. Emergency examination had been carried out by an Emergency Service; however, any type of procedure in the oral cavity was performed in ths occasion. After clinical and radiographic examinations, it was observed that tooth 21 presented partial displacement from the alveolar socket in the axial direction, with occlusion alteration, local pain to palpation and dental mobility. Cleaning of the affected area and anesthesia of the dislocated tooth and adjacent tissues were performed. Then, tooth repositioning was performed by pressing and tracing it smoothly and continuously until its correct position within the alveolar socket. The affected area was cleaned with sterile gauze soaked in saline solution, and a rigid containment made of orthodontic wire and composite resin was installed. Conclusion: A proper repositioning of the traumatized tooth within the alveolar socket, followed by its clinical followup, allowed the pulp tissue to remain vital, and consequently, the complete development of the root portion