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Sabe-se que o dente submetido a tratamento endodôntico apresenta um aumento da permeabilidade dentinária, devido a remoção da lama dentinária, pela utilização das substâncias químicas auxiliares (SQA). Logo, uma alteração morfológica acentuada pode deixar superfície dentinária sem suporte mineral, o que pode comprometer a obturação. Assim, a seleção da SQA em relação ao material cimentante é fundamental para uma perfeita adesão às paredes dentinárias. Objetivo: avaliar in vitro o nível da permeabilidade dentinária das substâncias químicas auxiliares mais utilizadas no tratamento endodôntico, na dentina radicular de dentes bovinos. Material e métodos: utilizou-se 40 raízes de espécimes bovinos que foram divididas em quatro grupos (n=10) e irrigados conforme segundo as condições experimentais: G1= 15 ml de hipoclorito de sódio a 0,5% (controle); G2= associação creme Endo-PTC e 15 ml de hipoclorito de sódio a 0,5%; G3= 15 ml de EDTA-T a 17%; G4= 15 ml de ácido cítrico a 10%. Em seguida, os canais radiculares foram preenchidos com corante azul de metileno a 2%, com ph 7,2, por 24 horas. Em seguida, os corpos-de-prova foram seccionados transversalmente em três fragmentos de 2 mm de espessura, para leitura em um estereoscópio, com aumento de 25 vezes. A quantificação do nível de infiltração de corante foi realizada através de uma fórmula matemática. Resultados: após a análise estatística, os resultados mostraram-se estatisticamente significante. Conclusão: concluiu-se que existe uma alta permeabilidade da dentina radicular às substâncias químicas auxiliares utilizadas durante o tratamento endodôntico.

It is known that the tooth submitted to endodontic treatment presents an increase in dentinal permeability, due to the removal of dentinal mud, through the use of auxiliary chemical substances (SQA). Therefore, a marked morphological alteration can leave the dentinal surface without mineral support, which can compromise the filling. Thus, the selection of the SQA in relation to the cementing material is fundamental for a perfect adhesion to the dentinal walls. Objective: to evaluate in vitro the level of dentin permeability of auxiliary chemical substances most used in endodontic treatment, in the root dentin of bovine teeth. Material and methods: 40 roots of bovine specimens were used, which were divided into four groups (n = 10) and irrigated according to the experimental conditions: G1 = 15 ml of 0.5% sodium hypochlorite (control); G2 = Endo-PTC cream association and 15 ml of 0.5% sodium hypochlorite; G3 = 15 ml of 17% EDTA-T; G4 = 15 ml of 10% citric acid. Then, the root canals were filled with 2% methylene blue dye, with ph 7.2, for 24 hours. Then, the specimens were cross-sectioned into three 2 mm thick fragments, for reading on a stereoscope, with a 25-fold magnification. The quantification of the level of dye infiltration was performed using a mathematical formula. Results: after the statistical analysis, the results proved to be statistically significant. Conclusion: it was concluded that there is a high permeability of root dentin to auxiliary chemical substances used during endodontic treatment.

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A política nacional de promoção da saúde aponta estratégias para produzir saúde, sendo a escola um espaço privilegiado para o desenvolvimento destas ações. Sendo assim, o objetivo deste trabalho foi relatar a experiência durante as práticas educativas em saúde, sobre a avulsão dentária, desenvolvidas por graduandos de odontologia em um projeto de extensão voltado aos escolares do ensino fundamental de Belém-PA. Com base nas palestras, a falta de conhecimento sobre trauma dental foi rotineiramente observada durante as orientações, sendo o professor o principal ator, pois este é o responsável pelas crianças durante o horário escolar e precisa estar bem preparado para agir de forma eficaz em caso de acidente. Concluiu-se que esta vivência dos acadêmicos colaborou com a formação generalista e interdisciplinar, o vínculo, a troca de saberes e inovou a prática de educação em saúde articuladas com a temática prioritária sobre avulsão dental.

The national health promotion policy points out strategies to produce health, being the school a privileged space for the development of these actions. Thus, this paper aims to report the experiences during health educational practices on dental avulsion developed by undergraduate dentistry students in an extension project aimed at elementary school students from Belém-PA. Based on the meeting the lack of knowledge about dental trauma was routinely seen during the orientations, being the teacher the main actor, as this is responsible for the children during school hours and needs to be well prepared to act effectively in case of accident. It was concluded that this experience of academics collaborated with the generalist and interdisciplinary training, the bond, the exchange of knowledge and innovated the practice of health education articulated with the priority theme on dental avulsion.

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Hoje em dia no consultório a indicação de uma prótese fixa em cantilever, ainda gera muitas dúvidas, levando o clinico inseguro, muitas vezes a sua contra indicação. Com intuito de esclarecer as características relacionadas à prótese parcial fixa em cantilever realizou- -se uma revisão de literatura. Uma busca foi realizada nas bases de dados Scielo e Pubmed usando-se as palavras-chaves: Prótese fixa, cantilever, dentes suportes. Os artigos dentro do escopo do estudo foram selecionados e pode-se concluir que estas próteses são uma excelente alternativa conservadora para restabelecimento de dentes perdidos, porém para obtenção de resultados satisfatórios com boa longevidade, especial atenção deve ser desprendida aos princípios biomecânicos dos preparos e um controle rigoroso de placa bacteriana deve ser estabelecido.

Actuality the use of Fixed Partial Denture with Cantilever until causes many doubts, making de dentist do not indicate this treatment. To making clear the characteristics relation to this prosthesis, was done a literature review. A search was performed in the Scielo and Pubmed databases using the keywords: Fixed prosthesis, cantilever, supporting teeth. The articles within the scope of the study were selected and it can be concluded that these were an alternative excellent to reestablish the follow teeth, therefore to obtain the good results with respect long-term prosthetic appliances, special attention should be dispensed to the biomechanics principles and optimal hygiene with plaque control should be established.

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ABSTRACT: The present study evaluated the presence of apical deviation and tapering in preparations performed with the use of the automated handpieces with continuous motion, the K3 Endo system (Group 1) and instrumentation manually with Protaper (Group 2). 30 simulated roots were divided into two groups and prepared according each technique. The alteration caused by root canal preparation was analyzed by radiographs obtained on a radiographic desk fabricated for the study. The results (X2), demonstrated that the K3 Endo produced a smaller incidence of apical deviation and Protaper produced a greater tapering of the root canals.

RESUMEN: El objetivo de este trabajo fue evaluar la presencia de desviación y conicidad adecuada apical con el uso del sistema de instrumentación de movimiento continuo K3 Endo (Grupo 1) respecto a la instrumentación manual realizada con Limas Protaper (Grupo 2). Treinta canales curvos simulados fueron divididos aleatoriamente en dos grupos e instrumentados por los diferentes sistemas. La alteración causada por la preparación de los canales fue analizada en radiografías obtenidas, en placas ad hoc. Los resultados (X2) demostraron que el K3. Endo produjo una menor incidencia de desviación apical y Protaper produjo una mayor conicidad de los canales radiculares.

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Iatrogenic perforation is a procedural incident that may occur in endodontic treatments of primary and/or permanent teeth. Prognosis may be favorable if a complete seal with biomaterial is immediately established. Several materials, including glass-ionomer cement (GIC), have been used to seal different types of perforation defects. GIC is considered to be biocompatible, nontoxic, and non-irritating, and promotes bone healing and cementum regeneration. In the present case, GIC was used to treat an endodontic perforation. The perforation was cleaned with periodontal curettes and sealed with GIC. A reintervention was needed in which sealing was performed with a light-curing GIC, a material that was less rough than the initial material used. After 2 years, the absence of periradicular radiolucent lesions, pain, and swelling along with functional tooth stability indicated a successful outcome of sealing perforation in the case.

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RESUMEN: Las enfermedades gastrointestinales inflamatorias se caracterizan por la desarmonía de la flora bacteriana del intestino. Estos cambios se caracterizan como un problema de salud pública que demuestra que las principales causas de las enfermedades están asociadas a la alimentación inadecuada y, como consecuencia de cambios en la mucosa oral. Los países desarrollados están actualmente definiendo estrategias para el control de esas enfermedades, teniendo como una de las estrategias públicas para la promoción de la alimentación sana. En este contexto, el objetivo de este trabajo fue evaluar la legislación brasileña vigente en cuanto al cuadro de profesional nutricionista para elaborar y acompañar el menú de la alimentación escolar, conforme prevé la Ley Federal nº 8.234, de 17 de septiembre de 1991, y la Resolución del Consejo Federal de Nutricionistas - CFN n ° 380/2005. Se realizó el levantamiento de las Leyes que establecen un cuadro de profesionales nutricionistas en las escuelas públicas de las principales ciudades brasileñas en los órganos competentes. Los resultados muestran que pocos Estados y Municipios abordan ese tema, entre ellos el Estado de Río de Janeiro, el Estado de São Paulo, la ciudad de Ribeirão Preto, la ciudad de Florianópolis, la ciudad de Belém, el Estado de Santa Catarina, El Estado de Paraná, el Distrito Federal y el Estado de Ceará ya regularon la materia, así como la Ley nº 13.666 / 2018 que modifica la Ley nº 9.394 / 16. Los autores concluyen que además de conocer las pecurialidades de las manifestaciones orales de estos pacientes es imprescindible el conocimiento multidisciplinario del cirujano dentista, creando no sólo oportunidades de diagnóstico precoz, sino también la prevención y promoción de la salud oral.

ABSTRACT: Inflammatory intestinal diseases are characterized by disharmony of the bacterial flora of the intestine. These changes are characterized as a public health problem demonstrating that the main causes of diseases are associated with inadequate nutrition and, as a consequence, changes in the oral mucosa. The developed countries are currently defining strategies for the control of these diseases, having as one of the public strategies to promote healthy eating. In this context, the objective of this study was to evaluate the Brazilian legislation in force regarding the professional dietitian to elaborate and follow the menu of school feeding, according to Federal Law No. 8,234, dated September 17, 1991, and the Resolution of the Federal Council of Nutritionists - CFN n ° 380/2005. It was carried out the survey of the Laws that establish a cadre of nutrition professionals in the public schools of the main Brazilian cities in the competent bodies. The results show that few States and Municipalities address this theme, among them the State of Rio de Janeiro, the State of São Paulo, the city of Ribeirão Preto, the city of Florianópolis, the city of Belém, the State of Santa Catarina, State of Paraná, the Federal District and the State of Ceará have already regulated the matter, as well as Law 13,666 / 2018, which amends Law 9,394 / 16. The authors conclude that besides knowing the characteristics of the oral manifestations of these patients, a multidisciplinary knowledge of the dental surgeon is essential, creating opportunities for early diagnosis, as well as the prevention and promotion of oral health.

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ABSTRACT: The objective of this study was to evaluate the color alteration of four brands of artificial teeth (Art Plus, Trilux, Bionote and Biolux), after immersion in color solutions of coffee, red wine and urucum. We used 80 artificial teeth, which were standardized with 2 mm thickness. Then, they were subjected to finishing and polishing, and divided into 4 groups (n = 05), which were immersed in one of the 3 types of dye, plus distilled water (control). The samples were immersed daily for 4 hours, then they were removed, washed in tap water, dried with absorbent paper and immersed in distilled water for the subsequent hours in a biological glasshouse at 37 ºC, for 21 days. The evaluation of the color change was made in the periods of 0, 7, 14 and 21 days, by means of the tristimulus colorimeter. The data were subjected to the ANOVA and Tukey test with a 5 % significance. The results showed that the urucum was the substance that caused the greatest staining while the coffee and the wine did not show statistical difference. Regarding trademarks, Trilux presented a statistical difference compared to the other commercial brands, revealing colorimetric alteration only in the 14-day period. It was concluded that the composition of the artificial teeth, the type of pigmenting agent and the immersion time determine the color change.

RESUMEN: El objetivo de este estudio fue evaluar la alteración de color de cuatro marcas de dientes artificiales (Art Plus, Trilux, Bionote y Biolux), después de inmersión en soluciones colorantes de café, vino tinto y urucum. Se utilizaron 80 dientes artificiales, los cuales fueron estandarizados con 2 mm de espesor. En seguida, los mismos fueron sometidos al acabado y pulido, y divididos en 4 grupos (n = 5), los cuales fueron inmersos en uno de los 3 tipos de colorante, más agua destilada (control). Las muestras permanecieron inmersas diariamente durante 4 horas, luego fueron retiradas, lavadas en agua corriente, secas con papel absorbente e inmersas en agua destilada por las horas subsiguientes en invernadero biológico a 37 ºC, por 21 días. La evaluación del cambio de color se realizó en los períodos de 0, 7, 14 y 21 días, por medio del colorímetro tristimulo. Los datos fueron sometidos a la prueba ANOVA y Tukey con un 5 % de significancia. Los resultados demostraron que el urucum fue la sustancia que provocó mayor manchado mientras que el café y el vino no presentaron diferencia estadística. En cuanto a las marcas comerciales, el Trilux presentó una diferencia estadística en comparación con las otras marcas comerciales, revelando alteración colorimétrica sólo en el período de 14 días. Se concluyó que la composición de los dientes artificiales, el tipo de agente pigmentante y el tiempo de inmersión determinan el cambio de color.

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ABSTRACT: Orthodontic cements have been used to enhance retention between the band and the crown, however, unfavorable properties found in many of these cements may contribute to cement failure between band and crown's surface and leading to unsuccessful application of orthodontic forces. The aim of this study was to evaluate the shear strength of the Orthobite composite (FGM) using the Single Bond adhesive system (3M). The sample consisted of 30 bovine incisors divided in 2 groups (n=15). All teeth were submitted to prophylaxes with pumice stone and etching with phosphoric acid. In Group I the Orthobite was used conventionally. Group II was similar to Group I, however, the Single Bond adhesive system was applied after conditioning. The samples were stored in distilled water in incubator at 37 ºC for 24 h and submitted to the shear strength test at a speed of 0.5 mm/minute speed. Data were submitted to the Student T test (5 %). The results (MPa) showed no statistically significant differences between the groups, regardless of surface treatment. Thus, all groups exhibited adequate adhesive bond strength for clinical use.

RESUMEN: Los cementos ortodónticos se han utilizado para aumentar la retención entre la banda y la corona, sin embargo, las propiedades desfavorables encontradas en muchos de estos cementos pueden contribuir a la falla del cemento entre la superficie de la banda y la corona y llevar a la aplicación incorrecta de fuerzas de ortodoncia. El objetivo de este trabajo fue evaluar la resistencia al cizallamiento del compuesto Orthobite (FGM) utilizando el sistema adhesivo Single Bond (3M). La muestra consistió de 30 incisivos bovinos divididos en dos grupos (n = 15). Todos los dientes recibieron profilaxis con piedra pómez y acondicionamiento del esmalte con ácido fosfórico. En el Grupo I, se utilizó Orthobite de manera convencional. El Grupo II fue similar al I, pero se aplicó el sistema adhesivo Single Bond, después de acondicionamiento. Los cuerpos de prueba fueron almacenados en agua destilada en estufa a 37 ºC por 24 h y sometidos al ensayo de resistencia al cizallamiento, con velocidad de 0,5 mm por minuto. Los datos fueron sometidos a la prueba de T Student (5 %). Los resultados (en MPa) no mostraron diferencias estadísticamente significativas entre los grupos, independientemente del tratamiento de la superficie. De esta forma, todos los grupos presentaron resistencia adhesiva adecuada para uso clínico.

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The increasing demand of patients looking for esthetics has resulted in the development of several techniques to restore anterior teeth. Conservative treatments should always be the first therapeutic option for the solution of aesthetic problems involving morphological changes and usually provide the result that the patient expects. In this context, ceramic laminate veneers, also known as "contact lenses," are capable to provide an extremely faithful reproduction of natural teeth with great color stability and periodontal biocompatibility. Minimal or no preparation veneers are heavily advertised as the answer to patients' cosmetic needs, when properly indicated by the dentist. This paper reports a clinical case where lateral incisor agenesis was aesthetically corrected using ceramic laminates.

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Introdução: as semelhanças filogenéticas entre primatas não humanos e seres humanos estimulam estudos de seu sistema estomatognático, visando seu uso em pesquisas. Objetivo: descrever as estruturas anatômicas da maxila e da mandíbula do Cebus apella, comparando às características humanas. Material e Método: foram utilizados dois animais adultos. Após a remoção do tecido orgânico, os crânios e maxilas foram radiografados e fotografados, sendo analisados com a lupa. Resultado e discussão: as estruturas anatômicas da maxila e da mandíbula apresentavam características semelhantes ao ser humano, mas com algumas peculiaridades, tais como: a presença do terceiro pré-molar; proeminências caninas evidentes em ambos os arcos; a colocação mental do majestoso; largura do ramo ascendente do maxilar; a presença do forame mandibular; Formato V do maxilar; o tamanho do forame incisivo; presença da sutura incisiva. Com relção à interpretação radiográfica da câmara pulpar e canal radicular desta espécie, os dentes incisivos central e lateral superiores, caninos superiores e inferiores e 1º, 2º, 3º Pré-molares inferiores são dentes com canais únicos, amplos, de fácil acesso e, desse modo, ideais para experimentos endodônticos. Conclusão: o Cebus apella pode ser usado como modelo de estudo em tratamento endodôntico.

Introduction: the phylogenetic similarities between non-human primates and humans stimulate studies of their stomatognathic system, aiming their use in research. Objective: the objective of this study was to describe the anatomical structures of the maxilla and mandible of Cebus apella comparing to human characteristics. Material and Method: two adult animals were used. After removing the organic tissue, the skulls and jaws were x-rayed and photographed, being analyzed with the magnifying glass. Results: the results showed that the anatomical structures of the maxilla and the mandible had similar characteristics to the human being, but with some peculiarities, such as: the presence of the third premolar; prominent canine prominences in both arches; the mental setting of the majestic; width of ascending branch of maxilla; the presence of the mandibular foramen; V shape of the jaw; incisor foramen size; presence of the incisive suture. With respect to the radiographic interpretation of the pulp chamber and root canal of this species, the maxillary and mandibular maxillary teeth, maxillary and mandibular maxillary teeth are teeth with single, wide, easily accessible ideal for endodontic experiments. Conclusion: thus, the authors conclude that Cebus apella can be used as a study model in endodontic treatment.

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