Surface topography of resorbable porcine collagen membranes, and their effect on early osteogenesis: An in vitro study.

OBJECTIVE: Guided tissue regeneration (GTR) is based on the use of different membranes that function as sealants and barriers in specific clinical situations. Among the several tissue production methods and origins, resorbable porcine-derived membranes are the most commonly used. Because these membranes are so diverse, and have several different clinical applications, doubts linger as to their effect in stimulating osteogenesis. The objective of this study was to make an in vitro evaluation of the viability and differentiation of osteoblastic cells cultured on the surface of the following collagen membranes: Jason® (Botiss Biomaterials), Collprotect® (Botiss Biomaterials), and Bio-Gide® (Geistlich). MATERIAL AND METHODS: Fragments of the 3 resorbable collagen membranes (5 × 5 mm) were used, and pre-osteoblastic SAOS-2 cells (ATCC, USA) were plated on their porous surfaces. Evaluation of the membranes was performed at 3, 5 and 7 days, considering the following parameters: (1) topographic analysis of the different surfaces by scanning electron microscope; (2) cellular viability by MTT, (3) quantification of type I collagen and osteopontin by Elisa. The quantitative analyses were carried out using a significance level of 5%. RESULTS: Collprotect® and Jason® membranes presented a rough surface with an irregular aspect on both sides, while double-layered Bio-Gide® had one layer with a smooth surface and the other with a rough surface along each respective length. The viability assays revealed that the cells cultured the cells grown on Collprotect® showed higher viability than those grown in Bio-Gide® or Jason®, especially after 5 and 7 days. After 3 and 5 days, evaluation of type I collagen showed that the cells plated on the Jason® and Collprotect® surfaces had greater collagen secretion than those plated on BioGide®. After 7 days, an increase in osteopontin levels was observed when the cells were plated on all the experimental membranes, compared with the control group. CONCLUSION: All the tested membranes were suitable for use in GTR clinical procedures. Their indication in specific regenerative cases depends on the mechanical and biological properties of their originating tissues, thus enabling better results and assertive choices by dental professionals.

Repairing Boolean logical models from time-series data using Answer Set Programming.

BACKGROUND: Boolean models of biological signalling-regulatory networks are increasingly used to formally describe and understand complex biological processes. These models may become inconsistent as new data become available and need to be repaired. In the past, the focus has been shed on the inference of (classes of) models given an interaction network and time-series data sets. However, repair of existing models against new data is still in its infancy, where the process is still manually performed and therefore slow and prone to errors. RESULTS: In this work, we propose a method with an associated tool to suggest repairs over inconsistent Boolean models, based on a set of atomic repair operations. Answer Set Programming is used to encode the minimal repair problem as a combinatorial optimization problem. In particular, given an inconsistent model, the tool provides the minimal repairs that render the model capable of generating dynamics coherent with a (set of) time-series data set(s), considering either a synchronous or an asynchronous updating scheme. CONCLUSIONS: The method was validated using known biological models from different species, as well as synthetic models obtained from randomly generated networks. We discuss the method's limitations regarding each of the updating schemes and the considered minimization algorithm.

YEASTRACT: an upgraded database for the analysis of transcription regulatory networks in Saccharomyces cerevisiae.

The YEAst Search for Transcriptional Regulators And Consensus Tracking (YEASTRACT-www.yeastract.com) information system has been, for 11 years, a key tool for the analysis and prediction of transcription regulatory associations at the gene and genomic levels in Saccharomyces cerevisiae. Since its last update in June 2017, YEASTRACT includes approximately 163000 regulatory associations between transcription factors (TF) and target genes in S. cerevisiae, based on more than 1600 bibliographic references; it also includes 247 specific DNA binding consensus recognized by 113 TFs. This release of the YEASTRACT database provides new visualization tools to visualize each regulatory network in an interactive fashion, enabling the user to select and observe subsets of the network such as: (i) considering only DNA binding evidence or both DNA binding and expression evidence; (ii) considering only either positive or negative regulatory associations; or (iii) considering only one set of related environmental conditions. A further tool to observe TF regulons is also offered, enabling a clear-cut understanding of the exact meaning of the available data. We believe that with this new version, YEASTRACT will improve its role as an open web resource instrumental for Yeast Biologists and Systems Biology researchers.

Evaluation of a Titanium Surface Treated with Hydroxyapatite Nanocrystals on Osteoblastic Cell Behavior: An In Vitro Study.

PURPOSE: In the context of macrostructural and microstructural modifications to the design of dental implants, surface topography changes with different treatments have the purpose of accelerating bone formation. The aim of this study was to evaluate in vitro the influence of aggregated hydroxyapatite nanocrystals to surfaces treated with double acid etching (Nano) on osteoblastic cell behavior compared with a conventional double acid-etched surface (DE). MATERIALS AND METHODS: Commercially pure Grade 4 titanium discs (6 × 2 mm) were selected, and both cell proliferation and viability were assessed at 24, 48, and 72 hours using Trypan blue vital dye and MTT, respectively. The expression of type I collagen and osteopontin on such surfaces was evaluated using ELISA. Immunostaining for fibronectin was also performed. Quantitative data were analyzed statistically using two-way analysis of variance (ANOVA) followed by Bonferroni post-test with a 5% significance level. RESULTS: The results showed that in all evaluated time periods, cells expressed fibronectin on both surfaces. The cells presented greater morphologic spreading on the Nano surface when compared with the conventional DE surface in all assessed times. Increased cell proliferation and viability were detected in the Nano surface (P < .05) when compared with the conventional DE surface, especially after 72 hours. Osteopontin expression was higher after 24 hours in the Nano surface when compared with the conventional DE surface (P < .05). For type I collagen, a higher expression was observed with the Nano surface than with the DE surface, again after 72 hours (P < .05). CONCLUSION: This in vitro study showed that the treated Nano surface tested promoted increased cell proliferation and viability when compared with the control surface. Additionally, increased cell spreading as well as type I collagen and osteopontin secretion were observed, favoring the early events of osseointegration.

Relação entre maloclusões e queixas de problemas mastigatórios e gastrointestinais em crianças / Relationship between malocclusions and complaints of masticatory and gastrointestinal problems in children

Objetivo: Avaliar a relação entre as maloclusões e queixas de problemas mastigatórios e gastrointestinais em crianças. Métodos: Realizou-se um estudo transversal com uma amostra intencional de 232 crianças de ambos os sexos, com idades entre 6 e 12 anos, provenientes de uma amostra de 634 crianças de 3 a 12 anos examinadas durante um levantamento de saúde bucal na cidade do Recife/PE. Participaram do estudo apenas as crianças livres de cárie. Foram excluídas as crianças com síndromes associadas a deformidades craniofaciais, as crianças submetidas a tratamento ortodôntico ou ortopédico facial prévio, crianças com presença de desgastes acentuados nas faces oclusais dos elementos dentários e crianças com alterações dentárias de forma, número ou tamanho. Os dados foram coletados através de dois instrumentos: entrevistas com os responsáveis e exames clínicos. As maloclusões foram avaliadas a partir da classificação de Angle e da observação da ocorrência de mordida aberta anterior, mordida cruzada anterior e mordida cruzada posterior. Foi utilizada ficha clínica padrão da Organização Mundial de Saúde. A análise estatística foi realizada utilizando-se os testes Quiquadrado de Pearson e Exato de Fisher. Resultados: Os sintomas de distúrbios gastrointestinais ocorreram em 19,8% das crianças, sendo a prisão de ventre a queixa mais citada (9,9%). Os sintomas gastrointestinais não foram associados à presença das maloclusões. A mordida cruzada anterior foi associada à dificuldade para mastigar (p < 0,05) e à necessidade de ingerir líquidos durante as refeições (p=0,017). Conclusão: As crianças com mordida cruzada anterior apresentaram maiores dificuldades mastigatórias em relação ao grupo sem esta maloclusão.(AU)

Objective: To evaluate the relationship between malocclusion and complaints of masticatory and gastrointestinal problems in children. Methods: A cross-sectional study was carried out with an intentional sample of 232 children of both sexes, 6 to 12 years of age, from a sample of 634 children, 3 to 12 years of age, who were examined during an oral health survey in the city of Recife, PE, Brazil. Only caries-free children participated in this study. Children with disabilities were excluded, as were children who had undergone orthodontic or facial orthopedic treatment, children with clearly accentuated wear on the occlusal surfaces of their teeth, and children with dental alterations in shape, size, or number. Data were collected through two instruments: interviews with the responsible guardians and clinical examinations. Malocclusions were evaluated by means of Angle classification and observation of the occurrence of anterior open bite, anterior crossbite, and posterior crossbite. The World Health Organization (WHO) standard clinical record was used. The statistical analyses were performed using the Pearson's chisquare test and the Fisher Exact test. Results: The symptoms of gastrointestinal disorders occurred in 19.8% of the children, constipation being the most cited complaint (9.9%). Gastrointestinal symptoms were not associated with the presence of malocclusions. Anterior crossbite was associated with difficulty in chewing (p<0.05) and the need to ingest liquids during meals (p=0.017). Conclusion: Children with anterior crossbite showed greater mastigatory difficulties when compared to the group without this malocclusion.(AU)

Peri-implantite: etiologia e tratamento / Periimplantitis: etiology and treatment

A peri-implantite tem sido descrita como uma alteração patológica dos tecidos ao redor dos implantes osseointegrados, sendo a microbiota e o trauma oclusal considerados seus principais fatores etiológicos. A profundidade de sondagem, o sangramento, a mucosa queratinizada, o fluxo do fluido sulcular e o infiltrado inflamatório servem como parâmetros para avaliar a saúde peri-implantar. O tratamento da peri-implantite inclui debridamento mecânico, instrução de higiene oral, destoxificação da superfície implantar, uso de antimicrobianos e terapias ressectivas e regenerativas. Uma correta intervenção parece ser necessária para a resolução da lesão peri-implantar.

The peri-implantitis has been described as a pathological alteration of tissues around dental implants, and the microbiota and occlusal trauma considered its main etiological factors. The probing depth, bleeding, keratinized tissue, the flow of sulcular fluid and inflammatory infiltrate serve as parameters to evaluate the peri-implant health. Treatment of peri-implant includes mechanical debridement, oral hygiene instruction, surface detoxification deploy, use of antibiotics and resective and regenerative therapies. A correct intervention seems necessary for the resolution of the peri-implant injury.

Implante dentário em alvéolo de extração com regeneração óssea guiada – cinco anos de acompanhamento tomográfico feixe cônico / A dental implant in the fresh extraction socket with guided-bone regeneration – a 5-year cone beam computerized tomographic follow-up

A exigência estética nos dias de hoje está junto, senão à frente, dos processos funcionais em reabilitação oral. A perda dentária precoce de dentes anteriores, quando relacionada a casos de severas perdas ósseas, estão entre os casos mais complexos para se atingir resultados positivos na Implantodontia, seja ela estética ou funcional. No presente caso, o paciente apresentou-se com fratura do elemento incisivo central superior esquerdo, com perda óssea considerável na face vestibular e necessitando de reabilitação com implantes osseointegrados e regeneração óssea guiada (ROG), acompanhado de membrana de colágeno reabsorvível. Após o período de osseointegração, foram realizados procedimentos de moldagem e condicionamento dos tecidos ao redor, através de instalação de provisório e posterior confecção de restauração final metalocerâmica. Após acompanhamento tomográfico do caso durante cinco anos, fica evidente a manutenção tecidual e óssea da região citada acima.

Nowadays, the esthetic demands are well-beyond the functional processes for oral rehabilitation. Premature tooth loss in the anterior zone, when related to severe bone loss, are the most complex cases to generate positive results on implant dentistry. In this case, the patient presented with fracture of the maxillary left central incisor, a considerable buccal bone loss, and in need of a dental implant and guided bone regeneration (GBR) with a resorbable collagen membrane. After the osseointegration period, impression procedures and peri-implant soft tissue conditioning were performed by using a provisional restoration before the defi nitive metalloceramic restoration. The 5-year CBCT follow-up revealed soft and hard tissue stable contours in the aforementioned region.

Mandibular asymmetry: a proposal of radiographic analysis with public domain software.

OBJECTIVE: This preliminary study aimed to propose a new analysis of digital panoramic radiographs for a differential diagnosis between functional and morphological mandibular asymmetry in children with and without unilateral posterior crossbite. METHODS: Analysis is based on linear and angular measurements taken from nine anatomic points, demarcated in sequence directly on digital images. A specific plugin was developed as part of a larger public domain image processing software (ImageJ) to automate and facilitate measurements. Since panoramic radiographs are typically subject to magnification differences between the right and left sides, horizontal linear measurements were adjusted for greater accuracy in both sides by means of a Distortion Factor (DF). In order to provide a preliminary assessment of proposed analysis and the developed plugin, radiographs of ten patients (5 with unilateral posterior crossbite and 5 with normal occlusion) were analyzed. RESULTS: Considerable divergence was found between the right and left sides in the measurements of mandibular length and position of condyles in patients with unilateral posterior crossbite in comparison to individuals with normal occlusion. CONCLUSION: Although there are more effective and accurate diagnostic methods, panoramic radiography is still widespread, especially in emerging countries. This study presented initial evidence that the proposed analysis can be an important resource for planning early orthodontic intervention and, thus, avoid progression of asymmetries and their consequences.

Mandibular asymmetry: A proposal of radiographic analysis with public domain software

OBJECTIVE: This preliminary study aimed to propose a new analysis of digital panoramic radiographs for a differential diagnosis between functional and morphological mandibular asymmetry in children with and without unilateral posterior crossbite. METHODS: Analysis is based on linear and angular measurements taken from nine anatomic points, demarcated in sequence directly on digital images. A specific plug-in was developed as part of a larger public domain image processing software (ImageJ) to automate and facilitate measurements. Since panoramic radiographs are typically subject to magnification differences between the right and left sides, horizontal linear measurements were adjusted for greater accuracy in both sides by means of a Distortion Factor (DF). In order to provide a preliminary assessment of proposed analysis and the developed plug-in, radiographs of ten patients (5 with unilateral posterior crossbite and 5 with normal occlusion) were analyzed. RESULTS: Considerable divergence was found between the right and left sides in the measurements of mandibular length and position of condyles in patients with unilateral posterior crossbite in comparison to individuals with normal occlusion. CONCLUSION: Although there are more effective and accurate diagnostic methods, panoramic radiography is still widespread, especially in emerging countries. This study presented initial evidence that the proposed analysis can be an important resource for planning early orthodontic intervention and, thus, avoid progression of asymmetries and their consequences. .

OBJETIVO: esse estudo preliminar teve como objetivo propor uma nova análise de radiografias panorâmicas digitais para o diagnóstico diferencial entre a assimetria mandibular funcional e morfológica em crianças com e sem mordida cruzada unilateral posterior. MÉTODOS: a análise se baseia em medições lineares e angulares, tomadas a partir de nove pontos anatômicos, demarcados em sequência, diretamente nas imagens digitais. Um plugin específico foi desenvolvido para automatizar e facilitar as medições, como parte integrante de um software de processamento de imagem de domínio público (ImageJ). Para maior acurácia, uma vez que as radiografias panorâmicas são sujeitas a distorções entre os lados direito e esquerdo, as medidas lineares horizontais foram ajustadas em ambos os lados, utilizando-se o Fator de Distorção (DF). A fim de fornecer uma avaliação preliminar da análise proposta e do plugin desenvolvido, radiografias de 10 pacientes (5 com mordida cruzada unilateral posterior e 5 com oclusão normal) foram analisadas. RESULTADOS: divergência considerável foi encontrada entre os lados direito e esquerdo nas medições do comprimento do corpo da mandíbula, bem como a posição dos côndilos, em pacientes com mordida cruzada posterior, em comparação a indivíduos com oclusão normal. CONCLUSÃO: apesar de existirem métodos mais eficazes e precisos de diagnóstico, a radiografia panorâmica ainda é muito difundida, especialmente em países emergentes. Esse estudo apresentou evidência preliminar de que a análise proposta pode ser um recurso importante para o planejamento de intervenção ortodôntica precoce, de modo a evitar progressão das assimetrias e suas consequências. .

Influence of periodontal biotype on the presence of interdental papillae.

The absence of interdental papillae can be a negative influence in aesthetics. Periodontal biotype (PB) is one of the factors that can possibly influence this relation and has to be considered in periodontal diagnosis and treatment planning. The objective of this study was to evaluate the influence of the periodontal biotype on the presence and absence of interdental papillae. Forty-seven patients were included in this transversal clinical study. The PB, presence and height of interdental papilla, loss of papillary height, and the distance between the base of the contact point and bone crest (CP-BC) were evaluated. The chi-square test was used to verify the significance level of the PB distribution frequency between groups. The Mann-Whitney test was used to compare the CP-BC measures between the different PB groups, and the correlation test was used to verify the relation between the CP-BC distance and the presence of papillae. The thin PB group presented a significantly higher presence of papillae (71.1%) than did the thick PB group (59.6%, P < 0.05). An inverse and proportional correlation between the CP-BC distance and the presence of papillae was found. The authors concluded that the PB influenced the presence and height of interdental papillae.

Ocorrência da doença periodontal e da sua relação com as maloclusões / Occurence of periodontal disease and its relation to malocclusions

Sabendo que alterações oclusais propiciam maior retenção de biofilme e, portanto, facilitam a instalação da doença periodontal, este trabalho teve como objetivo investigar a possível relação entre os diferentes tipos de maloclusões e a doença periodontal em pacientes atendidos nas clínicas do Departamento de Odontologia da UEPB, realizando uma análise das principais maloclusões presentes em uma amostra de 30 pacientes, relacionadas à tal patologia. Foram utilizados exames, tais como Índice de Higiene Oral Simplificado, Registro Periodontal Simplificado e Índice de Sangramento Gengival, a fim de verificar a condição periodontal e o grau de higiene do paciente. Também foi realizada uma análise da oclusão, com a finalidade de dividir os grupos de estudo de acordo com o tipo de má oclusão que apresentavam. A análise estatística foi realizada por meio do teste de kruskal-wallis, com nível de significância de 5,0%. A maioria dos pacientes examinados apresentou maloclusão de Classe I (56,66%) e 80% da amostra exibiu apinhamento dentário. No que diz respeito ao grau de higiene bucal dos pacientes, verificou-se que a maioria apresentou um grau de higiene satisfatório (46,66%). A gengivite foi encontrada em 86,66% dos pacientes, e o índice de sangramento gengival mais prevalente variou de 0 a 25% (43,33%). Concluiu-se que a presença de sangramento gengival, de biofilme e de cálculo dentais usualmente é observada em pacientes portadores dos diferentes tipos de maloclusões, sendo a gengivite a condição periodontal mais frequentemente encontrada nessa população.

Knowing that occlusal alterations provide dental biofilm retention and, therefore, facilitate the progression of periodontal disease, this work had the objective of investigating the possible relation between the different kinds of malocclusions and periodontal disease in patients attended in clinics from Dentistry Department of UEPB, by analyzing the main kind of malocclusion presented by a sample of 30 patients, related to this pathology. It was used exams like Simplified Oral Hygiene Index, Periodontal Screening and Recording (PSR) and Gingival Bleeding Index in order to verify the patient's periodontal condition and oral hygiene level. The occlusal analysis was also done in order to divide the groups according to the kind of malocclusion. It was used the kruskal-wallis test to statistical analysis, with significance level of 5,0%. Most of the examined patients presented malocclusion Class I (56,66%) and 80% of the sample presented dental crowding. Concerning to the hygiene level, it was observed that 46,66% of the patients presented a satisfactory level. Gingivitis was found on 86,66% of the sample. And the most prevalent gingival bleeding level was the one which varied from 0 to 25% (43,33%). We conclude that the presence of gingival bleeding, dental biofi1lm and calculus is usually observed in patients who present different kinds of malocclusion, and the gingivitis is the periodontal condition most frequently found among this population.

Bruxismo infantil: prevalência, etiologia, diagnóstico e tratamento – uma abordagem literária: [revisão] / Bruxism in children: prevalence, etiology, diagnosis and treatment - a literary approach: [review]

O bruxismo é uma atividade parafuncional do sistema mastigatório que inclui apertar ou ranger os dentes, continuamente, durante o dia e/ou à noite, geralmente de maneira inconsciente, em intervalos de atividades não funcionais do sistema estomatognático. As crianças, por motivos variados, podem desenvolver esse hábito, prejudicando o equilíbrio entre função e desenvolvimento. A etiologia do bruxismo é multifatorial; assim como são as formas de tratamento, pois essas devem ser individualizados. E, o grande aumento das forças oclusais geradas por esse, resulta em cargas extras não só na dentição, mas também em todo o sistema estomatognático, podendo causar efeitos variados como danos à articulação temporomandibular (ATM), aos músculos, ao periodonto e à oclusão. Apenas recentemente tem surgido o interesse do estudo desse fenômeno em crianças, provando que é um hábito oral muito frequente na infância. Esse trabalho tem como objetivo descrever através da literatura a etiologia, a prevalência, o diagnóstico e a conduta a ser realizada frente aos comportamentos parafuncionais orais.

The bruxism is a parafunctional activity of masticatory system that includes tightening or gnash their teeth, continuously during the day and/or at night, usually so unconscious, at intervals of no functional activities of the stomatognathic system. The children, for various reasons, can develop that habit, jeopardizing the balance between function and development. The etiology of bruxism is multifactorial, as well as forms of treatment, as these must be individualized. And the big increase in occlusal forces generated by him, resulting in extra charges not only in the teeth, but also throughout the stomatognathic system and can cause various effects such as damage to the temporomandibular joint (TMJ), the muscles, the periodontal and occlusion . Only recently it has emerged the interest of the study this phenomenon in children, proving it is a very frequent oral habits in childhood. This paper aims to describe the etiology through literature, the prevalence, diagnosis and conduct to be held against the parafunctional oral behaviors.

Dentist's role in recognizing child abuse: a case report / A importância do cirurgião dentista no diagnóstico de maus tratos em crianças: relato de caso

Purpose: To report the dentist's contribution in the identification, intervention and follow-up of a case of physical child abuse. Case description: A 5-year old child was brought by his stepmother to the Pediatric Dentistry Clinic of the Dental School of the State University of Paraiba, Brazil, for routine dental care. The physical examination revealed a hematoma in the left orbit. As the patient's report was inconsistent, he was referred to the Department of Psychology in order to obtain more information about the cause of the trauma and, if necessary, establish immediate protective measures for the child and plan the future actions for the case. Conclusion: This case illustrates the importance of an interdisciplinary approach for situations of violence involving children. Since physical violence can produce injuries in any part of the body, the dental staff must be prepared to identify any clinical evidence s well as to offer the adequate treatment for each case.

Objetivo: Relatar a contribuição do cirurgião-dentista na identificação, intervenção e encaminhamento frente a uma possível situação de abuso físico contra uma criança. Descrição do Caso: Uma criança de 5 anos de idade acompanhado de sua madrastra compareceu à Clínica de Odontopediatria da Faculdade de Odontologia da Universidade Estadual da Paraíba, Brazil, para avaliação e tratamento de rotina. Ao exame físico verificou-se a existência de um hematoma orbitário em seu rosto. Diante da inconsistência do relato da criança, optou-se por encaminhá-la à Clínica de Psicologia, visando resgatar a história passada do trauma. Conclusão: Este caso ilustra a importância do atendimento interdisciplinar e multiprofissional para situações de violência envolvendo crianças. Desde que as manifestações da violência física podem afetar qualquer parte do corpo, a equipe odontológica deve estar preparada para reconhecer e identificar as principais lesões, bem como proporcionar o atendimento odontológico adequado a cada caso.

Conceitos biológicos da resposta periodontal ao tracionamento dentário ortodôntico: revisão de literatura / Biologic concepts of the periodontal reply to orthodontic tooth movement: literatura review

As forças ortodônticas estimulam uma resposta biológica celular que é essencial para o movimento dentário e, consequentemente, para o remodelamento dos tecidos periodontais de suporte. Quando da realização de um tracionamento ortodôntico, é importante compreender a aplicação terapêutica de forças, avaliar a resposta biológica dos tecidos em relação às forças aplicadas e conhecer as possíveis indicações e contraindicações do tratamento. Nesse contexto, o presente trabalho visa esclarecer, através de uma revisão da literatura pertinente, as reações periodontais frente às forças ortodônticas, especialmente aquelas envolvidas no movimento de tração.

Orthodontic forces stimulates a biological cell response which is essential to dental movement and consequently to remodeling support periodontal tissues. When an orthodontic movement is required it is important to understand the therapeutic application of forces, to evaluate the biological response of tissues to the forces applied and to know the possible indications and contraindications of the treatment. In that context, this work aims to clarify, through a literature review, the periodontal reactions to orthodontics forces, especially those involved in the traction movement.

Chewing performance and bite force in children

The aim was to correlate the chewing performance and maximum bite force in children, considering the morphologic characteristics of occlusion and body mass index (BMI). Thirty-six children participated (19 girls and 17 boys, mean age 9.06 years). The occlusal characteristics were evaluated by intra-oral examination. Body weight (kg) and height (m) were assessed using a balance with anthropometrical scale, and BMI determined (kg/m2). For chewing performance the children chewed a round silicone tablet (5 mm thick and 15 mm in diameter, 1.2 g ±0.005 g) with 20 strokes. The particle sizes were analyzed by a software. The bite force was determined with a pressurized rubber tube connected to a sensor element. There was no difference between genders in all variables. Bite force correlated negatively with particles sizes (p<0.001), meaning that high bite forces implicated in better chewing performance, and was weakly correlated with BMI (r=0.410, p<0.05). Children with different molar and canine relationship did not show differences among the variables. It was concluded that chewing performance depended on the maximum bite force, but other factors like the number and area of occlusal contacts, the amount of lateral excursion during mastication and dentition phase also may play a role. The occlusal characteristics did not influence the chewing measurements, whereas body size had a relationship with bite force.

Formação expansiva mediastinal após angioplastia percutânea / Mediastinal mass after percutaneous transluminal coronary angioplasty

A descrição de relatos de caso tem o objetivo de mostraro os números diagnósticos possíveis numa determinada situação clínica, bem como o raciocínio e os métodos de investigação que foram utilizados pela equipe médica envolvida. Será discutido o diagnóstico de formação expansiva mediastinal que surgiu após angioplastia percutânea.

Instalação de implante com um estágio cirúrgico visando manutenção de estética gengival / Installation of implant with a one surgical time seeking maintenance of gengival aesthetic

O objetivo deste estudo foi analisar através de revisão de literatura e relato de 02 casos clínicos se, as vantagens que se anunciam nos casos de colocação dos implantes imediatamente após as extrações dentárias tais como, redução do tempo de tratamento, preservação da crista óssea, melhora do resultado estético gengival, melhor definição no posicionamento do implante a ser colocado, são reais e viáveis

Perimplantite: etiologia, diagnóstico e tratamento: uma revisão da literatura / Peri-Implantitis: etiology, diagnostic and treatment: a literature review

Diversos estudos indicam a contaminação bacteriana como sendo o agente etiológico da perimplantite, pelo acúmulo de biofilme dento-bacteriano ao redor dos implantes dentais. O objetivo deste estudo foi realizar uma revisão da literatura corrente bem discutir os mecanismos que contribuem para a instalação e perpetuação da infecção perimplantar

Implantes osseointegráveis com coroas provisórias imediatas / Immediate loading of crows in dental implants: a clinical report

A redução no tempo de instalação tem sido objeto de vários estudos com o objetivo de otimizar o tratamento, melhorar a aceitação por parte do paciente, diminuir custo do tratamento, bem como preservar estruturas peri-implantares. a instalação de coroas provisórias imediatas tem sido relatada com grande sucesso. O bojetivo do presente estudo foi realizar uma revisão bibliográfica acerca do tema, bem como relatar um caso clínico com acompanhamento de dois anos

Incidência e severidade da periodontite, e sua importância para a perda do elemento dentário, em uma amostra de militares de duas unidades do Exército brasileiro / Incidence and severety of periodontitis and its importance for loss teeth in population's profile from two military organizations of the Brazilian Army

O objetivo deste estudo foi analisar uma amostra de militares de duas unidades do Exército Brasileiro, a fim de se obter informaçäo sobre a incidência e severidade da periodontite e também, de se avaliar o perfil da amostra, com suas necessidades de tratamento odontológico. Foram examinados 236 pacientes, registrando-se a presença de dentes cariados, extraídos e obturados. Foram feitas mediçöes de profundidade de bolsa, recessäo gengival e consequentemente, nível de perda de inserçäo