The relining procedure of fiber posts with composite and the proper selection of luting resin cement are important for increasing bonding effectiveness in flared root canals.
Aim:The aim of the present study was to perform a histological analysis of the gingival mucosa in infant rats undergoing the teething process. Materials and methods:Eighteen Wistar rats between 8 and 15 days of life were distributed among three groups: group A-without teething; group B-eruption of incisors; and group C-eruption of incisors and molars. The samples included teeth and periodontal tissue from the region of the incisors and molars of each animal. Fragments were processed for histological analysis and submitted to immunohistochemical analysis. Results:In the 8-day-old rats, mild inflammatory infiltrate predominated with mononuclear cells in the pericoronal follicles of the incisors and molars. At 12 days of age, all animals exhibited moderate inflammation in the pericoronal follicles and epithelium of the incisors and mild inflammatory infiltrate with predominantly mononuclear cells in the molars. At 15 days of age, moderate neutrophilic exudate was found in the pericoronal follicles and epithelium of the incisors and molars. Immunohistochemical analysis revealed positivity for interleukin1b in the pericoronal follicles in the pre-eruption phase. Conclusion:An inflammatory reaction with progressive intensity occurs during the teething process, the response of which is preceded by the release of interleukin-1b.Clinical significance: Morphological proof of events that occur during teething that can affect the dynamics of the physiologic process manifesting as clinical symptoms.
166 IntroduçãoDurante a década de 70, o Streptococcus beta-hemolítico do grupo B (SGB) ou Streptococcus agalactiae emergiu como um dos principais agentes causadores de infecção neonatal no hemisfério norte, especialmente nos Estados Unidos 1 . Duas síndromes clínicas distintas foram reconhecidas: uma de início precoce, ocorrendo na primeira semana de vida, habitualmente se apresentando com falência respiratória e associada com eventos obstétricos como ruptura prolongada das membranas onfalomesentéricas, prematuridade e corioamnionite; a outra, de início tardio, entre uma e doze semanas de vida, se manifestando através de meningite, septicemia ou infecção focal 2 .As infecções focais correspondem a cerca de 20 -25% dos casos com síndrome tardia e, habitualmente, se manifestam sob a forma de pneumonia, osteomielite, artrite séptica, celulite e infecção do trato urinário.O presente relato trata de um recém-nascido a termo, com peso adequado para a idade gestacional, sem intercorrências ao nascimento, que apresentou osteomielite proximal de fêmur esquerdo e artrite séptica bilateral do quadril devido ao SGB. Tem como objetivos salientar a possibilidade da ocorrência de infecções focais tardias em recém-nascidos normais devido ao SGB em nosso meio e ratificar a absoluta necessidade de identificação do agente etiológico em tais casos para nortear com segurança a terapêutica antimicrobiana. Relato de CasoM.S.B., branco, masculino, 24 dias de vida, admitido no Instituto Fernandes Figueira com história de há duas semanas ter iniciado quadro progressivo de dificuldade de exten- ResumoOs autores descrevem um caso de osteoartrite neonatal do quadril por Streptococcus beta-hemolítico do Grupo B e discutem a importância do reconhecimento desta bactéria nas infecções focais tardias do recém-nascido.J. pediatr. (Rio J.). 1995; 71(3):166-168: recém-nascido, osteoartrite, streptococcus grupo B. AbstractThe authors describe a case of neonatal osteoarthritis of the hip due to group B streptococcus and discuss the importance of recognizing this bacteria in the late focal infections of the newborn.J. pediatr. (Rio J.). 1995; 71(3):166-168: newborn, osteoarthritis, group B streptococcus.
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