Comparative Molecular Analysis of Gram-Negative Bacteria in Primary Teeth with Irreversible Pulpitis or Periapical Pathology.

Purpose: The purpose of this study was to compare the Gram-negative pathogens identified in the root canals of primary teeth with irreversible inflammatory pulpitis and in teeth showing apical periodontitis. Methods: Samples were collected from 123 root canals of primary teeth from three- to seven-year-old patients. Root canals were assigned to either group one (irreversible inflammatory pulpitis; n equals 63) or group two (pulp necrosis and apical periodontitis; n equals 60). Total number of cells of selected Gram-negative microorganisms was determined by the checkerboard DNA-DNA hybridization technique. Demographic data were compared using either chi-squared or t tests. Total numbers of microorganisms were compared using the Mann-Whitney test (α equals 0.05). Results: There were no significant intergroup differences in gender, age, and tooth group distribution (P>0.05). Among the 123 samples, 17 were discarded due to salivary contamination. The total numbers of Prevotella nigrescens, Treponema denticola, Fusobacterium nucleatum polymorphum, Fusobacterium nucleatum spp nucleatum, Aggregatibacter actinomycetemcomitans serotype a, Aggregatibacter actinomycetemcomitans serotype b, Porphyromonas gingivalis, Prevotella intermedia, and Prevotella melaninogenica were higher in teeth with apical periodontitis compared to those with irreversible inflammatory pulpitis (P<0.05). Conclusion: Higher numbers of Gram-negative bacteria were found in teeth with apical periodontitis compared to teeth with irreversible in- flammatory pulpitis.

The Dynamics of Subcutaneous Tissue Response to Microorganisms Associated with the Extract of Araçá (Psidium cattleianum): An Edemogenic and Microscopic Analysis / A Dinâmica da Resposta do Tecido Subcutâneo para Associação de Microorganismos com o Extrato de Araçá (Psidium cattleianum): Uma Análise Microscópica e Edemogênica

Objective: To evaluate in vivo tissue reaction to the extract of araçá (Psidium cattleianum) associated with inactivated microorganisms. Material and Methods: A 0.1 mL suspension was used containing Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Enterococcus faecalis, Peptostreptococcus micros, and Porphyromonas endodontalis, which were inactivated by heat and mixed into a 1.0 mL saline (control group), an aqueous solution, or a hydroalcoholic extract of araçá. Eighteen male rats (Rattus norvegiccus) under general anesthesia received 0.2 mL of 1% intravenous Evans blue. Thirty minutes later, 0.1 mL of one of the associations was injected into the animals' dorsal region. The animals were euthanized after 3 and 6 hours, and the materials obtained were placed in formamide for 72 hours then analyzed in a spectrophotometer (λ=630 ηm). For the morphological analysis, 30 rats received polyethylene tubes implants with the extracts or the saline with the associations in the dorsal region and euthanized after 7 and 30 days to be analyzed according to an inflammation cell score. Results: No significant difference (p>0.05) was observed in the edema among groups. The optical microscopy results showed a repair in the 30-day-period, which was higher when compared to the 7-day-period (p< 0.0001). Nevertheless, in the 7-day-period, the hydroalcoholic extract presented a significant response compared to the aqueous extract (p=0.05) and a trend for better results than the control group. Conclusion: The aqueous and hydroalcoholic araçá extracts associated with inactivated microorganisms showed similar responses to control, indicating no interference on the toxic effects of the bacterial components in tissue repair. (AU)

Objetivo: Avaliar in vivo a reação tecidual do extrato de araçá (Psidium cattleianum) associado com microorganismos inativados. Material e Métodos: Uma suspensão de 0.1mL foi usada contendo Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum, Enterococcus faecalis, Peptostreptococcus micros e Porphyromonas endodontalis dos quais foram inativos por aquecimento e misturados a 1,0 mL de soro fisiológico (grupo controle), uma solução aquosa ou hidroalcoólica de araçá. Dezoito ratos machos (Rattus norvegiccus) sob anestesia geral receberam 0,2mL de Azul de Evans a 1% intravenoso. Após trinta minutos, 0,1mL de um dos extratos (associado com microorganismos inativos) foi injetado nos animais na região dorsal. Os animais foram eutanasiados após 3 e 6 horas, e os materiais obtidos colocados em formamida por 72 horas para análise em espectrofotômetro (λ=630 ηm). Para análise morfológica, 30 ratos receberam implante subcutâneo de tubo de polietileno com as associações na região dorsal, eutanasiados após 7 e 30 dias para serem analisados de acordo com um escore de células inflamatórias. Resultados: Não houve diferença significativa (p>0,05) no edema entre os grupos. Os resultados obtidos em microscópio óptico apontaram reparo em 30 dias superior ao de 7 dias (p< 0,0001). No período de 7 dias a solução hidroalcoólica apresentou resposta superior a solução aquosa (p=0,05) e uma tendência de melhor resultado que o controle. Conclusão: A solução aquosa e hidroalcoólica de extrato de araçá associadas a microrganismos inativados apresentaram respostas biológicas semelhantes ao controle, indicando que não há interferência sobre os efeitos tóxicos advindos dos componentes bacterianos, no sentido de favorecer o reparo(AU)

Evaluation of tissue reaction to Aroeira (Myracrodruon urundeuva) extracts: a histologic and edemogenic study.

OBJECTIVES: This study evaluated subcutaneous tissue response to Aroeira (Myracrodruon urundeuva) extract employing edemogenic and histological analyses. MATERIAL AND METHODS: Test groups consisted of aqueous and ethanolic Aroeira extracts and saline (control). For edema quantification, 18 rats received an intravenous injection of Evan's Blue. After 30 min, the extracts and saline were injected on the dorsum of the rats, which were then sacrificed after 3 and 6 h. Readings were performed in a spectrophotometer. For subcutaneous implantation, 30 rats received a polyethylene tube containing the extracts on their dorsum and then they were killed after 7 and 28 days. The samples were processed for histological analysis and evaluated with a light microscope. The inflammatory infiltrate was quantified. RESULTS: There were no statistically significant differences between aqueous extract and saline groups in relation to edema quantification in the different periods (p>0.05). Ethanolic solution resulted in more edema independently of the experimental period (p<0.05). Histological analysis showed similar results on the 7-day period for the 3 groups. There was a notable reduction on inflammatory cell number for saline and aqueous extract groups at 28 days. CONCLUSION: The aqueous extract showed biocompatible properties similar to those of saline.

Evaluation of tissue reaction to Aroeira (Myracrodruon urundeuva) extracts: a histologic and edemogenic study

OBJECTIVES: This study evaluated subcutaneous tissue response to Aroeira (Myracrodruon urundeuva) extract employing edemogenic and histological analyses. MATERIAL AND METHODS: Test groups consisted of aqueous and ethanolic Aroeira extracts and saline (control). For edema quantification, 18 rats received an intravenous injection of Evan's Blue. After 30 min, the extracts and saline were injected on the dorsum of the rats, which were then sacrificed after 3 and 6 h. Readings were performed in a spectrophotometer. For subcutaneous implantation, 30 rats received a polyethylene tube containing the extracts on their dorsum and then they were killed after 7 and 28 days. The samples were processed for histological analysis and evaluated with a light microscope. The inflammatory infiltrate was quantified. RESULTS: There were no statistically significant differences between aqueous extract and saline groups in relation to edema quantification in the different periods (p>0.05). Ethanolic solution resulted in more edema independently of the experimental period (p<0.05). Histological analysis showed similar results on the 7-day period for the 3 groups. There was a notable reduction on inflammatory cell number for saline and aqueous extract groups at 28 days. CONCLUSION: The aqueous extract showed biocompatible properties similar to those of saline.

Escovação dental em pacientes com desordens neurológicas e motoras / Toothbrushing in patients with neurological and / or motor disorders

O objetivo deste estudo foi identificar as caracterísiticas e dificuldades encontradas por pais o de / cuidadores durante a realização da escovação dental em pacientes com desordens neurológicas e motoras. Foi aplicado um questionário a 40 pais / cuidadores de pacientes especiais, com idade de 3 a 32 anos, os quais estavam em atendimento na Faculdade de Odontologia de Ribeirão Prêto da Universidade de São Paulo. Os dados obtidos foram avaliados por meio de análise estatística descritiva. Foi observado que as mães foram as principais responsáveis pela higienização bucal dos pacientes especiais, realizada 3 vezes ao dia, na pia do banheiro. Todos os pais relataram dificuldades durante a escovação dental, incluindo a inabilidade do paciente para cuspir e enxaguar a boca, dificuldade para manter a boca aberta durante o procedimento, presença de movimentos voluntários e involuntário e reflexo de vômito constante. Estas dificuldades reportadas pelos cuidadores indicam a necessidade de treinamento para realizar a higiene bucal em pacientes especiais com o objetivo de melhorar a qualidade de vida desses indivíduos.

The purpose of this questionnaire-based study was to identify the characteristics and difficulties in undertaking toothbrushing in special needs patients with neurological and / or motor disorders. A questionnaire addressing aspects of the patients' oral homecare was applied to 40 caregivers of special needs patients aged 3-32 years who were undergoing dental treatment. Data were analyzed by descriptive statistics. Mothers were most often reported as the person in charge of performing toothbrushing, which was usually performed three times a day at the bathroom sink. All respondents mentioned difficulties during toothbrushing, including the patients' inability to rinse the mouth and spit, their inability to open the mouth and keep it open during brushing, the presence of voluntary and involuntary movements, and vomiting reflexes. These difficulties reported by guardians further indicate that guardians need to be trained for performing oral hygiene in special care patients in order to improve the quality of life for these patients.

Gingivitis severa asociada a factor local en odontopediatría: reporte de caso clínico / Severe gingivitis associated with local factor in pediatric dentistry: case report

La gingivitis es una enfermedad que no está limitada a la población adulta, ella afecta más del 70% de los niños mayores de siete años de edad. Se caracteriza por la inflamación de la encía marginal sin pérdida de inserción, ni pérdida ósea detectable. La manifestación más prevalente es la gingivitis inducida por la placa dental que puede presentarse de forma severa, con intensa inflamación gingival, edema y sangramiento, interfiriendo en la alimentación y la vida social del niño. El objetivo del presente estudio es presentar el caso clínico de un paciente del género masculino, de 11 años de edad, portador de un cuadro severo de gingivitis crónica inducida por placa, agravado por factor local y asociado con herencia familiar. El paciente fue controlado por 1 año y medio y el resultado del tratamiento fue satisfactorio, con regresión del cuadro inflamatorio gingival y motivación del paciente y de los padres para la ejecución de una correcta y frecuente técnica de higiene bucal, garantizando así el mantenimiento del éxito alcanzado con el tratamiento implementado

Conservative management of severe intrusion in a primary tooth: a 4-year follow-up.

The purpose of this report was to describe the case of an 18-month-old boy who was referred to the pediatric clinic of the School of Dentistry of Araçatuba, São Paulo State University, Araçatuba, São Paulo, Brazil, 3 days after sustaining severe trauma that led to the complete intrusion of the primary maxillary right lateral incisor, a crown fracture of the primary maxillary right central incisor without pulp involvement, and disruption of the superior labial frenum. Four months later, spontaneous re-eruption was observed in the intruded tooth and no endodontic intervention was necessary in either traumatized teeth. Four years after the trauma, a morphological change in the germ of the permanent successor was noted. Clinical follow-up and periodic radiographies are necessary after traumatic intrusion of primary teeth to monitor possible sequelae in the permanent successors.

Prevalence of dental trauma in patients with cerebral palsy.

This study presents the findings of a record review that evaluated the prevalence of dental trauma in patients with cerebral palsy and evaluated its possible relationship with age, type of palsy, and epilepsy. The dental records of 2,200 patients with special needs admitted to the special care clinic of the School of Dentistry of Araçatuba/UNESP, Brazil, between 1998 and 2003 were reviewed. Of the records that were analyzed, 500 patients who had cerebral palsy were selected for this study. Information regarding age, gender, type of palsy and dental trauma was collected and statistically analyzed. It was observed that 10.6% of the subjects (n = 53) had sustained dental trauma. The number of traumatized teeth was 84. Enamel or enamel/dentin fractures were the most frequent types of traumatic injury (84.9%). The permanent maxillary central incisors were the most commonly affected teeth (50%). The frequency of traumatic injuries showed no significant correlation (p> .05) with the type of cerebral palsy or gender and they were more frequent in subjects between the ages of 0 and 12 years. Having epilepsy was not a statistically significant risk factor (p> .05) for dental trauma.

Avaliação da resposta tecidual em ratos, a microrganismos anaeróbios e facultativos inativados associados a soluções preparadas com extratos vegetais aquoso e hidroalcoólico de Araçá (Psidium cattleianum): análise edemogênica e microscópica / Evaluation of the tissue answer in mice the inactivated anaerobic and facultative microorganisms associated the solutions prepared with watery vegetable and hydro alcoholic extract of araça (Psidium cattleianum): edemogenic and morphological analysis

O objetivo do presente estudo foi avaliar, in vivo, a resposta biológica imediata e tardia de soluções aquosa e hidroalcoólica preparadas com extrato vegetal de Araçá (Psidium cattleianum) associadas a microrganismos inativados. O controle utilizado foi soro fisiológico associado aos microrganismos inativados. Foi utilizado 0,1ml de uma suspensão contendo Porphyromonas gingivalis ATCC 33277, Prevotella intermedia ATCC 25611, Fusobacterium nucleatum ATCC 25586, Enterococcus faecalis ATCC 29212, Peptostreptococcus micros ATCC 33270 e Porphyromonas endodontalis ATCC 35406 inativados por calor, a qual foi misturada a 1ml de soro fisiológico ou solução aquosa ou hidroalcoólica de araçá. Para a análise edemogênica (resposta imediata), foram utilizados 18 ratos machos (Rattus norvegicus). Sob anestesia geral, os animais receberam injeção intravenosa de azul de Evans a 1%. Após 30 minutos, foi injetado 0,1ml da mistura de uma das soluções ou soro (associados aos microrganismos inativados), na região subcutânea dorsal. Os animais foram sacrificados após 3 e 6 horas e as peças obtidas colocadas em formamida por 72 horas. A leitura da análise edemogênica foi realizada em espectrofotômetro com comprimento de onda de 630ηm. Para a análise microscópica (resposta tardia), tubos de polietileno contendo as soluções ou soro fisiológico acrescidos da solução de microrganismos inativados foram implantados na região dorsal de 30 ratos machos, que foram mortos após 7 e 30 dias. Não foi observada diferença significante (p>0,05) na quantidade de edema dos diferentes grupos nos tempos pós-operatórios. Os resultados obtidos pela leitura das lâminas em microscópio óptico apontaram reparo no período de 30 dias significativamente superior ao de 7 dias (p<0,0001). No período de 7 dias a solução hidroalcoólica apresentou resposta significativamente superior a solução aquosa (p+0,05) e uma tendência de melhor resultado que o controle. Pôde-se concluir que as soluções aquosa e hidroalcoólica...

Assessment of the microbiota in root canals of human primary teeth by checkerboard DNA-DNA hybridization.

PURPOSE: The purpose of this study was to evaluate in vivo the prevalence of microorganisms in root canals of human primary teeth, by checkerboard DNA-DNA hybridization. METHODS: Fifty-five root canals of primary teeth with irreversible pulpitis (group 1) and 51 root canals of teeth with pulp necrosis and apical periodontitis (group 2) were selected. Microbiological samples were collected and submitted to checkerboard DNA-DNA hybridization using 34 genomic DNA probes. The results were analyzed statistically by Mann-Whitney U-test at a 5% significance level. RESULTS: The most prevalent species in group 1 were: (1) Campylobacter rectus (87%); (2) Gemella morbilorum (78%); (3) Streptococcus gordonii (71%); (4) Capnocytophaga ochracea (69%); (5) Treponema denticola (58%); and (6) Streptococcus intermedius (49%). The most prevalent species in group 2 were: (1) C. rectus (90%); (2) T. denticola (88%); (3) S. intermedius (77%); (4) G. morbilorum (73%); (5) Streptococcus oralis (67%); (6) C. ochracea (63%); (7) S. gordonii (55%); (8) Streptococcus mitis (51%); and (9) Leptotrichia buccalis (51%). Except for Peptostreptococcus micros and Actinomyces israelii, the most prevalent bacterial strains in the root canals with apical periodontitis were also those found in larger numbers (P<.05). Groups 1 and 2 differed significantly (P<.05) regarding the total number of bacterial cells detected in the root canal samples, with group 2 showing remarkably larger bacterial cell numbers. CONCLUSIONS: Root canals of primary teeth have a great bacterial diversity, characterizing a polymicrobial endodontic infection with presence of: (1) anaerobic and facultative micro organisms; (2) black-pigmented rods; and (3) streptococci. A large number of anaerobic species were detected in teeth with necrotic pulp and apical periodontitis, and a significantly smaller number of bacterial cells were found in teeth with irreversible pulpitis.

Sotos syndrome: a case report.

Sotos Syndrome is a genetic condition characterized by accelerated bone development, abnormal craniofacial morphology and psychomotor developmental retardation. The behavioral problems usually associated with the syndrome include poor social skills, anxiety and/or irritability. Oral findings include prognathism and a high-arched palate with premature eruption of the teeth. Delayed psychomotor development increases the risk for caries. A personalized preventive treatment plan with close supervision of the patient's oral health care is required. This paper documents a child diagnosed with Sotos Syndrome and describes the primary clinical features, the disease-specific craniofacial, oral and dental findings, and dental care management of this patient.