Abstract This study assessed fluoride (F) and sodium trimetaphosphate (TMP) release into artificial saliva from varnishes containing 0%, 2.5%, and 5% NaF, supplemented or not with 5% TMP. The varnishes were applied on polyester sheets (n = 8/group), and F and TMP released into artificial saliva were measured for up to 24 hours. The amount of F and TMP released were directly related to NaF and TMP concentrations in the varnishes. The highest F release was seen for 5% NaF and 5% NaF + 5% TMP, whereas 5% TMP released the highest amount of TMP. However, the simultaneous addition of NaF and TMP to varnishes significantly reduced the amount of F and TMP released from the products.

OBJETIVO: Analisar a associação do tempo de aleitamento materno na instalação de hábitos de sucção não nutritiva em crianças atendidas na Bebê Clínica da Faculdade de Odontologia de Araçatuba da Universidade Estadual Paulista Júlio de Mesquita Filho. MÉTODOS: Foram realizadas entrevistas com os pais/responsáveis de 228 crianças, com o objetivo de obter informações sobre o período da amamentação natural, presença de hábito de sucção não nutritiva e duração do hábito. A análise dos resultados foi realizada de maneira descritiva. RESULTADOS: Verificou-se que 42,5% das mães amamentaram seus filhos até os 6 meses, sendo que o aleitamento materno exclusivo foi observado em apenas 13% da amostra. Dentre as crianças que receberam amamentação natural por período superior a 6 meses, apenas 32,8% tiveram hábito de sucção não nutritiva e 67,2% não apresentaram esse hábito. CONCLUSÃO: Houve associação entre o tempo de aleitamento natural e a aquisição de hábitos de sucção não nutritiva. Observou-se alta prevalência de hábito de sucção de chupeta nos bebês que tiveram o aleitamento materno apenas nos seis primeiros meses de vida. Todas as crianças que tiveram aleitamento materno até os seis meses de idade fizeram o uso de mamadeira como complementação alimentar, mostrando que ainda há grande frequência do uso de mamadeira.

OBJECTIVE: To analyze the association of maternal breastfeeding time with the introduction of non-nutritive sucking habits in children attending the Baby Clinic at the Araçatuba College of Dentistry, Universidade Estadual Paulista Júlio de Mesquita. METHODS: Interviews were conducted with the parents/legal guardians of 228 children, with the aim of obtaining information about the period of natural breastfeeding, the presence of non-nutritive sucking habits and the duration of the habit. A descriptive analysis of the results was performed. RESULTS: It was found that 42.5% of mothers nursed their children up to 6 months, and exclusive maternal breastfeeding was observed in just 13% of the sample. Amongst the children who were naturally breastfed for a period of more than 6 months, only 32.8% had non-nutritive sucking habits while 67.2% did not. CONCLUSION: There was an association between the length of natural breastfeeding and acquiring non-nutritive sucking habits. The habit of sucking on a pacifier was extremely prevalent in babies that only received maternal breastfeeding in the first six months of life. All of the children that were breastfed for only six months made use of a feeding bottle to complement their diet, showing that feeding bottles are still frequently used.

OBJECTIVE: The aim of this study was to investigate the effects of mineral trioxide aggregate (MTA), Sealapex, and a combination of Sealapex and MTA (Sealapex Plus) on the reaction of subcutaneous connective tissue of rats, and on cell viability and cytokine production in mouse fibroblasts. MATERIAL AND METHODS: The tissue reaction was carried out with dentin tubes containing the materials implanted in the dorsal connective tissue of rats. The histological analysis was performed after 7 and 30 days. Millipore culture plate inserts with polyethylene tubes filled with materials were placed into 24-well cell culture plates with mouse fibroblasts to evaluate the cell viability by MTT assay. ELISA assays were also performed after 24 h of exposure of the mouse fibroblasts to set material disks. RESULTS: Histopathologic examination showed Von Kossa-positive granules that were birefringent to polarized light for all the studied materials at the tube openings. No material inhibited the cell viability in the in vitro test. It was detected IL-6 production in all root-end filling materials. MTA and Sealapex Plus induced a slight raise of mean levels of IL-1β. CONCLUSIONS: The results suggest that Sealapex Plus is biocompatible and stimulates the mineralization of the tissue.

O objetivo de encontrar um material ideal para obturar canais radiculares de dentes decíduos ainda não foi alcançado. Esse fato estimulou a realização de uma experimentação para analisar histologicamente a reação dos tecidos periapicais a 3 materiais obturadores de canal. Assim, oitenta canais radiculares de dentes decíduos anteriores de 6 cães, com 60 dias de idade, fora empregados neste estudo. Após o preparo biomecânico, os canais radiculares foram obturados com os seguintes materiais: pasta lentamente reabsorvível de Maisto, Sealer 26 com iodofórmio, pasta L&C (hidróxido de cálcio com óleo de oliva) e, como grupo controle, dentes cujos canais foram preparados biomecanicamente mas não obturados. Trinta dias após o tratamento os animais foram mortos e as peças processados para análise histológica. Os resultados permitiram ordenar estatisticamente os materiais do melhor para o pior da seguinte maneira: a- Pasta de Maisto, b- Sealer 26 com iodofórmio, c- grupo controle, d- Pasta L&C. Foi observado diferença significante (p=0,01) somente quando os resultados dos diferentes grupos foram comparados com o grupo da pasta L&C. Foi também observado que a pasta L&C não foi biologicamente compatível enquanto os outros materiais foram biocompatíveis, porém suas velocidades de reabsorção não foram a mesma observada com as raízes dos dentes decíduos.

The problem of finding an ideal material for filling root canals of deciduous teeth has not been solved yet. This fact led to the development of an experiment to histologically analyze the periapical tissue reaction to 3 root canal filling materials. Eighty root canals of dog deciduous anterior teeth from 6 animals, 60 days old, were used in this study. After biomechanical preparation, the root canals were filled with the following materials: slowly resorbable Maisto paste, Sealer 26 with iodoform, L&C paste (calcium hydroxide with olive oil) and as a control group, canals that were prepared but not filled. At thirty days after the treatment the animals were killed and the teeth prepared for histological analysis. The materials were ranked statistically from the best to the worst as follows: a - Maisto paste, b - Sealer 26 with iodoform, c - control group, d - L&C paste. There was significant difference (p = 0.01) only when the results of the other groups were compared with the L&C paste group. It was also observed that L&C paste was not biologically compatible and that the other materials were biocompatible but their resorption was not at the same rate as that of the deciduous teeth roots.