Abstract Objective: To identify the dental anomalies that can modify the occlusal characteristics and their distribution in these occlusal alterations in the skeletal patterns of children. Material and Methods: We analyzed charts, panoramic and periapical radiographs of children aged 5 to 12 years from 2009 to 2012. The facial pattern was evaluated through subjective face analysis and cephalometric data, as well as the occlusion of patients with and without (control) dental anomalies. The relationship between the presence of dental anomalies and malocclusion was analyzed by the Chi-square test with significance level of 5%. Results: 73 children (27.8%) presented dental anomalies, being 49.3% in girls and 50.7% in boys in a total of 88 teeth involved. Anomalies observed in decreasing order were: enamel hypoplasias, eruptive ectopias, agenesis, supernumerary teeth, corono-radicular dilaceration, microdontia, transposition and imperfect amelogenesis. Of these, 22.2% presented associated dental anomalies, whose ectopic eruption with enamel hypoplasia were the most frequently encountered. When comparing the control group with children with dental abnormalities it was observed a significant relationship between the presence of dental anomalies and malocclusion (p<0.05). The most frequent alteration among patients with dental anomalies was deep overbite (24.6%), followed by crowding (23.3%), posterior crossbite (14.2%), anterior open bite (12.9%) and anterior crossbite (0.3%). onclusion: Dental dysgenesis interferes with the development of occlusion and the resulting occlusal problems are distributed differently, taking into account the skeletal facial pattern in patients with and without dental anomalies.

AIM: To evaluate the bonding durability of materials used as sealants on different dentitions. METHODS: Deciduous (D) and permanent (P) molars were divided into four groups (n=5) and sealed with Fluroshield (F) and OptiBond FL (FL). Blocks of composite resin were built, stored in distilled water (24 h/37 °C), sectioned into 0.8 mm2 and tested at tensile (0.5 mm/min) after 24 h and 6 months. The fractures were observed and classified into adhesive, cohesive or mixed types. The data were analyzed using repeated measures ANOVA and Tukey test (α=5%), with tooth as the experimental unit. RESULTS: There were differences for dentition (p=0.0097), dental sealant (p=0.0019) and time (p=0.0001). At 24h the highest bond strength was observed for OptiBond FL on deciduous and permanent teeth, similar to Fluroshield at both dentitions. After 6 months the bond strength of OptiBond FL did not decrease in the permanent teeth, but decreased similar to Fluroshield in deciduous teeth, the bond strength of Fluroshield decreased similarly in both dentitions. CONCLUSIONS: The bond strength of dental sealants varied with the experimental conditions.

INTRODUÇÃO: a expansão da maxila induz a formação de novo osso na sutura palatina mediana por um processo de proliferação e diferenciação celular. A força de expansão pode estimular, nas células progenitoras, a produção de citocinas com atividade osteoindutiva, tais como o transforming growth factor β1(TGFβ1). OBJETIVOS: o principal objetivo deste estudo foi determinar a função dessa citocina nos estágios iniciais de expansão da sutura palatina mediana. MÉTODOS: um aparelho ortodôntico foi instalado entre os molares superiores direito e esquerdo de ratos com 4 semanas de idade. A força de expansão inicial foi de 50g. Os grupos controle e experimental foram sacrificados nos dias 0, 2 e 5. Cortes bucais de 6µm foram obtidos e sujeitos à técnica de hibridização in-situ. RESULTADOS: dois dias após a aplicação de força, as células osteocondroprogenitoras, distribuídas no lado interno do tecido cartilaginoso, exibiram altos níveis de transcrição de transforming growth factor β1. No dia 5, o nível de transcrição de TGFβ1 foi observado nos osteócitos e nas células osteoblásticas, na superfície do novo osso. A atividade osteoblástica foi confirmada por meio de um estudo imunohistoquímico utilizando-se Osteocalcina-Pro (OC-Pro). CONCLUSÕES: os dados sugerem que a expansão da sutura palatina induz a diferenciação de células osteocondroprogenitoras em osteoblastos, estimuladas pela produção de citocinas

INTRODUCTION: The application of an orthodontic expansion force induces bone formation at the midpalatal suture because of cell proliferation and differentiation. Expansion forces may stimulate the production of osteoinductive cytokines, such as transforming growth factor β1 (TGFβ1), in the progenitor cells. OBJECTIVES: This study determined the role of TGFβ1 in the early stage of midpalatal suture cartilage expansion. METHODS: A rectangular orthodontic appliance was placed between the right and left upper molars of 4-week-old rats. The initial expansion force was 50 g. Animals in the control and experimental groups were sacrified on days 0, 2, and 5 and 6 µmm thick sections were prepared for an in situ hybridization technique. RESULTS: Two days after the application of force, prechondroblastic and undifferentiated mesenchymal cells distributed along the inner side of the cartilaginous tissue had high levels of TGFβ1 transcription. On day 5, the TGFβ1 transcription was found in osteocytes and osteoblastic cells on the surface of newly formed bone. Immunohistochemistry using Osteocalcin-Pro (OC-Pro) confirmed osteoblastic activity. Conclusions: Results suggest that the expansion of midpalatal suture cartilage induces differentiation of osteochondroprogenitor cells into osteoblasts after stimulation by cytokine production

O objetivo do trabalho foi comparar o índice de cárie (ceo), presença de hábitos de sucção e alterações faciais em crianças atendidas no programa de atendimento preventivo a bebês, com crianças atendidas por demanda espontânea, na mesma idade, no serviço público de Maringá-PR. Foram avaliadas 100 crianças (1-5 anos), divididas em 2 grupos: GI-crianças atendidas no programa de bebês com atendimento educativo-preventivo e retornos bimestrais, desde o 1º ano de vida; GII-crianças atendidas para tratamento convencional (preventivo e curativo) de acordo com a necessidade, sendo o retorno responsabilidade dos familiares. A coleta dos dados foi realizada por meio de entrevista com os pais e através de exame clínico, para avaliação do ceo e alterações faciais. A análise dos dados (Teste de Mann-Whitney para comparações de ceo e teste qui-quadrado para todas outras comparações) mostrou diferença significante (p<0,05) em relação ao índice ceo (GI: 0,2; GII:3,0), componente livre de cárie (GI:88%; GII:57%) e hábitos de sucção não nutritiva (GI:47%; GII:75%). As práticas de amamentação e uso da mamadeira foram semelhantes nos grupos. Constatou-se maior presença de alterações faciais (p<0,05) no GII (48%) do que no GI (8,4%), destacando-se as variáveis (p<0,05) palato ogival (GI: 10,2%; GII:35,4%), mordida aberta anterior (GI:14,2%; GII:35,4%) e respiração bucal (GI: 6,1%; GII: 29,1%). Concluiu-se que o programa de atendimento a bebês é mais efetivo que o atendimento de demanda espontânea, cumprindo o objetivo de manutenção da saúde bucal na população infantil.

This study compared the caries index (dmft), presence of sucking habits and facial alterations in children attended by the preventive program for infants and children assisted by spontaneous demand, at the same age, at the public sector of Maringá, PR. A total of 100 children were evaluated (1-6 years), who were divided into 2 groups: GI - children attended by the infant program with educational and preventive care and bimonthly follow-up, since the 1st year of age; GII - children assisted for conventional treatment (preventive and restorative) according to the needs, and follow-up as requested by the parents. Data collection was performed by interview with the parents and clinical examination for evaluation of the dmft and facial alterations. Analysis of data (Mann-Whitney test for dmft comparison and chi-square test for all other comparisons) demonstrated a significant difference (p<0.05) in relation to the dmft index (GI: 0.2; GII: 3.0), percentage of caries-free children (GI: 88%; GII: 57%) and non-nutritive sucking habits (GI: 47%; GII: 75%). The breastfeeding and bottle utilization practices were similar for both groups. Facial alterations were more frequently observed (p<0.05) in GII (48%) than GI (8.4%), especially for the variables (p<0.05) high arched palate (GI: 10.2%; GII: 35.4%), anterior open bite (GI: 14.2%; GII: 35.4%) and mouth breathing (GI: 6.1%; GII: 29.1%). It was concluded that the infant program is more effective than the spontaneous demand program, reaching the goal of oral health maintenance in the child population.