IntroduçãoCistos odontogênicos são definidos como cistos que surgem a partir do epitélio odontogênico e ocorrem nas regiões entre dentes e ossos maxilares. A proliferação e/ou degeneração do epitélio leva ao desenvolvimento dessa condição 1 . A frequência de cistos odontogênicos em crianças é relativamente baixa 2 . Um dos tipos mais comuns desses cistos são os cistos dentígeros, representando 24% de todas as lesões na população em geral 3 . Foi estimado que entre 4% a 9% dos cistos dentígeros ocorrem na primeira década de vida 4,5 . A patogênese desse cisto é desconhecida, mas, aparentemente, ele se desenvolve pelo acúmulo de líquido entre o epitélio reduzido do orgão do esmalte e a coroa do dente. O cisto de erupção é análogo ao cisto dentígero no tecido mole. Desenvolve-se como resultado da separação do folículo dentário que envolve a coroa de um dente em erupção 6 , provocando um bloqueio da microinfiltração regional que ocorre pela mucosa gengival e o dente não irrompido 7 . Clinicamente, os cistos de erupção apresentam-se como uma tumefação mole que pode conter apenas líquido (aparência translúcida azulada) ou também pigmento hemoglobínico (aparência de hematoma). Assim, se houver um traumatismo na superfície dos cistos, levando à presença de sangue no interior da
The present study aimed to determine the prevalence of dental pain during pregnancy and its association with sociodemographic factors and oral health conditions among 315 pregnant women in South Brazil. Participants were interviewed to obtain sociodemographic data, such as age, educational level, employment status, family income, and marital and parity status. Medical and dental histories were also collected, including the occurrence of dental pain and the use of dental services during pregnancy. Clinical examinations were performed to assess the presence of visible plaque and gingival bleeding and to calculate the decayed, missing, and filled teeth index. Means and standard deviations of continuous variables and frequencies and percentages of categorical variables were calculated. Independent variables were included in a multivariate logistic regression analysis. A total of 173 (54.9 %) pregnant women reported dental pain during pregnancy. After adjustment of the analysis, caries activity remained the main determinant of dental pain (odds ratio 3.33, 95 % CI 1.67-6.65). The prevalence of dental pain during pregnancy was high and the presence of caries activity was a determinant of dental pain. Moreover, access to oral health care was low, despite pregnant women's increased need for dental assistance.
This study evaluated the influence of the addition of cetrimide and polypropylene glycol to sodium hypochlorite (NaOCl) on its capacity to dissolve pulp tissue. Bovine pulp fragments with standardized weight and volume were immersed for 5, 15 and 30 min in 2 mL of NaOCl and Hypoclean (NaOCl added with cetrimide and polypropylene glycol) solutions at 5.25%, 2.5%, 1%, 0.5% and 0.25% and afterwards re-weighted. Distilled water was used as a control. The percentage of tissue loss was considered for statistical analysis (univariate ANOVA, SPSS, v. 17.0) at 5% significance level. There was no tissue dissolution in the control group. NaOCl added with surfactants (Hypoclean) dissolved more pulp tissue (p<0.05) than NaOCl alone. Tissue dissolution was directly dependent on the concentration of solutions (p<0.05), and also on the time range (p<0.05). The combination of NaOCl at high and low concentrations with the surfactants cetrimide and polypropylene glycol increased significantly its capacity to dissolve pulp tissue.
This study assessed the pH, radiopacity, antimicrobial effect, cytotoxicity and biocompatibility of endodontic filling materials for primary teeth. Zinc oxide eugenol (ZOE), Vitapex and Calen paste thickened with zinc oxide (ZO) were evaluated in comparison to an experimental MTA-based material. Radiopacity was tested using a graduated aluminum stepwedge with a digital sensor (n=5). The materials pH was recorded at 1, 4, 12 h; 1, 3, 7, 15 and 30 days (n=5). Direct contact test was used to assess the antimicrobial efficacy against Enterococcus faecalis after 1, 4, 12, 24 h (n=5). Cytotoxicity assay used MTT test for cell viability after incubation for 1, 3 and 7 days (n=5). For biocompatibility test, Wistar rats had received implants containing each material (n=5). The biopsied tissues were histologically analyzed after 15, 30 and 60 days. The results of radiopacity, pH, antimicrobial capacity and cytotoxicity were analyzed using ANOVA and Tukey tests. The histological data were submitted to Kruskal-Wallis test. The experimental material presented the lowest radiopacity (3.28 mm Al) and had a pH>12.0 throughout the test period. The experimental material showed the highest antibacterial effect, killing over 99.97% bacteria in 4 h. Vitapex presented the highest cell viability. Initially, biocompatibility test showed moderate to severe inflammation in all groups. After 60 days, Calen+ZO group showed moderate inflammation, while the others showed predominantly mild inflammatory reaction. The present results demonstrated that the experimental MTA-based material exhibited satisfactory behavior regarding the studied properties. Additional in vivo studies are necessary for a better evaluation of the material.
Physicochemical and Biological Evaluation of Endodontic Filling M a t e r i a l s f o r P r i m a r y Te e t h
Atitudes e conhecimento dos pais quanto ao uso de dentifrícios fluoretados em crianças de um a 65 meses de idade Attitudes and knowledge of parents regarding the use of fluoride dentifrices in children aged one to sixty-five months
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