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Objectives To evaluate whether the success of miniscrew-assisted rapid palatal expansion (MARPE), performed in patients with advanced bone maturation is related to factors such as midpalatal suture (MPS) maturation, age, sex, or bicortical mini-implant anchorage. Materials and Methods Twenty-eight cone beam computed tomography (CBCT) scans of adults and post-pubertal adolescents treated by MARPE were included in the sample. CBCT images before (T0) and after expansion (T1) were used to evaluate the skeletal changes and the success or failure of MARPE. Axial images of MPS were extracted from T0 and classified into one of the five maturation stages. The correlation between MARPE success and the factors of age, sex, MPS maturation, and bicortical mini-implant anchorage was investigated. Results Only the age showed a statistically significant negative correlation with MARPE success and all the skeletal measures. There was an 83.3% success rate among individuals aged 15 to 19 years, 81.8% from 20 to 29 years, and 20% from 30 to 37 years. MPS maturation showed a negative correlation with the expansion effect. Subjects with stages B or C of MPS maturation showed a 100% success rate, followed by stage D (62.5%) and stage E (58.3%). Conclusions As age increased, there was a decrease in MARPE success and the skeletal effects of maxillary expansion. Sex and bicortical mini-implant anchorage were not shown to be relevant factors. There was no correlation between MPS maturation and MARPE success; however, it was observed that all cases of MARPE failure were classified as stage D or E of MPS maturation.

ObjectiveThe aim of this in vitro study was to analyze color stability of monocrystalline and polycrystalline ceramic brackets after immersion in dye solutions.MethodsSeven ceramic brackets of four commercial brands were tested: Two monocrystalline and two polycrystalline. The brackets were immersed in four dye solutions (coffee, red wine, Coke and black tea) and in artificial saliva for the following times: 24 hours, 7, 14 and 21 days, respectively. Color changes were measured by a spectrophotometer. Data were assessed by Multivariate Profile Analysis, Analysis of Variance (ANOVA) and Multiple Comparison Tests of means.ResultsThere was a perceptible change of color in all ceramic brackets immersed in coffee (ΔE* Allure = 7.61, Inspire Ice = 6.09, Radiance = 6.69, Transcend = 7.44), black tea (ΔE* Allure = 6.24, Inspire Ice = 5.21, Radiance = 6.51, Transcend = 6.14) and red wine (ΔE* Allure = 6.49, Inspire Ice = 4.76, Radiance = 5.19, Transcend = 5.64), but no change was noticed in Coke and artificial saliva (ΔE < 3.7).ConclusionCeramic brackets undergo color change when exposed to solutions of coffee, black tea and red wine. However, the same crystalline structure, either monocrystalline or polycrystalline, do not follow the same or a similar pattern in color change, varying according to the bracket fabrication, which shows a lack of standardization in the manufacturing process. Coffee dye produced the most marked color changes after 21 days of immersion for most ceramic brackets evaluated.

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Objetivou-se avaliar a eficácia do uso de spray de óleo essencial da Eugenia uniflora L. (Pitanga) na descontaminação de escovas dentárias. Foi realizado um ensaio clínico cruzado duplo cego, com uma amostra de 28 universitários entre 19 e 25 anos de idade, de ambos os gêneros, que não utilizavam antibióticos ou anti-sépticos e autorizaram sua participação por meio da assinatura do Termo de Consentimento Livre e Esclarecido. Os participantes usaram três sprays pelo período padronizado de uma semana: spray teste (pitanga a 2%, água destilada e Tween-80), spray controle positivo (clorexidina a 2%) e spray controle negativo (água destilada e Tween-80). A cada semana, foi disponibilizado um “kit” contendo escova dental com capa, creme dental, e um dos três sprays, tendo um intervalo de uma semana entre o uso destes. Avaliou-se o grau de contaminação bacteriana das escovas pelo S. mutans, depois do uso de cada spray por uma semana, sendo semeadas as diluições de 10-3 do soro fisiológico, onde as escovas foram submersas, no meio de cultura Ágar Mitis Salivarius–Bacitracina. Após a semeadura, as placas foram incubadas em estufa a 37ºC por 48 horas emmicroaerofilia e feita a contagem de UFC/mL. As médias de UFC/mL foram: spray teste = 1968,07, controle negativo = 4867,82 e controle positivo = 337,93. Foram observadas diferenças significativas ao nível de 1% (p = 0,01) ao Teste t de Student entre as médias para todos os grupos. Concluiu-se que o spray testado foi eficaz na descontaminação das escovas dentárias.

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Objeti vo: Avaliar a efi cácia clínica da ti ntura da aroeira no tratamento da estomati te protéti ca. Método: Foram selecionados 18 pacientes usuários de próteses removíveis com diagnósti co clínico para estomati te protéti ca ti po II e presença de candidose associada à prótese, constatados a parti r de um exame clínico e micológico. Os pacientes foram distribuídos em dois grupos: GT (grupo teste) -tratamento com a ti ntura da aroeira; GC (grupo controle), tratamento com nistati na. Todos os pacientes foram orientados a higienizar a prótese com escova e denti frício e, em seguida, aplicar o produto na mucosa palati na e na superfí cie da prótese 3 vezes ao dia, durante 15 dias consecuti vos, remover a prótese à noite e armazená-la em um recipiente com água. No 15º dia de uso, foi realizado um novo exame clínico e micológico para avaliar a efi cácia do tratamento. Os dados foram analisados com os testes Wilcoxon e Mann-Whitney com nível de signfi cância de 5%. Resultados: Observou-se eliminação do processo infl amatório e da infecção por Candida spp. em 66,7% e 77,8% dos casos, respecti vamente, para GT. Já para GC, a eliminação do processo infl amatório e da infecção fúngica ocorreu em 77,8% e 88,9% dos casos, respecti vamente. Estes resultados foram estati sti camente signifi cantes (Wilcoxon p=0,01). Não foi observada diferença estatí sti camente signifi cante entre os dois tratamentos (Mann-Whitney p>0,05). A infecção fúngica foi diagnosti cada apenas na prótese em todos os casos, sendo a C. albicans o microorganismo mais prevalente, estando presente em 94,4% dos casos. Conclusão: O tratamento com a ti ntura da aroeira foi efi caz no tratamento da estomati te protéti ca, promovendo remissão do processo infl amatório e da infecção por Candida spp. Avaliação Clínica e Microbiológica do Tratamento da Estomatite Protética com Tintura de Schinus terebinthifolius Raddi (Aroeira) RESUMO DESCRITORES ABSTRACTEstomati te sob prótese; Ensaio clínico; Candida.Stomati ti s, denture; Clinical trial; Candida. KEYWORDS Objecti ve:To evaluate the clinical effi cacy of Schinus terebinthifolius Raddi (aroeira) ti ncture in the treatment of denture stomati ti s. Method: Eighteen removable denture wearers with clinical diagnosis of type II denture stomati ti s and presence of candidosis associated to the denture use, as confi rmed by clinical and mycological examinati ons, were selected for the study. The pati ents were allocated to two groups: TG (test group) -treatment with Schinus terebinthifolius Raddi (aroeira) ti ncture; CG (control group), treatment with nystati n. All pati ents were instructed to clean the dentures with toothbrush and denti frice, and then apply the product on the palatal mucosa and on denture surface 3 ti mes a day, during 15 consecuti ve days, removing the denture at bedti me and keeping it in a receptacle with water. At the 15th day of use, the clinical and mycological examinati ons were redone to evaluate treatment effi cacy. Data were analyzed stati sti cally by Wilcoxon and Mann-Whitney tests at ...

The synthetic intermaxillary elastic emerged as an alternative for clinical use in patients with latex sensitivity. However, there are disagreements about this elastic protocol use according to the force degradation. Objective: The aim of this study was to evaluate, in vitro, the forces generated by latex and synthetic elastics over time. Material and methods: Sample size of 840 elastics were used (420 latex and 420 synthetic), delivering medium strength (Dental Morelli®) with internal diameter of 1/8”, 3/16”, 1/4” and 5/16”. The elastics were randomly divided into 6 groups according to the time of the force measuring and immersed into distilled water at 37°C. To measure the force in each group, the elastics were stretched in six progressive increases of 100% of its internal diameter with the aid of a testing machine Emic and measured up to 72 hours. Data were analyzed with SPSS 16.0, using one-way analysis of variance (ANOVA). Results: Immediate force level of synthetic elastics was statistically higher than latex elastics in all strains, for the same size. However, the latex elastics mean force slightly decreased over time, while the synthetic elastics presented an abrupt decrease. Conclusion: The synthetic elastic presented high force degradation, decreasing the cost-benefit ratio due to the high frequency of exchange of elastic. The latex elastic showed better mechanical performance in comparison to synthetic ones.