Juliana Alvares Duarte Bonini Campos

Effects of immersion media and repolishing on color stability and superficial morphology of nanofilled composite resin.

This study evaluated the influence of fluoride mouth rinses and repolishing on the superficial morphology and color stability of nanofilled resin. About 150 specimens were prepared and polished using aluminum oxide discs for 15 s with a pressure of 2 kg. The experimental groups were divided according to the immersion medium (artificial saliva, 0.5% sodium fluoride, Fluordent Reach, Oral B, Fluorgard) and repolishing procedure (without and with). The specimens were continuously immersed for 1 week. Thereafter, half of each sample was repolished. A color reading was performed after 24 h of immersion in the artificial saliva baseline, after continuous immersion, and after repolishing. The superficial morphology was examined using scanning electron microscopy (SEM) in a qualitative way. Color change (∆E) data were submitted to a mixed analysis of variance using a Shapiro-Wilk test (p>0.05 for the different immersion media) and Sidaks test (p<0.05 for the differences between groups). In the interaction between the repolishing and the immersion media, Fluorgard showed a statistical difference between the ∆E values with and without repolishing (p<0.0001). On the SEM observations, both Fluordent Reach and Fluorgard caused degradation of the superficial resinous matrix of the composite after continuous immersion. This matrix was removed after repolishing.

Educação em saúde: Efeito de um método de auto-instruçáo sobre os níveis de higiene oral em escolares

Departamento de Odontologia Social Faculdade de Odontologia de Araraquara UNESP, Araraquara/SP

Roughness and morphology of composites: influence of type of material, fluoride solution, and time.

This study evaluated the effect of fluoride solutions on surface roughness and morphology of composites in the short and long term. Specimens were randomly assigned to experimental groups (n=5) according to type of composite (nanofilled, microhybrid, microfilled) and immersion media (artificial saliva, 0.05% sodium fluoride solution, Fluordent Reach, Oral-B, and Fluorgard). Roughness was evaluated at time intervals: T 0 after 24 h in artificial saliva (baseline); T 60 after being in assigned immersion media for 1 min daily over 60 days; and T final after artificial aging (20,000 thermal cycles, 1,200,000 mechanical loading cycles, and continuous immersion for 1,825 min). Surface morphology was qualitatively analyzed by scanning electron microscopy (SEM) at T 60 and T final. Roughness data were submitted to analysis of variance for mixed repeated measures, Sidak, and Tukey tests at α=0.05. Micro-filled resin showed the highest roughness values. Fluoride solutions had no influence on roughness. Higher roughness values were observed after artificial aging. In SEM observations after the artificial aging, the specimens showed surface degradation, irrespective of immersion medium or type of composite. Nano-filled resin showed higher loss of resin matrix and protrusion of filler particles. Roughness was not influenced by fluoride solutions; however, it is material dependent and increases over time.

Influence of light curing units and fluoride mouthrinse on morphological surface and color stability of a nanofilled composite resin

Composite resin is a dental material susceptible to color change over time which limits the longevity of restorations made with this material. The influence of light curing units and different fluoride mouthrinses on superficial morphology and color stability of a nanofilled composite resin was evaluated. Specimens (Nu2009=u2009150) were prepared and polished. The experimental groups were divided according to the type of light source (halogen and LED) and immersion media (artificial saliva, 0.05% sodium fluoride solution‐manipulated, Fluordent Reach, Oral B, Fluorgard). Specimens remained in artificial saliva for 24‐h baseline. For 60 days, they were immersed in solutions for 1 min. Color readout was taken at baseline and after 60 days of immersion. Surface morphology was analyzed by Scanning Electron Microscopy (SEM) after 60 days of immersion. Color change data were submitted to two‐way Analysis of Variance and Tukey tests (αu2009=u20090.05). Surface morphology was qualitatively analyzed. The factor light source presented no significant variability (Pu2009=u20090.281), the immersion media, significant variability (Pu2009<u20090.001) and interaction between factors, no significant variability (Pu2009=u20090.050). According to SEM observations, no difference was noted in the surface of the specimens polymerized by different light sources, irrespective of the immersion medium. It was concluded that the light source did not influence the color stability of composite, irrespective of the immersion media, and among the fluoride solutions analyzed, Fluorgard was the one that promoted the greatest color change, however, this was not clinically perceptible. The immersion media did not influence the morphology of the studied resin. Microsc. Res. Tech. 77:941–946, 2014.

Avaliação Clínica das Posturas de Trabalho Empregadas na Clínica de Odontopediatria por Estudantes de Odontologia

Resumen pt: Objetivo: Verificar, as posturas e posicoes de trabalho adotadas por graduandos em 360 procedimentos clinicos odontopediatricos e investigar a associacao...

Causal Factors of Anxiety Symptoms in Children

Aim: The present work aimed to investigate the impact of the child’s cognitions associated with ambiguous stimuli that refer to anxiety, both parents’ fears and anxiety, and parents’ attributions to the child’s interpretations of ambiguous stimuli on child anxiety. The influence of parental modelling on child’s cognitions was also analyzed. Method: The final sample was composed of 111 children (62 boys; 49 girls) with ages between 10 and 11 years (M = 10.6, SD = 0.5) from a community population, and both their parents. The variables identified as most significant were included in a predictive model of anxiety. Results: Results revealed the children’s thoughts (positive and negative) related to ambiguous stimuli that describe anxiety situations. Parents’ fears and mothers’ anxiety significantly predict children’s anxiety. Those variables explain 29% of the variance in children general anxiety. No evidence was found for a direct parental modeling of child cognitions. Conclusion: Children’s positive thoughts seem to be cognitive aspects that buffer against anxiety. Negative thoughts are vulnerability factors for the development of child anxiety. Parents’ fears and anxiety should be analyzed in separate as they have distinct influences over children’s anxiety. Mothers’ fears contribute to children’s anxiety by reducing it, revealing a possible protective effect. It is suggested that the contribution of both parents’ fears to children’s anxiety may be interpreted acknowledging the existence of “psychological and/or behavioral filters”. Mothers’ filters seem to be well developed while fathers’ filters seem to be compromised. The contribution of mothers’ anxiety (but not fathers’ anxiety) to children’s anxiety is also understood in light of the possible existence of a “proximity space” between the child and parents, which is wider with mothers than with fathers.

Elaboração de um jogo digital educacional sobre saúde bucal direcionado para a população infantil

Objetivo: Elaborar um jogo digital sobre saude bucal para criancas de 5 a 7 anos. Metodo: O jogo, que recebeu o nome de Dr. Trata Dente, se baseou na abordagem de tres diferentes topicos sobre saude bucal: a) a placa bacteriana e as principais doencas por ela causadas; b) os metodos de higiene bucal para controle da placa bacteriana, e c) a carie dental e suas medidas preventivas. Esses topicos foram expostos sequencialmente, em tres diferentes fases do jogo. O Dr. Trata Dente e representado pela figura de um dentista super-heroi mirim, que conversa com as criancas sobre saude bucal durante o jogo. Este e subdividido segundo suas proposicoes junto as criancas: associacao, memoria e pintura. Apos seu desenvolvimento, o jogo foi analisado por tres profissionais de cada area: Odontologia, Pedagogia e Psicologia (n=9), os quais observaram a adequacao dos conceitos apresentados em relacao a saude bucal, as capacidades linguisticas trabalhadas, ao atendimento dos criterios didaticos pretendidos e a ludicidade. Resultados: De acordo com os cirurgioes-dentistas, os conceitos odontologicos emitidos estao adequados. Segundo os pedagogos, a escolha de um super-heroi foi acertada e as explicacoes dadas estao bem elaboradas, mostram-se organizadas e com linguagem acessivel, porem longas. Para os psicologos, o jogo apresenta potencialmente um efeito positivo sobre o aprendizado das criancas, mas o personagem deve interagir mais com elas. Apos a avaliacao, modificou-se o jogo segundo as sugestoes dos profissionais. Conclusao: Apesar das alteracoes sugeridas, o jogo apresenta-se adequado para o ensino de saude bucal por meio da brincadeira. Objective: The aim of this study was to develop an educational oral health digital game for 5-to-7-year-old children. Method: The game, called Dr. Trata Dente, was based on the approach to three different oral health-related topics: a) bacterial plaque and the main diseases caused by it; b) oral hygiene methods for bacterial plaque control; c) dental caries and preventive measures for this disease. These topics were discussed in sequential order in three different stages of the game. Dr. Trata Dente is represented by the figure of a little super-hero dentist, who talks to the children about oral health during the game. The game is sub-divided according to its propositions to the children, into an association game, a memory game and a coloring game. After its development, the game was evaluated by three professionals of each of the following areas: Dentistry, Pedagogy and Psychology (n=9), who verified the suitability of the concepts presented in the game as regards oral health, linguistic abilities worked with the children, fulfillment of the intended didactic criteria, and the playful aspect of the game. Results: According to the dentists, the dental concepts presented in the game are adequate. According to the pedagogues, the choice of a super-hero was correct and the given explanations are well elaborated, organized and have accessible language, although long. For the psychologists, the game has a potential positive effect on the childrens learning, but there should be more interaction of the character with the children. After this evaluation, changes were made in the game according to the professionals suggestions. Conclusion: It was concluded that in spite of the suggested alterations, the game is suitable for teaching oral health by means of childrens play.

Fatores de Risco de Desordens Osteomusculares Presentes no Posto de Trabalho de Estudantes de Odontologia

Departamento de Odontologia Restauradora Faculdade de Odontologia de Araraquara (UNESP), Araraquara/SP

Orthodontic Treatment and Temporomandibular Disorders

However according to Mongini (1977), the occurrence of dysfunctional problems of the stomatognathic system may be related to the termination of orthodontic treatment. Other authors have demonstrated the need for occlusal therapy after termination of orthodontic treatment in order to eliminate the risk of bone reabsorption, muscular pain and TMJ disorders resulting from occlusal trauma (Salzman, 1974; Runge et al., 1989; Gianelly, 1989, Kundinger et al., 1991).

Reprodutibilidade de Medidas Antropométricas Estáticas de Graduandos de Odontologia e de Mochos Odontológicos

Departamento de Odontologia Social Faculdade de Odontologia de Araraquara (UNESP), Araraquara/SP