Eunice Kuhn

Ethanol-wet bonding technique: Clinical versus laboratory findings

OBJECTIVES This study evaluated the microtensile bond strength (μTBS) and nanoleakage (NL) of dentin bonded interfaces produced with ethanol-wet and water-wet bonding protocols under clinical and laboratory conditions. METHODS The sample was composed of forty primary second molars in advanced exfoliation process. Occlusal cavities were prepared leaving a flat dentin surface on the pulpal floor. In half of the teeth, the water-wet protocol was followed using a three-step etch-and-rinse adhesive. In the other half, dentin was dehydrated with ascending ethanol solutions (50%, 70%, 80%, 95% and 3×100%), 15s each for the ethanol-bonding protocol. An experimental hydrophobic primer was used, followed by the neat adhesive application. Resin build-ups were prepared, stored for 24h, sectioned into sticks and tested in tensile mode (0.5mm/min). NL was performed for all groups. The μTBS and NL data were submitted to two-way ANOVA and Kruskall-Wallis tests, respectively (α=0.05). RESULTS Under clinical conditions, the highest μTBS was observed for the water-wet bonding while under the laboratory setting, the highest μTBS was obtained for the ethanol-wet bonding. Increased NL was observed in the water-wet bonding groups irrespective of the bonding condition. SIGNIFICANCE The immediate benefits of the ethanol-bonding observed in the laboratory setting was not confirmed when the same protocol was performed in vivo. However, as reduced nanoleakage was seen in adhesive interfaces produced with the ethanol-wet bonding technique, suggests that the hybrid layer may be more resistant to degradation.

Incidência de lesões de cárie em bebês após 15 meses de um Programa Educativo-Preventivo

Purpose: To evaluate an educative-preventive program in the control of caries disease in 160 infants aged 1 to 21 months. Method: Healthy and caries-free children were enrolled in the study and attended clinical visits at three-month intervals during 15 months. At each visit, depending on the child’s age, the biofilm was removed with gauze or pediatric toothbrush. After visual examination, the number of teeth and eventual alterations were recorded. The mothers were instructed during adequate preventive practical activities using verbal instruction, posters and slide projection. Educative lectures were given at the beginning of the study and at 6-month intervals thereafter. The oral examination and maternal training were conducted at Basic Health Units, Community Centers and at the University. To verify the occurrence of changes in the dietary and hygiene habits, questionnaires were applied at the beginning of the study and after 12 months. Results: Most mothers have not completed the elementary education and their family income ranged from 1 to 3 minimum salaries. After 15 months, the withdrawal rate was 23.8%, totalizing an examined population of 122 babies. In these babies, caries incidence was 7.3% with 0.25 decayed teeth on average. Including the white spot lesions, caries incidence was 9.8% with 0.4 decayed teeth on average. Conclusions: The educative-preventive program contributed to lessen caries incidence by stimulating the adoption of healthier habits, as it was observed a reduction of 33% in nocturnal bottlefeeding and an increase of 20.9% in oral hygiene

The influence of the lining material on the repair of the infected dentin in young permanent molars after restoration: A randomized clinical trial

Aim: This study evaluated the impact of liner material on the fluorescence, morphological and mineral characteristics of permanent carious dentin after cavity sealing. Methods: Thirty children (11.0 ± 2.7 years old) presenting at least one active deep carious lesion in permanent molars were selected. Fragments of carious dentin were removed from teeth before lining the cavity (baseline samples) with high-viscosity glass ionomer cement (G1) or an inert material (wax - G2). Cavities were restored with composite resin and reopened 60 days later, and other fragments were removed (60-day sample). The laser fluorescence (LF) readings and morphological and mineral changes of both groups were compared. Results: After 60 days, forty teeth were available for evaluation. Lower LF means were obtained (Wilcoxon signed-rank test; P< 0.05), and enhanced calcium and phosphorus levels were detected for both groups (t-test, P< 0.05). An uptake of fluorine was observed only in G1 (t-test; P< 0.05). Regardless of the group, baseline samples exhibited clear signs of bacterial invasion, and the collagen fibers were exposed; the 60-day samples showed a better-organized tissue with a more compact intertubular dentin. Conclusion: Caries arrestment with dentin reorganization occurs regardless of the lining material placed in contact with the infected dentin.

Infant motivation in dental health: attitude without constant reinforcement.

INTRODUCTION Social factors determine the childs behavior and motivation is an important task in the teaching-learning process. This longitudinal and cross-sectional study aimed to analyze the effectiveness of a motivational activity program for oral hygiene habits formation after motivation and without constant reinforcement. MATERIALS AND METHODS The sample was constituted of 26 children (mean 6 years old) from a Public Kindergarten School in Ponta Grossa, PR, Brazil. Data were collected applying a test-chart, with figures reporting the process of dental health/illness. Some figures were considered positive to dental health (dentist/Cod 1, toothbrush/Cod 3, dentifrice/dental floss/Cod 6, fruits/vegetables/Cod 7 and tooth without caries lesion/Cod 8) and negative on dental health (sweets/Cod 2, bacteria/Cod 4, tooth with caries lesion/Cod 5). The figures presentation occurred in three different stages: First stage - figures were presented to children without previous knowledge; second stage - following the motivational presentation, and third stage - 30 days after the first contact. RESULTS On the first stage, most children select good for the figures considered harmful to their teeth (Cod 2-88%; Cod 4-77% and Cod 5-65%). On the second stage, there was a lower percentage: 23% (P < 0.0001), 8% (P < 0.0001), and 23% (P = 0.0068) related to the Cod 2, 4, and 5. On the third stage, the results showed again an association with the good choice to these figures considered harmful (Cod 2-85%, Cod 4-65% and Cod 5-54%) similar the results obtained on the first stage. CONCLUSION The motivational programs performed without constant reinforcement does not have a positive influence in changing the childs behavior related to a better dental care.

O impacto da extensão universitária sobre a formação acadêmica em Odontologia

Com objetivo de avaliar a contribuicao da extensao universitaria na formacao e historia de vida de estudantes de Odontologia, realizou-se um estudo qualitativo, de carater descritivo-exploratorio, utilizando a tecnica do grupo focal. O material foi analisado com a tecnica de analise do discurso do sujeito coletivo. Os resultados referiram-se ao impacto exercido pela vivencia academica em atividades extensionistas nos campos pessoal, profissional e da cidadania. As percepcoes dos sujeitos revelaram a oportunidade de desenvolvimento e aprimoramento de suas habilidades profissionais, por meio do reconhecimento de distintas realidades de vida, da ruptura do modelo tradicional de ensino e do proficuo relacionamento entre academico, universidade e sociedade. Foram relatados sentimentos de satisfacao, realizacao pessoal, reconhecimento, e de ser um cidadao ativo e critico. Conclui-se ser a experiencia no campo da extensao um importante agente para o processo individual e coletivo de formacao academica.

El impacto de la extensión universitaria sobre la formación en Odontología

Com objetivo de avaliar a contribuicao da extensao universitaria na formacao e historia de vida de estudantes de Odontologia, realizou-se um estudo qualitativo, de carater descritivo-exploratorio, utilizando a tecnica do grupo focal. O material foi analisado com a tecnica de analise do discurso do sujeito coletivo. Os resultados referiram-se ao impacto exercido pela vivencia academica em atividades extensionistas nos campos pessoal, profissional e da cidadania. As percepcoes dos sujeitos revelaram a oportunidade de desenvolvimento e aprimoramento de suas habilidades profissionais, por meio do reconhecimento de distintas realidades de vida, da ruptura do modelo tradicional de ensino e do proficuo relacionamento entre academico, universidade e sociedade. Foram relatados sentimentos de satisfacao, realizacao pessoal, reconhecimento, e de ser um cidadao ativo e critico. Conclui-se ser a experiencia no campo da extensao um importante agente para o processo individual e coletivo de formacao academica.

The impact of university extension on academic training in Dentistry

Com objetivo de avaliar a contribuicao da extensao universitaria na formacao e historia de vida de estudantes de Odontologia, realizou-se um estudo qualitativo, de carater descritivo-exploratorio, utilizando a tecnica do grupo focal. O material foi analisado com a tecnica de analise do discurso do sujeito coletivo. Os resultados referiram-se ao impacto exercido pela vivencia academica em atividades extensionistas nos campos pessoal, profissional e da cidadania. As percepcoes dos sujeitos revelaram a oportunidade de desenvolvimento e aprimoramento de suas habilidades profissionais, por meio do reconhecimento de distintas realidades de vida, da ruptura do modelo tradicional de ensino e do proficuo relacionamento entre academico, universidade e sociedade. Foram relatados sentimentos de satisfacao, realizacao pessoal, reconhecimento, e de ser um cidadao ativo e critico. Conclui-se ser a experiencia no campo da extensao um importante agente para o processo individual e coletivo de formacao academica.

Incidence of Carious Lesions in Infants After 15 Months of an Educative-Preventive Program

Objetivo: Avaliar um programa educativo/preventivo no controle da doenca carie em 160 bebes na faixa etaria de 1 a 21 meses. Metodo: As criancas selecionadas, saudaveis e sem carie, foram atendidas de 3 em 3 meses durante 15 meses. Em cada consulta, dependendo da idade da crianca, o biofilme era removido com gaze ou escova infantil. Apos exame visual, o numero de dentes e eventuais alteracoes eram registradas. As maes foram orientadas em praticas preventivas adequadas utilizando-se de orientacao verbal, cartazes e projecao de slides. Palestras educativas foram ministradas no inicio da pesquisa e de 6 em 6 meses. O exame bucal e treinamento materno em higiene foram realizados nas Unidades Basicas de Saude, Centros Comunitarios e Universidade. Com o intuito de verificar alteracoes nos habitos alimentares e de higiene, foram aplicados questionarios no inicio do estudo e apos 12 meses. Resultados: A maioria das maes nao possuia o ensino fundamental completo e a renda familiar variava de um a tres salarios minimos. Apos 15 meses, o percentual de desistencia foi de 23,8%, sendo examinados 122 bebes. Nesses, a incidencia de carie foi de 7,3% com uma media de 0,25 dentes cariados. Incluindo as manchas brancas, a incidencia de carie foi de 9,8% com uma media de 0,4 dentes cariados. Conclusao: O programa educativo/preventivo contribuiu para uma menor incidencia de carie, estimulando a adocao de habitos mais saudaveis, uma vez que ocorreu reducao de 33% na amamentacao noturna e aumento de 20,9% na higiene bucal.