Otimização do Sorriso com Restaurações Diretas de Compósito Resinoso Nanoparticulado / Optimization of the Smile using Direct Resin Nanocomposite Restorations

Com o conhecimento das análises faciais, do sorriso e da harmonia dental, associados ao avanço das técnicas e materiais restauradores, tornousepossível solucionar alterações dentárias com a realização de restaurações diretas. Entre os tratamentos para restabelecer o equilíbrio dosorriso e a harmonia da beleza da face está o tratamento de fechamento de diastemas e a reanatomização por meio de restaurações diretas emdentes conóide, girovertidos e mal alinhados no arco dental. Baseados nas informações acima, o objetivo deste relato de caso foi apresentara otimização do sorriso com restaurações diretas, utilizando resinas compostas. Paciente gênero feminino, 14 anos de idade, procurou aUniversidade Paranaense ? UNIPAR com queixa de espaços entre os dentes. Após avaliações clínicas e radiográficas e com o objetivo demelhorar de forma rápida e conservadora, foram realizadas restaurações diretas nos elementos 11 e 21, modificando por meio do fechamentode diastema. Além disso, o proporcionamento restaurador do incisivo lateral conóide (12) e do canino (23), para suprir a agenesia do elemento22 foi realizado. Foram utilizadas resinas compostas nanoparticuladas, associadas a um sistema adesivo convencional. O resultado alcançadodemonstrou a possibilidade eficaz de tratamento restaurador direto, para devolver a harmonia do sorriso prejudicado por alterações de forma eposição, com a vantagem de ser uma técnica rápida, conservadora, reversível e de menor custo, quando comparado com restaurações indiretas.

Analysis for evaluating facial esthetics associated with the evolution of restorative materials and techniques allows solving dental changes byusing direct restorations. Among the treatments to restore balance and harmony of the smile from the face of beauty is the treatment of diastemaclosure and reanatomização through direct restorations in conoid teeth, and misaligned girovertidos the dental arch. Based on the above,the purpose of this cstudy was to optimize a smile by direct restorations using composite resins. The patient, female, 14 years old, sought theParana University (UNIPAR) complaining lack of space for her teeth. After clinical and radiographic evaluation, with the goal of improvingquickly and conservatively, direct restorations in elements 11 and 21 were done to close diastema. Moreover, the proportioning restorer of theconoid lateral incisor (12) and canine (23) to supply the agenesis of element 22 was performed. Nanoparticulate composites were associatedwith conventional adhesive. The result demonstrated the possibility of effective direct restorative treatment to return the smile harmony harmedby changes in teeth shape and position, with the advantage of being a fast, conservative, reversible and less costly technique as compared toindirect restorations.

Pacifier-sucking habit duration and frequency on occlusal and myofunctional alterations in preschool children.

The objective of this study was to evaluate the association of pacifier-sucking habit with occlusal and oral myofunctional alterations in preschool children. Eighty-four 2- to 5-year-old children participated in the study. Data on duration and frequency of pacifier use were collected from parents or guardians. Occlusal and oral myofunctional characteristics were examined by a dentist and a speech therapist, respectively. Chi-square tests and Poisson regression were used to analyze the data. The occlusal characteristics that were significantly associated with a pacifier-sucking habit were anterior open bite, altered canine relation, posterior crossbite, increased overjet, and malocclusion. The oral myofunctional characteristics that were significantly associated with a pacifier-sucking habit were resting lip position, resting tongue position, shape of the hard palate, and swallowing pattern. The strongest associations were for anterior open bite (prevalence ratio [PR] = 11.33), malocclusion ( PR = 2 .33), altered shape of the hard palate ( PR = 1.29), and altered swallowing pattern (PR = 1.27). Both duration and frequency of pacifier-sucking habit were associated with occlusal and oral myofunctional alterations. These results emphasize the need for pediatric dentists to advise parents and caregivers about the risks of prolonged pacifier use and refer children to professionals for multidisciplinary assistance to minimize these risks whenever necessary.

Pacifier-sucking habit duration and frequency on occlusal and myofunctional alterations in preschool children

The objective of this study was to evaluate the association of pacifier-sucking habit with occlusal and oral myofunctional alterations in preschool children. Eighty-four 2- to 5-year-old children participated in the study. Data on duration and frequency of pacifier use were collected from parents or guardians. Occlusal and oral myofunctional characteristics were examined by a dentist and a speech therapist, respectively. Chi-square tests and Poisson regression were used to analyze the data. The occlusal characteristics that were significantly associated with a pacifier-sucking habit were anterior open bite, altered canine relation, posterior crossbite, increased overjet, and malocclusion. The oral myofunctional characteristics that were significantly associated with a pacifier-sucking habit were resting lip position, resting tongue position, shape of the hard palate, and swallowing pattern. The strongest associations were for anterior open bite (prevalence ratio [PR] = 11.33), malocclusion (PR = 2.33), altered shape of the hard palate (PR = 1.29), and altered swallowing pattern (PR = 1.27). Both duration and frequency of pacifier-sucking habit were associated with occlusal and oral myofunctional alterations. These results emphasize the need for pediatric dentists to advise parents and caregivers about the risks of prolonged pacifier use and refer children to professionals for multidisciplinary assistance to minimize these risks whenever necessary.

In vitro assessment of solvent evaporation from commercial adhesive systems compared to experimental systems.

Solvents should be properly evaporated after application to dental substrates. The aim of this study was to assess the evaporation of commercial, experimental and neat solvents. The tested null hypotheses were that there are no differences in solvent evaporation regardless of its formulation and over time. Evaporation from commercial adhesive systems (Scotchbond Multipurpose Primer, Scotchbond Multipurpose Adhesive, Prime & Bond NT, Multi Bond, Excite, Single Bond 2, Adhese Primer, Adhese Bond, Xeno III A and Xeno III B) and experimental primers (35% HEMA plus 65% acetone or ethanol or water v/v) were compared to neat solvents (acetone, ethanol and water). Samples (10 microL) of these products were dripped into glass containers placed on a digital precision balance. Evaporation was assessed at 0, 5, 10, 15, 30, 60, 120, 300 and 600 s times to calculate mass loss. Data were analyzed statistically by ANOVA and Bonferroni's correction (a=0.05). Acetone-based products exhibited a remarkable capacity to evaporate spontaneously over time. Neat acetone evaporated significantly more than the HEMA-mixtures and the commercial formulations (p<0.05). The incorporation of monomers and other ingredients in the commercial formulations seem to reduce the evaporation capacity. Solvent evaporation was time and material-dependent.

In vitro assessment of solvent evaporation from commercial adhesive systems compared to experimental systems

Solvents should be properly evaporated after application to dental substrates. The aim of this study was to assess the evaporation of commercial, experimental and neat solvents. The tested null hypotheses were that there are no differences in solvent evaporation regardless of its formulation and over time. Evaporation from commercial adhesive systems (Scotchbond Multipurpose Primer, Scotchbond Multipurpose Adhesive, Prime & Bond NT, Multi Bond, Excite, Single Bond 2, Adhese Primer, Adhese Bond, Xeno III A and Xeno III B) and experimental primers (35 percent HEMA plus 65 percent acetone or ethanol or water v/v) were compared to neat solvents (acetone, ethanol and water). Samples (10 µL) of these products were dripped into glass containers placed on a digital precision balance. Evaporation was assessed at 0, 5, 10, 15, 30, 60, 120, 300 and 600 s times to calculate mass loss. Data were analyzed statistically by ANOVA and Bonferroni's correction (a=0.05). Acetone-based products exhibited a remarkable capacity to evaporate spontaneously over time. Neat acetone evaporated significantly more than the HEMA-mixtures and the commercial formulations (p<0.05). The incorporation of monomers and other ingredients in the commercial formulations seem to reduce the evaporation capacity. Solvent evaporation was time and material-dependent.

O solvente deve ser adequadamente evaporado após aplicação ao substratos dentários. O objetivo deste estudo foi avaliar a evaporação de formulações comerciais, primers experimentais e solventes puros. As hipóteses nulas testadas foram de que não há diferenças da quantidade evaporada independentemente do material e tempo. Evaporação dos sistemas adesivos comerciais (Scotchbond multipurpose primer, Scotchbond multipurpose adhesive, Prime & Bond NT, Multi Bond, Excite, Single Bond 2, Adhese Primer, Adhese Bond, Xeno III A e Xeno III B) e primers experimentais (35 por cento HEMA associado com 65 por cento acetona, etanol ou água v/v) foram comparadas a solventes puros (acetona, etanol e água). Amostras (10 µL) de cada produto foram dispensadas em balança de precisão digital. As massas nos tempos 0, 5, 10, 15, 30, 60, 120, 300 e 600 s foram registradas. Os dados foram analisados estatisticamente por ANOVA e Bonferroni (a=0,05). Produtos a base de acetona exibiram maior capacidade de evaporação espontânea ao longo do tempo. Acetona pura evaporou significantemente mais que as misturas de HEMA e formulações comerciais (p<0,05). A incorporação de monômeros e outros ingredientes nas formulações comerciais reduzem a capacidade de evaporação. A evaporação é dependente do produto e do tempo.