Utilizacão do índice estético de Belser na reabilitação estética de implante anterior caso clínico / Belser's esthetic index use in the esthetic rehabilitation ot single implant crown - case report

O objetivo foi relatar um caso clínico de reabilitação com implante unitário na maxila anterior, utilizando os índices de estética branca e vermelha de Belser. No início do tratamento, o escore total dos índices foi de 7, sendo 1 estética branca e vermelha 6, demonstrando que o caso apresentava estética insatisfatória. Após a reabilitação, o escore final foi de 16, melhorando significativamente os critérios da estética branca (9) e vermelha (7). Foi concluído que o uso desse índice no diagnóstico, planejamento, execução e avaliação final do resultado é eficaz para a obtenção de um resultado estético satisfatório.

The aim of this work was report a clinical case of single implant crown in the anterior maxilla, using Belser's esthetic index in the criteria White Esthetic Score (WES) and Pink Esthetic Score (PES). Before the treatment, the global score was 7 (WES-1, PES-61, meaning an unsatisfactory esthetic outcome. After the treatment, the final global score was 16 improving significantly the WES (9) and the PES (7). It was concluded that the use of Belser's esthetic index in the diagnostic, treatment plan and procedures, and final evaluation is helpful to obtain a satisfactory aesthetic outcome.

Oclusão esferoidal: uma nova alternativa para o equilíbrio funcional em prótese total / Spherical occlusion: a new alternative for the functional balance in complete denture

O objetivo desse trabalho foi apresentar uma nova técnica para a obtenção da oclusão balanceada bilateral, estabilizando a prótese através de esferas, a qual tem no seu princípio de desenvolvimento o objetivo de suprir as deficiências existentes nas outras técnicas. Foi realizado um caso clínico com o intuito de mostrar sua utilização em um paciente totalmente edêntulo. Foi discutido dentre seus aspectos funcionais, o estabelecimento do equilíbrio físico verdadeiro, através de três pontos de contatos, e o seu caráter deslizante nos movimentos excêntricos, além do aspecto natural dos dentes anteriores. Os autores concluíram que a utilização desta técnica forneceu ao paciente um padrão de contato deslizante com equilíbrio real nos movimentos excêntricos, resultando em maior estabilidade e, provavelmente, menor esforço muscular durante a função.

The aim of this study was to present a new technique for the acquisition of the balanced bilateral occlusion, stabilizing the denture through spheres, which has as its principIe of development the objective of surpassing the deficiencies existing in the other techniques. A clinical case was performed with the intention of demonstrating its application to a totally edentulous patient. Among the functional aspects discussed were the establishment of a true physical equilibrium, through three contact points, the gliding character of eccentric movements, as well as the natural aspect of anterior teeth. The authors concluded that the utilization of this technique offered the patient a gliding contact with real balance in eccentric movements resulting in greater stability and probably smaller muscular effort during function.

Digitized study of the correlation between the face and tooth shapes in young adult individuals

This study evaluated the clinical validity of the ôWilliamsÆs law of harmonyõ to select artificial teeth in complete dentures, in which there is a similarity between the face and maxillary central incisor (MCIs) shapes. Two photographs were taken (face and MCIs) from 79 students aged 18-25 years, and digitized using a Genius HR-7 scanner. Face and teeth tracings were performed from the photographs using a Easy Digitizer 1.2 software. A non-parametric Chi Square test was applied in the statistical analysis (p<0.05). Results showed a predominance of the square shape (55.70%) in relation to the triangular (27.85%) (p<0.01), and the ovoid (16.45%) (p<0.001) ones. Considering the MCIs shape, the square (67.09%) predominated in relation to the ovoid (18.99%) (p=0), and the triangular (13.92%.) (p=0) ones. The analysis among the shapes showed a lower proportion of identical (10.13%) when compared with no similar (48.10%) (p=0), and similar (41,77%) (p<0.001) ones. Authors concluded that the ôWilliamsÆ law of harmonyõ was not confirmed in the majority of the individuals, and further studies are necessary to actually define which theory satisfies the clinical requirements. The clinical experience and critical sense seem to be more important for a satisfactory esthetic result.

Electromyographyc evaluation of complete denture wearers using the balancing ramps concept

This study verified through electromyography the masticatory muscle behavior resulting of the balancing ramps technique to obtain balance in double complete dentures. Eleven totally edentulous patients that used their complete dentures for 5 years at least, had new other ones made and balanced by the balancing ramp technique. The electromyographyc (EMG) activity pattern was registered in anterior temporal (T) and masseter (M) muscles in the rest position (R) and in the maximal voluntary contraction in the intercuspal position (MVCIP), using Myosystem I« (Prosecon Ltda., Uberlândia, MG, Brazil), in four experimental moments: T0 û before the prostheses installation; T1 û 1 month after installation; T2 û 2 months after installation; T3 û 3 months after installation. Results showed a symmetry reduction between T muscles and a little increasing between M muscles in the R position. In the MVCIP position, it there was a reduction for both T and M muscles. The F test showed no statistical significant differences (p<0.05). Authors concluded that the employed technique promote no balance of the masticatory muscles in the tested experimental moments.

Esthetic analysis of the smile

This study analyzed the esthetics components of the smile, evaluating the relationship between the curve formed by the incisal line of the anterior superior teeth and the curve of the inferior lip, the touch of this incisal line on the inferior lip, the teeth displayed during smile, the relationship between the facial midline with the arch midline, the location of the arch midline and gender differences. Eighty-eight undergraduate students of the dentistry course of the TiradentesUniversity were selected. Two photographs were taken (smiling face and smile) using digital camera. The statistical analysis was performed after image tracing evaluation. Results show that the coincidence of the facial midline with the arch midline occurred only on half of the students. Most of the students presented parallelism between the incisal plan and the interpupillary line. Smiles with or without touch of the incisal line on the lower lip, smiles revealing up to the seconds premolars or firsts molars, and parallel or straight smiles were also most commonly observed. The majority of the men presented centeredmidline arch while women presented deviation to the right. No difference was found between the distribution of the arch midline.

Reabilitação funcional em paciente totalmente edêndulo com técnica alternativa de confecção de pistas deslizantes / Functional rehabilitation in totally edentulous patient using alternative technique of sliding plates fabrication

O objetivo deste trabalho foi mostrar a sequência laboratorial e utilização das pistas deslizantes em paciente totalmente edêntula e portadora de distúrbios funcionais do sistema estomatognático. As pistas deslizantes foram confeccionadas a partir das próteses totais antigas, e o tratamento realizado seguindo os princípios de restabelecimento das funções fisiológicas. Foi abordada a importância do tratamento diferenciado do paciente totalmente edêntulo e o valor terapêutico do condicionamento das estruturas e funções, previamente ao tratamento definitivo. Os movimentos mandibulares no plano horizontal foram avaliados através da comparação de registros do arco Gótico de Gysi, antes e após a utilização das pistas. Os autores concluíram que, diante da performace clínica apresentada, as pistas deslizantes parecem ser uma alternativa satisfatória para o restabelecimento das condições fisiológicas do sistema estomatognático.

Obtenção do equilíbrio funcionalem prótese total com a utilização de rampas posteriores / Achieving functional balance in complete dentures with the use of balancing ramps

O objetivo deste trabalho foi relatar um caso clínico de obtenção do equilíbrio funcional em prótese total com a utilização das rampas posteriores de Nóbilo. A técnica foi realizada salientando-se a importância do equilíbrio oclusal para a estabilidade articular mesmo quando há a interposição do bolo alimentar entre os dentes artificiais, sem comprometer a estética ou a função. Foi discutida a necessidade da oclusão balanceada e a sua interação com os outros fatores relacionados às próteses totais. Os autores concluíram que a utilização dessa técnica forneceu ao paciente um padrão de contato deslizante que proporcionou equilíbrio e um provável menor esforço muscular durante a função.

Effect of intrinsic pigmentation on the flexural strength of a microwave-cured acrylic resin

This study investigated the effect of intrinsic pigmentation on the transverse strength of a microwave-cured acrylic resin. Forty transverse strength specimens were fabricated according to ADA specification #12 and divided into 5 groups. No fibers were added to group I (GI, control group); acrylic stain (AS) was added to GII and GIII in concentrations of 0.5 and 1.5 percent w/w, respectively; acrylic fibers (AF) were added to groups GIV and GV in concentrations of 0.5 and 1.5 percent w/w, respectively. All specimens were irradiated in a microwave oven with a cycle of 3 min at 360 W, followed by 4 min resting, then 3 min at 810 W. Flasks were bench-cooled for 30 min at room temperature, followed by immersion in cold tap water for 30 min. After storage in distilled water at 37ºC for 48 h, all specimens were tested for flexural strength in a testing machine (EMIC-DL 500) at a crosshead speed of 0.5 cm/min. Mean and standard deviation (MPa) for the flexural strength test were: GI=86.0 ± 7.9; GII=86.0 ± 9.8; GIII=86.6 ± 7.7; GIV=84.9 ± 5.3; GV=84.9 ± 5.2. No statistical differences were detected among the groups (ANOVA, p>0.05). The addition of the acrylic fibers or the acrylic stain did not affect the transverse strength of the microwave-cured acrylic resin

Técnica de caracterizaçäo de bases de prótese utilizando fibras de lä acrílica / Denture bases characterization technique using acrylic wool fibers

Os autores apresentam uma técnica de pigmentaçäo intrínseca de bases de prótese através da incorporaçäo em camadas de fios de lä acrílica na resina de cura térmica. O método de caracterizaçäo utilizado reproduz a translucidez, a profundidade e os tons dos tecidos gengivais, tornando a base da prótese mais natural