<div><p class="Body1"><strong>Objective</strong>: This <em>in vitro</em> study was to evaluate micro-strains around of implant, under the influence of angulations and vertical misfit in three-element implant-supported fixed partial dentures during axial loading by using strain gauge analysis. <strong>Materials and Methods</strong>: Three external hexagon implants with straight configuration and three external hexagon implants with angled (17°) configuration were inserted into two polyurethane blocks. To measure micro-strain, four strain gauges were bonded onto the surface of each block. Plastic copings were adapted to a standard wax pattern and cast. An axial load of 30 kgf was applied on the center of each implant for 10 seconds, using a load application device. The vertical misfit was measured at six different points by using a stereo microscope with 100-X magnification. <strong>Results:</strong> The results showed that the values for different implant angulations were significant (<em>P</em>= 0.0086). The Pearson’s correlation test between micro-strain and vertical misfit revealed no correlation between angled configuration (<em>P</em>= 0.891) and straight configuration (<em>P</em>= 0.568). <strong>Conclusion</strong>: The micro strain was higher for angled implants; no correlation was found between the vertical misfit and the micro strain values.</p></div>

The simplified fixed prosthesis evaluated presents biomechanical behavior similar to an anatomical prosthesis in the implants and in the surrounding bone structure.

The aim of the present study was to radiographically evaluate the effect of smoking on bone loss resulting from chronic periodontitis. Periapical radiographs were analyzed of 80 patients with chronic periodontitis (40 current or former smokers and 40 never-smokers) that attended a private periodontal practice. The smokers or former-smokers with a minimum consumption of 10 cigarettes/day for a period of over 10 years were selected. Interproximal radiographic bone loss was considered as the distance between the cementum-enamel junction and the alveolar bone crest. Bone loss for smokers was higher than that observed in never-smokers (p < 0.05) (3.33 +/- 1.09 mm and 2.24 +/- 0.76 mm; mean +/- standard deviation for smokers and non-smokers, respectively). When each region of the mouth was comparatively evaluated, it was observed that the smokers' incisors presented the highest bone loss when compared with the other groups of teeth (p < 0.01). Within the limits of the present investigation it can be concluded that smoking enhances the bone loss resulting from periodontitis and that the incisors are the teeth most affected.

Accurate color selection of direct or indirect dental restorations is a subjective task. Mobile phones are tools that may minimize color assessment errors. Objective: To use photographs taken with smartphones to guide the dental surgeon in choosing the right color in oral rehabilitation. Material and Methods: A tooth was photographed for color assessment and the VITA Toothguide 3D-MASTER® shade guide was used. Photographs were submitted to an image editing software for full saturation removal. Images of the tooth and scale in black and white were compared. Results: This method allowed to select the tooth’s value, which is considered the most subjective dimension in color choice. Conclusion: Although it is an auxiliary and complementary method to traditional methods, smartphones are tools capable of reducing the range of color possibilities and minimizing possible failures.KeywordsColor; Photograph; Smartphone.

Cem indivíduos com idades entre 18 e 25 anos, estudantes de Odontologia, não pacientes, foram entrevistados e examinados clinicamente com o objetivo de se avaliar a prevalência e o grau de severidade de Disfunção Craniomandibular. Para tal, foram utilizados índices que constam de avaliações subdivididas em três classificações diferentes: índice anamnético, disfunção clínica e oclusal, levando-se em consideração variáveis como sexo, faixa etária e o fato de terem sido submetidos, ou não, a tratamento ortodôntico. Os resultados obtidos mostraram que 42% dos indivíduos apresentaram sintomas subjetivos leves e nenhum indivíduo apresentou sintomas subjetivos severos. Dos indivíduos, 56% apresentaram algum índice de disfunção clínica, sendo 25% de grau médio ou severo. As mulheres apresentaram um índice mais elevado, com significância estatística. Dos indivíduos 66%, apresentaram um índice oclusal de grau leve e 11% de grau severo. O sexo, faixa etária e tratamento ortodôntico não mostraram diferenças significativas quanto à presença, ou não, de má oclusão.

ResumoIntrodução: O ajuste entre a prótese e o implante é fundamental para determinar a longevidade do tratamento e manutenção do osso periimplantar. Objetivo: Avaliar o desajuste vertical entre diferentes infraestruturas metálicas e plataforma dos implantes, a fim de fornecer informação, para auxiliar na escolha do metal a ser utilizado. Material e método: O estudo utilizou componentes do tipo UCLA (N=40), com antirrotacional, foram divididos da seguinte forma: componentes usinados em titânio (n=10), componentes fundidos em titânio (n=10), níquel-cromo-titânio-molibdênio (n=10) e em níquel-cromo (n=10). Após o torque, as amostras foram analisados em estereomicroscópio. Para caracterização em MEV, foram utilizadas as amostras mais representativas, com maior e menor desajuste vertical. Resultado: Os dados foram analisados por média e desvio padrão e submetidos ao teste ANOVA ONE way, onde os grupos foram estatisticamente diferentes (p=<0,05), seguido do teste TUKEY. Conclusão: A escolha do infraestrutura influencia no valor do desajuste vertical, sendo que o grupo usinado em Ti apresentou o menor valor de desajuste, e o grupo fundido em Ni Cr o grupo com maior valor de desajuste vertical.Descritores: Prótese dentária; implante dentário. Abstract Introduction:The fit between abutment and implant is crucial to determine the longevity of implant-supported prostheses and the maintenance of peri-implant bones. Objective: To evaluate the vertical misfit between different abutments in order to provide information to assist abutment selection. Material and method: UCLA components (N=40) with anti-rotational system were divided as follows: components usinated in titanium (n=10) and plastic components cast proportionally in titanium (n=10), nickel-chromium-titanium-molybdenum (n=10) and nickel-chromium (n=10) alloys. All components were submitted to stereomicroscope analysis and were randomly selected for characterization by SEM. Result: Data were analyzed using mean and standard deviation and subjected to ANOVA-one way, where the groups proved to statistically different (p=<0.05), followed by Tukey's test. Conclusion: The selection of material influences the value of vertical misfit. The group machined in Ti showed the lowest value while the group cast in Ni Cr showed the highest value of vertical misfit.

<p>Deficiencies in the alveolar ridge, dental migration and malocclusion are conditions that may hamper restorative treatment and thus must be resolved by taking a multidisciplinary approach. This clinical case report is associated with orthodontics, implantology and prostheses for rehabilitation. A 34-year-old male patient presented himself in a private practice complaining of aesthetics and discomfort when chewing. At the clinical examination, teeth numbers 11, 12, 21, 22 and 25 were absent, with a removable partial denture replacing them. Due to the prolonged use of this prosthesis, wear of the artificial teeth and the extrusion of the anterior inferior teeth were present. A depression was also present in the vestibular region of the upper incisors, which did not provide adequate lip support. The tomographic examination revealed that despite the deficiency of the vestibular-lingual bone volume, the remnant in this region allowed for the implantation of implants. Orthodontic treatment was performed for the intrusion of the inferior elements and the alignment of the arches, with the goal of providing more spaces for rehabilitation. Afterward, the patient underwent surgery to install implants in the 11, 21 and 25 regions, concomitantly with bone regeneration in the vestibular region of the upper incisors. During this time, the patient used a new removable partial denture. After eight months, the prosthetic phase was started. Ten years after the end of treatment, the patient is satisfied with the results and performs maintenance every six months.</p><p><strong>Keywords</strong></p><p>Tooth movement techniques; Dental implants; Bone transplantation; Dental prosthesis.</p>

O objetivo desse trabalho, foi avaliar o selamento de restaurações de cimento de ionômero de vidro (CIV), utilizando como pré-tratamento da dentina o ácido poliacrílico, ácido tânico e laser Nd:YAG. Foram preparados 40 terceiros molares humanos hígidos e extraídos por indicação cirúrgica, limpos e armazenados em soro fisiológico. Foram feitos preparos Classe V, na face vestibular com ponta esférica diamantada no 3018 – KG Sorensen, com dimensões 3,0 mm de diâmetro por 1,5 mm de profundidade. A seguir, os dentes foram divididos em 4 grupos, de acordo com o pré-tratamento da dentina: restauração sem tratamento prévio da dentina (grupo 1); restauração com tratamento prévio da dentina utilizando o ácido poliacrílico a 11,5% por 60 seg. (grupo 2); restauração com tratamento prévio da dentina utilizando o ácido tânico à 25%, por 30 seg. (grupo 3); restauração com tratamento prévio da dentina utilizando o laser Nd:YAG, com 160 mJ/pulso, 10 Hz, 1,6 W, com tempo de aplicação de 5 seg., sem contato da fibra com a superfície dentinária (grupo 4). As cavidades foram restauradas com CIVRM (Vitremer 3M), e submetidos à termociclagem, com banhos alternados de 5o e 55o C (+ ou - 2oC) e com 300 ciclos por 30 segundos cada banho, em seguida imersos em solução Rodamina B à 2%, à 37o, por 24 horas. Os dentes foram seccionados e submetidos à leitura das infiltrações em estereomicroscópio. Concluiu-se que os diferentes tratamentos da dentina não influenciaram significativamenteos resultados do selamento marginal de restauraçãoCIVRM.