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% w/w, respectively; acrylic fibers (AF) were added to groups GIV and GV in concentrations of 0.5 and 1.5% 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 37 degrees C 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.
The evolution of the ceramic systems increasingly seek s to meet the aesthetic and functional needs of the restorations, providing composites with greater tenacity, translucency and resistance to traction and flexion, increasing the longevity of the restorations. Concomitantly with the development of restorative materials and minimally invasive techniques, professionals combine digital tools to improve visualization of aesthetic problems, create possible solutions and accurately guide clinical and laboratory procedures to achieve predictable results. Thus, in this case report we aimed to describe the changes in facial expression, through ultrathin ceramic laminates in patients with the main complaint of dissatisfaction with the aesthetic appearance of their smile. The team of professionals followed all the clinical steps required, from digital planning, restorative testing, mock up, the choice of material and the cementation of the restorations. In this way, it was possible to obtain satisfactory aesthetic results, through the choice of a highly personalized trea tment, with adequate materials and planning the patient's needs.
Ao Prof. Dr. Wi/kens Aurélio Buarque e Silva, orientador desse trabalho, o meu muito obrigado por sua segura orientação e presença constante no desenvolvimento dessa tese. Ao Prof. Dr. Frederico Andrade e Silva, os meus sinceros agradecimentos por ter orientado meus passos iniciais na pós-graduação, e por seus conselhos quanto a fidelidade na vida acadêmica. À FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO, FAPESP, pela valiosa contribuição e confiança providas nesse projeto, processo n° 97/13.750-3. xiii Ao Prof. José Augusto Ataíde Lisboa, da Faculdade de Odontologia da Universidade Federal da Bahia, verdadeiro mestre, amigo e exemplo de profissional a ser seguido, por sua maneira honesta e decente de conduzir a vida acadêmica, com você aprendi o verdadeiro significado da palavra equipe. Ao Prof. Dr. Edmar Borges Santana, Diretor da Faculdade de Odontologia da Universidade Federal da Bahia, por seu apoio e carta de referência para a seleção do Mestrado.
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