Objective Evaluating the bond strength of fiberglass posts cemented with different resin cements. Materials and Methods: Seventy freshly extracted roots of healthy human canines were endodontically treated and prepared to receive fiberglass posts. The roots were randomly divided into seven groups: (G1) RelyX ARC, (G2) Enforce, (G3) BisCem, (G4) Duo-Link, (G5) Cement Post, (G6) Variolink II, and (G7) RelyX U200. After post cementation, the specimens were sectioned perpendicularly to the root axis using a high-speed diamond disc, totaling 340 specimens. The strength values obtained in the push-out test were submitted to two-factor ANOVA and Tukey test (p = 0.05). Results: The root thirds (p = 0.001) and the type of cement (p = 0.001) influenced the bond strength values. The relation between these two factors was also significant (p = 0.011). Conclusions: The bond strength of self-adhesive resin cements was significantly higher as compared to other cements. Besides the cervical third in roots cemented with conventional cements types presented the highest bond strength values (p < 0.05).

If appropriate clinical conditions exist, immediate dentoalveolar restoration may be the most conservative means of reconstructing the buccal bone wall after immediate implant placement followed by immediate provisionalization with predictable healing and lower treatment time.

Objetivo: O presente trabalho teve por objetivo avaliar as principais dificuldades relatadas por estudantes do último ano do curso de Odontologia na execução de procedimentos periodontais básicos e cirúrgicos. Métodos: Um questionário proposto com 24 questões, sendo 14 referentes a procedimentos periodontais básicos e 10 a procedimentos cirúrgicos foi aplicado em 45 alunos de graduação com trabalhos envolvendo tais procedimentos durante as atividades práticas da Disciplina de Clínica Integrada, disciplina obrigatória da grade curricular do curso, ministrada aos alunos do último ano. Os alunos foram questionados quanto à percepção individual de dificuldades quanto a execução dos diversos passos referentes aos tratamentos avaliados. O grau de dificuldade individual foi determinado segundo a escala Likert em 0 = nenhuma, 1 = leve, 2 = moderada, 3 = alta e 4 = muito alta. Aplicou-se a análise exploratória dos dados obtidos e adicionalmente, o grau de dificuldade foi dicotomizado em nenhuma a leve (escores 0 e 1) e moderada a muito alta (escores 2 a 4). Resultados: Com relação ao tratamento periodontal básico, a sondagem do nível ósseo foi o procedimento com maior quantidade de alunos em dificuldade (57,5%). Para as dificuldades relatadas por estudantes relacionadas às etapas de uma cirurgia periodontal apenas os procedimentos relacionados a anestesia e remoção de sutura não apresentaram relatos de dúvidas. Conclusão: O procedimento cirúrgico periodontal foi o que envolveu maior prevalência de dúvidas relatadas de forma moderada a muito alta, sendo a indicação da técnica cirúrgica adequada, a etapa com a maior porcentagem de dúvidas (66,6%) entre os graduandos.

This study compared the tensile strength and fracture mechanism of tungsten inert gas (TIG) welds in cylindrical rods of commercially pure titanium (cp Ti) with those of laser welds and intact samples. Thirty dumbbell-shaped samples were developed by using brass rods as patterns. The samples were invested in casings, subjected to thermal cycles, and positioned in a plasma arc welding machine under argon atmosphere and vacuum, and titanium was injected under vacuum/pressure. The samples were X-rayed to detect possible welding flaws and randomly assigned to three groups to test the tensile strength and the fracture mechanism: intact, laser welding, and TIG welding. The tensile test results were investigated using ANOVA, which indicated that the samples were statistically similar. The fracture analysis showed that the cpTi samples subjected to laser welding exhibited brittle fracture and those subjected to TIG welding exhibited mixed brittle/ductile fracture with a predominance of ductile fracture with the presence of microcavities and cleavage areas. Intact samples presented the characteristic straightening in the fracture areas, indicating the ductility of the material.

O presente estudo avaliou a prevalência de sintomas de disfunção craniomandibular (D.C.M.) em sessenta pacientes desdentados totais portadores de próteses totais duplas (Grupo 1) comparados com sessenta pacientes dentados naturais (Grupo 2 ). Todos os pacientes entrevistados pertenciam à faixa etária de 50 a 70 anos, procedimento que visou minimizar a influência da idade nos resultados da investigação. Os dados foram levantados por um único examinador a partir do histórico dental e de um índice anamnésico. A partir dos resultados obtidos, foi possível observar que 55% dos desdentados portadores de prótese total e 61,7% dos dentados naturais apresentavam algum grau de DCM, diferença não comprovada estatisticamente (P>0,05). Este trabalho sugere que a perda dos dentes e o uso de prótese total não influenciam na presença de sintomas de DCM.

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Objectives: For decades, the dental community has discussed which materials would be the ideal substitutes for lost tooth structure. Initially, the biomimetic approach advocated that feldspathic ceramics would be the material of choice for enamel. However, given the complexity of obtaining excellent dental technicians and the financial cost, are composite resins a suitable replacement? The optical properties with opalescence and fluorescence effects, as well as this material's high fracture toughness, indicate it as a long-lasting restorative material. However, because this material depends on the operator's expertise, knowledge of layering techniques and the selection of each material for the different layers is required. Thus, knowledge of the polychromatic technique through a bioinspired approach is necessary to obtain results of life-like restorations. This article aims to review the polychromatic layering technique (PLT), considering the optical and mechanical properties of dentin and enamel and correlating these properties with current composite resins to guide clinicians in selecting the most suitable restoratives for their clinical challenges. Clinical Considerations:The polychromatic layering technique is revisited, crossreferencing the properties of dentin and enamel with current composite resin restoratives and their biomimetic properties. The effectiveness and predictability of the PLT are corroborated in clinical cases of varying degrees of difficulty requiring different layering strategies. Conclusion:After the bio-inspired analysis, using nature as a model to be understood and followed, it is possible to note how the polychromatic technique remains current and viable in mimicking nature, providing esthetic and natural results in the layering of composite resins.Clinical Significance: Composite resins effectively replicate the optical and mechanical characteristics of natural dentin and enamel through the bioinspired approach presented by the polychromatic layering technique.

The utilization of the biomimetic concept to increase a disharmonic smile with dental defects is based in a conservative approach, which reached a satisfactory and esthetic outcome.