Objective The study aimed to evaluate the bond strength between lithium disilicate ceramic and resinous cement when silane (Prosil, FGM) was applied in different amounts of layers under heating or not. Materials and Methods Sixty IPS E-max CAD ceramic (Ivoclar) was used. They were conditioned with 10% hydrofluoric acid for 20 seconds. The samples were distributed in six groups (n = 10): 1Sil, 1 layer of silane without heating; 1SilAq, 1 layer of silane with heating; 2Sil, 2 layers without heating; 2SilAq, 2 layers with heating; 3Sil, 3 layers without heating; and 3SilAq, 3 layers with heating. After each layer, a jet of cold air was applied for 20 seconds in groups 1Sil, 2Sil, 3Sil, and jet of hot air (50°C) in groups 1SilAq, 2SilAq, and 3SilAq. Subsequently, an adhesive layer was applied, and fourcylinders were made on the ceramic with a resin cement AllCemVeneer and photoactivated for 20 seconds. The samples were stored at 37°C for 24 hours and analyzed to the microshear test at EMIC. Statistical Analysis Data were submitted to ANOVA and Tukey’s test (α = 0.05). Results The results showed that there was no statistical interaction between the factors studied. The “heating” factor was not statistically significant; however, the “silane layers” factor showed differences between groups. The analysis of the results showed that the use of one (66%) or two layers (67%) of silane regardless of heating, produced higher values of bond strength, when compared with the group of three layers (62%). Conclusion The use of silane with one or two layers provided a greater bond strength between lithium disilicate ceramic and resinous cement and that the heating did not influence the results.

O bruxismo é definido como uma atividade parafuncional do aparelho mastigatório, que constitui em ranger os dentes ou apertamento em estado de subconsciência. Mesmo o esmalte dental sendo o tecido mais duro do organismo, ele sofre perdas na sua estrutura mineral de forma irreversível. Essa fricçãopode atingir outros tecidos dentais causando sensibilidade, alterações periodontais, articulares e posturais. O paciente com tal distúrbio deve passar por uma avaliação completa para identificação da causa e sinais resultantes do ato. Em alguns casos é indicado o uso de placas miorrelaxantes, após reabilitação, mais só após uma avaliação detalhada e minuciosa pode se dizer se é indicada ou contraindicada o uso de facetas em porcelana em pacientes bruxistas. Esse trabalho trará informações com base nas obras literárias sobre as reabilitações com laminados cerâmicos em pacientes bruxistas, mostrando suas indicações e contraindicações. O objetivo central é o de apresentar uma revisão de literatura sobre a utilização de laminados cerâmicos em pacientes com bruxismo, buscando expor os pontos clínicos importantes para essa indicação. Concluiu-se que apesar de alguns autores apresentarem contraindicação para instalação dos laminados, outros autores apresentam que os mesmos podem ser indicados seguindo uma correta indicação; inclusive, defendem que seja tratada desde a etimologia do bruxismo.

The importance of correct diagnosis, planning and treatment of dental spots is extremely important during aesthetic rehabilitation. Aesthetic requirements have become increasingly common in current society, and direct composite resin restorations are indicated due to the great advancement and increasing improvements of adhesive systems and composite resins. This work presents the clinical case of an oral aesthetic rehabilitation involving direct composite resin veneers associated with dental bleaching. The patient CSM, female, 21 years old, without systemic diseases, attended the dental clinic of the Morgana Potrich Eirelli College (FAMP) complaining of the unsatisfactory aesthetic appearance of her teeth. After careful anamnesis and detailed intraoral and extraoral examination, we identified the presence of a white spot on the upper anterior teeth. The spot was smooth and shiny, did not have soft tissue, and was well delimited and located in the cervical region. These characteristics led to the diagnosis of inactive carious lesions in the facial surface of the upper anterior teeth. After the treatment planning and its approval by the patient, the treatment started. The composite resin veneers associated with dental bleaching were indicated for better aesthetic results. The results achieved were satisfactory and met the patient’s aesthetic requirements by means of a correct diagnosis, study, and adequate planning for the case.