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Currently, the tooth bleaching became a procedure very looked and used in the clinic dental, in function of the aesthetic valuation. The decision of bleaching always comes of the aesthetic necessity of the patient. The objective in this work is to present a clinical case of internal and external bleaching of pulped teeth being approached the materials, the technique and the cares that we must take in the hour of the intervention, so that let us can get the desired success. The treatment consisted of the association of the perborato of sodium with distilled water (folder), also showing the cares that if must have at the moment of the procedure. The clinical results had allowed to conclude that the efficiency of the use of the water distilled in substitution to hydrogen peroxide if makes gift, beyond the refined criterion in the choice of the bleaching treatment.

At reporting of any clinical case, it always would be interesting to point out the many reasons that gave support to the chosen treatment options, during all the developed steps, as expose the reasons that were used as a base to the choice of the employed procedures. With this philosophical focus, it is here presented a clinical case, involving substitution of amalgam by composite resin, in two upper left tooth from the posterior region (24 and 25), realized in a male patient that was treated in the Pos-graduation Clinic, at Bauru Dental School - USP. In the two involved premolars, the defective amalgam was substituted by Filtek Supreme, a composite resin, after realization of a general clinical evaluation, followed by anamnesis and analysis of the respective initial radiographies. In the way, besides a detailed description of clinical case, it were pointed out the reasons that served as basis to the choices of different procedures, beginning with explanation of why composite was elected to substitute amalgam.

Dental cements must present satisfactory mechanical properties in order to support masticatory forces and occlusal loads in the oral cavity. The punch shear strength is a simple and efficient method to evaluate the strength of a material, by means of an axial load applied to dislocate one or several materials. Thus, the objective of this work was to evaluate three dental cements (a zinc phosphate, a glass-ionomer, and a resin cement) as to their punch shear strength. For this test, specimens in a ring form matrix with dimensions of 14mm of internal diameter and 1.5mm of height were made, allowing for a disc of the materials with these dimensions to be obtained, which was placed in an adequate testing device. Ten specimens of each material were analyzed for the respective test at periods of 1 and 24 hours. The results were statistically evaluated with the two-way ANOVA test, followed by the comparative Tukey’s test (5%). The dental cement which obtained the highest values of punch shear strength was the resin cement, whereas the glass-ionomer cement obtained the lowest values among all the analyzed materials in both periods.