This paper presents a multi-area research involving Dentists and Engineers, in which eight different types of diamond abrasive grains, which are used in dental burs (small diameter grinding wheels) were tested. The most appropriated grain to be used in burs was evaluated. These burs are used in dental equipment characterized by low torque and low spindle rotation. A test methodology was developed in order to evaluate the cutting capacity of these burs, using glass as a machining material. The results show that it was possible to verify that the grain structure and friability were the properties that affect the cutting capacity. Consequently, the best diamond grain is the one that presented, simultaneously, the best material removal conditions and the lowest price.
Diamond; grinding; abrasive grain
