Estudo da microinfiltração na interface localizada entre a resina acrílica e o material resiliente em prótese total.

Abstract

The denture soft lining materials are used at the dentistry clinic, providing comfort to the patients that utilize these prosthesis. However, the microleakage in dentures at the located interface between the acrylic resin base and the soft lining materials, confectioned of acrylics or silicones, has been pointed as an important factor of detachment between these two materials. Therefore, the respect of this subject was objectified to carry through a bibliographical revision about microleakage. In this research it was observed that the dentures lined with resilients materials, do not have a satisfactory longevity, in its majority, therefore they suffer diverse types of you damage, among them microleakage, many times disabling the continuity of its use. This constant necessity to substitute denture, or to restitute the material resilient has been motivated, to a large extent, for the detachment of the soft lining material. This research pointed and argued some factors capable to intervene with the phenomenon of microinfiltration; and concluded that the used methods - addition of an adhesive film and/or application of a sealant product in the external portion of the interface - with intention to solve or to minimize this problem, they have been efficient, diminishing the deleterious effect of microleakage and delaying the detachment. The microleakage of liquids between the rigid base and the soft denture liner occurs all time that this part is displayed to buccal fluids. The microleakage in the interface, not only propitiates, as also provokes the detachment of the soft material. It was also verified that, none of the soft denture material available, presents ideal properties of perfect adhesion to the rigid denture base that hinders microleakage in the interface between these two materials.