Tratamento de superfície das cerâmicas de dissilicato de lítio para a cimentação resinosa

Abstract

The use of pure ceramics in prostheses and inderec trestorations has been widespread in dental practice, mainly replacing the consecrated metal- ceramics crowns and it is an excellent choice when seeking aesthetic prosthetics. Inserted in this context are the ceramic and glass ceramic, in which priority aesthetic and adhesiveness in the developement of the materail, allowing high values of bond retention system when adhesives and resin cements are used. These materials, however, are less mechanically resistant compared to ceramic systems rich in alumina and zirconia. Among the ceramics rich in silica, is the glass ceramic rich in silica, is the glass ceramic reinforced with particles of lithium disilicate which provide improved mechanical properties to the material, making it possible to reconcile excellent esthetics and high strengt. However, there is no consensus on the postulation of indications of surface treatment techniques of this material for proper use of the cementing agent. Therefore, the purpose of this paper is to review the literature on the effect of various surface treatments of ceramic lithium disilicate on the bond strength of resin promoted by cementation. The discussion of this study makes it possible to conclude that the basic procedures for the surface treatment are etching with hydrofluoric acid, followed by washing and drying and subsequent application of silane, followed by drying without the need for additional procedures. Also infers that there is still a lack of consensus about appropriate time of etching the surface of the ceramic lithium disilicate.