Avalia o da topografia superficial de ceramicas submetidas a diferentes tratamentos de superfície

The purpose of this study was to evaluate the surface topography of Noritake, IPS e.max and Cercon ceramics after treatment with either airborne aluminum oxide particle abrasion or hydrofluoric acid etching. Six specimens of each ceramic (10mm x 10mm x 0,5mm) were fabricated and randomly divided into three groups: Group 1: without surface treatment (control); Group 2: airborne particle abrasion with 50--um aluminum oxide; Group 3: 10% hydrofluoric acid etching. The specimens were gold coated and examined using scanning electron microscopy. The 10% hydrofluoric acid increased the surface irregularities of Noritake and IPS e.max ceramics, but did not change the surface topography of Cercon ceramic. Airborne particle abrasion with aluminum oxide increased the surface irregularities of Noritake, IPS e.max and Cercon ceramics. It was concluded that hydrofluoric acid was effective only for Noritake and IPS e.max ceramics, and airborne particle abrasion was effective for the three ceramics.