Effect of surface treatment on roughness and bond strength of a heat-pressed ceramic

Influence of silane heat treatment on bond strength of resin cement to a feldspathic ceramic

“…The commonly applied surface conditioning feldspathic ceramic is HF acid etching followed by silane application [7][8][9] . The hydrofluoric acid reacts selectively with the silica present on the microstructure of ceramic forming hexafluorsilica.…”

“…The feldspathic ceramics are classified as acid sensitive materials that suffer from surface degradation by hydrofluoric acid gel (HF). HF application creates a topography favoring micro-mechanical retention [5][6][7][8] due to selective dissolution of glass matrix that is identified as retentive micro-pores, fissures and grooves on the conditioned ceramic surface 4,[8][9][10][11] . The cementation process of a prosthetic restoration is the final step of operative treatment after a series of procedures.…”

Effect of air-abrasion on the retention of zirconia ceramic crowns luted with different cements before and after artificial aging

“…The air-abraded groups showed significantly higher retention than as received groups (p<0.001). The increase of retention corresponds to the increase of micro-roughness on the surface of the air-abraded zirconia [53,82]. Surface roughness enhances the micromechanical interlocking of luting agents to ceramic surfaces [86].…”

“…Common treatment options are grinding abrasion with diamond rotary instruments [48][49][50], airborne particle abrasion with aluminum oxide [51][52][53], acid etching [53][54][55], silica coating and silanization [48,[56][57][58] and combinations of these methods.…”

Insights on Ceramics as Dental Materials. Part II: Chemical Surface Treatments

“…The lowest mean shear bond strength obtained was a ceramic surface treated with 50% phosphoric acid bonded to enamel, 2.7±0.8 MPa, and bonded to dentin, 1.5±0.1 MPa. It was observed that 9.5% hydrofluoric acid produced the roughest surface on leucitereinforced ceramics by using a surfanalyzer, which measures surface roughness by calculating the average height of irregularities from mean line within sampling mean length [22]. Reported microtensile bond strength values for lithium disilicate ceramics etched with 9.6% hydrofluoric acid for 2 min had a higher bond strength, 41.7±6.7 MPa, than those etched with 4.0% acidulated phosphate fluoride for 2 min, 19.1±2.6 MPa [23].…”