2004 Volume 22 Issue 3 Pages 186-194
The purpose of the current study was to investigate the effect of surface preparations on bond strength to heat-pressed ceramic material (IPS Empress 2, E2) of glass-ionomer luting materials. The E2 specimens were employed as the adherend materials and E2 surface treatments for mechanical retention were; 1) etching with phosphoric acid, 2) etching with hydrofluoric acid (HF) and 3) air-abrasion with alumina. Surface treatments for chemical retention were silane treatments. Two conventional glass-ionomer materials and two resinmodified glass-ionomer materials were used as the luting agents. Shear bond strengths were determined after 24 hours.
The HF etching enhanced bond strength of all luting materials. Surface preparations for mechanical retention were effective for conventional glass-ionomer materials, nevertheless silane treatments gave negative effects. Application of the silane primer was effective for resin-modified glass-ionomer materials. Especially, conbined use of the surface preparation of HF and silane treatment was the most effective in enhancing bond strength of resinmodified glass-ionomer materials.
