Improved strength and durability of bond to a zirconia abutment material by means of surface modification techniques

YAMASAKI Masato

doi:10.11297/adhesdent1983.23.45

The objective of the current study was to investigate the effect of surface modification on bond strength and durability between zirconia implant abutment and heat-pressed ceramic superstructure. A zirconia material designed for abutments (ZiReal Post) and a ceramic material for tooth-colored restorations (IPS Empress) were employed as the adherend materials. The Variolink II composite-based material was used as the luting agent. The zirconia abutment surface preparations were; 1) wet-grinding with SiC paper, 2) Etching with 5% hydrofluoric acid for 60 seconds, 3) air-abrasion with alumina for 23 seconds, and 4) tribochemical silica coating with the Rocatec System, whereas the two priming conditions were; a) priming with the proprietary silane primer for the luting agent (Monobond-S), and b) no silane priming. The zirconia abutment and heat-pressed ceramic materials were bonded together with luting agent. Shear bond strengths were determined both before and after thermocycling (5 and 55°C, 20, 000 cycles).<BR>Mechanical retention is an important factor for adhesive bonding to zirconia abutment. Application of the Rocatec System was effective for enhancing bond strength to the zirconia material of the Variolink II luting agent. Combined use of tribochemical silica coating with Rocatec System and silane primer produced the greatest bond strength.

Improved strength and durability of bond to a zirconia abutment material by means of surface modification techniques

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