Bond strength between abrasion-resistant plastic teeth and photo-cured composite resin for crown was investigated to evaluate the effect of eight kinds of surface treatment. The shear bond strength of abrasion-resistant plastic teeth to photo-cured composite resin was measured using a universal testing machine at a crosshead speed of 1 mm/min before and after thermocycling.
The result were as follows:
1. The shear bond strength of water saturated abrasion-resistant plastic teeth to photo-cured composite resin was significantly less than that of dried abrasion-resistant plastic teeth.
2. The surface treatment with silane coupling agent, bonding agent, and methylene chloride did not enhance the shear bond strength between abrasion-resistant plastic teeth and photo-cured composite resin.
3. The air abrasive treatment showed significant higher shear bond strength than no treatment.
4. The air abrasive treatment plus bonding agent showed the greatest bond strength and durability of all treatments.
It was concluded that the air abrasive treatment was effective for strengthening the shear bond strength of abrasion-resistant plastic teeth to photo-cured composite resin. All surface treatments without air abrasive treatment did not enhance their shear bond strength in service.