Abstract
In an attempt to determine how the degree of the experimental stain removal and roughness of the metallic plate would be affected by the brush using in handpiece with three different pastes and airpower abrasive system instrumentation, quantitative measurement and morphological studies were made.
The results obtained were as follows:
1. On the stain removal, the largest effect was obtained on the using C-powder, followed by Bpowder and A-powder under the brush using in handpiece. Air-power abrasive system obtained larger effect than the brush using handpiece.
2. On the roughness of the metallic plate, the largest defect was observed in using C-powder, followed by B-powder and A-powder under the brush using in handpiece. Larger defect was seen on the brush using handpiece than on the air-power abrasive system.
3. Stripe like defects were observed under the brush using in handpiece scanning election microscopically.
