Abstract
The present study aims at developing another method instead of toothbrush for removing dental plaque on teeth. The method is based on large pressure fluctuations from a cluster of micro air-bubbles, which is excited by ultrasound. The excitation condition concerning size of micro bubbles, number of micro bubbles, size of cluster, etc. is derived by a theoretical analysis. Experiments on pressure fluctuation measurement and artificial dental plaque removal are also made.
