| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that a dental plaque removing effect and a massaging effect to periodontium are limited in a conventional ultrasonic toothbrush having an ultrasonic vibrator mounted to the brush part of a toothbrush since ultrasonic waves emitted from the ultrasonic vibrator has a single frequency. <P>SOLUTION: This ultrasonic toothbrush is provided with implanted brushes and a support member for supporting the ultrasonic vibrator. The ultrasonic vibrator is supported by the support member between the brushes at a brush part, and vibrations of two frequencies are emitted from the ultrasonic vibrator. Thus, the dental plaque removing effect and the massaging effect to periodontium are prevented from being limited. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
