| 摘要 |
A method and apparatus for cleaning the teeth and massaging the gums are described in which a pulsating jet of liquid is pressure modulated, the modulation frequency being substantially lower than the frequency of the pulsations, and the modulated pulsating jet is directed against the surfaces to be treated. The pulsation frequency may be in the range of 600-6000 pulses per minute, and advantageously above about 3000, to clean the teeth effectively. The modulation frequency may be in the range of 70-600 cycles per minute, and advantageously less than about 300, to massage the gums effectively.
|
