Ultrasonic toothbrushes employing an acoustic waveguide

Details Ultrasonic toothbrushes employing an acoustic waveguide Ultrasonic toothbrushes employing an acoustic waveguide

2007-09-18

2007-09-18

Spisich, Mark (Department: 1744)

Brushing, scrubbing, and general cleaning

Machines

Brushing

C433S119000, C601S142000

Reexamination Certificate

active

11695580

ABSTRACT:
An oral hygiene device having an ultrasound transducer22and an acoustic waveguide24facilitating the transmission of ultrasonic acoustic energy to fluids in the oral cavity is disclosed. Preferred ultrasound operating parameters for operation in aqueous environments and in dental slurries are disclosed. Devices may incorporate a drive motor16for oscillating a device head23, acoustic waveguide24and one or more bristle tuft(s)26at sonic frequencies, and preferred sonic operating parameters are also provided. Multi-element piezoelectric transducer assemblies30, 40, and various control and communications features are disclosed. Oral hygiene devices disclosed herein achieve improved plaque and stain removal from the teeth as well as interproximal and subgingival regions, while enhancing the user experience, massaging the gums, stimulating dental tissue, and disrupting biofilm.

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