Ultrasonic shaping instrument

Details Ultrasonic shaping instrument Ultrasonic shaping instrument

2007-02-06

2007-02-06

Rodriguez, Cris L. (Department: 3732)

Dentistry

Apparatus

Having motor or means to transmit motion from motor to tool

C433S086000

Reexamination Certificate

active

10479165

ABSTRACT:
The invention concerns an ultrasonic shaping instrument comprising: a mount structure (10), a sonotrode (14) elastically mounted on the mount structure (10), a tool (16) fixed to the sonotrode (14) for carrying out shaping operations, and a control member (12) for controlling and powering the sonotrode (14). The instrument is dimensioned so that the assembly consisting of the sonotrode (14) and the tool (16) has a resonance ultrasonic frequency fo, in a mode selected among traction-compression and torsion, variable between a lower limit fomin and an upper limit fomax, and it does not have itself any other resonance frequency in a range between a frequency fpmin<fomin and a frequency fpmax>fomax.

REFERENCES:
patent: 4371816 (1983-02-01), Wieser
patent: 5059122 (1991-10-01), Hetzel
patent: 5294896 (1994-03-01), Kjellander
patent: 6190167 (2001-02-01), Sharp
patent: WO 89/01763 (1989-03-01), None

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