Removing a post embedded in a tooth

Details Removing a post embedded in a tooth Removing a post embedded in a tooth

1992-03-05

1992-12-22

Hirsch, Paul J.

Dentistry

Method or material for testing, treating, restoring, or...

433224, 433229, A61C 500, A61C 502

Patent

active

051730499

ABSTRACT:
A process for cleaning and/or shaping passages, comprising providing an optical fiber having a diameter sufficiently small to be introduced into the passage and having a free end provided with a radiation focussing element; introducing the free end of the fiber into the passage so that the focal point defined by the radiation focussing element is located adjacent the region to be cleaned or shaped; providing a liquid in the passage at the location of the focal point of the radiation focussing element; and supplying pulses of laser radiation to the fiber so that the radiation exits the fiber via the free end to provoke a cavitation of vapor at the interior of the irrigating liquid.

REFERENCES:
patent: 4273535 (1981-06-01), Yamamoto et al.
patent: 4746292 (1988-05-01), Johnson
patent: 4940411 (1990-07-01), Vassiliadis et al.
patent: 4979900 (1990-12-01), Okamoto et al.

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