Dentistry – Method or material for testing – treating – restoring – or... – Cleaning
Patent
1992-03-11
1993-02-23
O'Connor, Cary E.
Dentistry
Method or material for testing, treating, restoring, or...
Cleaning
A61C 1500
Patent
active
051885328
ABSTRACT:
The cutting of tooth or bone tissue with laser radiation is enhanced by giving the radiation a polarization P parallel to the surface of the tissue being cut. For enlarging a tooth canal, laser radiation is delivered via an optical fiber which is introduced into the canal and is tapered in the region of its distal end. To fill a canal, an optical fiber having a low melting point is introduced into the canal and radiation is conducted through the fiber to melt the fiber and form the filling. The fiber may be coated with a material which will be melted by the radiation and will bond to the canal wall. Fillings and coatings are formed on tooth or bone tissue by projecting toward a surface of the tissue two starting components which when combined and exposed to light of a selected wavelength undergo a photochemical reaction to form a calcium containing product, and causing light of the selected wavelength to impinge on the components at least partially before they reach the surface in order to create the reaction and cause the resulting calcium containing product to bond to the tissue. Bacteria on a tooth surface are destroyed by staining the bacteria to cause the bacteria to have a dark coloration, and exposing the stained bacteria to laser radiation at a wavelength and energy level sufficient to destroy the bacteria.
REFERENCES:
patent: 4273535 (1981-06-01), Yamamoto et al.
patent: 4940411 (1990-07-01), Vassiliadis et al.
patent: 5030090 (1991-07-01), Maeda et al.
patent: 5055048 (1991-10-01), Vasslliadis et al.
"Der Laser und Seine Bisherige Anwendung in der Zahnmedizin" by J. Vahl; Hippokrates; Jg. 42, Heft 4, 1971.
"In Vivo Caries Removal Utilizing the YAG Laser" by T. Myers; Journal of Michigan Dental Association; 67: 66-7; 1985.
"Laser Effects on Tissue and Materials" by T. Kinersly; J. Amer. Dent. Assn.: vol. 70; 594; Mar. 1965.
Endo Technic Corporation
O'Connor Cary E.
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