Finisher set

Details Finisher set Finisher set

2000-04-11

2001-10-02

Lucchesi, Nicholas D. (Department: 3732)

Dentistry

Apparatus

Tool bit

C433S166000

Reexamination Certificate

active

06296485

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a finisher set for the cosmetic aesthetic treatment of teeth.
BACKGROUND OF THE INVENTION
The prior art already discloses finishers for the cosmetic aesthetic treatment of teeth; these finishers are offered as a set. Such a set comprises three finishers which are used one after the other. Each of said finishers comprises a conical head which is provided with straight cutting edges extending towards the tip. A finisher with eight cutting edges is used for prefinishing work, and in a subsequent working step the surface is treated with a second finisher having 16 cutting edges. To achieve a satisfactory and absolutely smooth surface, a finisher with 30 cutting edges is used in a subsequent third working step for obtaining an excellent, optically flawless surface with the help thereof.
When used as a set, the known finishers offer the possibility of generating high-quality surfaces, but have the drawback that the dentist needs three preparation instruments that must be used in successive order. In addition to the number of instruments needed, it is also necessary to change the same.
SUMMARY OF THE INVENTION
According to aspects of the present invention there is provided a finisher set which can be manufactured and used in an easy manner and at low costs and which reduces the number of instruments as well as the necessary treatment steps.
According to some aspects, the invention provides a finisher set which comprises a first finisher including a head with helical or twisted cutting edges and a transverse cut, as well as a second finisher including a head with helical cutting edges.
According to some embodiments of the invention, there is a finisher set for the cosmetic aesthetic treatment of teeth, comprising a plurality of finishers each comprising a shaft adapted to be clamped into a drive means, as well as a conical head provided with cutting edges, characterized in that a first finisher comprises a head with helical cutting edges and a transverse cut, and that a second finisher is provided with a head having helical cutting edges. The first finisher can have eight to sixteen cutting edges. Preferably, the first finisher has twelve cutting edges. The first finisher can include cutting edges having a helix angle of 5° to 15°. Preferably, the first finisher includes cutting edges having a helix angle of 10°. The second finisher can have sixteen to twenty-four cutting edges. Preferably, the second finisher has twenty cutting edges. The second finisher can have cutting edges having a helix angle of 20° to 30°. Preferably, the second finisher is provided with cutting edges having a helix angle of 25°. Finishers can be made from any dental compatible abrasive compound. Preferably, the finishers are made from cemented carbide.


REFERENCES:
patent: 2109086 (1938-02-01), Coussement et al.
patent: 2902763 (1959-08-01), Heppe
patent: 4389192 (1983-06-01), Neuwirth
patent: GM 77 16 979 (1977-10-01), None
patent: 197 34 016 (1999-02-01), None

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