Dentistry – Apparatus – Tool bit
Patent
1987-07-02
1989-05-16
Jones, Larry
Dentistry
Apparatus
Tool bit
433142, 433229, A61C 306
Patent
active
048306150
ABSTRACT:
Disclosed herein are embodiments of dental instruments having their surfaces formed with abrasive coatings which are used for both cutting and polishing functions. In each of the instruments disclosed herein, the abrasive surface consists of a plurality of regions with each region having a distinct degree of coarseness or fineness different from the degree of abrasion of which other regions consist. In some of the instruments, the finer abrasiveness is on the end of the instrument whereas the coarser region is away therefrom, whereas in other instruments the coarser region is at the end. Other embodiments are disclosed which have alternating regions of coarseness and fineness. In some of the instruments, the interfaces between the regions define distinct changes in abrasiveness whereas in other instruments, these interfaces define gradual changes in abrasiveness.
REFERENCES:
patent: 750639 (1904-01-01), Graft
patent: 959054 (1910-05-01), Glover
patent: 2842844 (1958-07-01), Seal
patent: 3142138 (1964-07-01), Kean et al.
patent: 3267623 (1966-08-01), Block
patent: 4030198 (1977-06-01), Gerber
patent: 4178689 (1979-12-01), Nash
patent: 4187082 (1980-02-01), Guerra
patent: 4447208 (1984-05-01), Kawai
patent: 4563152 (1986-01-01), McClure
patent: 4690642 (1987-09-01), Kyotani
Pfingst & Company Inc., 1983 Catalog, No. 33, pp. 8, 17, 18 and 22-28.
Garber David A.
Goldstein Ronald E.
LandOfFree
Two-grit cutting and polishing instruments does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two-grit cutting and polishing instruments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-grit cutting and polishing instruments will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2319467