Dentistry – Apparatus – Tool bit
Patent
1996-07-02
2000-02-08
Wilson, John J.
Dentistry
Apparatus
Tool bit
433119, A61C 306
Patent
active
060222174
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a system or a tool or an insert for the removal of the defect in a tooth or for making a cavity in a tooth.
There are various causes which justify the making, by machining involving the removal of material, of a cavity in a tooth and the repair of the tooth by means of a treatment of the cavity. Such a measure may be effected e.g. for aesthetic reasons to remove an unsatisfactory form of a part of the tooth. In most cases, however, these measures are carried out for repairing an unhealthy tooth, namely for removing a carious defect. A further reason for a measure as described above can also be the exchange of tooth fillings which are unsatisfactory for a variety of reason.
2. Description of the Related Art
In DE 42 09 191 A1 there are described a device and a process for the treatment of natural hard tissue with the employment of oscillating tools. With this known device, to make an occlusal cavity, a tool is used which has at its surface geometrically defined cutting edges or has cutting edges of non-defined geometric form such as adherent diamond grains, which make possible working of the material of the tooth, with the removal of material, with the oscillating movement of the tool. With the tool, there is made a cavity having an inwardly converging peripheral wall the cross-sectional size of which is a multiple of the cross-sectional size of the tool and the cross-sectional form of which differs substantially from the cross-sectional form of the tool. The tool is held releasably in a handpiece by means of a mounting device. The tool has a fluid outlet, at a spacing to the rear from the handpiece head which receives the tool, through which outlet a flow of fluid, e.g. water or a saline solution, can be directed at the treatment site and onto the tool for the purpose of cooling and rinsing. Measures for filling the cavity and treating the tooth are not described in this document. This known device and this known process are not only work and time consuming so far as the preparation of the cavity is concerned but also with regard to the usual methods of filling the cavity, whereby in this respect demands are made on the practicability of the preparation work and treatment work, on the thereby necessary manipulability, on the firmness and load bearing and on the lifetime of the treatment.
The above described treatment measures in a tooth occur not only in its occlusal region but also in its lateral and approximal region. In particular approximal preparations and treatments are difficult to carry out because of a neighbouring tooth and the thus resulting restricted accessibility, whereby there is a danger of damage to the neighbouring tooth.
The treatment of a cavity with a laboratory-prepared inlay is work-intensive and correspondingly expensive. Further, the tooth to be treated can be definitively treated only in a second treatment session and thus with "double time". To reduce the outlay involved in a treatment, it has already been proposed to use inlays manufactured at the place of treatment, as is e.g. possible with the so-called computer controlled milling of inlays. Further, it has already been proposed to use for the treatment of cavities prefabricated inlays, whereby likewise a treatment in only one treatment session and thus at a "single time" is possible. With such a measure, however, special preparation and treatment measures are needed which are again time consuming and involve complicated manipulation and are expensive.
SUMMARY OF THE INVENTION
The object of the invention is to improve a system, an insert or a tool for removing a defect in a tooth.
According to one aspect of the invention, there is provided a material removing tool for working on a tooth to make a tooth cavity by oscillating movement, such tool comprising a shaft and an abrasive treatment section and characterized in that the abrasive section is formed by a working head having an abrasive working surface and an opposing smooth surface.
The invent
REFERENCES:
patent: 2924013 (1960-02-01), Wowra
patent: 2990616 (1961-07-01), Balamuth et al.
patent: 3133351 (1964-05-01), Von Seggern
patent: 3241239 (1966-03-01), Ellis
patent: 3924335 (1975-12-01), Balamuth et al.
patent: 4353696 (1982-10-01), Bridges
patent: 4526541 (1985-07-01), Hubschmid
patent: 4666405 (1987-05-01), Ericson
patent: 4696646 (1987-09-01), Maitland
patent: 4726770 (1988-02-01), Kurer
patent: 4993951 (1991-02-01), Schumacher
patent: 5098300 (1992-03-01), Zaki
patent: 5489208 (1996-02-01), Mandell
patent: 5505617 (1996-04-01), Skeppmark et al.
patent: 5531722 (1996-07-01), Van Hale
patent: 5567156 (1996-10-01), Hagne et al.
Kaltenbach & Voigt GmbH & Co.
Wilson John J.
LandOfFree
System for removing a defect in a tooth and insert or tool for s does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for removing a defect in a tooth and insert or tool for s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for removing a defect in a tooth and insert or tool for s will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1676594