Dentistry – Apparatus – Work support
Patent
1983-04-11
1985-06-11
Peshock, Robert
Dentistry
Apparatus
Work support
A61C 1100
Patent
active
045225915
DESCRIPTION:
BRIEF SUMMARY
The subject of this invention is an articulator for mounting dental models with a stationary base for the lower jaw model and an upper part, which is attached thereto in such a way that it can be swiveled, for holding the upper jaw model, with mountings in the upper part and in the base for the jaw models.
Articulators of very different types are already known. By holding the dental models, these are devices which make it possible to reproduce the movement of the jaws with respect to each in the best possible manner. The model of the upper jaw is attached to the swiveling upper part of the articulator and the model of the lower jaw is attached to the stationary base, both models consisting of a cast reproduction of the teeth. The models are attached by means of, e.g., metal plates or other fasteners which can be detached on the lateral face of the articulator and which are preferably cemented into the lateral face of the cast. The alignment of the two dental models in the articulator is achieved by first taking the bite in wax, which is then placed between the two dental models in such a way that the teeth of these casts are aligned with respect to each other in the same way as they are in the mouth of the patient, however with the plaster material for attaching the metal plate still being soft enough to enable the alignment of the casts in the articulator. In the position wherein the areas are aligned with each other according to the bite taken, the two dental models are allowed to set until the plaster has dried. Subsequently, it is possible to work on the tooth models in the articulator. These well-known articulators have disadvantages insofar as cementing in the tooth models in connection with the metal plates requires too much work and time. Furthermore, the tooth models thus aligned with each other are restricted to use in the particular articulator and cannot be used in any other articulator; this makes it necessary to always send the jaw models, if required, together with the articulator employed, e.g., from the dental laboratory to the dentist and vice versa, a fact which is inconvenient as well as expensive.
It is therefore the goal of this invention to avoid the disadvantages mentioned above and to create an articulator in which the jaw models can be mounted without the use of plaster, thus making possible a random transfer from one articulator to the next.
According to this invention, this goal is achieved by the fact that the mounting for the maxillary model is designed such that it can be randomly adjusted in three planes perpendicular to each other and such that it can be locked into position in each of the positions. By thus designing the mounting as described by this invention, it is possible to always obtain an accurate coordination of the two jaws relative to each other by means of the bite taken in wax. This means that the fasteners for the jaw models are no longer attached to the models in such a way that they are dependent upon the articulator; instead, the shape and attachment of these fasteners is such that the models can be accurately fitted into each articulator without restricting the coordination of the models relative to each other to one particular articulator, but rather allowing in accurate adjustment of these models to be undertaken in any articulator designed according to this invention. This also renders the time-comsuming plaster casting heretofore required superfluous. Moreover, it is no longer necessary to ship the jaw models along with the articulator; instead it suffices to ship the jaw models only, since due to the free mobility of the upper mounting and the adjustability of the height of the mountings to each other it is possible to locate the exact jaw position with accuracy. The articulator can then be locked into this precise position.
Furthermore, this invention also refers to a device for the production of a dental-mechanical working model, such as is described in detail in German Patent Application P 28 56 963.3, and to this extent reference is made to the fu
REFERENCES:
patent: 565326 (1896-08-01), Bragg
patent: 2571280 (1951-10-01), Naggi
Braun Frank D.
Putra Stanislav
Witt Walter
Ipco Corporation
Peshock Robert
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