Dentistry – Apparatus – Work support
Patent
1987-10-26
1989-12-12
Peshock, Robert
Dentistry
Apparatus
Work support
A61C 1100
Patent
active
048864536
DESCRIPTION:
BRIEF SUMMARY
The invention concerns the construction of a module of simple design, that is easy to handle, to form an apparatus with alignment, adjustment, measuring and display instruments for individual full prostheses with optimum accuracy in execution of the individual work processes.
This task is resolved with the invention by the characteristic features described in patent claim 1.
In addition, the purpose of the invention is to permit correct fixing of the lower jaw model for adjustment in articulators with this module, so that production of correctly positioned average bite templates related to mastication is possible at the same time with integrated centric scribing plates for drawing the "Gothic arch" for stylus registration.
A further task of the invention is to create a setting aid that is simply assembled and easy to handle, with which teeth can be set correctly aligned in lower jaw full prostheses, easily and securely. In addition, a setting aid for correctly aligned assembly of the right and left front teeth should be achieved with lower jaw full prostheses.
In addition, the purpose of the invention is to obtain an alignment aid with the module, to be used for adjustment of upper jaw models which are asymmetrical and vary in size, and can be used as reference points for the hard palate as well as the covering fold in the area of the labial frenulum.
In addition, the module shall comprise a impression plate as a bite template for the upper and/or lower jaw with or without stylus for a centric scribing plate, which shall be constructed separately for each jaw or usable for both jaws.
These tasks are resolved in the characteristic features of the subsidiary claims, which represent advantageous further forms of the features of patent claim 1.
The subject of the invention does not only extend to the features of the individual claims, but also to combinations of these.
The module as per the invention includes an instrument holder and interchangeable auxiliary instruments mounted on or in it, working in conjunction with each other and with the instrument holder, so that accurate adjustment is possible with easy handling for the individual work processes to be carried out with optimum accuracy in execution.
The instrument holder, which can be combined as an adjustment and levelling device, ensures sound fixing of the lower jaw models in an easy secure manner for production of bite templates or subsequent adjustment in the articulators to be used for setting.
By means of a levelling table that can be adjusted in height and inclination in any direction, and an alignment key which is adaptable in the instrument holder, by the possibility of adjusting the lower jaw model on the levelling table in the horizontal plane and by fixing with magnetic force, it is possible to determine the three salient alignment points in geometric terms of the articulator to be used. In addition, a bite wall template which can be fixed to the apparatus will permit exact alignment of the bite wall height and integration of a centric scribing plate for stylus registration.
Similarly the upper jaw model can be adjusted, but using the two hard palate sections and covering fold in the labium frenulum area as reference points. Moreover, with the upper jaw model, the bite wall height can be defined according to the mastication plane in conjunction with a bite wall template that can be fixed to the instrument holder.
With this apparatus, the geometrically correct position of the upper and lower jaw model can be determined individually for each patient within the articulator geometry, so that optimum seating of the prostheses can be achieved.
By means of the dome-shaped setting aid, teeth can be set at an inclination corresponding to the compensation curve formed by the dome, which can be defined exactly in relation to the values of the lower jaw model determined exactly using the adjusted inserts. By simple, optional adjustment of the insert or inserts, exact alignment on the central fissure line is possible. Positionally correct setting of the
REFERENCES:
patent: 2270561 (1942-01-01), Sanborn
Drucker William A.
Peshock Robert
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