Dentistry – Apparatus – Having means to record or indicate jaw movement or position...
Patent
1993-02-12
1994-08-09
Mancene, Gene
Dentistry
Apparatus
Having means to record or indicate jaw movement or position...
A61C 1904
Patent
active
053360877
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a device for the intraoral determination of the two-dimensional mandibular movement and of the jaw closing force.
With a device based on the principle of the so-called supporting pin recording it is possible to determine measured values in a manner which provides an extraorally optical reproduction and/or further evaluation and recording of the measured values by means of electronic data processing which measured values represent an essential condition for a modern stomatological diagnosis and treatment.
The supporting pin technique which was already used extraorally by GYSI in 1908 and converted intraorally by McGrane in 1944 is known. In this connection the movements of the lower jaw in relation to the upper jaw are recorded by means of a recording stylus and a recording plate inserted in the opposite part of the jaw (Freesmeyer et al. "Supporting Pin Recording", in "Dental-Labor" 06/87). In addition a device is known for the intraoral recording of mandibular movements (DD-A-252 123), on which a secure and reproducible anchoring at the teeth is possible by means of spring flanks provided at the carrier system inserted in the jaw. This device has, however, the disadvantage that the manner in which the measurement results are determined does not enable modern methods of recording, evaluating, and filing to be used. The production of the measuring results cannot be monitored and a first evaluation of the measuring results produced intraorally mechanically cannot be made or cannot be made until the device has been removed from the mouth. A reliable division of the curve patterns produced is no longer possible because of multiple overwriting. A statistical and mathematical evaluation of the measuring results in order to improve the diagnostic findings cannot be effected directly but must first be prepared by the two-dimensional taking up of the measurement curve and digitalization. This results in additional costs and above all in delays so that a rapid diagnosis and application of a treatment is not possible.
A device is also known for analysing the articulation movement between upper and lower jaw (DE-A-3 806 028), on which the mechanical recording system is replaced by a contactless recording system. For this purpose radiation sources and receiver arrangements are provided in plates which can be inserted in the upper and lower jaw, from the relative positions of which the articulation movements can be determined. This device, however, because of the small space for expansions in the mouth, requires very special transmitter and receiver components, which with minimum space must have a high directive efficiency. The installation of the device is therefore relatively expensive.
All modified supporting pin techniques which have been known to date are based on the fact that by inserting a central supporting pin between the upper and lower jaw for uncoupling the occlusion, a physiologically correct, individual position of the lower jaw in relation to the upper jaw is obtained, which is reproducible. Research has shown, however, that the force component in the supporting pin axis which is generated at the time of the recording has a great effect on the geometrical behaviour of the mandibular movement so that a reproduction is only possible with the same force conditions.
The object of the invention is to create a device for the intraoral determination of the mandibular movement and of the jaw closing force, which at the same time picks up intraorally the two-dimensional mandibular movement and the expended jaw closing force.
To achieve this object a device is formed in accordance with the invention with a supporting pin carrier arrangement which can be inserted in the jaw and which holds a supporting pin and with a carrier arrangement which can be inserted in the opposite part of the jaw and which is provided with a counter plate in such a way that the counter plate is held at three points on a force sensor connected to the carrier arrangement. For this purpose the tip of the supporting p
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Heinze Rolf
Vogel Andreas
Wiesinger Klaus-Dieter
Lucchesi Nicholas D.
Mancene Gene
Transcoject Gesellschaft fur medizinische Gerate mbH & Co. KG
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