Method and device for determining the centric position of human teeth
AssigneeKaltenbach & Voigt GmbH & Co.
InventorHans Walter Lang
Life of this patent
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Abstract
The invention concerns methods and a device for the determination of the centric position of a human set of teeth with improved precision. This is needed for the adjustment of an articulator in the production of dentures. For this purpose a plurality of successive bite movements or displacement movements of the lower jaw are recorded in form of electronic signal data and evaluated for the determination of the centric position.
Claims13
Method for determining a centric position of a human set of teeth, comprising causing a patient's lower jaw to carry out at least one movement with respect to the patient's upper jaw and evaluating at least two movements to determine the centric position,
- further comprising
- causing the lower jaw in a bite end position to carry out a plurality of first displacement movements running between forward and rearward end positions as well as a plurality of second displacement movements running between lateral end positions,
- detecting the first and second displacement movements with measurement technology,
- converting the first and second displacement movements into electrical signal data, and
- evaluating the signal data to the effect that an intersection point between the first and the second displacement movements yields the centric position.
A device for determining a centric position of a human set of teeth, the device comprising:
- a first carrier frame having four outwardly extending arms, each arm being separated from the other arms and each arm carrying two downwardly directed ultrasound microphones, the first carrier frame being adapted to be mounted on a human head;
- a second carrier frame that is adapted to be attached to a lower jaw of a human head with a bite fork, the second carrier frame having a plurality of upwardly directed ultrasound transmitters,
- wherein the ultrasound microphones and the ultrasound transmitters define a plurality of measurement sections that are evaluated to determine the centric position.
Dependencies are inferred from the claim text.