JPH07112476B2 - Gothic arch tracer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Gothic arch tracer used for determining the horizontal position of the lower jaw in dental denture making in clinical practice.

[0002]

2. Description of the Related Art Conventionally, in the occlusal sampling performed at the time of manufacturing a denture, a vertical occlusal position, that is, an occlusal height diameter, is set,
The central occlusal position, which is a horizontal occlusal position, has been set. In this setting method of the central occlusal position, the mandible is moved horizontally at an appropriately set occlusal height, the movement path is drawn, the convergence point of the drawing path is determined, and this is set as the central occlusal position. The Gothic arch description has been said to be the most theoretical.
On the other hand, the Gothic arch drawing method includes two methods, an oral method for drawing in the mouth and an oral method for drawing outside the mouth.
However, the two conventional methods are mainly composed of two parts, a drawing needle and a drawing plate, which are fixed to the occlusal floor and mounted on the upper and lower jaws, and the patient is moved horizontally while both are occluded. Was performed by rubbing the film of the drawing surface coating agent applied to the drawing plate with a drawing needle to draw the movement path. The advantages and disadvantages of the oral method and the oral method are described below. Intraoral method The drawing needle and drawing plate are placed inside the occlusal bed through the occlusal ridge, and both are point-contacted in the mouth, so that the force applied to the drawing needle and drawing plate is maintained and stabilized in each occlusal bed. The movement of the lower jaw with the occlusal floor can be smoothly performed, while the drawing plate is installed in the mouth, so it is necessary to always visually check the drawing state and the current position of the lower jaw. However, there is a drawback that it is not easy to confirm malfunctions and identify the central occlusal position. Extraoral method A method in which the drawing needle and drawing plate are placed outside the mouth, which has the advantage that the drawing state can be viewed immediately and the current position of the lower jaw and malfunctions can be easily confirmed, while the main body of the device is placed outside the mouth. Therefore, there is a drawback that the force transmitted to the occlusal bed through the device is likely to impair the maintenance and stability of the occlusal bed, and to hinder the smooth and physiological movement of the lower jaw. In addition, in both the intraoral method and the extraoral method, a machine for applying a drawing surface coating agent to a hard drawing plate surface to form a film and then sliding the film with a drawing needle in order to smoothly perform the drawing motion. Since it was a physical drawing method, it was not possible to use paper and it was difficult to keep a record with a medical record.

[0003]

Although the determination of the horizontal position of the lower jaw by the Gothic arch description method is theoretically the most correct, the conventional mechanical description method
Since it has the drawback that accuracy, operability, and record preservation are not satisfied at the same time, its clinical use is limited. The present invention aims to solve the above drawbacks by an electronic drawing method using a microcomputer system.

[0004]

[Means for Solving the Problems] In the conventional digitizer, the coordinates are detected by the magnetostriction method, but in this method, the change in the magnetic flux due to the magnetostrictive wave on the digitizer surface is detected by the coil inside the cursor. Since the signal line drawn out had to be pulled, there was a problem in the operability of the cursor. However, a new digitizer has been developed that uses an amorphous alloy thin film on the digitizing surface and includes it in a detection coil, so that the cursor can be a permanent magnet and the cursor can be made wireless. In addition, instead of a cursor, a pen-shaped stylus was developed, making it easy to replace the mechanical writing needle with an electronic writing needle. The present invention uses a digitizer capable of using such a wireless position specifying device as a means for constructing a writing plate and a writing needle of a Gothic arch tracer. We realized the purpose of inputting the signals related to the two-dimensional movement path of the mandible drawn to the external microcomputer system and electronically drawing.

[0005]

[Operation] While the digitizer body and the position specification device are in point contact with each other in the mouth, a signal regarding the position of the lower jaw can be input online to the microcomputer, so that the upper and lower jaw occlusal floor can be maintained and stabilized during the Gothic arch drawing. Good, does not interfere with physiological mandibular movement. Since the position signal of the lower jaw can be input to the microcomputer online, the two-dimensional movement path and the current position of the lower jaw by the intraoral method can be processed by the software and displayed on the display outside the mouth. It is possible to reduce the functions related to analysis, display, printing and recording that a computer system has.

[0006]

【Example】

(B) Fix the battery-driven digitizer body (2) to the digitizer plate (1) using the bolts and nuts (3). (B) The stylus pen is fixed to the position specifying device plate (6) as the position specifying device (7). (C) The signal from the Gothic arch tracer configured as described above is transferred to the Gothic arch drawing system including a microcomputer, color display device, color printer, floppy disk device, etc.
Allows connection to a microcomputer via cable (4) and connector (5).

[0007]

By using the Gothic arch tracer according to the present invention, the signal sent from the digitizer can be input to the microcomputer online as the position information of the lower jaw. Therefore, the input signal can be input to the microcomputer. It is processed by software to analyze the central occlusal position, central position, tapping point, habitual occlusal position, left and right deployment angle, etc., and display them by color, or enlarge and display the vicinity of the central occlusal position for position recognition It is easy to increase the accuracy. By storing the information input to the microcomputer on a floppy disk incorporated in the Gothic arch writing system, it can be used for examination and diagnosis of the jaw function by superimposing it on past records. With a printer built into the Gothic arch drawing system, you can print a record of the drawing path, analysis results, etc. on a sheet of paper and save it by attaching it to the chart.

[0008]

[Brief description of drawings]

FIG. 1 is a perspective view of the present invention.

[Explanation of symbols]

 1 Digitizer board 2 Digitizer main body 3 Bolts & nuts 4 Cable 5 Connector 6 Positioning device plate 7 Positioning device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06F 19/00 G06F 15/42 Z

Claims (1)

[Claims] 1. A set of digitizers comprising a digitizer body (2) installed on a digitizer plate (1) and a position specifying device (7) installed on a position specifying device plate (6), A Gothic arch tracer characterized by being used as an input device for a Gothic arch drawing system using a computer.