JP2004049852A - Checkbite system for gothic arch tracer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a checkbite system for Gothic arch tracers that electronically obtains sufficient three-dimensional data for maxillomandibular relation at a checkbite position to enable the set-up of the power path of a semi-adjustable articulator without using any checkbite core. <P>SOLUTION: A setting means for the semi-adjustable articulator obtains simplified three-dimensional data for the upper and lower jaws by additionally measuring a vertical distance between a digitizer plate and a position specifying plate by means of an interarch distance measuring instrument at a jaw position measured with a Gothic arch tracer using a digitizer. It utilizes these data as checkbite data. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a method for setting a path of an articulator used for dental prosthetic treatment based on electronic data of a Gothic arch tracer and an intermaxillary distance measuring device based on the theory of a check bite measuring method. And a check bite system for a gothic arch tracer.
[0002]
[Prior art]
A gothic arch tracer using a digitizer as an input device (Japanese Patent Publication No. Hei 7-112476 / Japanese Patent Application Laid-Open No. 10-5255 / Japanese Patent Application No. 11-211045) was developed, and the horizontal position of the lower jaw was measured by a digitizer installed on a digitizer plate. The coordinate signal could be input to a personal computer.
However, the gothic arch tracer is only a two-dimensional measuring device for jaw movement, and although it can set the jaw position and the side tract angle of the articulator, it cannot measure the vertical element of jaw movement. With just one set of digitizers, it was not possible to set the sagittal angle of the articulator based on electronic measurement data.
For this reason, to set the sagittal path angle of the articulator, a Gothic arch tracer using a digitizer is used, but it is necessary to obtain a check bite core, and what is the theoretical simplicity of the check bite measurement method? In order to make accurate measurements and articulator settings, they needed sophisticated and delicate techniques that required experience and skill.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to set a channel for a semi-adjustable articulator without using a check bite core. It is an object of the present invention to develop a check bite system for a Gothic arch tracer, which can electronically obtain three-dimensional data of interchin relations, that is, check bite data.
[0004]
[Means for Solving the Problems]
According to the present invention, in a jaw position measured by a gothic arch tracer using a digitizer, the vertical distance between the digitizer plate and the position designation device plate is additionally measured by an intermaxillary distance measuring device, and the obtained jaw position is measured. The purpose is to adjust and set the path of the semi-adjustable articulator using simple three-dimensional data of the upper and lower jaws consisting of two-dimensional coordinates and the distance between the jaws as check byte data. A distance sensor was installed on a Gothic arch tracer as a position input device, and the first means was to electronically measure the jaw position and interchin distance, and after measurement, these were attached to an articulator Moved to the upper and lower jaw models and operated, and adjusted the articulator path setting mechanism so that the values of each measuring device on the upper and lower jaw models were equal to the respective values measured and recorded in the check bite position. To manipulate it is an second means.
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the invention will be described with reference to the drawings based on examples.
[0006]
FIG. In the embodiment shown in the figure, the sensor part of the intermaxillary distance measuring device using a linear position sensor as a sensor is installed in front of a position designating device plate of a Gothic arch tracer for the purpose of writing in the mouth, and a resistance is provided in a rear portion of the digitizer plate. It is a system that installs a film-type sensor of a membrane type digitizer and measures the two-dimensional coordinates of the jaw position by the intraoral method and the inter-chin distance at the position of the linear position sensor at that jaw position.
[0007]
FIG. In the embodiment shown in the above, the sensor part of the intermaxillary distance measuring device using a linear position sensor as a sensor is installed at the front part of the position designating device plate of the Gothic arch tracer with a central bearing for the purpose of drawing outside, and the digitizer plate This is a system in which a film-shaped sensor of a resistive film type digitizer is installed in the front part, and it measures the two-dimensional coordinates of the jaw position by the extraoral method and the inter-chin distance at that position.
Function and effect of the present invention
[0008]
According to the present invention, the relative horizontal positional relationship between the upper and lower jaws at the check bite position is two-dimensionally measured with one digitizer, and the relative vertical positional relationship between the upper and lower jaws is also measured with one jaw distance. One-dimensional measurement is possible with the device.
In the check bite position, the intermaxillary relationship between the upper and lower jaws thus measured was used as electronic check bite data. After measurement in the patient, the measurement system of the present invention was attached to the semi-adjustable articulator from the oral cavity. It is transferred to the upper and lower jaw models and put into operation, and by adjusting each adjusting mechanism of the semi-adjustable articulator so that the respective values indicated correspond to the measured values at the check bite position, the articulator is attached. It is possible to reproduce the relative jaw relation of the upper and lower jaws indicated by the patient in the check bite position on the semi-adjustable articulator using the upper and lower jaw models.
Therefore, the present invention does not require the use of a complicated measuring device or the acquisition of a check bite core, but is based on the check bite method and the electronic data obtained by a simple device. This has the effect that a road can be set.
A more detailed theory and a specific setting method are shown below.
[0009]
Generally, in order to define the position and orientation of an object, the three-dimensional coordinate values of X, Y, and Z in space and the X, Y, and Z axes that are orthogonal to each other are the rotation centers. In order to know the value of the rotation angle of the occlusal plane, it is necessary to measure at least 6 degrees of freedom, and a complicated measuring device is required. The measurement system according to the present invention is characterized in that the occlusal height is mechanically kept constant by the measurement, so that the measurement system of the present invention is transferred from the oral cavity to the upper and lower jaw models equipped with the articulator. In the environment, the occlusal height can be adjusted by matching the horizontal two-dimensional coordinate values based on the measured values while the position specifying device is in contact with the digitizer sensor surface or the central bearing is in contact with the digitizer plate. It is reproduced in the three-dimensional coordinate values indicating the in position in the space, can be matched.
Therefore, in the measurement by the Gothic arch tracer, there is a characteristic having a measurement value equal to the measurement of one point and three degrees of freedom, although the measurement is performed at one point and two degrees of freedom.
[0010]
On the other hand, normal forward movement of the lower jaw is defined as one that does not involve lateral deflection or lateral inclination of the occlusal plane.In this limit, the digitizer plate, which also functions as the occlusal plane plate, is positioned in front of the lower jaw. Generally, it is necessary to measure the angle of rotation of the occlusal plane about three axes, as it is clinically acceptable to assume that the movement does not produce horizontal rotation or lateral tilt However, in the measurement of the forward movement, it is possible to omit the measurement of the rotation about the intercuspid axis.
Therefore, in order to reproduce the relationship between the upper and lower jaws in the anterior check bite position on the articulator, fix the left and right lateral tract angles of the articulator to 0 degrees, and rotate the horizontal rotation element of the occlusal plane accompanying the forward movement. The jaw position was measured by mechanically eliminating the elements of the lateral inclination and the upper jaw of the articulator was moved backward from the reference position where the articulator was attached, and the horizontal position indicated by the digitizer was measured by the front check bite position. The upper and lower jaw and jaw by the intermaxillary distance measuring device measured at the front check bite position by adjusting the position of the head ball in a state where it matches the two-dimensional coordinate value of By adjusting and setting the sagittal passage of the articulator so that the value of the distance and the value on the articulator are equal, it is possible to adjust and set the inclination of the occlusal plane in the front-rear direction. is there.
Thus, for patients with functionally nearly normal mandibular forward movement, it is possible to set the mandibular forward movement path on a semi-adjustable articulator with only a simple electronic recording of the system. is there.
[0011]
In addition, when using the semi-adjustable articulator, the lateral limit movement path was reproduced by fixing the working-side head and setting the axis of horizontal rotation of the occlusal plane as the vertical axis passing through the center of the working-side head. Above, by adjusting the equilibrium lateral lateral tract angle adjustment mechanism horizontally and the equilibrium lateral sagittal tract angle adjustment mechanism vertically, the approximate path of the equilibrium condyle indicated by the patient is shown. There is a setting feature that it is reproduced three-dimensionally on an articulator.
This is achieved by operating the equilibrium lateral angle control mechanism on the semi-adjustable articulator to adjust the horizontal position of the upper and lower jaws at the check bite position on the lateral limit movement path based on the value indicated by the digitizer. The two-dimensional reproduction of the optimal position is at the same time an approximate reproduction of the horizontal rotation angle of the occlusal plane centered on the working head of the articulator. It is a characteristic.
In addition, the intermaxillary distance between the upper and lower jaw, which changes due to the forward inclination and the lateral inclination of the occlusal plane due to lateral movement, and the adjustment mechanism of the semi-adjustable articulator, uniquely correspond to the articulator equilibrium side. It is only a sagittal path angle adjustment mechanism, and by adjusting this to match the measured value, it is possible to approximately reproduce the vertical component of the lateral movement path.
Therefore, as long as a semi-adjustable articulator that does not have an adjustment mechanism on the working side and cannot independently set the forward sagittal angle and the lateral sagittal angle on the equilibrium side is used, the features of the mechanism and the adjustment method are used. Therefore, it is the most practical to perform the approximate setting of the jaw movement path only by the electronic recording of the present invention, and it can sufficiently withstand clinical use.
[0012]
The present invention utilizes the mechanical characteristics of a semi-adjustable articulator and simplifies it to a measurement system with only the measurement elements required for its setting, and adds one sensor to the Gothic arch tracer required for setting the jaw position. There is an advantage that electronic check byte data can be obtained in a series of operations in bite acquisition simply by equipping.
This makes it easy to set up a semi-adjustable articulator based on quantitative data, without the need for experience or skill, and anyone can incorporate the patient's jaw function into the production of a prosthesis. It can be used for producing more physiological and comfortable prostheses.
[0013]
FIG. According to the embodiment shown in (1), since the jaw position can be directly instructed and input by the position specifying device, there is an advantage that the gothic arch drawing path is sharp, but the moisture proofing ability is high and the closing pressure during drawing is high. It must be a digitizer sensor with mechanical strength that can withstand the temperature.
On the other hand, FIG. According to the embodiment shown in the above, since the tip of the rod-shaped contact portion of the stretchable linear position sensor also functions as a position specifying device, it becomes a coordinate input by a writing brush mechanism, and the lack of sharpness of Gothic arch drawing is disadvantageous. However, a digitizer sensor with low mechanical strength and poor moisture proof ability can be used in this system.
[0014]
The intermaxillary distance measuring device is not limited to a linear position sensor, but a magnet is installed at the tip of a position specifying device that uses a spring as a pen and a magnetic sensor is installed at the base of the pen to extend and contract the pen. Even those that measure the change in distance between the corresponding magnet and the magnetic sensor, have the advantage of being small and lightweight and easy to use, as well as sensing magnetism, ultrasonic waves, light, etc. without having the function of a position designation device. Even a non-contact type distance measuring device can be installed on a Gothic arch tracer and used as an intermaxillary distance measuring device.
[0015]
Gothic arch-check byte that is connected to a personal computer to which a Gothic arch tracer is connected through an A / D converter and an interface to operate the Gothic arch tracer in parallel or with integrated software. The configuration of the system is easy.
[0016]
In addition to reducing the physical burden on the patient who obtains the check byte core, it can significantly reduce the time required for measurement.In addition, since the check byte data is digital, it can be transferred and stored at a lab. It is convenient.
[Brief description of the drawings]
FIG. 1 is a perspective view of an embodiment of the present invention in which a linear position sensor is installed on a gothic arch tracer for oral writing, excluding a control circuit unit.
FIG. 2 is a side view excluding a control circuit unit of the embodiment.
FIG. 3 is a perspective view of an embodiment of the present invention in which a linear position sensor is installed on a gothic arch tracer for external writing, excluding a control circuit unit.
FIG. 4 is a side view excluding a control circuit unit of the embodiment.
FIG. 5 is a schematic view showing the operation of a patient in the embodiment of the present invention in which a linear position sensor is installed on a gothic arch tracer for oral writing.
FIG. 6 is a schematic view showing an operation on an articulator of an embodiment of the present invention in which a linear position sensor is installed on a gothic arch tracer for oral writing.
[Explanation of symbols]
1. 1. Position designation device plate 2. Position designation device Digitizer plate 4. Slit 5. Central bearing6. 6. Resistive digitizer sensor 7. Digitizer sensor film lead wire section 8. Digitizer sensor film connector 10. Digitizer control circuit side connector Connection code 11. 11. Resistive digitizer control circuit section Connection cable 13. Personal computer 14. Linear position sensor 15. Linear position sensor contact rod 16. Lead wire 17. Linear position sensor control circuit section 18. Maxillary bite floor 19. Maxillary bite 20. Lower jaw occlusal floor 21. Lower jaw bite 22. Upper jaw model 23. Lower jaw model 24. Articulator body 25. Articulator upper jaw 26. Articulator head

Claims (1)

In a Gothic arch tracer using a digitizer as a jaw position input device to a personal computer,
A check bite system for a Gothic arch tracer, wherein one sensor part of an intermaxillary distance measuring device comprising a sensor part and a control circuit part is installed in a Gothic arch tracer.

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