JP2004160119A - Articulator adjusting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop an articulator adjusting system for performing occlusion impression based on electronic interarch relationship data and control for the articulator using a check cutting tool method by simultaneously measuring a jaw motion route and the interarch relationship required for setting the jaw position and adjusting the articulator by a personal computer. <P>SOLUTION: A Gothic arch tracer is loaded with a camera part of an electronic camera and an object for measurement, and an interarch relationship sensor for measuring the jaw position and the interarch relationship is formed by an organism and the articulator. The image formation position data on the sensor obtained by image-processing an image signal from the sensor is taken as the data on the jaw positions of the upper and lower jaws and the interarch relationship. The interarch relationship data on the organism and the articulator are made compatible with each other in three-dimensional relationship between the upper and lower jaws, and on a screen displaying the interarch relationship recorded on the organism, the interarch relationship on the articulator interlocking with the articulator motion is displayed by superposition in real time to be taken as a means for adjusting the articulator. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, image data indicating the relative and three-dimensional positional relationship of the lower jaw with respect to the upper jaw is input to a personal computer, and inter-jaw relation data obtained by image processing is graphically displayed on a display to set a jaw position. The present invention relates to a ko-coupling adjusting system for the purpose of adjusting a ko-coupling.
[0002]
[Prior art]
Conventional electronic pantographs for the purpose of adjusting the total adjustable coupling device are difficult to use for edentulous patients because a relatively large external device such as a face bow is attached to the patient. In addition, since the method is specialized for calculating the adjustment value of a specific combination, it cannot be used universally for adjusting an unspecified number of combination.
In addition, to adjust the sagittal path angle of the jaw joint using a gothic arch tracer using a digitizer as a jaw position sensor, it is necessary to measure the inclination angle of the jaw joint plane or the distance between the jaws. It had the disadvantage of being complicated.
In addition, some measurement systems are omitted, and the adjustment system using statistically processed correlation values does not necessarily reflect gender differences or racial differences, and does not accurately reflect individual jaw motor functions. Did not.
[0003]
[Problems to be solved by the invention]
The present invention measures the horizontal jaw movement path and the relationship between the jaws necessary for setting the jaw position and adjusting the jaw joint and displaying them on a display, and acquiring the jaw joint based on electronic data. It is an object of the present invention to develop an adjustment system for a kou-eiki for the purpose of adjusting a kou-eiki by the check bite method.
[0004]
[Means for Solving the Problems]
In this system, one electronic camera and one measurement subject having three fixed points are installed on a gothic arch tracer and faced up and down. The first means is to develop a jaw relation sensor that inputs image data showing the jaw movement path and the relation between the upper and lower jaws to a personal computer. It is also used to measure the relationship between the jaws using the upper and lower jaw models, and the three-dimensional installation conditions of the intermaxillary relation sensor in the living body and the three-dimensional installation conditions on the upper and lower jaw models attached to the chin joint Thus, the second means is to provide three-dimensional compatibility between the relationship between the chin on the living body and the relationship between the chins on the mouthpiece indicated by the interchin relationship sensor. The third means is to obtain two-dimensional coordinate values of three measurement points in a sensor coordinate system of an electronic camera by image processing of a personal computer.
[0005]
Specifically, an electronic camera using a two-dimensional image sensor installed on a Gothic arch tracer bearing plate as a sensor, and a jaw relation sensor using an equilateral triangle drawn on a Gothic arch tracer drawing board as a measurement subject are used. It is attached to the upper and lower jaw of a patient via a bed, and detects three-dimensional displacement of the measurement subject with respect to the upper jaw due to horizontal jaw movement by image processing of image data input to a personal computer. It is recorded as a two-dimensional coordinate value in the sensor coordinate system.
[0006]
After performing the acquisition of Ko with reference to the display of the movement trajectory of the three vertices, the intermaxillary relation sensor was transferred to the upper and lower jaw model equipped with the Kouper under the same installation conditions as the measurement in the patient, The cheek bite indicated by the patient is operated by adjusting the keg light so that the two-dimensional coordinate values of the three vertices detected in real time on the kink device are equal to the respective values recorded at the tick byte position in the living body. The jaw relation of the upper and lower jaw models fitted with the Koupa is matched to the jaw relation at the position, and the path of the Koupo based on the check bite method is set.
The present invention is based on the above.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described based on examples with reference to the drawings.
a. In FIG. 1, a cordless CCD camera that transmits image data to a control circuit unit by wireless communication using microwaves using a battery as a power source is installed on a Gothic arch tracer bearing plate, and a measurement object is provided on the upper surface of the Gothic arch tracer drawing plate. FIG. 7 is a perspective view of a triangular relation sensor depicting a triangle, excluding a control circuit unit.
b. FIG. 2 is a plan view of the intermaxillary relation sensor excluding the control circuit unit.
c. FIG. 3 shows that the intermaxillary relation sensor is attached to the upper and lower jaw of a patient via the upper and lower jaw joints, and the control circuit unit is connected to a personal computer equipped with an image processing circuit, so that a measurement technique in a living body can be obtained. FIG. 1 is a schematic diagram illustrating a configuration of the present invention.
d. The image data of the electronic camera obtained by photographing the object to be measured is input to a personal computer, and the image processing circuit incorporated in the personal computer performs binarization processing and captures the coordinates of the change point, and the X coordinate of the captured coordinate values The two-dimensional coordinate values of three vertices of an equilateral triangle in the sensor coordinate system are detected by comparing the magnitude relation between the coordinates of the triangle and the Y coordinate.
e. The two-dimensional coordinate values of the three vertices in the detected sensor coordinate system are stored in an array memory for each frame as inter-chin relation data and recorded in a time series, and a triangle connecting the three vertices displayed after being converted to a display coordinate system is displayed. It is displayed on the display continuously as a real-time intermaxillary relation display. (FIG. 4)
f. The display position of each vertex of the triangle and the display position of each previous vertex are connected by a line segment, and this is repeated without erasing each time the frame is updated. Of the display on the display.
g. The above process is repeated for each frame until a stop command is issued, and the movement trajectory of the three vertices of the Gothic arch and the real-time inter-chin relation are displayed as triangles, so that the jaw position and the inter-chin relation on the jaw movement path are displayed. Display at the same time. (FIG. 5)
h. Physically record the intermaxillary relationship at the central position using the Ko-Kou acquisition material, and when the measurement in the patient is completed, relocate the intermaxillary relationship sensor to the Ko-up device and electronically record the central position. For the purpose, the measurement subject installed on the lower jaw side is photographed by an electronic camera installed on the upper jaw side, and is separately stored in a memory together with the jaw movement path as electronic inter-jaw relation data at the center position of the patient. (FIG. 6)
i. After the electronic recording of the central position, the screen was cleared to complete the measurement in the living body, and the upper and lower jaw joints were fixed while the inter-chin relation sensor was fixed in a three-dimensional positional relationship with the Gothic arch tracer and the ko material. Take it out of the mouth as a lump with the bed.
j. Fit the upper jaw collapsing side of the above lump to the upper jaw model attached to the face joint at the face bow, fit the lower jaw model separated from the jaw collapsing part to the lower jaw colleting side, close the jaw mixer, and measure Attach the lower jaw model at the center position.
k. After the attachment of the lower jaw model, the relationship between the jaws at the center position, which was separately recorded earlier, is displayed on the display.
l. Using an electronic camera, photograph the subject for measurement on the Kou Ja, and display the relationship between the jaws using the upper and lower jaw models as a triangle on the display in real time, matching the display position of the triangle indicating the relationship between the jaws recorded at the center position Make sure you do.
m. The material for collecting the ko-ko is removed, and the re-attachment of the ko-ko at the measured center position is completed. (FIG. 7)
n. The two-dimensional coordinate values in the sensor coordinate system of the three measurement points detected by the inter-chin relation sensor relocated on the kou-heigaku are converted to the display coordinate system, and the real-time jaws indicated by the upper and lower jaw models on the kou-heir As a relationship, a triangle is continuously displayed on the display, the operation of the system is confirmed, and the screen is once cleared.
o. The jaw movement path recorded in the living body is displayed to determine the check bite position, and the inter-chin relation data at the check bite position is displayed on the display. (FIG. 8)
p. On the same screen, the display of the triangle indicating the real-time inter-chin relation on the kou-ha is restarted. (FIG. 9)
q. On the screen showing the relationship between the jaws at the check bite position, the triangles, which are the real-time relationship between the jaws of the upper and lower jaw models linked to the movement of the jaw, are displayed in different colors, and on the same screen of the relationship between the two jaws. Adjust the operation of the joint so as to match the display position in, and set the path of the joint. (FIG. 10)
2. The system of claim 1, wherein the system is configured as described above.
As another embodiment, it is also possible to install a measurement subject on a Gothic arch tracer bearing plate and install an electronic camera on a Gothic arch tracer drawing plate to serve as a jaw relation sensor.
Furthermore, in the embodiment in which two electronic cameras are installed, three-dimensional measurement with three points and six degrees of freedom by the stereograph method is possible.
[0008]
【The invention's effect】
The effects of the present invention configured as described above will be described.
a. The position, area, shape, etc. of the equilateral triangle drawing pattern used as the measurement subject on the sensor surface via a fixed optical system are determined by the optical system of the single-focus electronic camera installed on the upper jaw and the lower jaw Since it uniquely corresponds to the direction, distance, and face-to-face posture of the measurement subject installed in the camera, even if it is a simplified relative measurement of the single-lens type, it is not possible to use it on a Kou-Pai. The two-dimensional coordinate values in the sensor coordinate system of the vertices are sufficient data to specify the relationship between the jaws three-dimensionally as they are, which require image processing by a personal computer, and that the sensor unit worn on the patient can be reduced in weight and size. Therefore, there is an advantage that it can be applied to edentulous patients.
b. At the start of the measurement, the camera section and the subject for measurement are vertically opposed at the upper and lower jaws near the center co-coupling, and the equilateral triangular pattern as the subject for measurement, with the base parallel to the left and right intermandibular head axis, By setting the diagonal vertex forward and the plane parallel to the ko mating plane, even if you perform lateral limit movement in horizontal mandibular movement using a Gothic arch tracer, the electronic camera sensor coordinate system The positional feature at which each vertex of the equilateral triangle forms an image does not change qualitatively. In this manner, the change point coordinates extracted by the binarization process of the image data are subjected to the maximum value or the minimum value in the X coordinate or the Y coordinate to determine the sensor coordinates of the three vertices of the equilateral triangle which is the measurement point. Two-dimensional coordinate values in the system can be detected.
Although it is possible to specify the relationship between the jaws on the Kou-Ju-Kan only by the position and form of the image on the sensor surface, a book that continuously records the two-dimensional coordinate values of the three vertices in the sensor coordinate system in time series. In the embodiment, after the measurement of the horizontal jaw movement path, this is reproduced and displayed, and since it is possible to determine the center position and determine the arbitrary jaw position as the check bite position, it is possible to obtain the co-joining and check bite measurement. In addition to the advantage of enabling a surgical procedure for performing a simultaneous operation, there is an advantage that a quantitative analysis of jaw movement can be performed.
c. Since the measuring sensor unit is small and lightweight and mounted on the Gothic arch tracer, it is easy to adapt to clinically most needed jawless patients.In addition, electronic Gothic arch drawing and electronic check bite Recording is performed simultaneously, which has the effect of reducing the time required for measurement.
d. On the display, the relationship between the jaws at the check bite position on the gothic arch is displayed as a triangle, and the adjustment mechanism of the semi-adjustable jaw joint is operated at the displayed position, and the real-time of the upper and lower jaw models on the jaw joint is displayed. Adjusting the display position of the triangle showing the relationship between the jaws is a visual adjustment of the semi-adjustable cooperator by the check bite method while navigating the position and direction on the display based on electronic data This has the effect of eliminating the need for a high level of skill required for adjusting the mixer.
e. By enlarging the image displayed on the display, it is possible to increase the adjustment accuracy of the kouho.
f. In an optical system using a wide-angle single focus lens with a large depth of field, it is possible to measure the opening and closing movement from the rest position of the lower jaw.
g. Since the sensor is cordless, the technique of measurement is simple and easy.
h. To draw a Gothic arch, draw a horizontal cross section of the three-dimensional jaw movement range as a diamond, and connect the apex which is the last point of the drawn diamond with the frontmost point which is one vertex of the diamond. Thereby, the functional forward direction in the living body can be defined and used for the analysis of the jaw function.
i. Since the relationship between the jaw position and the jaw on the jaw movement path can be displayed at the same time, it is convenient for observing the movement of the jaw including the left and right condyles and estimating the jaw function.
[0009]
[Brief description of the drawings]
FIG. 1 is a perspective view of a jaw relation sensor excluding a control circuit unit.
FIG. 2 is a plan view of an intermaxillary relation sensor.
FIG. 3 is a schematic diagram showing a measurement technique on a living body.
FIG. 4 is a display example of the relationship between the jaws at the start of the measurement. FIG. 5 is a display example of the relationship between the jaw movement and the jaw during the measurement. FIG. 8 is a schematic diagram showing a technique of measurement on the kou-hobe after the re-attachment of the kou-hobe. FIG. 8: Display example of intermaxillary relation data at the front check bite position. Example of display during operation of the lamp [Figure 10] Example of display at the end of operation of the timer in adjusting the front check bite [Explanation of reference numerals]
1. Gothic arch tracer bearing plate2. 2. Cordless CCD camera 4. Gothic arch tracer drawing board 4, measurement subject 5. Central bearing6. Lens hole 7. Upper jaw floor 8. 8. Upper jaw joint. Lower jaw floor 10. 10. Lower jaw joint. Cordless CCD camera control circuit section 12. Connection code 13. Personal computer 14. 14. Display between jaws Jaw movement path16. 17. Display of the relationship between the jaws by using the upper and lower models on the Kou-Ja. Kogumi

Claims (1)

An electronic camera connected to a personal computer is installed on a Gothic arch tracer bearing plate, a measurement subject having three measurement points is installed on a Gothic arch tracer drawing board, and the jaw relation of a personal computer-assisted coordinator adjustment system is installed. A sensor that adjusts the shape of a koube, which is used as a sensor.

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