JPH10314192A - Input system for supporting check bite measurement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily adjust an occlusion device in artificial tooth production by the support of a personal computer. SOLUTION: By additionally connecting an inclination angle measurement instrument whose sensor is a two-dimensional inclination angle sensor 1 installed in parallel to a lower jaw occlusion plane through an A/D converter and an interface to the personal computer of a gothic arch plotting system using a digitizer as an input device, ectronic signals from the digitizer and the inclination angle measurement device are fetched to the personal computer and the arrow-like inclination angle and side part inclination angle of a horizontal lower jaw position and the lower jaw occlusion plane in a set occlusion high diameter are simultaneously measured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes the Kristen phenomenon which is performed in the production of dental prostheses by using a gothic arch tracer using a digitizer as an input device or another electronic Gothic arch tracer together with an inclination measuring device. The check bite measurement by obtaining the checked cheek bit core was changed to a method of electronically measuring the two-dimensional coordinates of the mandibular position and the occlusal plane inclination angle using a personal computer, and it became possible to adjust the path of the articulator with computer assistance The present invention relates to a check byte measurement support input system for performing

[0002]

2. Description of the Related Art Conventionally, it has been most excellent to perform artificial tooth arrangement and automatic grinding of artificial teeth while reproducing a mandibular movement path of a patient on an articulator adjusted based on a patient's tract measurement. The articulator adjustment method by the check bite method for semi-adjustable articulators was considered to be one of the most common articulator adjustment methods for denture manufacture. However, the conventional method of adjusting an articulator by the check bite method is to obtain a check bite core in a patient's mouth using a check bite material, and to interpose this between the upper and lower jaw models attached to the articulator, A delicate operation to adjust the upper and lower jaw model and the check bite core to each other while adjusting the adjustment mechanism was required, and the adjustment limit capability of the semi-adjustable articulator, the shape stability of the check bite material,
Due to complex errors in the measurement operation, adjustment operation, etc., it was difficult to make a clear and reproducible measurement, and high-precision measurement and articulator adjustment were limited to only a few people familiar with articulator operation. Under such circumstances, a gothic arch tracer using a digitizer as an input device for measuring the horizontal jaw position and obtaining occlusal development was developed, and the horizontal position of the lower jaw at the set occlusal height was measured. Although input to a personal computer became possible, it was a two-dimensional measuring device having one point and two degrees of freedom, and could not obtain check byte data indicating the three-dimensional relationship of the jaw positions by itself. on the other hand,
Measuring the sagittal inclination and lateral inclination of the mandibular occlusal plane at a known horizontal mandibular position at the set occlusal height will measure the three-dimensional positional relationship to the maxilla of the mandible, and use this as an articulator. If reproduced above, it would be possible to adjust the path of the articulator as an electronic check bite record.
Until now, however, an electronic signal directly indicating the respective sagittal and lateral inclinations of the mandibular occlusal plane, which, when used in conjunction with an electronic Gothic arch tracer, allows the articulator to adjust its tract. There was no system for inputting the information to a personal computer.

[0003]

SUMMARY OF THE INVENTION The present invention relates to a method for measuring a check bite, which is often time-consuming and painful to a patient, and for adjusting an articulator thereof to input a horizontal jaw position to a personal computer. The Gothic arch tracer used for occlusal acquisition as a device is positioned as an essential component of the check bite measurement system that can obtain three-dimensional information of the mandibular position. According to the present invention, the sagittal inclination and side of the mandibular occlusal plane By adding an electronic signal directly indicating the angle of each tilt angle to the personal computer of the Gothic arch drawing system, the clinical application range including the check bite measurement of the Gothic arch tracer is expanded, and the denture manufacturing It is an object of the present invention to facilitate articulator adjustment in the above.

[0004]

[Means for Solving the Problems] Japanese Patent Publication No. Hei 7-112476
A two-dimensional tilt angle sensor installed parallel to the mandibular occlusal plane via an A / D converter and an interface on a personal computer of a Gothic arch drawing system using a digitizer disclosed in Japanese Patent Publication No. By additionally connecting the inclination measuring device,
The electronic signals from the digitizer and the tilt angle measuring device are taken into a personal computer, and the horizontal mandibular position at the set occlusal height, the sagittal tilt angle of the mandibular occlusal plane, and the lateral tilt angle are simultaneously measured. After recording the data, the measurement system is relocated and operated on the upper and lower jaw models attached to the articulator, and the articulator adjustment mechanism is operated to approximate the values indicated by the system on the articulator to the recorded measurement values The method is to set an electronic check bite measurement method using a Gothic arch tracer, which is to adjust the path of the articulator.

[0005]

[Effects] There are various types of articulators and adjustment methods using them in the adjustment of the side or tract using a semi-adjustable articulator.
There is no mechanism for adjusting the working side or the path, and the adjustment of the equilibrium side or the path is performed while the center of the horizontal rotation of the lower jaw is approximately fixed. In such an articulator adjustment method, the occlusal height is defined while the digitizer position specifying device incorporated in the present system is in contact with the digitizer sensor surface, and the two-dimensional side check tool indicated by the Gothic arch tracer is used. To approximate the target position on the upper and lower jaw model attached to the articulator, the horizontal position of the lower jaw including the horizontal rotation of the lower jaw occlusal plane after fixing the approximate center of rotation and defining the occlusal height This means that three-dimensional coordinates of one point on the mandibular occlusal plane are defined, and the horizontal rotation of the mandibular occlusal plane about the vertical axis direction orthogonal to the occlusal plane is approximated. Furthermore, in such a horizontal positional relationship of the occlusal plane, the lower jaw occlusal plane centered on the X-axis direction (left-right side direction) and the Y-axis direction (sagittal direction) orthogonal to the Z-axis direction (vertical axis direction). Approximately reproducing the sagittal inclination angle and the lateral inclination angle while operating the measurement system according to the present invention is performed by using the coordinate values of the mandibular position at one point and three degrees of freedom and the rotation of three axes orthogonal to the point. The angle is equivalent to approximately reproducing a three-dimensional position of the mandibular occlusal plane with respect to the upper jaw with one point and six degrees of freedom. On the other hand, the adjustment of the anterior check bite is the adjustment of the movement path of the head when both sides or the head are simultaneously anteriorly moving at the same time, setting both sides of the articulator or the head taxiway to the front, input by the Gothic arch tracer By keeping the horizontal position of the lower jaw at the position of the front check bite and approximating the sagittal inclination angle of the lower jaw occlusal plane, the three-dimensional position of the lower jaw occlusal plane with respect to the upper jaw can be approximately set. In this system, based on such an operation method and the adjustment theory using a semi-adjustable articulator, the upper and lower jaws are leveled using the digitizer of the measurement system transferred onto the upper and lower jaw model attached to the articulator. Reproduction of the positional relationship and reproduction of the inclination angle of the mandibular occlusal plane at that position using the inclination angle measuring device is used as an articulator or a means of road adjustment. This is because the Gothic arch drawing is performed with the occlusal height constant, that is, by measuring the value of the vertical element at the position indicated by the position specifying device by the height of the position specifying device, It is a measurement method that is equivalent to one-point three-degree-of-freedom measurement while using the two-dimensional measurement of the lower jaw position. In addition, in adjusting the articulator of the side check bite, the working side or the vicinity of the head is set as the horizontal rotation center of the lower jaw Approximately fixed, so that the horizontal rotation of the mandibular occlusal plane, that is, the rotation of the mandibular occlusal plane about an axis perpendicular to the occlusal plane, is approximately reproduced on the articulator by matching the horizontal position of the mandible It is possible to assume that both the left and right or the head are moving forward in the articulator adjustment of the anterior check bite, and to approximate the inclination angle of the occlusal plane to this The three-dimensional positional relationship is approximated by the three-dimensional coordinate value of one point belonging to the occlusal plane and the rotation angle about the three orthogonal axes, and the three-dimensional positional relationship by one point and six degrees of freedom measurement of the occlusal plane. This is based on grounds that are equivalent to approximation.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION

a. A tilt angle measuring device using a capacitance type X-Y two-axis output tilt angle sensor as a sensor is defined as a tilt angle measuring device for a mandibular occlusal plane. b. Attach a tilt angle sensor connecting arm consisting of a connecting part, a horizontal rotation joint, an arm, a ball joint, and a fork to a slot installed on the digitizer plate on a digitizer plate on which a resistive film type sensor of a resistive film type digitizer is installed. I do. c. The capacitance type XY two-axis output tilt angle sensor is mounted on the fork of the tilt angle sensor connecting arm. d. The tilt angle sensor and the resistive sensor are connected to the tilt angle measuring device and digitizer via the respective cords and connectors. e. The tilt angle measuring device of this system is connected to a personal computer of a Gothic arch drawing system using a digitizer as an input device via an A / D converter and an interface. The input system for check byte measurement support according to claim 1, wherein the input system is configured as described above. The specific mode of use of the invention according to claim 1 is shown below. a. A temporary occlusion is obtained, and the upper and lower jaw models are attached to the articulator using a face bow at a temporary center position. b. Install the articulator so that the Campel plane on the articulator is horizontal. c. The mandibular occlusal plane is set on the occlusal floor occlusion ridge on the mandibular model so as to be parallel to the articulator camper plane, and the digitizer plate is fixed to match the mandibular occlusal plane. d. The resistive sensor of the Gothic arch drawing system using a personal computer and a resistive digitizer is installed on the upper surface of the digitizer plate fixed to the occlusal ridge on the mandibular occlusal floor. e. Positioning device installed on Gothic arch tracer position specifying device plate on maxillary occlusal floor. f Measure the center of the patient using the Gothic arch delineation system and remount the lower jaw model at the measured center. g. Confirm that the Campel plane on the articulator is horizontal, correct the re-mounted digitizer plate so that it is parallel to the Campel plane on the articulator, and connect the tilt sensor connection arm to the digitizer plate. h. Align the Y axis of the tilt angle sensor with the sagittal direction,
With the axis parallel to the head-to-head axis, the tilt angle sensor fixed in the frame so that the XY plane is horizontal to the Campel plane is attached to the fork of the tilt angle sensor connection arm,
Connect the digitizer plate and the tilt angle sensor. i. Connect the resistive sensor to the digitizer body,
Connect the tilt angle sensor to the tilt angle measuring device. j. A personal computer of a Gothic arch drawing system connected to a digitizer is equipped with an inclination angle measuring device
Connect via D converter, interface. k. The upper and lower jaw occlusal floors equipped with the sensor part of this system including the Gothic arch drawing system are installed in the patient's mouth, and the signal of each sensor is sent to the personal computer of the Gothic arch drawing system via a digitizer and tilt angle measuring device. Output and measure. l. After the measurement, the upper and lower jaw occlusal floor mounted on the patient is removed and the inclination angle sensor is removed, and the upper and lower jaw models mounted on the articulator are transferred. m. In the actual measurement, the lower jaw moves, whereas in the articulator, the upper jaw moves.Therefore, in the mandibular movement simulation or articulator adjustment on the articulator, the inclination angle sensor used for patient measurement is used for the articulator. Transfer to the upper jaw frame parallel to the Campel plane, with the X axis parallel to the condylator opening / closing axis (or head-to-head axis) and the Y axis aligned with the sagittal plane direction. As described above, the articulator having the inclination sensor installed on the upper jaw frame is installed so that the Campel plane is horizontal to the ground surface. (The Gothic arch tracer used for patient measurements is on the lower jaw model with the lower jaw occlusal floor). n. The output signal from the tilt angle measurement device installed on the articulator upper jaw frame is reversed in the direction of the measurement method when installed on the patient's lower jaw.
The absolute value of the inclination angle with respect to the axis is not changed, and a value obtained by reversing +-is displayed on the display as a lower occlusal plane inclination angle (sagittal inclination angle, lateral inclination angle) on the articulator. o. On the display, the measured lower jaw position of the Gothic arch and the upper and lower jaw models attached to the articulator are displayed by the Gothic arch drawing software, and the lower jaw position to the actually measured side check bite position (Occlusal upper jaw model) ) Is induced and retained. p. After holding the horizontal position of the upper jaw model (the lower jaw position of the patient) at the lateral check bite position, adjust the equilibrium side articulator or tract adjustment mechanism to determine the inclination of the lower jaw occlusal plane on the articulator to the check bite position. Approximate the value of the lower jaw occlusal plane inclination angle measured in. (In actual operation, the maxillary occlusal plane on the articulator is tilted.) Q. In the adjustment of the anterior check bite, the gothic arch tracer defines the mandibular position on the articulator and approximates the sagittal angle at that position. The path of the articulator is adjusted with the aid of the computer as described above. As another embodiment, a Gothic arch drawing and checking can be performed by using a set of digitizers using an electromagnetic induction type digitizer and a corresponding electronic pen pressure pen as a position specifying device in combination with a Gothic arch tracer using a lower jaw position input device. It can be a complex system for measuring bite pressure and occlusal pressure through the floor.

[0007]

According to the present invention, an azimuth measuring device is additionally installed on the digitizer plate and the horizontal rotation of the occlusal plane is actually measured, so that it can be developed as an input device for performing three-dimensional measurement of the jaw position. In the measurement using the present invention, it is necessary to use a head fixing device used for taking a head X-ray standard photograph, or to prevent the head from shaking using an abutment of a dental unit, By mounting the tilt angle sensor on the head of the measurement subject and additionally measuring the tilt of the head, it is possible to calculate a correction value that cancels the tilt of the head due to body movement. Furthermore, by installing an azimuth angle measurement sensor on the head and the digitizer plate, it becomes possible to develop the input system for true three-dimensional measurement of the jaw position. In the present invention, the measurement sensor attached to the patient is transferred to the upper and lower models on the articulator, and the positional relationship of the upper and lower jaw models on the articulator is shown by images and numerical values on the display, and this is recorded image on the patient. The method of adjusting the articulator is to approximate the measured value to the measured value, so that the objectivity of the articulator adjustment can be enhanced. It is possible on software to develop a visual system in which the jaw position is three-dimensionally graphically displayed from the input data and the articulator is adjusted while viewing the image on the display. There is no need to acquire a check byte measurement core. Storage of records, printing, transfer, processing of inspection information, etc. are easy. Based on the mechanical data of various articulators and the measured values of the patient, the movement of the articulator due to jaw movement was simulated, and the optimal adjustment value in each articulator adjustment mechanism was calculated. Target adjustment is possible. Since the measurement of the jaw position and the adjustment of the articulator are facilitated, the production of a denture in harmony with the jaw movement function of the living body is facilitated, and a denture with good maintenance stability and easy to bite can be provided. The clinical scope of electronic Gothic arch tracers can be extended.

[0008]

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which the sensor unit of the present invention is connected to a sensor unit of a Gothic arch tracer using a resistive digitizer as an input device. FIG. 2 is a schematic diagram for explaining a use state when the measurement system sensor unit configured as described above is mounted on a patient and actual measurement is performed. FIG. 3 is an explanatory schematic diagram showing the positional relationship between the oral cavity of the patient, the articulator, and the sensor unit excluding each control circuit unit when the articulator is adjusted by the measurement system.

[Explanation of symbols]

 1. 1. Capacitive X-Y biaxial output tilt angle sensor 2. Digitizer resistive film type sensor Digitizer plate 4. Connecting part 5. Horizontal rotating joint 6. Arm 7. Ball joint 8. Fork 9. Slot 10. 10. Tilt angle sensor code Inclination angle sensor connector 12. 12. Digitizer resistive film sensor code 13. Digitizer resistive sensor connector Mandibular bite floor 15. Lower jaw bite 16. Maxillary bite floor 17. Maxillary bite 18. Position designation device board 19. Position specifying device 20. Articulator maxillary frame

Claims (1)

[Claims] A tilt angle measuring device using a two-dimensional tilt angle sensor as a sensor for measuring the sagittal tilt angle and the lateral tilt angle of the mandibular occlusal plane by the Christensen phenomenon as an input device to a personal computer. An input system for check byte measurement support.