Digital jaw position analyzer

Abstract

The utility model discloses a digital jaw position analyzer, which comprises a face arch assembly, a suborbital point assembly, a condylar axis assembly, a tracing assembly and a mandibular movement assembly, can be used as a conventional face arch, and can also be used for tracing a condylar axis and tracing a mandibular movement track to directly obtain space coordinates of each key point; the condylar axis coordinates are obtained into the same coordinate system of the face arch, so that digital jaw position analysis is achieved, jaw position analysis can be completed more quickly without a complex mandibular motion tracing instrument, and the method is used for checking whether the jaw position of an orthodontic patient is abnormal or not, preventing the possible temporomandibular joint problem and assisting an orthodontic doctor in better scheme design. And the correction result is more stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of jaw position analysis in dentistry, in particular to a digital jaw position analysis instrument. BACKGROUND

[0002] Jaw position analysis usually needs to use a facebow to obtain the relationship between the condyle and the upper dental model (the process of transferring the spatial position relationship of the condyle and the upper dental model to the jaw frame using the facebow, which is referred to as facebow transfer), the facebow has two earballs inserted into the external auditory canal of the patient, and another nose support is fixed on the nasal bridge, which uses three points to stabilize the entire facebow and prevent it from shaking. However, when occluding, the condyle moves backward and hits the front wall of the external auditory canal, causing the earballs placed in the external auditory canal to shake, resulting in the entire facebow to shake. Therefore, it is not possible to obtain the true condylar axis position while obtaining the spatial relationship between the condyle and the upper dental model. That is, the condylar axis position obtained by the mandibular movement tracing instrument is separate from the upper dental model position obtained by the facebow, and cannot be completed on the same instrument.

[0003] Since the condyle is inside the skull, the spatial position relationship cannot be directly obtained, so the conventional method is to replace the condyle with the earballs of the facebow, but this causes errors. Therefore, there is a special mandibular movement tracing instrument that places a small plate in the anterior region of the tragus, and after fixing the articulator to the lower dental arch, the horizontal bar connected to the articulator and the pointer together trace the movement trajectory of the condyle on the small plate, and the center point of the condylar axis can be traced. Since the distance between the external auditory canal and the condyle is very close, only 5-10 mm, there is currently no device that can combine the two. Therefore, an instrument that can be used as a conventional facebow and can also trace the condylar axis is needed to facilitate clinical operation.

[0004] CN 117898825 discloses a method for solving the condylar rotation axis based on the mandibular movement trajectory, but this method requires taking a full skull CT and segmenting the mandible, then registering the segmented mandibular teeth with the scanned dental model, which is time-consuming and laborious. At the same time, the accuracy of the segmented mandibular model from the CT image is low, and there is a large error in the registration with the scanned dental model. CN 113040952 and US2017037110W disclose a virtual model of joint movement obtained by intraoral scanning, which calculates the condylar axis by scanning different occlusion positions. However, this method requires intraoral scanning of several or even dozens of occlusion positions, as one intraoral scan takes 3-5 minutes, it is difficult for patients to persist in doing so many occlusion actions. The calculated condylar axis also has a large error and is not the true condylar axis position. This will delay the doctor's clinical time and the patient's experience is also poor.

[0005] Clinically, facebow transfer for patients typically takes only 5-10 minutes, while fixing the plaster model to the jaw frame can take more than an hour, making it difficult for clinicians to perform jaw position analysis. Therefore, an instrument is needed that can simultaneously perform mandibular motion recording, condylar axis recording, and facebow transfer, directly obtaining condylar axis coordinates, infraorbital point coordinates, and condylar width values, enabling faster jaw position analysis. Summary of the Invention

[0006] The advantages of this invention are that it can be used as a conventional facebow, as well as to record the condylar axis and mandibular movement trajectory. It can directly obtain the spatial coordinates of each key point and integrate the condylar axis coordinates into the same coordinate system of the facebow for digital jaw position analysis. It eliminates the need for a complex mandibular motion recorder, allowing for faster jaw position analysis. It integrates multiple functions, eliminating the need for doctors to purchase two sets of devices. It accurately analyzes the mandibular position, saves costs, and greatly simplifies clinical work. It is used to check whether the mandibular position of orthodontic patients is abnormal.

[0007] To achieve the above objectives, the present invention provides a digital jaw position analyzer, comprising:

[0008] Face bow assembly for face bow installation and width adjustment;

[0009] Infraorbital point component, used to measure the spatial coordinates of the infraorbital point;

[0010] Condylar axis assembly, used to measure the spatial coordinates of the condylar axis;

[0011] A recording component for condylar axis recording and condylar motion recording;

[0012] The mandibular motion component provides power for mandibular opening and closing during condylar axis mapping and condylar motion mapping.

[0013] In one embodiment, the face bow assembly includes: a fixed body, a left horizontal bar, a right horizontal bar, a bow section, a universal joint fixing hole, an ear ball, a condylar axis pointer, and a nose bridge section. The left and right horizontal bars are located on the left and right sides of the fixed body, are parallel to each other, and have length adjustment components. The two ends of the left and right bow sections are connected to the ear ball and the left and right horizontal bars, respectively. The nose bridge section is located at the upper end of the fixed body, and the distance between the center points of the two ear balls corresponds to the value indicated on the condylar width scale.

[0014] Furthermore, the length adjustment component has scale values ​​that correspond to the extension and retraction lengths of the left and right horizontal bars. Shortening the length of the left and right horizontal bars of the face bow makes it easier for children to use, or it can be fixed without adjustment, which is the standard face bow.

[0015] Furthermore, the ear bulb adjustment screw on the ear bulb is used to adjust the depth of the ear bulb entering the external auditory canal. When the adjustment screw is fully tightened, the distance between the center points of the two ear bulbs is consistent with the condyle width scale value of the fixed body.

[0016] Further, the nose pad part comprises a nose pad, a nose pad sliding rod, a vertical sliding block, a horizontal adjusting screw, a horizontal sliding block, a U-shaped slot and a vertical adjusting screw, the sliding directions of the vertical sliding block, the horizontal sliding block and the nose pad sliding rod of the nose pad part are perpendicular to each other.

[0017] In an embodiment, the suborbicular point assembly comprises a suborbicular point pointer and a pointer sliding block, the pointer sliding block is embedded into the U-shaped hole of the suborbicular point pointer, the suborbicular point pointer and the pointer sliding block are matched to realize the front-back and lateral sliding directions perpendicular to each other.

[0018] Further, the vertex of the suborbicular point pointer in the suborbicular point assembly and the plane formed by the two side earlobe center points are parallel to the plane formed by the left and right horizontal rods.

[0019] In an embodiment, the condylar axis assembly comprises a condylar axis pointer, a condylar axis sliding rod and a condylar axis sliding block, the condylar axis sliding rod slides in the front-back direction, the condylar axis sliding block slides in the vertical direction, and the condylar axis pointer slides in the left-right direction in the condylar axis sliding rod.

[0020] In an embodiment, the tracing assembly comprises a tracing board, a tracing sliding block, a dial and a scale paper, the horizontal board of the T-shaped tracing board has a U-shaped groove matched with the convex groove of the tracing sliding block, and the tracing board slides in the front-back and left-right directions.

[0021] In an embodiment, the mandibular movement assembly comprises a tracing pen, a tracing pen adjusting block, a silica gel gasket, an elastic band, a movement rod, a movement rod adjusting seat and a joint, and the tail of the tracing pen has a groove.

[0022] Further, the movement directions of the facebow assembly, the suborbicular point assembly, the condylar axis assembly, the tracing assembly and the mandibular movement assembly, and the components on the five assemblies, are parallel or perpendicular to the long axis of the left and right horizontal rods.

[0023] In an embodiment, the digital jaw position analyzer has four use methods as follows:

[0024] The first use method: the facebow assembly and the suborbicular point assembly are matched to be used as a conventional facebow.

[0025] The second use method: the surface point of the condylar axis in the pretragal area is manually marked, the condylar axis pointer is moved to the point, the scale value of the point can be directly read, and the jaw position analysis can be directly performed after the value is input into the software.

[0026] The third use method: the position of the condylar axis on the tracing board is traced by the mandibular movement assembly, the data of the point on the dial of the tracing board is read, and the spatial position relationship between the condylar axis and the upper dental model can be obtained by inputting the data into the software, or the scale value can be read by moving the condylar axis pointer.

[0027] The fourth use method is that the movement of the condyle is recorded through the mandibular movement assembly, the condyle movement curve is drawn, the scale value of the curve is read, and the digitized condyle movement curve can be obtained by inputting the software.

[0028] The application discloses a digital jaw position analyzer, which comprises a facebow assembly, a subnasale assembly, a condylar axis assembly, a recording assembly and a mandibular movement assembly. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 It is a schematic view of a digital jaw position analyzer;

[0031] Figure 2 It is a schematic view of a facebow assembly of a digital jaw position analyzer;

[0032] Figure 3 It is a partial schematic view of a digital jaw position analyzer;

[0033] Figure 4 It is a schematic view of a subnasale assembly of a digital jaw position analyzer;

[0034] Figure 5 It is a schematic view of a condylar axis assembly of a digital jaw position analyzer;

[0035] Figure 6 It is a schematic view of a recording assembly of a digital jaw position analyzer;

[0036] Figure 7 It is a schematic view of another installation mode of a condylar axis assembly of a digital jaw position analyzer;

[0037] Figure 8 It is a schematic view of a mandibular movement assembly of a digital jaw position analyzer;

[0038] Figure 9 It is a partial schematic view of a mandibular movement assembly of a digital jaw position analyzer;

[0039] Figure 10 Fig. 1 is a schematic view of a digital jaw analysis of a digital jaw analysis instrument;

[0040] Fig. 1 is a schematic view of a digital jaw analysis of a digital jaw analysis instrument; Fig. 2 is a schematic view of a facebow assembly; Fig. 3 is a schematic view of a condylar axis assembly; Fig. 4 is a schematic view of a tracing assembly; Fig. 5 is a schematic view of a mandibular movement assembly; Fig. 6 is a schematic view of a nasal rest assembly; 1 - facebow assembly, 101 - fixed body, 102 - left horizontal bar, 103 - right horizontal bar, 104 - universal joint fixing hole, 105 - condyle width scale, 106 - length adjustment assembly, 107 - bow, 108 - knob adjustment screw, 109 - knob, 600 - nasal rest, 2 - infraorbital point assembly, 201 - infraorbital point pointer, 202 - U-shaped hole, 203 - pointer slider, 204 - pointer slider convex slot, 3 - condylar axis assembly, 301 - condylar axis pointer, 302 - condylar axis sliding bar, 303 - condylar axis slider, 4 - tracing assembly, 401 - tracing plate, 402 - vertical plate, 403 - horizontal plate, 404 - tracing slider, 405 - scale disc, 406 - scale paper, 407 - head back strap mounting hole, 408 - head top strap mounting hole, 5 - mandibular movement assembly, 501 - movement bar, 502 - movement bar adjustment seat, 503 - articulator, 504 - silica gel pad, 505 - rubber band, 506 - tracing pen, 507 - tracing pen concave slot, 508 - tracing pen adjustment block, 509 - universal joint, 510 - tracing pen adjustment screw, 601 - nasal rest, 602 - nasal rest sliding bar, 603 - vertical slider, 604 - horizontal adjustment screw, 605 - horizontal slider, 606 - U-shaped slot, 607 - vertical adjustment screw DETAILED DESCRIPTION

[0041] The embodiments of the present application are described below in detail with reference to the accompanying drawings. The embodiments described below are examples for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative work fall within the scope of the present application.

[0042] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the present application.

[0043] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an indicated number of technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly and specifically limited.

[0044] As shown in Figure 1 A digital jaw position analyzer, comprising: a facebow assembly 1, a suborbicular point assembly 2, a condyle axis assembly 3, a tracing assembly 4 and a mandibular movement assembly 5, the facebow assembly is the main body of the digital jaw position analyzer, connected with the suborbicular point assembly, the condyle axis assembly, the tracing assembly and the mandibular movement assembly, the right side is connected with the suborbicular point assembly, the tracing assembly is located at the rear side of the suborbicular point assembly, the condyle axis assembly is located at the right side of the tracing assembly, and the mandibular movement assembly is located at the lower end of the facebow assembly.

[0045] As shown in Figure 2 The facebow assembly comprises: a fixed body 101, left and right horizontal rods 102 and 103, a universal joint fixing hole 104, an arch 107, ear balls 109, a condyle axis pointer 301 and a nose pad 600, the left and right horizontal rods are located on the left and right sides of the fixed body, are parallel to each other and have length adjustment assemblies 106, the arches at the two ends of the left and right sides are connected with the ear balls and the left and right horizontal rods respectively, the nose pad is located at the upper end of the fixed body, and the distance between the center points of the bilateral ear balls corresponds to the value indicated on the condyle width scale 105.

[0046] As shown in Figure 3 The nose pad 600 comprises: a nose pad 601, a nose pad sliding rod 602, a vertical sliding block 603, a horizontal adjustment screw 604, a horizontal sliding block 605, a U-shaped groove 606 and a vertical adjustment screw 607, the nose pad is a detachable component and works in cooperation with the facebow assembly, and the sliding directions of the vertical sliding block, the horizontal sliding block and the nose pad sliding rod of the nose pad are perpendicular to each other.

[0047] Further, the length adjustment assembly can also be fixed and not adjusted, that is, a conventional facebow, which can shorten the length of the left and right horizontal rods of the facebow through the length adjustment assembly, so as to facilitate children to use the facebow.

[0048] As shown in Figure 1 The ear ball adjustment screw 108 on the ear ball can adjust the depth of the ear ball into the external auditory canal, when the adjustment screw is completely locked, the distance between the center points of the bilateral ear balls is consistent with the condyle width scale value of the fixed body, and when the adjustment screw is adjusted in the reverse direction, the ear ball can be separated from the external auditory canal, preventing the impact of the ear ball during condyle axis tracing, so as to avoid the deviation of the condyle axis tracing.

[0049] As shown in Figure 4As shown, the infraorbital point assembly includes: infraorbital point pointer 201 and pointer slider 203, pointer slider convex slot 204 head embedded in the U-shaped hole 202 of the pointer along the U-shaped gap sliding, the infraorbital point pointer and the pointer slider cooperate to realize the front and back, lateral sliding perpendicular to each other, such sliding ensures that the scale value of the infraorbital point can be accurately read at any time, and the software is convenient for inputting analysis and calculation.

[0050] For example, the vertex of the infraorbital point pointer on the infraorbital point assembly and the plane composed of the three points of the center points of the two earballs form a plane parallel to the plane composed of the left and right horizontal rods, and the two planes are parallel to each other, ensuring that the movement on the mechanical structure can be converted into a numerical value, and the scale value can be read and input into the software.

[0051] Further, the vertex of the infraorbital point pointer on the infraorbital point assembly and the plane composed of the three points of the center points of the two earballs can also be parallel to the plane composed of the left and right horizontal rods. The advantage of parallel is that it is convenient for calculation. If it is not parallel, the parameters read need to be input into the matching software for calculation after space coordinate conversion, increasing the complexity.

[0052] As shown, Figure 5 The condyle shaft assembly includes: condyle shaft pointer 301, condyle shaft sliding rod 302 and condyle shaft sliding block 303, the condyle shaft sliding rod slides along the front and back, the condyle shaft sliding block slides along the vertical direction, and the condyle shaft pointer slides left and right in the condyle shaft sliding rod, ensuring that the movement on the mechanical structure can be converted into a numerical value, and the scale value can be read and input into the software. The condyle shaft pointer, the condyle shaft sliding rod and the condyle shaft sliding block all have scale values.

[0053] As shown, Figure 10 The scale values indicated by the condyle shaft pointer, the condyle shaft sliding rod and the condyle shaft sliding block are the space coordinates of the condyle surface points. The left condyle surface point a and the right condyle surface point b are connected by ab, and the intersection A of the straight line ab and the sagittal plane passing through the left earball center point c is the left condyle center point. The intersection B of the straight line ab and the sagittal plane passing through the right earball center point d is the right condyle center point.

[0054] As shown, Figure 6 The tracing assembly includes: T-shaped tracing plate 401, tracing slider 404, scale disc 405, scale paper 406 and strap mounting hole, the strap mounting hole includes head rear strap mounting hole 407 and head top strap mounting hole 408, which is used to fix the digital jaw position analyzer and the tightness of the patient's head. The T-shaped tracing plate has vertical plate 402 and horizontal plate 403. The horizontal plate of the T-shaped tracing plate has a U-shaped groove matched with the convex slot of the tracing slider. The tracing plate slides in the front and back and left and right directions. When the left and right tracing plates slide inward, they can clamp the head to provide stability for the analyzer.

[0055] As shown, Figure 7As shown, a new digital jaw position analyzer, the condylar axis pointer 301 and condylar axis slide rod 302 in the original condylar axis assembly are installed in the tracing slider 404. Unlike the original movement, the condylar axis pointer can move in the direction parallel or perpendicular to the long axis of the left and right horizontal rods.

[0056] As shown in Figure 8 and Figure 9 The mandibular movement assembly includes: movement rod 501, movement rod adjusting seat 502, articulator 503, silicone gasket 504, rubber band 505, tracing pen 506 and tracing pen adjusting block 508. The jaw occlusion mandibular movement assembly is driven by the mandibular movement assembly, and the tail of the tracing pen has a groove 507. The tracing pen adjusting screw 510 is installed on the tracing slider, which can control the tightness of the tracing pen, and cooperate with the mandibular movement assembly to record.

[0057] Further, a new digital jaw position analyzer, the moving direction of the moving part is in the direction parallel or perpendicular to the long axis of the left and right horizontal rods.

[0058] Exemplary, the steps of the conventional use of a digital jaw position analyzer:

[0059] Step 1: Adjust the left 102 and right 103 horizontal rods, put the ear ball into the external auditory canal, adjust the ear ball adjusting screw 108 on the ear ball, so that the ear ball can fit the external auditory canal, fix the nose holder 601, adjust the horizontal adjusting screw 604 and the vertical fixing screw 607 and lock them;

[0060] Step 2: Move the vertical plate 402 to make it fit the temple and tighten it. Put the strap through the back of the head 407 and the top of the head strap mounting hole 408, and tighten the strap to prevent the face bow assembly 1 from moving;

[0061] Step 3: Adjust the infraorbital point pointer 201 so that its head is aligned with the infraorbital point.

[0062] Step 4: Back off the ear ball adjusting screw so that the ear ball 109 is withdrawn by 2-10 mm, so that the condyle movement will not collide with the ear ball. Install the mandibular movement assembly 5, perform condylar axis tracing and condylar movement curve tracing, and read the condylar axis point scale value.

[0063] Step 5: Remove the mandibular movement assembly, tighten the ear ball adjusting screw, place the silicone impression material on the articulator 503, fix the articulator on the maxillary teeth, and install and fix the universal joint 509.

[0064] Step 6: After the silicone impression material is cured, loosen the left and right horizontal rod fixing screws of the face bow assembly, remove the articulator and universal joint, and remove the face bow assembly.

[0065] Step 7: After scanning the interocclusal and facebow, the spatial relationship between the maxillary teeth and the ear ball is obtained, the suborbicular point scale value and the condylar axis point scale value are input into the software, and the jaw position analysis is completed.

[0066] Exemplarily, another use step of the digital jaw position analyzer:

[0067] Step 1: Register the mandibular teeth model with the interocclusal of the mandibular movement assembly, and do not install the facebow assembly;

[0068] Step 2: Paste a piece of white paper on the anterior region of the tragus of the head, and after condylar axis tracing, the white paper has a condylar axis surface point;

[0069] Step 3: Do not install the vertical plate, use the condylar axis pointer to point to the just traced condylar axis surface point, and read the condylar axis point scale value;

[0070] Step 4: Input the condylar axis point scale value into the software for digital analysis.

[0071] The digital jaw position analyzer comprises a facebow assembly, a suborbicular point assembly, a condylar axis assembly, a tracing assembly and a mandibular movement assembly. It can be used as a conventional facebow, and can also trace the condylar axis and the mandibular movement trajectory to directly obtain the spatial coordinates of each key point, obtain the condylar axis coordinates in the same coordinate system of the facebow, and input the above scale value into the software to realize digital analysis. The digital jaw position analyzer does not need a complex mandibular movement tracer, can more quickly complete jaw position analysis, is multifunctional, and doctors do not need to purchase two sets of devices. The digital jaw position analyzer can accurately analyze the mandibular position, check whether the mandibular position of an orthodontic patient is abnormal, find patients with more serious mandibular position abnormalities, assist orthodontic doctors in better scheme design, prevent possible temporomandibular joint problems, make the correction result more stable, save costs, and greatly simplify clinical work.

[0072] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0073] Furthermore, it should be understood that although the specification is described in terms of embodiments, not every embodiment includes only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A digital jaw analyzer, comprising: The application relates to a face-bow assembly, an infraorbital point assembly, a condylar axis assembly, a tracing assembly and a mandibular movement assembly. The face-bow assembly comprises a fixed body, left and right horizontal rods, a universal joint fixing hole, an arch, ear balls, a condylar axis pointer and a nose support part, the left and right horizontal rods are arranged on the left and right sides of the fixed body and are parallel to each other and have length adjusting assemblies, the two ends of the left and right arches are connected with the ear balls and the left and right horizontal rods respectively, the nose support part is arranged on the upper end of the fixed body, and the distance between the center points of the two ear balls corresponds to the value indicated on a condylar width scale. The infraorbital point assembly is used for measuring the spatial coordinates of an infraorbital point, and comprises an infraorbital point pointer and a pointer sliding block, the convex groove head of the pointer sliding block is embedded into the U-shaped hole of the infraorbital point pointer, and the infraorbital point pointer and the pointer sliding block are matched to realize front-back and transverse sliding. The condylar axis assembly is used for measuring the spatial coordinates of a condylar axis, and comprises a condylar axis pointer, a condylar axis sliding rod and a condylar axis sliding block, the condylar axis sliding rod slides along the front-back direction, the condylar axis sliding block slides along the vertical direction, and the condylar axis pointer slides left and right in the condylar axis sliding rod. The tracing assembly is used for condylar axis tracing and condylar process movement tracing, and comprises a T-shaped tracing plate, a tracing sliding block, a scale disc and scale paper, the horizontal plate of the T-shaped tracing plate has a U-shaped groove matched with the convex groove of the tracing sliding block, and the tracing plate slides in the front-back and left-right directions. The mandibular movement assembly is used for providing power for mandibular opening and closing during condylar axis tracing and condylar process movement tracing, and comprises a tracing pen, a tracing pen adjusting block, a silica gel gasket, an elastic rubber, a movement rod, a movement rod adjusting seat and a joint.

2. The digital jaw analysis instrument of claim 1, wherein, The left and right horizontal rods of the face-bow assembly have length adjusting assemblies with scale values corresponding to the extension lengths of the left and right horizontal rods.

3. The digital jaw analysis instrument of claim 1, wherein, The ear balls of the face-bow assembly have adjusting screws for adjusting the depths of the ear balls entering the external ear canals, when the ear ball adjusting screws are completely locked, the distance between the center points of the two ear balls is consistent with the condylar width scale value of the fixed body, and the sliding directions among the vertical sliding block, the horizontal sliding block and the nose support sliding rod of the nose support part are perpendicular to each other.

4. The digital jaw analysis instrument of claim 1, wherein, The plane formed by the vertex of the infraorbital point pointer and the center points of the two ear balls in the infraorbital point assembly is parallel to the plane formed by the left and right horizontal rods.

5. The digital jaw analysis instrument of claim 1, wherein, The moving directions of the face-bow assembly, the infraorbital point assembly, the condylar axis assembly, the tracing assembly, the mandibular movement assembly and the components on the five assemblies are parallel or perpendicular to the long axis of the left and right horizontal rods.

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