Digital jaw position analysis system and method

Abstract

The present invention discloses a digital jaw position analysis system and method, wherein the digital jaw position analysis system comprises: a registration program module, a left and right condylar width setting program module, a condylar coordinate setting program module, an infraorbital point coordinate setting program module, a condylar coordinate system generation program module, a matrix calculation program module, an output program module and a joint display program module, and measures the vertical and horizontal movement of the condylar center point and the midpoint of the line connecting the left and right condylar center points, and is used for checking whether the jaw position of orthodontic patients or prosthetic patients is abnormal. The digital jaw position analysis method avoids the cumbersome steps of traditional plaster model maxillary frame analysis, and achieves the effect of being simple, efficient, and capable of repeated viewing and analysis.

Description

Technical Field

[0001] The present invention relates to the field of dentistry, and in particular to a digital jaw position analysis system and method. Background Art

[0002] The temporomandibular joint is a complex joint. The left and right temporomandibular joints can complete complex occlusal movements. The mandible connects the teeth and condyles into a whole. The jaw position usually refers to the position of the mandible under different tooth occlusion states. From a professional perspective, there are two commonly used jaw positions. One is the centric relation position (abbreviated as CR position), which refers to the position of the mandible relative to the maxilla when the condyle is located in the most anterior and superior position in the articular fossa and the condyle is directly opposite the posterior slope of the articular tubercle. At this time, the mandible can be simply hinged, and the condyle and articular fossa can resist the maximum contraction force of the jaw lifting muscles without any discomfort. It is a stable position with good repeatability. The other is the intercuspal position (abbreviated as ICP position), which refers to the position of the mandible when the cusps and fossa of the upper and lower teeth are in the most extensive and stable contact. Some scholars also call it the maximum intercuspal position (abbreviated as MI, MIC, MIP position). This position is a common position during chewing.

[0003] ICP is relatively easy to determine clinically, which is the position of the mandible where the upper and lower teeth are in the widest contact during chewing. To confirm the CR position clinically, it is usually necessary to have the patient repeatedly do a small mouth opening exercise, and use wax biting to obtain the position of the mandible without the upper and lower teeth in contact. The most ideal occlusal state is when the CR position coincides with the ICP position.

[0004] When the mandible starts to close from the CR position with a small mouth opening, and the upper and lower teeth begin to contact, if it does not reach the ICP position at this time, due to the effect of the cusp bevel and the combined influence of the temporalis muscle, masticatory muscle and other muscle systems on the mandible, the mandible needs to shift a little to reach the ICP position where the upper and lower teeth are in extensive contact. In this process, the mandible moves under the guidance of the cusps, and the left and right condyles also shift at the same time. If the condyle moves too much, the condyle will squeeze the articular fossa, causing symptoms such as temporomandibular joint pain and clicking when opening and closing the mouth.

[0005] Studies have found that 85% of patients have vertical ICP-CR discrepancies, 87% of patients have horizontal ICP-CR discrepancies, and only 3.1% of high-angle patients have completely consistent ICP-CR. In clinical treatment, it should be observed whether the condyle is in the CR position to facilitate the stability of the correction effect.

[0006] The traditional method of jaw position analysis in CR and ICP positions requires taking plaster models of the upper and lower jaws respectively, taking a bite record (also called bite wax) in the CR position, and taking a bite record in the ICP position. The occlusal fork is fixed to the maxillary tooth model, and the face bow and the occlusal fork are connected by a universal joint to obtain the relationship between the face bow and the maxillary tooth model (usually the ear ball of the face bow is used instead of the condyle), and the relationship is transferred to a specially designed jaw frame. The maxillary tooth model is fixed on the jaw frame, and the mandibular tooth model is moved through the two bite records of CR and ICP, so that the offset of the condyle can be marked through the grid table on the jaw frame.

[0007] Such a traditional jaw analysis process is very complicated and time-consuming. Some clinicians cannot complete it alone. They usually take the upper and lower jaw tooth models and the occlusal records of CR and ICP positions, express them to the denture factory for jaw analysis, and then return to measure the results, which delays clinical diagnosis. At the same time, the analysis result only obtains a grid table of condylar displacement. If you want to check it again after a few months or half a year, it is also cumbersome. You need to save a large number of plaster models and bite wax, and the bite wax will deform or even break after repeated operations, resulting in errors between the secondary analysis and the initial analysis. If the patient needs to compare and check the treatment effect after treatment, comparative analysis cannot be achieved. At the same time, the traditional physical jaw frame, due to hardware limitations, can only record the vertical and anterior-posterior movement of the condyle, and cannot record the horizontal movement of the condyle. Therefore, this type of jaw frame is designed with a structure to measure the horizontal movement of the midpoint of the line connecting the center points of the left and right condyles, but the movement of the midpoint is still very different from the actual horizontal movement of the left and right condyles.

[0008] Therefore, there is an urgent need for a jaw position analysis system and method that can be conveniently used by doctors in clinical practice and can be repeatedly viewed and compared for analysis. Summary of the invention

[0009] The purpose of the present invention is to replace the traditional plaster model maxillary frame to analyze the jaw position by a digital method, measure the vertical and horizontal movement of the condyle center point and the midpoint of the line connecting the left and right condyle center points, and use it to check whether the jaw position of orthodontic patients or prosthetic patients is abnormal. To achieve the above purpose, the present invention provides a digital jaw position analysis system and method.

[0010] A digital jaw position analysis system, comprising:

[0011] Registration program module, used for tooth model, tooth model, occlusal fork, universal joint,

[0012] Mutual registration between facebows;

[0013] The left and right condylar width setting program module is used to set the width between the left and right condylar center points.

[0014] distance;

[0015] Condylar coordinate setting program module, used to set the coordinates of the center points of the left and right condyles;

[0016] The infraorbital point coordinate setting program module is used to set the infraorbital point coordinates;

[0017] A condylar coordinate system generating program module is used to generate a condylar coordinate system;

[0018] Matrix calculation program module, used to calculate the transformation matrix;

[0019] An output program module is used for outputting the condylar center point offset value;

[0020] The joint display program module is used to display the standard three-dimensional model of the condyle and glenoid fossa.

[0021] Furthermore, the registration program module is used for mutual registration between tooth models, tooth models, occlusal forks, universal joints, and face bows. It does not necessarily need to be a complete face bow, but only needs to obtain the spatial relationship between the maxillary dental model and the condyle. The face bow uses the ear ball instead of the condyle, and uses the coordinate system of the maxillary dental model as the global coordinate system, or the coordinate system of the condyle as the global coordinate system.

[0022] Furthermore, the left and right condyle width setting program module is used to set the distance between the center points of the left and right condyles. The value is input into the left and right condyle width setting program module according to the condyle width actually measured by the face bow to ensure accurate positioning of the condyle center point.

[0023] Furthermore, the condylar coordinate system generating program module is specifically used to use the line connecting the left and right condylar center points ab as the Y axis, the plane formed by the line connecting the infraorbital point o and the left condylar center point a and the right condylar center point b as the horizontal plane, draw a perpendicular line to the Y axis through point a or point b in the horizontal plane to obtain the X axis, draw a perpendicular line perpendicular to the horizontal plane through point a or point b as the Z axis, generate the condylar coordinate system A with the left condylar center point a as the origin, and the three coordinate axes are X1, Y1, and Z1 respectively, and generate the condylar coordinate system B with the right condylar center point b as the origin, and the three coordinate axes are X2, Y2, and Z2 respectively.

[0024] Furthermore, the condyle coordinate setting program module moves the left and right condyle center points to the set spatial positions after setting the coordinates of the left and right condyle center points.

[0025] Furthermore, the infraorbital point coordinate setting program module is used to set the infraorbital point coordinates, and the position of the infraorbital point can be set by inputting a numerical value so as to accurately construct the spatial position of the condylar coordinate system.

[0026] Furthermore, the matrix calculation program module is used to calculate the transformation matrix, and obtain the spatial positions of the center points of the left and right condyles after the transformation by calculating the transformation matrix of the mandibular tooth model in the CR and ICP positions.

[0027] Furthermore, the output program module outputs the offset values ​​of the left and right condyle center points in the condyle coordinate systems A and B, and outputs the offset value of the midpoint of the line connecting the left and right condyle center points in the horizontal plane.

[0028] Furthermore, when the output program module outputs the condylar center point offset value, the offset value of the left condylar center point in the condylar coordinate system A is an offset in the directions of the three coordinate axes X1, Y1, and Z1, and the offset value of the right condylar center point in the condylar coordinate system B is an offset in the directions of the three coordinate axes X2, Y2, and Z2.

[0029] Furthermore, the joint display program module displays a standard three-dimensional model of the condyle and glenoid fossa.

[0030] In one embodiment, a digital jaw position analysis method includes:

[0031] Step 1: Obtain the spatial position relationship between the maxillary tooth model and the condyle in the CR position;

[0032] Step 2: Execute the condylar width value input by the left and right condylar width setting program module, adjust the distance between the left and right condylar center points a and b to be consistent with the value, input the left and right condylar center point coordinate values ​​in the left and right condylar center point coordinate module, and move the spatial positions of the left and right condylar center points to be consistent with the coordinate values;

[0033] Step 3, executing the infraorbital point coordinate value input by the infraorbital point coordinate setting program module, and moving the infraorbital point o to the spatial position;

[0034] Step 4, import the mandibular tooth model in the CR position, bind it to the spatial positions of the left and right condyle center points a and b, and obtain the first spatial position E of the left and right condyle center points and the first condyle axis connecting line ab;

[0035] Step 5, import the upper and lower jaw tooth models at the ICP position, align and overlap the upper jaw tooth model at the ICP position with the upper jaw tooth model at the CR position, and move the mandibular tooth model at the ICP position to follow the upper jaw tooth model. The mandibular tooth model at the ICP position after moving is aligned with the mandibular tooth model at the CR position, and the spatial transformation matrix G of the two is calculated through the matrix calculation program module;

[0036] Step 6, move the left and right condylar center points a and b from position E according to the spatial transformation matrix G to obtain points c and d respectively, and obtain the second spatial position F of the left and right condylar center points and the second condylar axis connecting line cd;

[0037] Step 7, calculate the offset values ​​of the three plane projection points from point a to point c in the condylar coordinate system A, calculate the offset values ​​of the three plane projection points from point b to point d in the condylar coordinate system B, make a vertical plane to the line connecting the center points a and b of the left and right condyles, and calculate the offset values ​​of the projection points from point a to point b and from point c to point d on the vertical plane;

[0038] Step 8, the midpoint e of the line connecting the condylar center points a and b, and the midpoint f of the line connecting c and d, calculate the offset value of the projection point from e to f on the horizontal plane;

[0039] Step nine, output the offset value of the center points of the left and right condyles, and output the offset value of the midpoint of the line connecting the center points of the condyles.

[0040] Furthermore, step three may be performed before any step between step two and step seven.

[0041] Furthermore, in step four, the mandibular tooth model in the ICP position is first imported, and then the mandibular model in the CR position is imported. In the remaining steps, the ICP position is replaced with the CR position, and the offset value of the center point of the left and right condyles is output, and the offset value of the midpoint of the line connecting the center points of the condyles is output.

[0042] Furthermore, the step five may also import the bite record of the ICP position, align the bite record with the maxillary tooth model of the CR position, and then align the mandibular tooth model of the CR position with the bite record, and then the mandibular tooth model may be moved to the ICP position.

[0043] The present invention discloses a digital jaw position analysis system, comprising: a registration program module, a left and right condylar width setting program module, a condylar coordinate setting program module, an infraorbital point coordinate setting program module, a condylar coordinate system generation program module, a matrix calculation program module, an output program module and a joint display program module. A digital jaw position analysis method is a process of replacing the traditional plaster model maxillary frame to analyze the jaw position by a digital method, and measures the vertical and horizontal movement of the condylar center point and the midpoint of the line connecting the left and right condylar center points. It is a convenient method that can be convenient for doctors to use clinically, and is used for checking whether the jaw position of orthodontic patients or prosthodontic patients is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1is a schematic diagram of a digital jaw position analysis system;

[0046] Figure 2 A schematic diagram of a condylar coordinate system on a digital jaw position analysis system;

[0047] Figure 3 A schematic diagram of a condylar coordinate setting program module on a digital jaw position analysis system;

[0048] Figure 4 A schematic diagram of a program module for generating a condylar coordinate system on a digital jaw position analysis system;

[0049] Figure 5 A schematic diagram of a matrix calculation program module on a digital jaw position analysis system;

[0050] Figure 6 A schematic diagram of a process of a digital jaw position analysis method;

[0051] In the figure: 10-digital jaw position analysis system, 11-left and right condylar width setting program module, 12-condylar coordinate setting program module, 21-left and right condylar center points, 13-infraorbital point coordinate setting program module, 15-condylar coordinate system generation program module, 51-offset value of the midpoint of the line connecting the left and right condylar center points in the horizontal plane, 52-vertical plane, 16-matrix calculation program module, Mesial-mesial, Distal-distal, Left Shift-left shift, Right Shift-right shift. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention. All other embodiments obtained by ordinary technicians in the field without creative work based on the embodiments of the present invention are within the scope of protection of the present invention.

[0053] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] See also Figure 1 The present invention provides a digital jaw position analysis system 10 including: a left and right condylar width setting program module 11, a left and right condylar center point coordinate setting program module 12, an infraorbital point coordinate setting program module 13, a condylar coordinate system generation program module 15, a matrix calculation program module 16 and an output program module.

[0056] See also Figure 4 A condylar coordinate system generation program module in a digital jaw position analysis system, with the line connecting ab as the Y axis, the plane formed by the line connecting the infraorbital point o and the points a and b as the horizontal plane, a perpendicular line through point a or point b on the horizontal plane to the Y axis is used to obtain the X axis, a perpendicular line through point a or point b to the horizontal plane is used as the Z axis, the condylar coordinate system A is generated with the center point a of the left condyle as the origin, and the three coordinate axes are X1, Y1, and Z1 respectively, and the condylar coordinate system B is generated with the center point b of the right condyle as the origin, and the three coordinate axes are X2, Y2, and Z2 respectively.

[0057] See also Figure 3 A left and right condyle center point coordinate setting program module 12 in a digital jaw position analysis system directly moves the left and right condyle center points to the set positions by setting the coordinates of the left and right condyle center points 21.

[0058] See also Figure 3 , an output program module in a digital jaw position analysis system, outputs the offset value of the left and right condyle center points in the condyle coordinate system A and B and the offset value 51 of the midpoint of the line connecting the left and right condyle center points in the horizontal plane.

[0059] Furthermore, the offset of the center points of the left and right condyles in the condyle coordinate systems A and B is an offset in the directions of the three coordinate axes of X, Y, and Z in the condyle coordinate system.

[0060] See also Figure 2 and Figure 6 , a method for using a digital jaw position analysis system,

[0061] Embodiment 1 comprises the following steps:

[0062] Step 1: Obtain the spatial position relationship between the maxillary tooth model and the condyle in the CR position;

[0063] Furthermore, the maxillary and mandibular tooth models, occlusal fork, universal joint, and face bow in the CR position were scanned by a scanner, the maxillary tooth model was registered with the occlusal fork, and the occlusal fork was registered with the face bow through the universal joint, so as to obtain the spatial position relationship between the maxillary tooth model and the condyle. The center point of the ear ball of the face bow was used to replace the center point of the condyle.

[0064] Step 2: Execute the condylar width value input by the left and right condylar width setting program module, adjust the distance between the left and right condylar center points a and b to be consistent with the value, input the left and right condylar center point coordinate values ​​in the condylar coordinate setting program module, and move the spatial positions of the left and right condylar center points to be consistent with the coordinate values;

[0065] Furthermore, according to the condylar width measured by the face bow, the value is input into the left and right condylar width setting module to ensure that the condylar center point is accurately positioned. The left and right condylar widths are set according to the average method, and the commonly used values ​​are 95mm for children, 100mm for adolescents, and 110mm for adults.

[0066] Furthermore, when the input coordinate value of the center point of the left and right condyles is 0, the positions of the center points of the left and right condyles are not moved.

[0067] Step 3, executing the infraorbital point coordinate value input by the infraorbital point coordinate program setting module, and moving the infraorbital point o to the spatial position;

[0068] Furthermore, the coordinate value of the infraorbital point o can be set to a non-infraorbital point position. When the coordinate value is set at the nose wing position, the plane formed by the infraorbital point o and the left and right condylar center points a and b is the commonly used nose wing auricle surface.

[0069] Furthermore, step three may be performed before any step between step two and step seven.

[0070] Step 4, import the mandibular tooth model at the CR position, bind it to the spatial positions of the left and right condyle center points a and b, and obtain the first spatial position E of the left and right condyle center points and the first condyle axis connecting line ab;

[0071] Step 5, import the upper and lower jaw tooth models at the ICP position, align and overlap the upper jaw tooth model at the ICP position with the upper jaw tooth model at the CR position, and move the mandibular tooth model at the ICP position to follow the upper jaw tooth model. The mandibular tooth model at the ICP position after moving is aligned with the mandibular tooth model at the CR position, and the spatial transformation matrix G of the two is calculated through the matrix calculation program module;

[0072] Furthermore, if the doctor only scanned independent upper and lower mandibular tooth models and two bite records at ICP and CR positions, the upper and lower mandibular tooth models are aligned with the bite record at ICP position to obtain the upper and lower mandibular tooth models at ICP position, and the upper and lower mandibular tooth models are aligned with the bite record at CR position to obtain the upper and lower mandibular tooth models at CR position.

[0073] Furthermore, the registration method adopts three-point registration commonly used in dentistry or tooth surface feature area registration.

[0074] See also Figure 5 , step six, move the left and right condylar center points a and b from position E according to the spatial transformation matrix G, obtain points c and d respectively, obtain the second spatial position F of the left and right condylar center points, and the second condylar axis connecting line cd;

[0075] See also Figure 4 Step 7, calculate the offset values ​​of the three plane projection points from point a to point c in the condylar coordinate system A, calculate the offset values ​​of the three plane projection points from point b to point d in the condylar coordinate system B, make a vertical plane 52 to the line connecting the left and right condylar center points a and b, and calculate the offset values ​​of the projection points from point a to point b and from point c to point d on the vertical plane;

[0076] Furthermore, the vertical plane 52 may be a vertical plane of any point on the line connecting a and b or on the extended line.

[0077] Step 8, the midpoint e of the line connecting the condylar center points a and b, and the midpoint f of the line connecting c and d, calculate the offset value of the projection point from e to f on the horizontal plane;

[0078] Step nine, output the offset values ​​of the left and right condyle center points, and output the offset value 51 of the midpoint of the line connecting the condyle center points;

[0079] Furthermore, another method for using a digital jaw position analysis system is provided, in step one, the maxillary tooth model at the ICP position is imported, in step four, the mandibular tooth model at the ICP position is imported, and in the remaining steps, the ICP position is replaced with the CR position, and the offset values ​​of the center points of the left and right condyles in the condylar coordinate systems A and B are output, and the offset value of the midpoint of the line connecting the center points of the left and right condyles in the horizontal plane is output.

[0080] Furthermore, the output program module outputs the offset value of the left and right condylar center points to determine whether the CR position is coordinated with the ICP position. Ideally: CR=ICP, acceptable range: anteroposterior ≤1mm, vertical ≤1mm, lateral ≤0.5mm, the greater the reading difference, the higher the probability of TMJ symptoms. Therefore, the pursuit of consistency between CR and ICP, or the coordination of the centric relationship position with the cusp interdigitation position, is the first goal pursued by the present invention.

[0081] The present invention discloses a digital jaw position analysis system, comprising: a registration program module, a left and right condylar width setting program module, a condylar coordinate setting program module, an infraorbital point coordinate setting program module, a condylar coordinate system generation program module, a matrix calculation program module, an output program module and a joint display program module. A digital jaw position analysis method is a process of replacing the traditional plaster model maxillary frame to analyze the jaw position by a digital method, and measures the vertical and horizontal movement of the condylar center point and the midpoint of the line connecting the left and right condylar center points. It is a convenient method that can be convenient for doctors to use clinically, and is used for checking whether the jaw position of orthodontic patients or prosthodontic patients is abnormal.

[0082] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0083] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A digital jaw position analysis system, characterized in that: Include: A registration program module is used to set the spatial position relationship between the maxillary tooth model and the condyle; Bilateral condylar width setting program module, used to set the bilateral condylar center distance; Condylar coordinate setting program module, used to set the coordinates of the center points of the left and right condyles; The infraorbital point coordinate setting program module is used to set the infraorbital point coordinates; A local coordinate system generating program module is used to generate a local coordinate system, wherein the module is specifically used to use the line connecting the left and right condyle center points a and b as the Y axis, the plane formed by the line connecting the infraorbital point o and the left condyle center point a and the right condyle center point b as the horizontal plane, draw a perpendicular line to the Y axis through point a or point b on the horizontal plane to obtain the X axis, draw a perpendicular line to the horizontal plane through point a or point b as the Z axis, generate a local coordinate system A with the left condyle center point a as the origin, and the three coordinate axes are X1, Y1, and Z1 respectively, and generate a local coordinate system B with the right condyle center point b as the origin, and the three coordinate axes are X2, Y2, and Z2 respectively; A matrix calculation program module is used to calculate the matrix of the transformation matrix; An output program module is used for outputting the condylar center point offset value; The joint display program module is used to display the standard model of the condyle and glenoid fossa.

2. The digital jaw position analysis system according to claim 1, characterized in that: The condyle coordinate setting program module moves the left and right condyle center points to the set spatial positions after setting the coordinates of the left and right condyle center points.

3. The digital jaw position analysis system according to claim 1, characterized in that: The output program module is specifically used to output the offset values ​​of the left and right condyle center points in the local coordinate systems A and B, and output the offset value of the midpoint of the line connecting the left and right condyle center points in the horizontal plane.

4. The digital jaw position analysis system according to claim 3, characterized in that: When the output program module outputs the condylar center point offset value, the offset value of the left condylar center point in the local coordinate system A is the offset in the directions of the three coordinate axes X1, Y1, and Z1, and the offset value of the right condylar center point in the local coordinate system B is the offset in the directions of the three coordinate axes X2, Y2, and Z2.

5. The digital jaw position analysis system according to any one of claims 1 to 4, characterized in that: The joint display program module displays the standard three-dimensional model of the condyle and glenoid fossa.

6. A digital jaw position analysis method, characterized in that: The digital jaw position analysis system according to any one of claims 1 to 5, wherein the method comprises: Step 1: Obtain the spatial position relationship between the maxillary tooth model and the condyle in the CR position; Step 2: Input the condylar width value in the bilateral condylar width setting module, adjust the distance between the left and right condylar center points a and b to be consistent with the value, input the left and right condylar center point coordinate values ​​in the left and right condylar center point coordinate module, and move the spatial positions of the left and right condylar center points to be consistent with the coordinate values; Step 3: Input the coordinate value of the infraorbital point in the infraorbital point coordinate setting module, and move the infraorbital point O to the spatial position; Step 4, import the mandibular tooth model in the CR position, bind it to the spatial positions of the left and right condyle center points a and b, and obtain the first spatial position E of the left and right condyle center points and the first condyle axis connecting line ab; Step 5, import the upper and lower jaw tooth models at the ICP position, align and overlap the upper jaw tooth model at the ICP position with the upper jaw tooth model at the CR position, and the mandibular tooth model at the ICP position moves the spatial position following the upper jaw tooth model, and align the moved mandibular tooth model at the ICP position with the mandibular tooth model at the CR position, and calculate the spatial transformation matrix G of the two through the matrix transformation calculation module; Step 6, move the left and right condylar center points a and b from position E according to the spatial transformation matrix G to obtain points c and d respectively, and obtain the second spatial position F of the left and right condylar center points and the second condylar axis connecting line cd; Step 7, calculate the offset values ​​of the three plane projection points from point a to point c in the condylar local coordinate system A, calculate the offset values ​​of the three plane projection points from point b to point d in the condylar local coordinate system B, make a vertical plane to the line connecting the center points a and b of the left and right condyles, and calculate the offset values ​​of the projection points from point a to point b and from point c to point d on the vertical plane; Step 8, the midpoint e of the line connecting the condylar center points a and b, and the midpoint f of the line connecting c and d, calculate the offset value of the projection point from e to f on the horizontal plane; Step nine, output the offset value of the center points of the bilateral condyles, and output the offset value of the midpoint of the line connecting the center points of the condyles.

7. The digital jaw position analysis method according to claim 6, characterized in that: The maxillary tooth model at the ICP position is imported in step one, and the mandibular tooth model at the ICP position is imported in step four. In the remaining steps, the ICP position is replaced with the CR position, and the offset value of the center points of the bilateral condyles is output, and the offset value of the midpoint of the line connecting the center points of the condyles is output.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to claim 6 or 7 is implemented.

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