Tooth arrangement step-by-step simulation system based on condylar axis, medium and method

Abstract

The invention discloses a condylar axis-based tooth arrangement step-by-step simulation system, which comprises a left and right condylar process central point setting program module, an opening and closing movement program module, an occlusal plane adjustment program module, an angle calculation program module, a tooth arrangement program module, a collision detection program module, a step-by-step program module, a matrix storage program module and a simulation program module, the invention relates to a tooth arrangement step-by-step simulation method based on a condylar axis, which simulates real occlusion contact of anticlockwise rotation of a mandible of a patient step by step, in a simulation animation, movement of upper and lower teeth and rotation movement of the mandible around the condylar axis exist, and a real oral condition of the patient during correction is simulated. And a doctor can be assisted to intuitively observe the actual condition of the teeth of the patient.

Description

Technical Field

[0001] The invention relates to the field of dentistry, and in particular to a tooth arrangement step-by-step simulation system, medium and method based on the condylar axis. Background Art

[0002] In the current tooth arrangement system, after the final position of the teeth is determined, the movement of the teeth is broken down into steps according to a constant distance or angle and then played continuously. Or there is no tooth contact in the middle steps, and only in the last step the upper and lower teeth are directly placed in a state where all of them can touch each other. This is commonly known as "jumping". However, "jumping" does not conform to the actual clinical situation, and it also makes it impossible for doctors to check the changes in tooth movement during correction, which is even more difficult for patients to understand.

[0003] Since the teeth are moved in three dimensions and the final position is determined, the step-by-step process allows doctors and patients to view the slow process of tooth movement. This process does not take into account the rotational movement of the mandible. When the mandible is rotated around the condylar axis (the line connecting the center points of the left and right condyles) before arranging the teeth, there is no collision between the upper and lower teeth in the final position. The use of conventional step-by-step methods will cause serious collision and penetration between the upper and lower teeth or severe open jaws. In the actual situation in the patient's mouth, there is no collision and penetration between the upper and lower teeth. Especially for open jaw patients, after the upper and lower posterior teeth are lowered, the mandible will rotate counterclockwise until the upper and lower teeth come into contact and stop. The conventional step-by-step method of tooth arrangement is to align the upper and lower teeth step by step separately. In the last step, the mandibular tooth model jumps directly to the final position as a whole, and comes into occlusal contact with the maxillary tooth model. Such step-by-step simulation animations of tooth arrangement can also confuse patients and doctors.

[0004] Therefore, a step-by-step simulation system and method for tooth arrangement without collision, penetration or jaw opening is needed, which can realize the movement of the upper and lower teeth and the rotation of the mandible around the condylar axis in the step-by-step simulation animation, without collision or penetration between the upper and lower teeth, so as to simulate the real oral condition of the patient during correction. Summary of the invention

[0005] The purpose of the present invention is to design an occlusal contact based on the condylar axis simulation step by step of the patient's real mandibular counterclockwise rotation. In the simulation animation, there are both movement of the upper and lower teeth and rotational movement around the condylar axis. There is no collision or penetration between the upper and lower teeth, simulating the patient's real oral condition during correction. The simulation step-by-step system can assist the doctor to intuitively observe the actual situation of the patient's teeth. Not only the final positions of the upper and lower teeth are observed, but also the changes in the upper and lower teeth movement and the mandibular rotation matrix in a single step can be combined and displayed. The present invention provides a step-by-step simulation system and method for tooth arrangement based on the condylar axis.

[0006] A step-by-step simulation system for tooth arrangement based on condylar axis, comprising: The left and right condyle center point setting program module is used to set the coordinates of the left and right condyle center points; The opening and closing mouth movement program module is used to control the overall opening and closing mouth movement of the mandibular tooth model; An occlusal plane adjustment program module is used to adjust the incisal end point and the left and right posterior end points of the occlusal plane; Angle calculation program module, used to calculate the angle between two planes, two lines or rotational motion; Teeth arrangement program module, used to adjust and align teeth; A collision detection program module is used to detect the collision overlap amount of the upper and lower jaw tooth models; A step-by-step procedure module for interpolating the teeth of the upper and lower jaw tooth models from the initial position to the final position; A matrix storage program module is used to store the matrix of the opening and closing rotation movement of the mandibular tooth model; Simulator module for combined display of maxillary and mandibular tooth movements in a single step, and mandibular rotation matrix.

[0007] Furthermore, the left and right condylar center point setting program module is specifically used to determine and set the coordinates of the left and right condylar center points through X-ray head positioning lateral film images, CBCT images, face bow or mandibular movement trajectory recorder.

[0008] Furthermore, the opening and closing mouth movement program module is specifically used to control the mandibular tooth model to perform overall opening and closing mouth movement around the line connecting the center points of the left and right condyles, and the angle calculation program module is specifically used to calculate the angle of rotational movement generated by two planes, two lines or any point on the mandibular tooth model around the line connecting the center points of the left and right condyles.

[0009] Furthermore, the teeth arrangement program module is specifically used for automatically or manually adjusting and aligning teeth, and the occlusal plane adjustment program module is specifically used for adjusting the vertical height of the incisal end point and the left and right rear end points of the occlusal plane.

[0010] Furthermore, the collision detection program module is specifically used for detecting the collision position of the upper and lower jaw tooth models and displaying the overlap amount; the step-by-step program module is specifically used for interpolating the individual teeth of the upper and lower jaw tooth models from the initial position to the final position; and the matrix storage program module is specifically used for storing the matrix of the overall or individual step-by-step opening and closing rotational movement of the mandibular tooth model.

[0011] Furthermore, the simulation program module is specifically used for the combined display and simulation playback control of the upper and lower jaw tooth movements and the mandibular rotation matrix in a single step. Each single step displayed is an interpolation step based on the teeth of the upper and lower jaw tooth models from the initial position to the final position. It can not only accurately display the entire change of the upper and lower jaw teeth from the initial position to the final position, but also call out the change of each single step at any time, which is convenient for doctors to conduct case analysis.

[0012] In one embodiment, a step-by-step simulation method for tooth arrangement based on the condylar axis comprises the following steps: Step 1: Set the coordinates of the center points of the left and right condyles; Step 2: Set the occlusal plane, the vertical height of the incisor tip, and the anterior-posterior position of the upper incisor; Step 3: Calculate and display in real time the angle of the overall rotation of the mandibular tooth model (i.e., the angle between the condylar axis corresponding to the start and end positions of the mandibular tooth model when opening or closing the mouth and the connecting line between the incisor point and the lower incisor); Step 4: Adjust and align all teeth on the upper and lower jaw dental models; Step 5: Execute interpolation steps of the teeth of the upper and lower jaw tooth models from the initial position to the final position; Step 6: For each step, rotate the mandibular tooth model with the line connecting the center points of the left and right condyles as the axis to achieve the preset collision overlap amount (i.e., the maximum distance of mutual penetration and overlap of the upper and lower mandibular tooth models), and calculate the motion matrix of each step; Step 7: Perform the combined display of the maxillary and mandibular tooth movements and mandibular rotation matrices in a single step.

[0013] Furthermore, an electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute a step-by-step simulation method for tooth arrangement based on the condylar axis as described in the above embodiment.

[0014] Furthermore, a computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute a step-by-step simulation method for tooth arrangement based on the condylar axis as described in the above embodiment.

[0015] The invention discloses a tooth arrangement step-by-step simulation system based on the condylar axis, including: a left and right condylar center point setting program module, an opening and closing mouth movement program module, an occlusal plane adjustment program module, an angle calculation program module, a tooth arrangement program module, a collision detection program module, a step-by-step program module, a matrix storage program module and a simulation program module. A tooth arrangement step-by-step simulation method based on the condylar axis simulates the occlusal contact of the real mandible of the step-by-step patient in counterclockwise rotation. In the simulation animation, there are both movement of the upper and lower teeth and rotation movement of the mandible around the condylar axis. There is no collision or penetration between the upper and lower teeth, simulating the real oral condition of the patient during correction. The simulation step-by-step system can assist the doctor to intuitively observe the actual situation of the patient's teeth, not only observing the terminal positions of the upper and lower teeth, but also combining and displaying the changes in the upper and lower teeth movement and the mandibular rotation matrix in a single step. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of a program module for setting the center points of the left and right condyles in a step-by-step tooth arrangement simulation system based on the condylar axis; Figure 2 It is a schematic diagram of an occlusal plane adjustment program module and an angle calculation program module in a step-by-step simulation system for tooth arrangement based on the condylar axis; Figure 3 It is a schematic diagram of the mandibular tooth model making opening movement around the line connecting the center points of the left and right condylar axes; Figure 4 A schematic diagram of a step-by-step program module and a simulation program module in a step-by-step simulation system for tooth arrangement based on the condylar axis; Figure 5 The figure is a flow chart of a step-by-step simulation method for tooth arrangement based on the condylar axis.

[0018] On the figure: a-center point of the left condyle, b-center point of the right condyle, ab-line connecting the center points of the left and right condyles, c-incisor tip of the upper incisor, 10-occlusal plane, 11-line from the condylar axis to the incisor tip of the lower incisor before the mandibular tooth model makes opening movement, 12-line from the condylar axis to the incisor tip of the lower incisor after the mandibular tooth model makes opening movement, 13-incisor tip of the occlusal plane, 14-posterior tip of the occlusal plane, 20-angle of overall rotation of the mandibular tooth model, 30-collision overlap, 31-initial position of the mandibular tooth model, 32-final position of the mandibular tooth model after opening movement, 40-initial position of teeth of the upper and lower mandibular tooth models, 41-final position of teeth of the upper and lower mandibular tooth models, 42-step, 44-selection button to view the previous step, 45-selection button to view the next step. DETAILED DESCRIPTION

[0019] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the attached Figure 1-5 , wherein the same or similar reference numerals throughout represent the same or similar model structures or functional buttons. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not 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.

[0020] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the model referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Exemplarily, a step-by-step simulation system for tooth arrangement based on the condylar axis includes: a left and right condylar center point setting program module, a mouth opening and closing movement program module, an occlusal plane adjustment program module, an angle calculation program module, a tooth arrangement program module, a collision detection program module, a step-by-step program module, a matrix storage program module and a simulation program module.

[0022] Furthermore, a left and right condylar center point setting program module in a condylar axis-based step-by-step tooth arrangement simulation system determines and sets the coordinates of the left and right condylar center points through X-ray head positioning lateral film images, CBCT images, face bow or mandibular movement trajectory recorder, and the coordinates of the left and right condylar center points can be determined by one or more methods.

[0023] Furthermore, a program module for opening and closing movement in a step-by-step simulation system for tooth arrangement based on the condylar axis is specifically used to control the overall opening and closing movement of the mandibular tooth model around the line connecting the center points of the left and right condyles, and a program module for angle calculation is specifically used to calculate the angle of rotational movement generated by two planes, two lines or any point on the mandibular tooth model around the line connecting the center points of the left and right condyles.

[0024] Furthermore, a teeth arrangement program module in a condylar axis-based teeth arrangement step-by-step simulation system is specifically used for automatically or manually adjusting and aligning teeth, and an occlusal plane adjustment program module is specifically used for adjusting the vertical height of the incisal end point and the left and right rear end points of the occlusal plane.

[0025] Furthermore, a collision detection program module in a step-by-step simulation system of tooth arrangement based on the condylar axis is specifically used to detect the collision position detection and overlap display of the upper and lower mandibular tooth models; a step-by-step program module is specifically used for the interpolation step-by-step of a single tooth in the upper and lower mandibular tooth models from the initial position to the final position, and the interpolation method adopts the mean or non-mean interpolation method; a matrix storage program module is specifically used to store the matrix of the overall or single step-by-step opening and closing rotation movement of the mandibular tooth model; a simulation program module is specifically used for the combined display and simulation playback control of the upper and lower mandibular tooth movement and mandibular rotation matrix in a single step.

[0026] In one embodiment, a step-by-step simulation method for tooth arrangement based on the condylar axis comprises the following steps: Step 1: The left and right condyle center point setting program module sets the coordinates of the left condyle center point a and the right condyle center point b; Step 2: The occlusal plane adjustment program module sets the occlusal plane 10, adjusts the vertical height of the incisal end point 13 of the occlusal plane, the vertical height of the posterior end point 14 of the occlusal plane, sets the vertical height of the incisal end point c of the upper incisor, and the anterior-posterior position of the upper incisor; Step 3: The angle calculation program module calculates and displays in real time the line 11 from the condylar axis to the incisor point of the mandibular tooth model before the opening movement, the line 12 from the condylar axis to the incisor point of the mandibular tooth model after the opening movement, and the angle 20 of the overall rotation movement of the mandibular tooth model; Step 4: The tooth arrangement program module adjusts and aligns all teeth on the upper and lower jaw tooth models; Step 5: the step program module executes the interpolation step 42 of the teeth of the upper and lower tooth models from the initial tooth positions 40 of the upper and lower tooth models to the final tooth positions 41 of the upper and lower tooth models; Step 6: The opening and closing movement program module displays the initial position 31 of the mandibular tooth model and the final position 32 of the mandibular tooth model after the opening movement in real time, and rotates the mandibular tooth model with the line ab connecting the center points of the left and right condyles as the axis for each step to achieve the collision overlap amount 30 preset by the collision detection program module, and the matrix storage program module stores the matrix of the opening and closing rotation movement of the mandibular tooth model; Step 7: The simulation program module performs a combined display of the maxillary and mandibular tooth movements and the mandibular rotation matrix in a single step, and then views the previous step by clicking the selection button 44 for viewing the previous step, and views the next step by clicking the selection button 45 for viewing the next step.

[0027] The invention discloses a tooth arrangement step-by-step simulation system based on the condylar axis, including: a left and right condylar center point setting program module, an opening and closing mouth movement program module, an occlusal plane adjustment program module, an angle calculation program module, a tooth arrangement program module, a collision detection program module, a step-by-step program module, a matrix storage program module and a simulation program module. A tooth arrangement step-by-step simulation method based on the condylar axis simulates the occlusal contact of the real mandible of the step-by-step patient in counterclockwise rotation. In the simulation animation, there are both movement of the upper and lower teeth and rotational movement around the condylar axis. There is no collision or penetration between the upper and lower teeth, simulating the real oral condition of the patient during correction. The simulation step-by-step system can assist the doctor to intuitively observe the actual situation of the patient's teeth, not only observing the terminal positions of the upper and lower teeth, but also combining and displaying the changes in the upper and lower teeth movement and the mandibular rotation matrix in a single step.

[0028] 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.

[0029] 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 step-by-step simulation system for tooth arrangement based on the condylar axis, characterized in that: include: The left and right condyle center point setting program module is used to set the coordinates of the left and right condyle center points; The opening and closing mouth movement program module is used to control the overall opening and closing mouth movement of the mandibular tooth model; An occlusal plane adjustment program module is used to adjust the incisal end point and the left and right posterior end points of the occlusal plane; Angle calculation program module, used to calculate the angle between two planes, two lines or rotational motion; Teeth arrangement program module, used to adjust and align teeth; A collision detection program module is used to detect the collision overlap amount of the upper and lower jaw tooth models; A step-by-step procedure module for interpolating the teeth of the upper and lower jaw tooth models from the initial position to the final position; A matrix storage program module is used to store the matrix of the opening and closing rotation movement of the mandibular tooth model; Simulator module for combined display of maxillary and mandibular tooth movements and mandibular rotation matrices in a single step.

2. The condylar axis-based tooth arrangement step-by-step simulation system according to claim 1, characterized in that: The left and right condylar center point setting program module is specifically used to determine and set the coordinates of the left and right condylar center points through X-ray head positioning lateral film images, CBCT images, face bow or mandibular movement trajectory recorder.

3. The step-by-step simulation system for tooth arrangement based on the condylar axis according to claim 1, characterized in that: The opening and closing mouth movement program module is specifically used to control the mandibular tooth model to perform overall opening and closing mouth movement around the line connecting the center points of the left and right condyles. The angle calculation program module is specifically used to calculate the angle of rotational movement generated by two planes, two lines or any point on the mandibular tooth model around the line connecting the center points of the left and right condyles.

4. The step-by-step simulation system for tooth arrangement based on the condylar axis according to claim 1, characterized in that: The teeth arrangement program module is specifically used for automatically or manually adjusting and aligning teeth, and the occlusal plane adjustment program module is specifically used for adjusting the vertical height of the incisal end point and the left and right rear end points of the occlusal plane.

5. The step-by-step simulation system for tooth arrangement based on the condylar axis according to claim 1, characterized in that: The collision detection program module is specifically used for collision position detection and overlap display of upper and lower jaw tooth models; the step-by-step program module is specifically used for interpolation step-by-step of single teeth of upper and lower jaw tooth models from initial position to final position; the matrix storage program module is specifically used for storing the matrix of the overall or single-step opening and closing rotation movement of the mandibular tooth model; the simulation program module is specifically used for the combined display and simulated playback control of the upper and lower jaw tooth movement and mandibular rotation matrix in a single step.

6. A step-by-step simulation method for tooth arrangement based on the condylar axis, characterized in that: The following steps are involved: Step 1: Set the coordinates of the center points of the left and right condyles; Step 2: Set the occlusal plane, the vertical height of the incisor tip, and the anterior-posterior position of the upper incisor; Step 3: Calculate and display in real time the angle of overall rotation of the mandibular tooth model; Step 4: Adjust and align all teeth on the upper and lower jaw dental models; Step 5: Execute interpolation steps of the teeth of the upper and lower jaw tooth models from the initial position to the final position; Step 6: For each step, the mandibular tooth model is rotated with the line connecting the center points of the left and right condyles as the axis to achieve the preset collision overlap amount, and the motion matrix of each step is calculated; Step 7: Perform the combined display of the maxillary and mandibular tooth movements and mandibular rotation matrices in a single step.

7. An electronic device, characterized in that: include: at least one processor; as well as, A memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor so that the at least one processor can execute a step-by-step simulation method for tooth arrangement based on the condylar axis as described in claim 6.

8. A computer-readable storage medium storing instructions, which, when executed on a computer, enable the computer to execute the step-by-step simulation method for tooth arrangement based on the condylar axis as described in claim 6.

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