Tooth arrangement system based on occlusion separation angle, medium and method

Abstract

The invention discloses a tooth arrangement system based on an occlusal separation angle. The tooth arrangement system comprises a registration program module, a left and right condylar process central point setting program module, an occlusal plane adjusting program module, an angle calculation program module, an opening and closing mouth movement program module, an automatic tooth arrangement program module, a dental arch line adjusting program module and a tooth movement program module, according to the tooth arrangement method based on the condylar axis occlusal separation angle, the ideal occlusal separation angle serves as the target to calculate the appropriate occlusal plane angle, the angle of the mandibular plane angle reaches the normal range, a doctor is assisted in formulating a better correction scheme, and the tooth arrangement accuracy is improved. The correction result is more stable, and the tooth occlusion function reaches the optimal state.

Description

Technical Field

[0001] The present invention relates to the field of dentistry, and in particular to a tooth arrangement system, a medium and a method based on an occlusal separation angle. Background Art

[0002] The masticatory system must perform its functions in a low energy mode, so it is crucial to maximize masticatory efficiency. The teeth that perform the function must have good occlusal cusp anatomy, and the lower teeth must move within the minimum distance between the upper and lower dental arches without occlusal interference. This gap between the upper and lower teeth during functional movement is defined as the Disclusion angle (DA), and its value is expressed in degrees, which determines the minimum space between the teeth during movement, so that there is no contact between the teeth and their excessive separation is avoided. The smallest gap between the upper and lower teeth has good chewing efficiency and the system consumes the least energy.

[0003] Occlusal interference refers to certain occlusal contacts that hinder or interfere with the smooth and coordinated occlusal movement of the mandible while maintaining tooth contact, causing the mandibular movement to deviate. This type of abnormal occlusal contact is called occlusal interference, including protrusive occlusal interference, lateral occlusal interference, and retractive occlusal interference. When the occlusal separation angle is appropriate, the posterior teeth will not produce occlusal interference. When the mandible moves forward, the condyle will slide forward and downward along the inclined surface of the posterior wall of the articular tubercle. The angle between the posterior inclined surface of the articular tubercle and the orbitoauricular plane is called the sagittal condylar inclination (SCI). The angle between the occlusal plane and the orbitoauricular plane is called the occlusal plane inclination (OPI). SCI minus OPI is the relative condylar inclination (RCI). The calculation formula is: SCI-OPI=RC, RCI-CI=DA.

[0004] The occlusal separation angle is usually used in oral rehabilitation. When making a denture crown, it is necessary to consider that no occlusal interference should be generated, and at the same time, the best chewing function should be achieved. At present, the occlusal interference factor is not taken into account in orthodontic treatment, and the conventional tooth arrangement system does not know how many degrees of occlusal plane angle can achieve the best occlusal separation angle. Therefore, there is a need for a tooth arrangement system and method that rotates the mandible based on the condylar axis, calculates the appropriate occlusal plane angle with the ideal occlusal separation angle as the goal, and makes the angle of the mandibular plane within the normal range, so as to assist doctors in formulating better correction plans, make the correction results more stable, and achieve the best tooth occlusal function. Summary of the invention

[0005] The present invention discloses a tooth arrangement system and method based on the condylar axis occlusal separation angle, which calculates the appropriate occlusal plane angle with the ideal occlusal separation angle as the target, and makes the angle of the mandibular plane angle reach within the normal range, thereby assisting doctors in formulating better correction plans, making the correction results more stable, and achieving the optimal tooth occlusal function.

[0006] A tooth arrangement system based on occlusal separation angle, comprising:

[0007] Registration program module, used for registration of upper and lower jaw tooth models with X-ray images;

[0008] The left and right condyle center point setting program module is used to set the coordinates of the left and right condyle center points;

[0009] 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;

[0010] Angle calculation program module, used to calculate the angle between two planes, two lines or rotational motion;

[0011] The opening and closing mouth movement program module is used to control the overall opening and closing mouth movement of the mandibular tooth model;

[0012] Automatic teeth arrangement program module, used to automatically align all teeth;

[0013] Dental arch line adjustment program module, used to adjust the dental arch line shape of the upper and lower jaw tooth models and move the overall dental arch line forward and backward position;

[0014] A tooth movement program module for moving and extracting teeth on a dental model;

[0015] A collision detection program module is used to detect the collision overlap amount of the upper and lower jaw tooth models;

[0016] Overlap display program module, used to display the changes of dental arch and tooth position before and after movement;

[0017] The movement output program module is used to display and output the movement of teeth.

[0018] Furthermore, the registration program module is specifically used to register the upper and lower tooth models with the two-dimensional X-ray cephalographic image or the three-dimensional CBCT image. After the crowns of the upper and lower tooth models are segmented from the models, the crowns are projected onto the two-dimensional X-ray cephalographic image for registration, which is more convenient to operate. The crowns of the upper and lower tooth models can also be registered with the three-dimensional CBCT image, which is more accurate, but takes longer time.

[0019] Furthermore, the left and right condylar center point setting 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 and mandibular movement trajectory recorder.

[0020] Furthermore, the positions of the center points of the left and right condyles can be obtained by the following four methods: the first method is to overlap the upper and lower tooth models with the X-ray head positioning lateral film, and set the estimated position of the condyle center point on the X-ray head positioning lateral film by the mean method; the second method is to overlap the upper and lower tooth models with the CBCT image, check the position of the condyle from the CBCT image, and directly set the coordinates of the center points of the left and right condyles; the third method is to use a face bow to obtain the spatial position of the maxillary tooth model and the orbitoauricular plane, and use the center points of the left and right ear balls of the face bow as the center points of the left and right condyles; the fourth method is to obtain the center points of the left and right condyles by a mandibular motion trajectory recorder.

[0021] Furthermore, the occlusal plane adjustment program module is specifically used to adjust the incisal end point and the left and right posterior end points of the occlusal plane, and the angle calculation program module is specifically used to calculate the angle between two planes, two lines or rotational movement, the angle of the line between two points, and the rotational movement angle calculation at a certain point position.

[0022] Further, the occlusal plane adjustment program module can calculate and measure the occlusal separation angle (DA) on the tooth model, which is the gap between the upper and lower teeth. Its value is expressed in degrees, and the minimum space between the teeth during the opening and closing movement is determined, so that there is no contact between the teeth, and their excessive separation is avoided. The minimum gap between the upper and lower teeth has good chewing efficiency, and the system consumes the least energy. When the mandible makes an extension movement, the condyle will slide forward and downward along the inclined surface of the posterior wall of the articular tubercle. The angle between the posterior inclined surface of the articular tubercle and the orbital auricular plane is called the sagittal condylar inclination (SCI). The angle between the occlusal plane and the orbital auricular plane is called the occlusal plane inclination (OPI), and the sagittal condylar inclination minus the occlusal plane inclination is the relative condylar inclination (RCI).

[0023] The calculation formula is: SCI-OPI=RCI RCI-CI=DA SCI-OPI-CI=DA OPI=SCI-CI-DA

[0024] Furthermore, when the occlusal separation angle is less than 8°, the posterior teeth are prone to occlusal interference. When the occlusal separation angle is greater than 10°, a large occlusal separation will be formed, which will lead to too low chewing efficiency. Therefore, the ideal value of the occlusal separation angle should be between 8° and 10°. Good chewing efficiency is also related to the cusp inclinati on (CI) of molars and premolars. The ideal value is 30°, but in some cases where the sagittal plane relative to the condylar inclination is small, 25° is also acceptable. The situation where the occlusal plane inclination is close to 0° or negative should be avoided, otherwise an unacceptable occlusal separation angle will occur.

[0025] Furthermore, the opening and closing mouth movement program module is specifically used to control the overall opening and closing mouth movement of the mandibular tooth model to simulate the clinical opening and closing mouth movement of the upper and lower jaws. The opening and closing mouth movement is the controlled movement of the mandibular tooth model around the condylar axis, the condylar axis translation, etc., and the rotation angle generated by any point on the mandibular tooth model around the line connecting the center points of the left and right condyles is calculated.

[0026] Furthermore, the automatic teeth arrangement program module is specifically used to automatically align all teeth, and automatically align all teeth after automatically calculating the dental arch line. The dental arch line adjustment program module is specifically used to adjust the dental arch line shape of the upper and lower jaw dental models and move the overall dental arch line forward and backward. When moving the overall dental arch line forward and backward, all teeth on the upper and lower jaws of the dental model are moved as a whole along the plane where the dental arch line is located.

[0027] Furthermore, the tooth movement program module is specifically used for moving and extracting teeth on the tooth model and rotating, translating, extending and depressing teeth in non-tooth extraction scenarios.

[0028] Furthermore, the collision detection program module is specifically used to detect the collision of all teeth in the upper and lower jaws, and display the collision position and collision overlap, add the matrix of the overall movement of the lower jaw, detect all teeth on the upper and lower jaw tooth models, and use depth maps and rendering grids to display the collision overlap.

[0029] Furthermore, the overlapping display program module is specifically used to display the teeth before and after the movement in different colors, so that the doctor can intuitively view the movement amount and the collision overlap amount to increase the rotation matrix of the jaw.

[0030] Furthermore, the movement output program module is specifically used to display and output the movement of the tooth in the three directions of the tooth long axis coordinate system XYZ. Each tooth on the tooth model establishes a coordinate system through the tooth long axis with the center of mass of the crown as the origin. No additional explanation is required, and the movement in the three directions of the coordinate system XYZ can be easily and accurately read.

[0031] In one embodiment, a method for arranging teeth based on an occlusal separation angle comprises the following steps:

[0032] Step 1: Registration of upper and lower jaw tooth models with X-ray images;

[0033] Step 2: Set the coordinates of the center points of the left and right condyles;

[0034] Step 3: Measure the relative condylar guide inclination and calculate the angle range of the ideal occlusal plane required to achieve the ideal occlusal separation angle;

[0035] Step 4: Set the vertical height of the incisor tip of the upper incisor on the occlusal plane and the anterior-posterior position of the upper incisor;

[0036] Step 5: Set the mandibular tooth model to open and close the mouth around the line connecting the center points of the left and right condyles until the upper and lower incisors reach normal overbite;

[0037] Step 6: Set the occlusal plane incisal point as the vertex to display the ideal occlusal plane angle range;

[0038] Step 7: Adjust the vertical height of the left and right posterior teeth endpoints of the occlusal plane so that the occlusal plane is located in the angle range of the ideal occlusal plane;

[0039] Step 8: Automatically arrange teeth and adjust the upper and lower teeth to the adjusted occlusal plane;

[0040] Step 9: Adjust the dental arch lines and tooth positions on the upper and lower jaw dental models to achieve cusp-fossa occlusal relationship.

[0041] Furthermore, step one and step two may be swapped, and step three may be performed in any step before step six.

[0042] The present invention provides a computer-readable storage medium storing instructions. When the instructions are executed on a computer, the computer executes the method described in one embodiment.

[0043] The present invention discloses a teeth arrangement system based on the occlusal separation angle, comprising: a registration program module, a left and right condylar center point setting program module, an occlusal plane adjustment program module, an angle calculation program module, an opening and closing mouth movement program module, an automatic teeth arrangement program module, a dental arch line adjustment program module, a tooth movement program module, a collision detection program module, an overlapping display program module, and a movement amount output program module. The present invention discloses a teeth arrangement method based on the occlusal separation angle of the condylar axis, which calculates a suitable occlusal plane angle with an ideal occlusal separation angle as a target, and makes the angle of the mandibular plane angle reach within a normal range, so as to assist doctors in formulating a better correction plan, make the correction result more stable, and achieve the best tooth occlusal function. 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 1 A schematic diagram of an angle calculated by an occlusal plane adjustment program module in a tooth arrangement system based on an occlusal separation angle;

[0046] Figure 2 A schematic diagram of a calculation formula related to an occlusal plane adjustment program module in a tooth arrangement system based on an occlusal separation angle;

[0047] Figure 3 A schematic diagram of registration of a registration program module in a tooth arrangement system based on occlusal separation angle;

[0048] Figure 4 A schematic diagram of setting the center points of the left and right condyles in a program module for setting the center points of the left and right condyles in a tooth arrangement system based on an occlusal separation angle;

[0049] Figure 5 A schematic diagram of setting the incisal end point of an occlusal plane tooth in an occlusal plane adjustment program module in a tooth arrangement system based on an occlusal separation angle;

[0050] Figure 6 A schematic diagram of an opening and closing movement program module in a tooth arrangement system based on an occlusal separation angle performing overall opening and closing movement;

[0051] Figure 7 A schematic diagram of an ideal occlusal plane angle range in an occlusal plane adjustment program module in a tooth arrangement system based on an occlusal separation angle;

[0052] Figure 8 A schematic diagram of a tooth movement program module of a tooth arrangement system based on occlusal separation angle for moving teeth;

[0053] Fig. 9 A flow chart of a tooth arrangement method based on occlusal separation angle.

[0054] On the figure: 11- counterclockwise rotation angle of mandible, 12- normal overbite and overjet, 13- collision amount of teeth, 14- incisal point of occlusal plane, 15- upper limit of ideal occlusal plane angle, 16- lower limit of ideal occlusal plane angle, 21- crown projection contour line, 31- vertical height, 32- anterior-posterior position, 41- rotation, translation, elongation and depression of teeth, A- sagittal condylar inclination, B- occlusal plane inclination, C- relative condylar inclination, a- center point of left condyle, b center point of right condyle. DETAILED DESCRIPTION

[0055] 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.

[0056] 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. indicate orientations or positional relationships based on the orientations 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 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.

[0057] 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.

[0058] Exemplarily, a tooth arrangement system based on occlusal separation angle includes: a tooth arrangement system based on occlusal separation angle includes: a registration program module, a left and right condylar center point setting program module, an occlusal plane adjustment program module, an angle calculation program module, an opening and closing mouth movement program module, an automatic tooth arrangement program module, a dental arch line adjustment program module, a tooth movement program module, a collision detection program module, an overlapping display program module, and a movement amount output program module.

[0059] like Figure 1As shown in the figure, the occlusal plane adjustment program module in a tooth arrangement system based on the occlusal separation angle can calculate and measure the occlusal separation angle (DA) on the tooth model. It is the gap between the upper and lower teeth. Its value is expressed in degrees. It determines the minimum space between the teeth during the opening and closing movement, so that there is no contact between the teeth and avoids their excessive separation. The minimum gap between the upper and lower teeth has good chewing efficiency and the system consumes the least energy. When the mandible makes an extension movement, the condyle will slide forward and downward along the inclined surface of the posterior wall of the articular tubercle. The angle between the posterior inclined surface of the articular tubercle and the orbitoauricular plane is called the sagittal condylar inclination A (SCI). The angle between the occlusal plane and the orbitoauricular plane is called the occlusal plane inclination B (OPI). The sagittal condylar inclination minus the occlusal plane inclination is the relative condylar inclination C (RCI).

[0060] like Figure 2 As shown, the calculation formula is: SCI-OPI=RCI RCI-CI=DA SCI-OPI-CI=DA OPI=SCI-CI-DA

[0061] The range of CI is 25°∽30°, and the range of DA is 8°∽10°. Under ideal conditions:

[0062] OPI maximum value = SCI-CI-DA = 45°-25°-8° = 12°

[0063] OPI minimum value = SCI-CI-DA = 45°-30°-10° = 5°

[0064] Permanent teeth without wear OPI = SCI-CI-DA = 45°-30°-8° = 7°

[0065] Permanent teeth are worn OPI = SCI-CI-DA = 45°-25°-10° = 10°

[0066] The most ideal occlusal separation angle is 9°, at which point the OPI ranges from 5° to 11°.

[0067] OPI minimum value = SCI-CI-DA = 45°-30°-9° = 5°

[0068] OPI maximum value = SCI-CI-DA = 45°-25°-9° = 11°

[0069] Furthermore, when the occlusal separation angle is less than 8°, the posterior teeth are prone to occlusal interference. When the occlusal separation angle is greater than 10°, a large occlusal separation will be formed, which will lead to too low chewing efficiency. Therefore, the ideal value of the occlusal separation angle should be between 8° and 10°. Good chewing efficiency is also related to the cusp inclinati on (CI) of molars and premolars. The ideal value is 30°, but in some cases where the sagittal plane relative to the condylar inclination is small, 25° is also acceptable. The situation where the occlusal plane inclination is close to 0° or negative should be avoided, otherwise an unacceptable occlusal separation angle will occur.

[0070] A mouth opening and closing motion program module in a tooth arrangement system based on occlusal separation angle is specifically used to control the overall mouth opening and closing motion of the mandibular tooth model to simulate the clinical mouth opening and closing motion of the upper and lower jaws. The mouth opening and closing motion is the controlled motion of the mandibular tooth model rotating around the condylar axis, the condylar axis translating, etc., and the rotation angle generated by any point on the mandibular tooth model around the line connecting the center points of the left and right condyles is calculated.

[0071] An automatic teeth arrangement program module in a teeth arrangement system based on occlusal separation angle is specifically used to automatically align all teeth, and the dental arch line adjustment program module is specifically used to adjust the dental arch line shape of the upper and lower jaw dental models and move the overall dental arch line forward and backward position. When the overall dental arch line is moved forward and backward, all teeth on the dental model are translated as a whole along the plane where the dental arch line is located.

[0072] like Figure 8 As shown, a tooth movement program module in a tooth arrangement system based on occlusal separation angle is specifically used for moving and extracting teeth on a tooth model and rotating, translating, extending and depressing teeth in a non-extraction scenario 41.

[0073] A collision detection program module in a tooth arrangement system based on occlusal separation angle is specifically used to detect the collision of all teeth in the upper and lower jaws, and display the collision position and collision overlap, add a matrix of the overall movement of the lower jaw, detect all teeth on the upper and lower jaw tooth models, and use depth maps and rendering grids to display the collision overlap.

[0074] An overlapping display program module in a tooth arrangement system based on occlusal separation angle is specifically used to display teeth before and after movement in different colors, so that doctors can intuitively view the movement amount, collision overlap amount, and increase the rotation matrix of the jaw.

[0075] A movement output program module in a tooth arrangement system based on occlusal separation angle is specifically used to display and output the movement of teeth in the three directions of the tooth long axis coordinate system XYZ. Each tooth on the tooth model is connected through the tooth long axis and the center of mass of the crown is used as the origin to establish a coordinate system. No additional explanation is required, and the movement in the three directions of the coordinate system XYZ can be easily and accurately read.

[0076] like Fig. 9 As shown in Figure 1, a method of tooth arrangement based on occlusal separation angle is

[0077] Embodiment 1 comprises the following steps:

[0078] Step 1: If Figure 3 As shown, the registration program module performs registration of the upper and lower jaw tooth models with the X-ray image, and after registration, a crown projection contour line 21 appears;

[0079] Step 2: If Figure 4 As shown, the left and right condyle center point setting program module sets the coordinates of the left and right condyle center points a and b;

[0080] Step 3: The angle calculation program module measures the relative condylar guide inclination and calculates the angle range of the ideal occlusal plane required to achieve the ideal occlusal separation angle;

[0081] Step 4: If Figure 5 As shown, the occlusal plane adjustment program module sets the vertical height 31 of the incisor tip of the upper incisor and the anterior-posterior position 32 of the upper incisor on the occlusal plane;

[0082] Step 5: If Figure 6 and 7 As shown, the opening and closing mouth movement program module sets the mandibular tooth model as a whole to rotate counterclockwise around the line connecting the center points a and b of the left and right condyles to perform the opening and closing mouth movement, and displays the mandibular counterclockwise rotation angle 11 until the upper and lower incisors reach a normal overbite 12, and the collision detection program module detects the collision amount of the teeth on the mandibular and maxillary tooth models 13 and displays it;

[0083] Step 6: If Figure 6 and 7 As shown, the occlusal plane adjustment program module sets the occlusal plane incisal point 14 as the vertex, and the angle calculation program module displays the ideal occlusal plane angle range, and the ideal occlusal plane angle range includes an ideal occlusal plane angle upper limit value 15 and an ideal occlusal plane angle lower limit value 16;

[0084] Step 7: The occlusal plane adjustment program module adjusts the vertical height of the left and right posterior teeth endpoints of the occlusal plane so that the occlusal plane is located in the ideal occlusal plane angle range according to the calculation formula: SCI-OPI = RCI RCI-CI = DASCI-OPI-CI = DAOPI = SCI-CI-DA

[0085] The most ideal occlusal separation angle is 9°, at which point the OPI ranges from 5° to 11°.

[0086] OPI minimum value = SCI-CI-DA = 45°-30°-9° = 5°

[0087] OPI maximum value = SCI-CI-DA = 45°-25°-9° = 11°;

[0088] Step 8: The automatic teeth arrangement program module automatically arranges the teeth and adjusts the upper and lower teeth to the adjusted occlusal plane;

[0089] Step 9: If Figure 8 As shown, the dental arch line adjustment program module and the tooth movement program module adjust the dental arch lines and the positions of the teeth on the upper and lower jaw tooth models to achieve a cusp-fossa occlusal relationship.

[0090] Furthermore, in step four, the vertical height of the incisor point of the maxillary occlusal plane is determined according to the amount of exposure of the incisor tip of the upper incisor when smiling, and the entire dental arch line is dragged in the front-to-back direction to adjust the front-to-back position of the maxillary incisor. The occlusal plane is a plane passing through the incisor point of the upper incisor and the last tooth cusp in the maxilla that can establish occlusion. The maxillary dental arch line can also be used to replace the maxillary occlusal plane. The dental arch line is placed on the occlusal plane. Moving the dental arch line as a whole can translate all the teeth, which is convenient for quick adjustment.

[0091] like Figure 4 As shown, in the step five, the mandibular tooth model as a whole performs opening and closing movements around the line connecting the center points of the left and right condyles. The opening and closing movements can be performed by manual dragging and moving, or the closing movement can be performed automatically. The mandible follows the mandibular tooth model to perform opening and closing movements around the line connecting the center points a and b of the left and right condyles. The angle between the mandibular plane and the orbitoauricular plane after rotation is measured. Any point e on the mandibular tooth model is selected, and a perpendicular line is drawn to the line connecting the center points of the left and right condyles to obtain the perpendicular foot f. The angle o of e rotating around f is measured and displayed, which is the rotation angle of the mandibular tooth model.

[0092] Furthermore, in step seven, the left and right posterior teeth endpoints of the maxillary occlusal plane are lowered or raised according to the cephalometric values. If the high-angle occlusal plane is steep and needs to be flattened, the lower posterior teeth endpoints are lowered so that the plane formed by the left and right sides is parallel to the pupil line.

[0093] Furthermore, in step eight, the teeth on the dental model can be moved by manual dragging or automatically, and the remaining teeth can be automatically extended along the long axis coordinate system of the teeth until the upper and lower teeth are in contact, or the upper and lower teeth can be moved in the direction perpendicular to the occlusal plane until contact is made.

[0094] Example 2

[0095] The parts not described in this embodiment are as in embodiment 1. This embodiment also provides a computer-readable storage medium storing instructions. When the instructions are executed on a computer, the computer executes the method of tooth arrangement based on the condylar axis occlusal separation angle.

[0096] The present invention discloses a teeth arrangement system based on the occlusal separation angle, comprising: a registration program module, a left and right condylar center point setting program module, an occlusal plane adjustment program module, an angle calculation program module, an opening and closing mouth movement program module, an automatic teeth arrangement program module, a dental arch line adjustment program module, a tooth movement program module, a collision detection program module, an overlapping display program module, and a movement amount output program module. The present invention discloses a teeth arrangement method based on the occlusal separation angle of the condylar axis, which calculates a suitable occlusal plane angle with an ideal occlusal separation angle as a target, and makes the angle of the mandibular plane angle reach within a normal range, so as to assist doctors in formulating a better correction plan, make the correction result more stable, and achieve the best tooth occlusal function.

[0097] 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.

[0098] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This narrative method 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 can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A tooth arrangement system based on occlusal separation angle, characterized in that: include: Registration program module, used for registration of upper and lower jaw tooth models with X-ray images; The left and right condyle center point setting program module is used to set the coordinates of the left and right condyle center points; 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; The opening and closing mouth movement program module is used to control the overall opening and closing mouth movement of the mandibular tooth model; Automatic teeth arrangement program module, used to automatically align all teeth; Dental arch line adjustment program module, used to adjust the dental arch line shape of the upper and lower jaw tooth models and move the overall dental arch line forward and backward position; A tooth movement program module for moving and extracting teeth on a dental model; A collision detection program module is used to detect the collision overlap amount of the upper and lower jaw tooth models; Overlap display program module, used to display the changes of dental arch and tooth position before and after movement; The movement output program module is used to display and output the movement of teeth.

2. A tooth arrangement system based on occlusal separation angle according to claim 1, characterized in that: The registration program module is specifically used for registration of upper and lower jaw tooth models with X-ray images.

3. A tooth arrangement system based on occlusal separation angle as claimed in claim 1, characterized in that: The left and right condylar center point setting 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 and mandibular movement trajectory recorder.

4. A tooth arrangement system based on occlusal separation angle as claimed in claim 1, characterized in that: The occlusal plane adjustment program module is specifically used to adjust the incisal end point and the left and right posterior end points of the occlusal plane, and the angle calculation program module is specifically used to calculate the angle between two planes, two lines or rotational motion.

5. The tooth arrangement system based on occlusal separation angle according to claim 1, characterized in that: The opening and closing mouth movement module is specifically used to control the overall opening and closing mouth movement of the mandibular tooth model, and calculate the rotation angle generated by any point on the mandibular tooth model around the line connecting the center points of the left and right condyles.

6. The tooth arrangement system based on occlusal separation angle according to claim 1, characterized in that: The automatic teeth arrangement program module is specifically used to automatically align all teeth, the dental arch line adjustment program module is specifically used to adjust the dental arch line shape of the upper and lower jaw dental models and move the overall dental arch line forward and backward position, and the tooth movement program module is specifically used to move and remove teeth on the dental model.

7. The tooth arrangement system based on occlusal separation angle according to claim 1, characterized in that: The collision detection program module is specifically used to detect the collision of all teeth in the upper and lower jaws, and display the collision position and the collision overlap. The overlap display program module is specifically used to display the teeth before and after movement in different colors. The movement output program module is specifically used to display and output the movement of the teeth in the three directions of the tooth long axis coordinate system XYZ.

8. A method for arranging teeth based on occlusal separation angle, characterized in that: The following steps are involved: Step 1: Registration of upper and lower jaw tooth models with X-ray images; Step 2: Set the coordinates of the center points of the left and right condyles; Step 3: Measure the relative condylar guide inclination and calculate the angle range of the ideal occlusal plane required to achieve the ideal occlusal separation angle; Step 4: Set the vertical height of the incisor tip of the upper incisor on the occlusal plane and the anterior-posterior position of the upper incisor; Step 5: Set the mandibular tooth model to open and close the mouth around the line connecting the center points of the left and right condyles until the upper and lower incisors reach normal overbite; Step 6: Set the occlusal plane incisal point as the vertex to display the angle range of the ideal occlusal plane; Step 7: Adjust the vertical height of the left and right posterior teeth endpoints of the occlusal plane so that the occlusal plane is located in the angle range of the ideal occlusal plane; Step 8: Automatically arrange teeth and adjust the upper and lower teeth to the adjusted occlusal plane; Step 9: Adjust the dental arch lines and tooth positions on the upper and lower jaw dental models to achieve cusp-fossa occlusal relationship.

9. The method for arranging teeth based on occlusal separation angle according to claim 8, characterized in that: The steps 1 and 2 can be swapped, and step 3 can be performed in any step before step 6.

10. 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 claims 8 and 9 is implemented.

Images