Tooth arrangement system and method for eliminating early contact

Abstract

The invention discloses a tooth arrangement system for eliminating early contact. The tooth arrangement system comprises a left and right condylar process central point setting program module, a collision detection program module, an opening and closing stopping program module, a tooth movement program module, an overlapping display program module and a movement amount display program module, a tooth arrangement method for eliminating early contact comprises the following steps: analyzing the early contact positions of upper and lower jaw teeth and the amount of movement required for eliminating the early contact teeth, judging whether treatment can be carried out through jaw adjustment, correction or orthognathic surgery, visually checking the position of a middle early contact point, and removing the early contact after left and right movement or tooth lowering. The automatic closing collision motion simplifies the operation of a doctor and assists the doctor in quickly formulating a method for eliminating early contact.

Description

Technical Field

[0001] The present invention relates to the field of dentistry, and in particular to a tooth arrangement system and method for eliminating premature contact. Background Art

[0002] Early contact is defined as the mandibular opening from a small mouth opening in the central relation position until it comes into light contact with the maxillary teeth. If only a few teeth are in contact during light contact, and it is not a stable intercusp contact, the teeth in contact are called early contact. Then, only by shifting the mandibular position can the intercusp contact with extensive contact be achieved, also called heavy bite. Early contact is an important cause of temporomandibular joint disorder. Clinical treatment measures include jaw adjustment, orthodontics, orthognathic surgery, etc.

[0003] If the amount of premature contact is small and the position of premature contact is within the inner 1 / 3 of the functional bevel of the cusp, the jaw adjustment method can be used to deal with it, that is, the early contact point is ground off with a drill to adjust the cusp. However, this method causes irreversible damage, and if one tooth is ground, other teeth may have premature contact. Therefore, it is difficult to analyze clinically. In the past, plaster models were installed on the jaw frame. Grinding the teeth with premature contact points one by one on the jaw frame is a time-consuming and labor-intensive method, and it is not easy to evaluate the amount of grinding. If it is necessary to analyze and find that the grinding cannot eliminate all premature contact points, an orthodontic analysis is required. The plaster model after grinding is damaged, which affects the subsequent analysis.

[0004] The amount of tooth movement required for orthodontic depression cannot be analyzed by using a plaster model maxillary frame, and it is also impossible to move the teeth left and right. Therefore, a convenient and repeatable tooth arrangement system and method is needed to develop an auxiliary analysis method to eliminate early contact. Summary of the invention

[0005] The purpose of the present invention is to analyze the premature contact position of the upper and lower teeth and the amount of movement required to eliminate premature contact teeth, determine whether treatment can be performed through jaw adjustment, correction or orthognathic surgery, visualize the position of the central premature contact point, and after moving the teeth left and right or pressing them down, the automatic closing and collision movement simplifies the doctor's operation and assists the doctor in quickly formulating a method to eliminate premature contact. The present invention provides a tooth arrangement system and method for eliminating premature contact.

[0006] A tooth arrangement system for eliminating premature contact, comprising:

[0007] The left and right condyle center point setting program module is used to set the coordinates of the left and right condyle centers;

[0008] A collision detection program module is used to detect the collision amount of the upper and lower jaw tooth models;

[0009] The opening and closing stop program module is used to set the minimum collision amount of the upper and lower jaw tooth models, and automatically stop the overall opening and closing movement of the lower jaw tooth model when the collision amount is reached;

[0010] A tooth movement program module, used for moving teeth on the tooth model;

[0011] Overlap display program module, used to display the tooth model before and after the movement;

[0012] The movement amount display program module is used to display the movement amount of teeth on the tooth model.

[0013] Furthermore, the left and right condylar center point setting program module is specifically used to determine the coordinates of the left and right condylar center points through X-ray cephalographic images, CBCT images, virtual face bows or mandibular motion trajectory recorders.

[0014] Furthermore, there are three clinical methods for obtaining the center points of the left and right condyles. The first method is to overlap the upper and lower tooth models with the X-ray cephalogram, obtain the approximate position of the condyle center through the condyle image on the X-ray cephalogram, and set the distance between the left and right condyle center points using the mean method. The second method is to overlap the upper and lower tooth models with the CBCT image, check the approximate position of the condyle from the CBCT image, and directly set the coordinates of the left and right condyle center points. The third method is to use a face bow to obtain the spatial position of the maxillary tooth model, the skull, and the external auditory canal, 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.

[0015] Furthermore, the collision detection program module is specifically used to detect the collision area of ​​the upper and lower jaw tooth models and display the collision amount.

[0016] Furthermore, all teeth on the upper and lower jaw tooth models are detected. Since the models are usually mesh models in stl format, depth maps or rendered meshes are usually used to display the collision amount.

[0017] Furthermore, the opening and closing stop program module is specifically used to set the minimum collision amount of the upper and lower teeth, and when the collision amount is reached, the opening and closing movement of the mandibular tooth model is stopped.

[0018] Furthermore, after the teeth in early contact are moved, there is no early contact between the upper and lower tooth models. At this time, the lower jaw tooth model needs to be closed as a whole until contact is made, and then the new early contact point can be viewed. When the lower jaw tooth model is manually dragged to close the mouth, it is easy to cause excessive movement, that is, exceeding the amount of early contact. The opening and closing stop program module can reach the set minimum collision amount of the upper and lower jaw teeth, which greatly reduces manual operation, saves time, and is more accurate.

[0019] Furthermore, the tooth movement program module is specifically used to move the upper and lower jaw tooth models to eliminate premature contact between the upper and lower jaw tooth models by performing operations such as depressing, translating and rotating the teeth on the tooth models to eliminate premature contact.

[0020] Furthermore, the overlapping display program module is specifically used to display the tooth model before and after the movement, and is displayed in different colors to facilitate the doctor to intuitively view the movement amount.

[0021] Furthermore, the movement display program module is specifically used to display the movement amount of the tooth model in the three directions of the tooth long axis coordinate system XYZ.

[0022] Furthermore, each tooth on the upper and lower jaws has a long axis, and the coordinate system established with the center of mass of the crown as the origin is commonly used by doctors. No additional instructions are required, and doctors can easily and accurately read the specific values ​​of the movement.

[0023] In one embodiment, a method for arranging teeth to eliminate premature contact is characterized by comprising the following steps:

[0024] Step 1: Set the coordinates of the center points of the left and right condyles;

[0025] Step 2: The mandibular tooth model as a whole performs closing movement around the line connecting the center points of the left and right condyles;

[0026] Step 3: Detect the collision amount between the mandibular tooth model and the maxillary tooth model, and when the minimum collision amount set by the opening and closing stop program module is reached, stop the opening and closing movement of the mandibular tooth model;

[0027] Step 4: Move the teeth on the maxillary or mandibular tooth model that cause the collision so that they no longer collide;

[0028] Step 5: Repeat steps 2 to 4 until at least one tooth in the posterior area of ​​the upper and lower jaw tooth models on the left and right sides is in contact, and at least one tooth in the anterior area of ​​the upper and lower jaw tooth models is in contact;

[0029] Step 6: Move the remaining teeth of the upper and lower jaw tooth models until they are all in contact;

[0030] Step 7: Overlap the teeth on the tooth model before and after the movement to show the amount of tooth movement.

[0031] Furthermore, in step 1, the coordinates of the center points of the left and right condyles are set, which can be set by CT or by X-ray lateral skull film.

[0032] Furthermore, in step 2, the mandibular tooth model as a whole performs a mouth-closing movement around the line connecting the center points of the left and right condyles. The mandibular tooth model may perform the mouth-closing movement manually or automatically by the system.

[0033] Furthermore, in step 4, the maxillary or mandibular tooth model that caused the collision is moved so that the collision no longer occurs.

[0034] Furthermore, in step five, at least one tooth in the posterior area of ​​the upper and lower jaw tooth models on the left and right sides is in contact, and at least one tooth in the anterior area of ​​the upper and lower jaw tooth models is in contact. The anterior area is in light contact, that is, when the posterior teeth are in full contact, there is a gap of 0.01-0.1mm in the anterior area.

[0035] The present invention discloses a tooth arrangement system for eliminating premature contact, comprising: a left and right condylar center point setting program module, a collision detection program module, an opening and closing stop program module, a tooth movement program module, an overlapping display program module and a movement amount display program module. A tooth arrangement method for eliminating premature contact is to analyze the premature contact position of the upper and lower jaw teeth and the amount of movement required to eliminate the premature contact teeth, determine whether treatment can be performed through jaw adjustment, correction or orthognathic surgery, visualize the position of the central premature contact point, and after moving the teeth left and right or pressing down, the automatic closing and collision movement simplifies the doctor's operation and assists the doctor in quickly formulating a method for eliminating premature contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A schematic diagram of a program module for setting the center points of left and right condyles in a tooth arrangement system for eliminating premature contact;

[0038] Figure 2 A schematic diagram of the connection between the center points of the left and right condyles in a tooth arrangement system that eliminates premature contact;

[0039] Figure 3 A schematic diagram of a tooth arrangement system for eliminating premature contact, in which the left canine produces premature contact and the other teeth have no contact;

[0040] Figure 4 A schematic diagram of a tooth movement program module in a tooth arrangement system for eliminating premature contact;

[0041] Figure 5A schematic diagram of a collision detection program module in a tooth arrangement system for eliminating premature contact;

[0042] Figure 6 A schematic diagram of an opening and closing stop program module in a tooth arrangement system for eliminating premature contact;

[0043] Figure 7 A flow chart of a method of tooth arrangement to eliminate premature contacts.

[0044] Main components: 20-early contact point, 30-depression, translation and rotation of teeth DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] A tooth arrangement system for eliminating premature contact comprises: a left and right condylar center point setting program module, a collision detection program module, an opening and closing stop program module, a tooth movement program module, an overlap display program module and a movement amount display program module.

[0049] Exemplarily, the left and right condyle center point setting program module is used to set the coordinates of the left and right condyle centers, specifically to determine the coordinates of the left and right condyle centers through X-ray cephalographic images, CBCT images, virtual face bows or mandibular motion trajectory recorders.

[0050] Exemplarily, the collision detection program module is specifically used to detect the collision area of ​​the upper and lower jaw tooth models and display the collision amount.

[0051] Exemplarily, the opening and closing stop program module is specifically used to set the minimum collision amount of the upper and lower teeth, and when the collision amount is reached, the opening and closing movement of the mandibular tooth model is stopped.

[0052] Exemplarily, the tooth movement program module is specifically used to move the upper and lower jaw tooth models to eliminate premature contact between the upper and lower jaw tooth models.

[0053] Exemplarily, the overlapping display program module is specifically used to display the tooth model before and after the movement, using different colors.

[0054] Exemplarily, the movement display program module is specifically used to display the movement amount of the tooth model in the three directions of the tooth long axis coordinate system XYZ.

[0055] See also Figure 7 , a method for arranging teeth to eliminate premature contact, characterized in that it comprises the following steps:

[0056] Step 1: Please refer to Figure 1 and 2 , enter the left and right condylar center point setting program module, and set the coordinates of the left and right condylar center points a and b through the X-ray cephalogram;

[0057] Step 2: Please refer to Figure 3 , enter the collision detection program module, the mandibular tooth model as a whole performs closing movement around the line connecting the center points a and b of the left and right condyles, and detects that the left maxillary canine produces early contact 20, and the other teeth have no contact, and the collision amount is displayed;

[0058] Step 3: Please refer to Figure 5 , enter the opening and closing stop program module, detect the canine collision amount between the mandibular tooth model and the maxillary tooth model, and stop the opening and closing movement of the mandibular tooth model when the minimum collision amount set by the opening and closing stop program module is reached;

[0059] Step 4: Please refer to Figure 4 , enter the tooth movement program module, and depress, translate and rotate the maxillary canine or mandibular canine on the tooth model 30 until the upper and lower jaws of the tooth model are out of contact;

[0060] Step 5: Repeat steps 2 to 4 until at least one tooth in the posterior area of ​​the upper and lower jaw models on the left and right sides is in contact, and at least one tooth in the anterior area of ​​the upper and lower jaw models is in contact. The anterior area is in light contact, that is, when the posterior teeth are in full contact, there is a gap of 0.01-0.1mm in the anterior area.

[0061] Step 6: Please refer to Figure 6 , enter the overlapping display program module, and move the remaining teeth of the upper and lower jaw tooth models until all of them are in contact;

[0062] Step 7: Enter the movement amount display program module, overlap and display the teeth on the tooth model before and after the movement, and display the movement amount of the teeth.

[0063] The present invention discloses a tooth arrangement system for eliminating premature contact, comprising: a left and right condylar center point setting program module, a collision detection program module, an opening and closing stop program module, a tooth movement program module, an overlapping display program module and a movement amount display program module. A tooth arrangement method for eliminating premature contact is to analyze the premature contact position of the upper and lower jaw teeth and the amount of movement required to eliminate the premature contact teeth, determine whether treatment can be performed through jaw adjustment, correction or orthognathic surgery, visualize the position of the central premature contact point, and after moving the teeth left and right or pressing down, the automatic closing and collision movement simplifies the doctor's operation and assists the doctor in quickly formulating a method for eliminating premature contact.

[0064] 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.

[0065] 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 tooth arrangement system for eliminating premature contact, 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 centers; A collision detection program module is used to detect the collision amount of the upper and lower jaw tooth models; The opening and closing stop program module is used to set the minimum collision amount of the upper and lower jaw tooth models, and stop the overall opening and closing movement of the lower jaw tooth model when the collision amount is reached; A tooth movement program module, used for moving teeth on the tooth model; Overlap display program module, used to display the tooth model before and after the movement; The movement amount display program module is used to display the movement amount of teeth on the tooth model.

2. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The left and right condylar center point setting program module is specifically used to determine the coordinates of the left and right condylar center points through X-ray cephalographic images, CBCT images, virtual face bows or mandibular motion trajectory recorders.

3. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The collision detection program module is specifically used to detect the collision area of ​​the upper and lower jaw tooth models and display the collision amount.

4. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The opening and closing stop program module is specifically used to set the minimum collision amount of the upper and lower teeth. When the collision amount is reached, the opening and closing movement of the lower jaw tooth model is stopped.

5. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The tooth movement program module is specifically used to move the upper and lower jaw tooth models to eliminate premature contact between the upper and lower jaw tooth models.

6. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The overlapping display program module is specifically used to display the tooth model before and after the movement, using different colors.

7. A tooth arrangement system for eliminating premature contact as claimed in claim 1, characterized in that: The movement display program module is specifically used to display the movement amount of the tooth model in the three directions of the tooth long axis coordinate system XYZ.

8. A method for arranging teeth to eliminate premature contact, 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: The mandibular tooth model as a whole performs closing movement around the line connecting the center points of the left and right condyles; Step 3: Detect the collision amount between the mandibular tooth model and the maxillary tooth model, and when the minimum collision amount set by the opening and closing stop program module is reached, stop the opening and closing movement of the mandibular tooth model; Step 4: Move the teeth on the maxillary or mandibular tooth model that cause the collision so that they no longer collide; Step 5: Repeat steps 2 to 4 until at least one tooth in the posterior area of ​​the upper and lower jaw tooth models on the left and right sides is in contact, and at least one tooth in the anterior area of ​​the upper and lower jaw tooth models is in contact; Step 6: Move the remaining teeth of the upper and lower jaw tooth models until they are all in contact; Step 7: Overlap the teeth on the tooth model before and after the movement to show the amount of tooth movement.

9. 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 8 is implemented.

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