CN115983073A - Optimal design method of invisible tooth appliance - Google Patents
Optimal design method of invisible tooth appliance Download PDFInfo
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- CN115983073A CN115983073A CN202310030801.1A CN202310030801A CN115983073A CN 115983073 A CN115983073 A CN 115983073A CN 202310030801 A CN202310030801 A CN 202310030801A CN 115983073 A CN115983073 A CN 115983073A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The invention discloses an optimal design method of an invisible tooth appliance, which comprises the steps of constructing a three-dimensional digital model of the invisible tooth appliance, adjusting a local appliance model and carrying out constraint improvement on deformation of the local appliance model, namely completing the establishment of the three-dimensional digital model of the invisible tooth appliance. Compared with the prior art, the invention has the advantages that: provides an optimal design method of the invisible tooth appliance which can accurately control the acting area, direction and size of the correcting force and the balancing force.
Description
Technical Field
The invention relates to the technical field of invisible tooth appliances, in particular to an optimal design method of an invisible tooth appliance.
Background
The main means for correcting malocclusion is to apply proper correction force to malocclusion teeth to move the malocclusion teeth to the correct position and reestablish a coordinated, healthy and stable jaw relationship, so that the forced movement of the teeth is the basic step of orthodontic treatment. Compared with the traditional fixed orthodontic technology, the bracket-free invisible orthodontic technology does not rely on the deformation of an arch wire, a spring or a rubber ring to generate orthodontic force, but continuously applies the orthodontic force generated by the elastic deformation of the orthodontic device material to the teeth to be moved, thereby achieving the aim of orthodontic treatment.
The application of the corrective force needs to take into account the following three aspects: first, the corrective forces generated by elastic deformation may act not only on the teeth to be moved, but also on certain teeth to be immobilized if not properly controlled, thereby causing undesirable tooth movement; secondly, the size, direction and action position of the correcting force directly influence the correcting effect; thirdly, the forces acting on the appliance in reaction must be balanced, and incorrect correction can be generated due to the improper action area of the balanced force, so that the accurate control of the action area, direction and size of the correction force and the balanced force is one of the key technologies of invisible correction.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the technical defects and provides an optimal design method of an invisible tooth appliance.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: an optimal design method of an invisible tooth appliance comprises the steps of constructing a three-dimensional digital model of the invisible tooth appliance, adjusting a local appliance model and carrying out constraint improvement on deformation of the local appliance model, namely, the establishment of the three-dimensional digital model of the invisible tooth appliance is completed, and specifically comprises the following steps:
step 1: carrying out three-dimensional modeling on teeth of a patient, establishing a three-dimensional digital model of a jaw based on reverse engineering, and constructing a bracket-free invisible appliance model;
and 2, step: adjusting the invisible appliance model, and determining the optimal positions of the lip side and the tongue side of the ideal dental model;
and 3, step 3: connecting the orthodontic appliance crowns in each stage in the design of the invisible orthodontic appliance model into a whole, and outputting three-dimensional model data;
and 4, step 4: performing three-dimensional finite element simulation and topology optimization on the redesigned appliance model to obtain three-dimensional model data of the redesigned appliance model;
and 5: and (3) modifying the optimized three-dimensional model of the appliance, and if the modified three-dimensional model still does not meet the use requirement, returning to the step 3, and if the modified three-dimensional model meets the requirement, processing and manufacturing the appliance according to the modified tooth model.
As an improvement, the step 1 of modeling the tooth model of the patient comprises the step of designing an appliance model in multiple stages by using a computer according to clinical data, an orthodontic target and the like of the orthodontic patient.
As an improvement, the optimization of the invisible appliance model in step 2 needs to consider a method of applying load to teeth by a tooth moving mode and a moving mode in an abnormal tooth correction process, and select a proper orthodontic force.
As an improvement, the finite element analysis result in the step 4 includes the stress distribution of the tooth body-periodontal ligament-alveolar bone of all teeth and the stress condition of the appliance itself in the bracket-free invisible orthodontic loading mode, the appliance to be orthodontic in the invisible orthodontic loading mode is subjected to non-uniform stress, the deformation of the appliance to be orthodontic in the tooth position is large, the stress concentration occurs, the teeth are influenced by the orthodontic force, and the stress level of the anchorage tooth is close to that of the orthodontic tooth.
As an improvement, the clinical data at least comprise clinical imaging data, dentition digital model and occlusal surface picture data.
Compared with the prior art, the invention has the advantages that: the design method for optimizing the invisible tooth appliance is reasonable in design, a finite element software is utilized to simulate the tooth moving process to indirectly model, a continuous invisible appliance model which accords with the actual appearance is established, accurate optimization assembly is carried out on the invisible appliance model and the labial side and the lingual side of the dental jaw model, the wearing comfort can be effectively improved when the invisible appliance model is used, and the simulation authenticity of the invisible appliance model is guaranteed.
Detailed Description
The present invention is described in further detail below.
An optimal design method of an invisible tooth appliance comprises the steps of constructing a three-dimensional digital model of the invisible tooth appliance, adjusting a local appliance model and carrying out constraint improvement on deformation of the local appliance model, namely, the establishment of the three-dimensional digital model of the invisible tooth appliance is completed, and specifically comprises the following steps:
step 1: carrying out three-dimensional modeling on teeth of a patient, establishing a three-dimensional digital model of a jaw based on reverse engineering, and constructing a bracket-free invisible appliance model;
step 2: adjusting the invisible appliance model, and determining the optimal positions of the lip side and the tongue side of the ideal dental model;
and step 3: connecting the orthodontic device crowns in each stage in the design of the invisible orthodontic device model into a whole, and outputting three-dimensional model data;
and 4, step 4: performing three-dimensional finite element simulation and topology optimization on the redesigned appliance model to obtain three-dimensional model data of the redesigned appliance model;
and 5: and (3) modifying the optimized three-dimensional model of the appliance, and if the modified three-dimensional model still does not meet the use requirement, returning to the step 3, and if the modified three-dimensional model meets the requirement, processing and manufacturing the appliance according to the modified tooth model.
The step 1 of modeling the tooth model of the patient comprises designing the appliance models in multiple stages by adopting a computer according to clinical data and correction targets of the corrected patient, and adjusting conveniently according to different time conditions through the appliance models in the multiple stages.
In the step 2, the invisible appliance model is optimized by considering a method of applying load to teeth by a tooth moving mode and a moving mode in the deformed tooth correcting process, a proper orthodontic force is selected, in the invisible correcting process, the invisible correcting device applies a continuous correcting force on a stress center of a contact surface between the inner surface of the correcting device and a dental crown, meanwhile, the teeth are subjected to the action of impedance force of periodontal tissues at the impedance center, the action of the stress of the corrected teeth generates mechanical movement according to the resultant force stressed in the tooth correcting process according to the Newton second law, the resultant force is controlled to be within the tooth moving force threshold range, and the optimal comfort degree of the orthodontic patient in the process is maintained.
The finite element analysis result in the step 4 comprises stress distribution of all teeth, namely periodontal ligament and alveolar bone, and stress conditions of the appliance in a bracket-free invisible orthodontic loading mode, the appliance to be orthodontic under the invisible orthodontic appliance loading mode is subjected to non-uniform stress, the deformation of the appliance to be orthodontic tooth position is large, stress concentration occurs, the teeth are influenced by orthodontic force, the anchorage tooth stress level is close to the orthodontic teeth, the finite element software is utilized to simulate the tooth moving process to carry out indirect modeling, a continuous invisible appliance model conforming to the actual appearance is established, and the simulation authenticity of the invisible appliance model is ensured.
Clinical data includes clinical imaging data, dentition digital model and occlusal surface photo data at least, thereby correct the design of ware model more accurate with the direction, mode and the size information that each tooth of step removed in the step is corrected in order obtaining to extract tooth with the patient's clinical data input computer of correcting tooth.
The invention and its embodiments have been described above, without this being limitative. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. An optimal design method of an invisible tooth appliance is characterized by comprising the following steps: the method comprises the steps of constructing a three-dimensional digital model of the invisible orthodontic appliance, adjusting a local orthodontic appliance model, and carrying out constraint improvement on deformation of the local orthodontic appliance model, namely completing the establishment of the three-dimensional digital model of the invisible dental appliance.
2. The optimal design method of the invisible dental appliance of claim 1, which is characterized in that: the method comprises the following steps:
step 1: carrying out three-dimensional modeling on teeth of a patient, establishing a three-dimensional digital model of a jaw based on reverse engineering, and constructing a bracket-free invisible appliance model;
step 2: adjusting the invisible appliance model, and determining the optimal positions of the lip side and the tongue side of the ideal dental model;
and step 3: connecting the orthodontic appliance crowns in each stage in the design of the invisible orthodontic appliance model into a whole, and outputting three-dimensional model data;
and 4, step 4: performing three-dimensional finite element simulation and topology optimization on the redesigned appliance model to obtain three-dimensional model data of the redesigned appliance model;
and 5: and (3) modifying the optimized three-dimensional model of the appliance, and if the modified three-dimensional model still does not meet the use requirement, returning to the step 3, and if the modified three-dimensional model meets the requirement, processing and manufacturing the appliance according to the modified tooth model.
3. The optimal design method of the invisible dental appliance, according to claim 2, is characterized in that: the step 1 of modeling the tooth model of the patient comprises designing the appliance models in multiple stages by adopting a computer according to clinical data and correction targets of the corrected patient.
4. The optimal design method of the invisible dental appliance of claim 2, wherein the optimal design method comprises the following steps: in the step 2, the invisible orthodontic appliance model is optimized by considering a tooth moving mode and a method of applying load to teeth by the moving mode in the abnormal tooth correction process, and selecting proper orthodontic force.
5. The optimal design method of the invisible dental appliance, according to claim 2, is characterized in that: the finite element analysis result in the step 4 comprises the stress distribution of all teeth, namely periodontal ligament and alveolar bone, and the stress condition of the orthodontic appliance in the invisible orthodontic loading mode without a bracket, the orthodontic appliance is subjected to non-uniform stress in the invisible orthodontic appliance loading mode, the orthodontic appliance to be orthodontic tooth position is greatly deformed to cause stress concentration, the teeth are influenced by orthodontic force, and the stress level of the anchorage tooth is close to that of the orthodontic tooth.
6. The optimal design method of the invisible dental appliance, according to claim 3, is characterized in that: the clinical data at least comprises clinical imaging data, dentition digital model and occlusal surface picture data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310030801.1A CN115983073A (en) | 2023-01-10 | 2023-01-10 | Optimal design method of invisible tooth appliance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310030801.1A CN115983073A (en) | 2023-01-10 | 2023-01-10 | Optimal design method of invisible tooth appliance |
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| Publication Number | Publication Date |
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| CN115983073A true CN115983073A (en) | 2023-04-18 |
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| CN202310030801.1A Pending CN115983073A (en) | 2023-01-10 | 2023-01-10 | Optimal design method of invisible tooth appliance |
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- 2023-01-10 CN CN202310030801.1A patent/CN115983073A/en active Pending
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