CN114099019B - Occlusion pad for maintaining mandible position and manufacturing method and application thereof - Google Patents
Occlusion pad for maintaining mandible position and manufacturing method and application thereof Download PDFInfo
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- CN114099019B CN114099019B CN202111420147.2A CN202111420147A CN114099019B CN 114099019 B CN114099019 B CN 114099019B CN 202111420147 A CN202111420147 A CN 202111420147A CN 114099019 B CN114099019 B CN 114099019B
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- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/002—Orthodontic computer assisted systems
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
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Abstract
The invention discloses an occlusion pad for maintaining the position of a mandible and a manufacturing method and application thereof, S1, obtaining jaw position scanning data before orthodontic treatment, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw before orthodontic treatment; s2, acquiring data of the maxillary dentition and the mandibular dentition in the orthodontic treatment process, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw in the orthodontic treatment process; s3, obtaining the occlusion relation under the target therapeutic jaw position based on the 3D model obtained by CT scanning before orthodontic treatment and the 3D model obtained by intraoral scanning in the orthodontic treatment process; and S4, manufacturing a bite pad based on the bite relation obtained in the step S3. The invention can extract, transmit and accurately achieve the relative position relation between the upper and lower jaws before treatment by sequentially overlapping and designing the repositioning occlusal splint between the digital model and the 3D data of the CT.
Description
Technical Field
The invention relates to the technical field of oral treatment, in particular to an occlusion pad for maintaining the position of a mandible and a manufacturing method and application thereof.
Background
Determining a target jaw position for adapting to an oral-jaw system is one of key factors to be considered when establishing a complete orthodontic treatment plan. In the process of oral diagnosis and treatment, in order to achieve ideal functions and attractiveness, static occlusion and dynamic occlusion are considered simultaneously, so that the health of temporomandibular joints is facilitated, and the whole oral and jaw system is in a balanced state.
To achieve a stable jaw position, some patients may require the use of bite plates to obtain a therapeutic jaw position prior to orthodontic treatment. Orthodontists are always pursuing coordination of occlusal relationship and jaw position, and a healthy and stable therapeutic jaw position (CR position) is beneficial to establishing a stable occlusal relationship and avoiding potential complications.
The therapeutic jaw position is maintained, which is helpful for realizing the therapeutic goal. Failed orthodontic treatment may be associated with bite instability during tooth movement. During orthodontic treatment, it is necessary to ensure that the mandible does not deviate from the therapeutic jaw position, and therefore, it is necessary to design an occlusion pad that can maintain stable occlusion during tooth movement.
Disclosure of Invention
The invention aims to provide an occlusion pad for maintaining the position of a mandible and a manufacturing method thereof.
In addition, the invention also provides application of the bite pad.
The invention is realized by the following technical scheme:
the manufacturing method of the occlusion pad for maintaining the position of the mandible comprises the following steps:
s1, obtaining jaw position scanning data before orthodontic treatment, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw before orthodontic treatment;
s2, acquiring data (dentition 3D models) of maxillary dentition and mandibular dentition in the orthodontic treatment process, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw in the orthodontic treatment process;
s3, dividing the 3D model before orthodontic treatment into two upper and lower parts from the temporomandibular joint, wherein the upper part comprises a skull dome, a skull base, a nasal maxillary complex and a temporal bone joint socket part, and the lower part is a mandible; then overlapping the dentition 3D model in the orthodontic treatment process to replace the dentition jaw bone model before treatment, and overlapping the parts which do not change in shape and position in the orthodontic treatment process respectively; finally, matching the two parts which are free and overlapped by taking the relative position relation between the fossa glenoid part of the temporomandibular joint area of the target therapeutic jaw position in the 3D model before orthodontic treatment and the mandible as a reference to obtain the occlusion relation under the target therapeutic jaw position;
And S4, manufacturing a bite pad based on the bite relation obtained in the step S3.
The invention firstly records the space positions of bilateral temporomandibular joints through CBCT or spiral CT before treatment, obtains the current intraoral scanning data of a patient after the position mode of the mandible is changed, registers the intraoral scanning data with the CT data before operation, and manufactures an occlusion cushion according to a registered 3D structure.
The invention can accurately restore the therapeutic jaw position by matching the tooth model (the star-stl file) obtained by scanning in the orthodontic treatment process with the image jaw dentition data before the orthodontic treatment; an accurate repositioning of the bite pad is achieved. In particular, for patients with temporomandibular joint disorder (TMD), the mandible should be guided back to the target therapeutic jaw position obtained before treatment to solve the problem of mandible displacement during orthodontic treatment.
Therefore, the bite pad prepared by the invention can maintain the position of the mandible in the orthodontic process and ensure the stable occlusion in the tooth moving process.
Further, in step S1, the scan data is acquired as follows:
before orthodontic treatment, the occlusal plate is adjusted to a target therapeutic jaw position, and scanning data is acquired by adopting a digital scanning technology.
Further, digital scanning techniques include over-CBCT or helical CT.
Further, in step S2, the 3D dentition model is obtained by: directly adopting an intraoral scanner to obtain a dentition 3D model, or respectively adopting CT scanning to obtain a 3D model in the orthodontic treatment process, then adopting the intraoral scanner to obtain the dentition 3D model, matching the dentition 3D model with the 3D model in the orthodontic treatment process to obtain a 3D model in the corrected orthodontic treatment process, and finally dividing the 3D model in the corrected orthodontic treatment process into two upper parts and two lower parts from a temporomandibular joint, wherein the upper parts comprise a skull dome, a skull base, a nasal maxillary complex and a temporal glenoid fossa part, the lower parts are mandible, and the dentition 3D models in the upper and lower jaws are used for the step S3.
Further, a 3D model is constructed by adopting Mimics Research software.
Further, in step S4, designing a bite pad based on the digitalized working model, and printing and preparing the bite pad by using a 3D printing technique.
An occlusal pad prepared by the above manufacturing method.
The occlusal pad prepared by the manufacturing method is applied to orthodontic treatment.
Further, orthodontic treatment includes labial lingual fixed bracket correction and bracket-less invisible correction.
The method for determining the occlusion relationship in the orthodontic treatment process comprises the following steps:
s1, obtaining jaw position scanning data before orthodontic treatment, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw before orthodontic treatment;
s2, acquiring data of the maxillary dentition and the mandibular dentition in the orthodontic treatment process, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw in the orthodontic treatment process;
s3, dividing the 3D model before orthodontic treatment into two upper and lower parts from the temporomandibular joint, wherein the upper part comprises a skull dome, a skull base, a nasal maxillary complex and a temporal bone joint socket part, and the lower part is a mandible; then overlapping the dentition 3D model in the orthodontic treatment process to replace the dentition jaw bone model before treatment, and overlapping the parts which do not change in shape and position in the orthodontic treatment process respectively; finally, matching the two parts which are free and overlapped by taking the relative position relation between the fossa glenoid part of the temporomandibular joint area of the target therapeutic jaw position in the 3D model before orthodontic treatment and the mandible as a reference to obtain the occlusion relation under the target therapeutic jaw position;
and S4, manufacturing a bite pad based on the bite relation obtained in the step S3.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the digital model and the 3D data of the CT are sequentially overlapped to design the repositioning occlusion pad, so that the relative position relation between the upper jaw and the lower jaw before treatment can be extracted, transmitted and accurately achieved.
2. The occlusion pad prepared by the manufacturing method can maintain the position of the mandible in the process of tooth correction and ensure the occlusion stability in the process of tooth movement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic representation of a pre-treatment 3D model;
FIG. 2 is a schematic diagram of a pre-treatment 3D model and a post-treatment 3D model stacking process;
FIG. 3 is a schematic view of the design and transfer of a repositioning bite pad;
in fig. 3, a is an overall schematic view of the bite pad manufactured by the manufacturing method of the present invention, and b is a bite force distribution diagram of the bite pad manufactured by the manufacturing method of the present invention; c is a schematic diagram of the bite pad prepared by the preparation method of the invention in the mouth; d is a right view of the bite pad prepared by the manufacturing method of the invention; e is the front view of the bite pad prepared by the preparation method; f is a left view of the bite pad prepared by the manufacturing method of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1 to 2, a method for manufacturing an occlusal pad for maintaining a position of a mandible includes the steps of:
s1, adjusting the jaw position to the target therapeutic jaw position by using the bite plate before orthodontic treatment, and recording the jaw position by CT scanning (first scanning). Using the Mimics Research software to reconstruct a 3D model of a craniofacial complex containing the relative spatial relationship between the upper jaw and the lower jaw, namely a 1 st model, as shown in figure 1;
s2, in the orthodontic treatment process, if the patient has temporomandibular joint disorder symptoms, the position of the mandible is deviated. At this time, due to the occlusion change between the upper and lower jaw dentition teeth, a 3D model of the craniofacial complex at this time needs to be reconstructed. Obtaining a 3D model in the orthodontic treatment process by adopting CT scanning, obtaining a dentition 3D model by adopting an intraoral scanner, and matching the dentition 3D model with the 3D model in the orthodontic treatment process to obtain a corrected 3D model in the orthodontic treatment process, namely a 2 nd model;
S3, dividing the reconstructed 1 st and 2 nd models with occlusion relations into two parts from the temporomandibular joint, wherein the upper part is a skull dome part, a skull base part and a nasal-maxillary complex part, and the lower part is a mandible; wherein the upper and lower jaw dentition parts of the 2 nd model are intraorally scanned dentitions which are changed before the occlusion is more orthodontic, then parts which are not changed in shape and position (such as skull dome and skull base, mandibular ascending branch and mandibular body part) in the orthodontic process are respectively overlapped, and finally the two parts which are free and overlapped are matched by taking the relative position relation of the skull base part of the temporomandibular joint area of the target therapeutic jaw position and the mandible in the 1 st model as a reference, and the relative position relation formed between the upper and lower jaw dentitions with the fixing appliance in the combined complete craniofacial composite body is the occlusion relation under the target therapeutic jaw position;
the specific process is shown in fig. 2:
step 1, divide the 1 st model into the superior parietal dome, the basis cranii and the nasomaxillary complex part and the free mandible. Step 2, the 2 nd model is separated similarly. And step 3: the crown dome and base and mandibular ramus and mandibular body of model 1 and model 2 were superimposed, respectively. And 4, step 4: and transferring the therapeutic jaw position of the 1 st model to the upper and lower jaw tooth models in the orthodontic process.
And S4, designing the occlusion pad based on the digitalized working model, and printing the occlusion pad by adopting a 3D printing technology.
In the embodiment, the occlusal splint is repositioned by sequential overlapping design between the digital model and the 3D data of the CT, so that the relative position relationship between the upper and lower jaws before treatment can be extracted, transmitted and accurately achieved.
Example 2:
the manufacturing method of the occlusion pad for maintaining the position of the mandible comprises the following steps:
s1, adjusting the jaw position to the target therapeutic jaw position with the bite plate before orthodontic treatment, and recording the jaw position by CT scan (first scan). Using the Mimics Research software to reconstruct a 3D model of a craniofacial complex containing the relative spatial relationship between the upper jaw and the lower jaw, namely a 1 st model, as shown in figure 1;
s2, in the orthodontic treatment process, if the patient has temporomandibular joint disorder symptoms, the position of the mandible is deviated. At this time, due to the occlusion change between the upper and lower jaw dentition teeth, a 3D model of the craniofacial complex at this time needs to be reconstructed. Using an intraoral scanner to obtain digital maxillary dentition and mandibular dentition data which are more accurate in occlusion;
s3, dividing the 1 st model (model before treatment) obtained by using CT data into two parts from the temporomandibular joint, wherein the upper part is a skull top dome part, a skull base part and a nasal-maxillary complex part, and the lower part is a mandible; registering the upper and lower dentition scanning model in the S2 with dentition data of the upper and lower jaws in the S1, namely, matching two parts which are free and overlapped by taking the relative position relation between the skull base part of the lower temporal mandibular joint area of the target therapeutic jaw position in the 1 st model and the lower jaw as a reference, wherein the relative position relation formed between the upper and lower dentitions with fixed appliances in the combined complete craniofacial complex is the occlusion relation under the target therapeutic jaw position;
S4, designing the occlusion pad based on the digital working model, and printing and preparing the occlusion pad by adopting a 3D printing technology.
Example 3:
use of bite pads prepared as described in example 1:
an accurate repositioning bite pad is designed based on a digital work model, which can guide the retrogressed mandible to a preset therapeutic jaw position, as shown in fig. 3, and the bounce of the joints at the two sides of the patient is gradually weakened after the bite pad is worn for several hours; after 2 weeks, the patient bounced off and continued to complete orthodontic treatment.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The manufacturing method of the occlusion pad for maintaining the position of the mandible is characterized by comprising the following steps:
s1, obtaining jaw position scanning data before orthodontic treatment, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw before orthodontic treatment;
S2, acquiring a dentition 3D model in the orthodontic treatment process, and constructing a craniofacial complex 3D model containing the relative spatial position relationship between the upper jaw and the lower jaw in the orthodontic treatment process;
s3, dividing the 3D model before orthodontic treatment into an upper part and a lower part from a temporomandibular joint, wherein the upper part comprises a skull dome, a skull base, a nasal maxillary complex and a temporal bone joint socket part, and the lower part is a mandible; then overlapping the dentition 3D model in the orthodontic treatment process to replace the dentition jaw bone model before treatment, and overlapping the parts which do not change in shape and position in the orthodontic treatment process respectively; finally, matching the two parts which are free and overlapped by taking the relative position relation between the fossa glenoid part of the temporomandibular joint area of the target therapeutic jaw position in the 3D model before orthodontic treatment and the mandible as a reference to obtain the occlusion relation under the target therapeutic jaw position;
and S4, manufacturing a bite pad based on the bite relation obtained in the step S3.
2. The method for manufacturing an occlusal pad for maintaining a mandible position as claimed in claim 1, wherein in step S1, the scanning data is obtained as follows:
before orthodontic treatment, the occlusal plate is adjusted to a target therapeutic jaw position, and scanning data is acquired by adopting a digital scanning technology.
3. The method of claim 2, wherein the digital scanning technique comprises over-CBCT or helical CT.
4. The method of manufacturing an occlusal pad for maintaining the position of the mandible according to claim 1, wherein in step S2,
the 3D model of the dentition is obtained by the following steps: directly adopting an intraoral scanner to obtain a dentition 3D model, or firstly adopting CT scanning to obtain a 3D model in the orthodontic treatment process, then adopting the intraoral scanner to obtain the dentition 3D model, matching the dentition 3D model with the 3D model in the orthodontic treatment process to obtain a 3D model in the corrected orthodontic treatment process, and finally dividing the 3D model in the corrected orthodontic treatment process into an upper part and a lower part from a temporomandibular joint, wherein the upper part comprises a skull dome, a skull base, a nasal maxillary complex and a temporal articular fossa part, the lower part is a mandible, and the dentition 3D model in the upper and lower jaws is used for the step S3.
5. The method of claim 1, wherein the 3D model is constructed using mics Research software.
6. The method of claim 1, wherein in step S4, the occlusal pad is designed based on a digital work model, and then printed by a 3D printing technique.
7. The method for determining the occlusion relationship in the orthodontic treatment process is characterized by comprising the following steps of:
s1, obtaining jaw position scanning data before orthodontic treatment, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw before orthodontic treatment;
s2, acquiring data of the maxillary dentition and the mandibular dentition in the orthodontic treatment process, and constructing a 3D model of a craniofacial complex containing the relative spatial position relationship between the upper jaw and the lower jaw in the orthodontic treatment process;
s3, dividing the 3D model before orthodontic treatment into an upper part and a lower part from a temporomandibular joint, wherein the upper part comprises a skull dome, a skull base, a nasal maxillary complex and a temporal bone joint socket part, and the lower part is a mandible; then overlapping the dentition 3D model in the orthodontic treatment process to replace the dentition jaw bone model before treatment, and overlapping the parts which do not change in shape and position in the orthodontic treatment process respectively; and finally, matching the two parts which are separated and overlapped by taking the relative position relation between the fossa glenoid part of the temporomandibular joint area of the target therapeutic jaw position in the 3D model before orthodontic treatment and the mandible as a reference to obtain the occlusion relation of the target therapeutic jaw position.
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| JP2010155103A (en) * | 2010-03-08 | 2010-07-15 | Osaka Univ | Method of manufacturing bite splint |
| CN107080554A (en) * | 2017-05-17 | 2017-08-22 | 杭州口腔医院有限公司 | Remporomandibular joint measuring method, bite plate preparation method |
| CN110667102A (en) * | 2019-11-14 | 2020-01-10 | 天津市口腔医院 | Manufacturing method of repositioning bite plate for treating recoverable anterior displacement of temporomandibular joint disc and repositioning bite plate |
| CN112754693A (en) * | 2021-01-15 | 2021-05-07 | 何冬梅 | Customized temporomandibular joint repositioning occlusal pad and manufacturing and application methods thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010155103A (en) * | 2010-03-08 | 2010-07-15 | Osaka Univ | Method of manufacturing bite splint |
| CN107080554A (en) * | 2017-05-17 | 2017-08-22 | 杭州口腔医院有限公司 | Remporomandibular joint measuring method, bite plate preparation method |
| CN110667102A (en) * | 2019-11-14 | 2020-01-10 | 天津市口腔医院 | Manufacturing method of repositioning bite plate for treating recoverable anterior displacement of temporomandibular joint disc and repositioning bite plate |
| CN112754693A (en) * | 2021-01-15 | 2021-05-07 | 何冬梅 | Customized temporomandibular joint repositioning occlusal pad and manufacturing and application methods thereof |
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