CN110811873B - A digital molar occlusal surface caries restoration method - Google Patents

Abstract

The invention belongs to the technical field of tooth restoration, and discloses a digital caries restoration method for the occlusal surface of molars. The invention includes: acquiring a digital three-dimensional model of caries to be repaired in the human mouth; obtaining an occlusal surface to be repaired according to the current three-dimensional model; obtaining an ideal occlusal surface according to the current occlusal surface to be repaired, and then constructing a guide plate model; and completing the production of the guide plate entity according to the current guide plate model ;Use the current guide plate entity to complete the restoration of the current caries to be restored. The invention adopts the digital technology to make the guide plate entity to realize caries repair, reduces the dependence of the caries repair on the doctor's technology, and relies on the guide plate entity to shape the filling body, avoiding the inconvenience of the doctor manually adjusting the occlusal surface running-in, and causing the healthy teeth to wear during the repair process. It is smaller, reduces the repair time, greatly improves the efficiency of caries repair, and is suitable for popularization and use.

Description

A digital molar occlusal surface caries restoration method

technical field

The invention belongs to the technical field of tooth restoration, and in particular relates to a digital caries restoration method for the occlusal surface of molars.

Background technique

Dental caries is a high incidence of human oral cavity. The occlusal surface of molars has a large number of fissures on the surface, and food residues are easily impacted, which leads to the occurrence of caries. The caries starts from the bottom of the fissure and progresses under the enamel surface. , causing the patient's teeth to feel cold and hot, and occlusal pain. The appearance of the occlusal surface of this type of caries is usually relatively intact in the early and middle stages of the onset, and as the caries progresses, the surface enamel cracks under the action of occlusal force to form occlusal surface defects. After the caries problem is found, it is necessary to grind the carious tooth (cavity preparation) and then perform filling treatment. Usually, there is a large area of defect in the tooth after the caries preparation. When filling, the doctor uses tooth-color composite resin, relying on subjective experience. Refer to the contralateral tooth with the same name and the shape of the remaining teeth for shape stacking; at the same time, some foreign experts have begun to use flow resin or silicone rubber to make seals in the mouth, and use the seal to replicate the relatively complete shape of the occlusal surface of the tooth, and restore it through the seal after removing caries and preparing cavities. original form.

In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art:

a. The shape of the occlusal surface cannot be accurately repaired when using composite resin for direct molding;

b. The occlusal contact of the occlusal surface of the molars cannot be accurately restored when using composite resin for direct molding;

c. Since the color of the filling material is similar to the color of the teeth, it is easy to accidentally injure the surrounding normal tooth tissue when adjusting the shape of the restoration or occlusal adjustment, resulting in postoperative complications such as sensitivity;

d. When using the existing seal method for caries repair, due to the narrow space in the patient's mouth, the seal is inconvenient to shape, and it is easily disturbed by the patient's saliva, and the seal method cannot be accurately placed, and it is easy to form a bad restoration;

e. Both the direct repair method and the seal method have higher requirements on the proficiency of clinicians.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the above technical problems at least to a certain extent.

Therefore, the purpose of the present invention is to provide a digital caries repair method on the occlusal surface of molars, which can digitize and process the caries repair on the occlusal surface of molars, achieve accurate caries repair, and reduce technical sensitivity.

The technical scheme adopted in the present invention is:

A digital molar occlusal surface caries restoration method, comprising the following steps:

Obtain a digital three-dimensional model of the caries to be repaired in the human mouth;

Obtain the occlusal surface to be repaired according to the current 3D model;

The ideal occlusal surface is obtained according to the current occlusal surface to be repaired, and then the guide plate model is constructed;

Complete the production of the guide plate entity according to the current guide plate model;

Use the current guide entity to complete the restoration of the current caries to be restored.

Preferably, when calculating the ideal occlusal surface of any occlusal surface to be repaired, the specific steps are as follows:

Obtain the occlusal surface information according to the current 3D model;

Obtain the occlusal surface to be repaired according to the current occlusal surface information, wherein one caries to be repaired corresponds to the occlusal surface to be repaired;

Determine whether the occlusal surface to be repaired has obvious defects. If so, obtain the template occlusal surface of the tooth with the same name corresponding to the occlusal surface to be repaired. If not, take the occlusal surface to be repaired as the ideal occlusal surface;

Then fit the occlusal surface of the current template to the occlusal surface to be repaired;

Compare the occlusal surface of the current template with the occlusal surface to be repaired after fitting, remove the part of the occlusal surface of the template that overlaps with the occlusal surface to be repaired, and obtain an ideal occlusal surface.

Preferably, after comparing the occlusal surface of the current template with the occlusal surface to be repaired, the following steps are also included:

After removing the part of the occlusal surface of the template that overlaps with the occlusal surface to be repaired, the initial occlusal surface is obtained;

A simulated occlusal test is performed on the 3D model including the initial occlusal surface, and it is judged whether the occlusal test is passed. If so, the current initial occlusal surface is taken as the ideal occlusal surface. If not, the initial occlusal surface is adjusted.

Preferably, when adjusting the initial occlusal surface, first obtain the occlusal contact point, then lower the occlusal high point of the initial occlusal surface, and then repeat the simulated occlusal test until the occlusal test passes.

Preferably, the bottom of the guide plate model is a female mold corresponding to the ideal occlusal surface, and the top of the guide plate model is extended with a clamping portion.

Preferably, when using the current guide plate entity to complete the restoration of the caries currently to be repaired, the current guide plate entity is used to shape the filling body of the caries currently to be repaired, and the filling body is solidified on the prepared cavity of the caries to be repaired.

Preferably, EXOCAD software is used to construct the guide plate model.

Preferably, 3D printing technology is used for the production of the guide plate entity; when the guide plate entity is produced according to the current guide plate model, the file containing the guide plate model is first converted into an STL file in a standard mosaic language, and then the STL file is sent to the 3D printing device, 3D The printing device completes the printing of the guide plate entity according to the guide plate model in the STL file.

The beneficial effects of the present invention are:

The invention adopts the digital technology to make the guide plate entity to realize the caries repair of the occlusal surface of the molars, reduces the dependence of the caries repair on the doctor's technology, and relies on the guide plate entity to shape the filling body to avoid the inconvenience of the doctor manually adjusting the occlusal surface running-in, so that the repair process is not easy. Healthy teeth wear less, reduce repair time, greatly improve the efficiency of caries repair, reduce technical sensitivity, and are suitable for popularization and use.

Other beneficial effects of the present invention will be described in detail in the detailed description.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a flowchart of Embodiment 1. FIG.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted here that, although the description of these embodiments is for helping understanding of the present invention, it does not constitute a limitation of the present invention. The functional details disclosed herein are merely used to describe example embodiments of the present invention. The present invention, however, may be embodied in many alternative forms and should not be construed as limited to the embodiments set forth herein.

It is to be understood that the terminology used herein is for describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. If the terms "comprising", "including", "including" and/or "comprising" are used in the present invention, they designate the presence of the stated feature, integer, step, operation, unit and/or component, And does not preclude the presence or addition of one or more other features, numbers, steps, operations, units, components and/or combinations thereof.

It should also be noted that in some alternative implementations, the functions/acts may occur out of the order in which they occur in the figures. For example, two figures shown in succession may in fact be executed substantially concurrently, or the two figures shown in succession may sometimes be executed in the reverse order, depending upon the functionality/acts involved.

It should be understood that specific details are provided in the following description to facilitate a thorough understanding of example embodiments. However, it will be understood by those of ordinary skill in the art that example embodiments may be practiced without these specific details. For example, systems may be shown in block diagrams to avoid obscuring the examples with unnecessary detail. In other instances, well-known processes, structures and techniques may not be shown in unnecessary detail to avoid obscuring example embodiments.

Example 1:

As shown in FIG. 1 , the present embodiment provides a digital caries repair method on the occlusal surface of a molar, including the following steps:

Obtain a digital three-dimensional model of the caries to be repaired in the human mouth;

Obtain the occlusal surface to be repaired according to the current 3D model;

The ideal occlusal surface is obtained according to the current occlusal surface to be repaired, and then the guide plate model is constructed;

Complete the production of the guide plate entity according to the current guide plate model;

Use the current guide entity to complete the restoration of the current caries to be restored.

In this embodiment, digital technology is used to make the guide plate entity to realize caries repair, which reduces the dependence of the caries repair on the doctor's technology. Relying on the guide plate entity to shape the filling body avoids the inconvenience of the doctor manually adjusting the occlusal surface running-in, so that the repair process will not affect the healthy teeth. The wear is smaller, the restoration time is reduced, and the efficiency of caries restoration is greatly improved.

Example 2

The technical solution provided in this embodiment is a further improvement made on the basis of the technical solution in Embodiment 1. The technical features that distinguish this embodiment from Embodiment 1 are:

In this embodiment, when calculating the ideal occlusal surface of any occlusal surface to be repaired, the specific steps are as follows:

Obtain the occlusal surface information according to the current 3D model;

Obtain the occlusal surface to be repaired according to the current occlusal surface information, wherein one caries to be repaired corresponds to the occlusal surface to be repaired;

Determine whether the occlusal surface to be repaired has obvious defects. If so, obtain the template occlusal surface of the tooth with the same name corresponding to the occlusal surface to be repaired. If not, take the occlusal surface to be repaired as the ideal occlusal surface; The occlusal surface of the tooth with the same name corresponding to the occlusal surface to be repaired is not the occlusal surface of the template, and the appropriate tooth shape is automatically selected from the software database pre-stored with a large number of tooth models.

Then fit the occlusal surface of the current template to the occlusal surface to be repaired; among them, the fitting is not simply covering, but two objects with high similarity are overlapped, the target object remains unchanged during the process, and the fitting will be retained In the case of the original features, the volume, shape, direction, etc. are finely adjusted and overlapped.

Compare the occlusal surface of the current template with the occlusal surface to be repaired after fitting, remove the part of the occlusal surface of the template that overlaps with the occlusal surface to be repaired, and obtain an ideal occlusal surface.

Example 3

The technical solution provided in this embodiment is a further improvement on the basis of the technical solution in Embodiment 2. The technical features of the difference between this embodiment and Embodiment 2 are:

In this embodiment, after comparing the occlusal surface of the current template with the occlusal surface to be repaired, the following steps are also included:

After removing the part of the occlusal surface of the template that overlaps with the occlusal surface to be repaired, the initial occlusal surface is obtained;

Perform a simulated occlusal test on the three-dimensional model including the initial occlusal surface in the electronic articulator, and determine whether the occlusal test passes. If so, take the current initial occlusal surface as the ideal occlusal surface; if not, adjust the initial occlusal surface; ,

As one of the preferred embodiments, when adjusting the initial occlusal surface, first obtain the occlusal contact point, then lower the occlusal high point of the initial occlusal surface, and then repeat the simulated occlusal test until the occlusal test passes.

As another preferred embodiment, a simulated occlusion test is performed on the three-dimensional model including the initial occlusal surface in the electronic articulator; wherein, the electronic articulator is designed based on the principle of the articulator, and the articulator is a fixed upper and lower frame. It has parts and joints equivalent to the human chewing organs, and can simulate the movement of the mandible to a certain extent. The electronic articulator is a digital model, and the digital model is measured and evaluated by simulating the real articulator through software. .

Example 4

The technical solution provided in this embodiment is a further improvement on the basis of any of the technical solutions in Embodiments 1-3. The technical features that distinguish this embodiment from any of Embodiments 1-3 are:

In this embodiment, the bottom of the guide plate model is the female mold corresponding to the ideal occlusal surface, and the top of the guide plate model is extended with a clamping portion; wherein, the female mold of the ideal occlusal surface is a preset occlusal relationship with the ideal occlusal surface. The occlusal surface of the ideal occlusal surface can closely fit the negative mold of the ideal occlusal surface, so that the expected shape can be restored as high as possible during the treatment, so as to ensure that the occlusal relationship between the caries and other teeth will not appear after the restoration. question.

Example 5

The technical solution provided in this embodiment is a further improvement on the basis of any of the technical solutions in Embodiments 1-4. The technical features that distinguish this embodiment from any of Embodiments 1-4 are:

In this embodiment, when the current guide plate entity is used to complete the restoration of the caries currently to be repaired, the current guide plate entity is used to shape the filling body of the caries to be repaired, and the filling body is solidified on the prepared cavity of the caries to be repaired; wherein, the specific operation When the filling body is shaped, it is necessary to remove the guide plate entity, trim the edges of the filling body, and then solidify the filling body, so that the filling body can be cured by, but not limited to, a light curing lamp.

Example 6

The technical solution provided in this embodiment is a further improvement on the basis of any of the technical solutions in Embodiments 1-5. The technical features that distinguish this embodiment from any of Embodiments 1-5 are:

In this embodiment, EXOCAD software is used to construct the guide plate model; EXOCAD software is a common special software for oral digital restoration. It has complete functions and a massive database of tooth shapes. The operation is simple. And the EXOCAD software is compatible with the output files of the current common oral scanners, and the data output after the design is completed can also be directly printed by the 3D printing equipment.

Example 7

The technical solution provided in this embodiment is a further improvement on the basis of any of the technical solutions in Embodiments 1-6. The technical features that distinguish this embodiment from any of Embodiments 1-6 are:

In this embodiment, 3D printing technology is used for the production of the guide plate entity; when the guide plate entity is produced according to the current guide plate model, the file containing the guide plate model is first converted into an STL file in a standard mosaic language, and then the STL file is sent to the 3D printing device. , the 3D printing equipment completes the printing of the guide plate entity according to the guide plate model in the STL file.

The above-described embodiments are only illustrative. If the units described as separate components are involved, they may or may not be physically separated; if the components shown as units are involved, they may or may not be A physical unit, which can be located in one place or distributed over multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

The above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The recorded technical solutions are modified, or some technical features thereof are equivalently replaced. However, these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

The present invention is not limited to the above-mentioned optional embodiments, and anyone can derive other various forms of products under the inspiration of the present invention. The above specific embodiments should not be construed as limiting the protection scope of the present invention, which should be defined in the claims, and the description can be used to interpret the claims.

Claims (4)

1. a digital molar occlusal surface caries repair method, is characterized in that: comprise the following steps: Obtain a digital three-dimensional model of the caries to be repaired in the human mouth; Obtain the occlusal surface to be repaired according to the current 3D model; The ideal occlusal surface is obtained according to the current occlusal surface to be repaired, and then the guide plate model is constructed; Complete the production of the guide plate entity according to the current guide plate model; Obtain the occlusal surface information according to the current 3D model; Obtain the occlusal surface to be repaired according to the current occlusal surface information, wherein one caries to be repaired corresponds to the occlusal surface to be repaired; Determine whether the occlusal surface to be repaired has obvious defects. If so, obtain the template occlusal surface of the tooth with the same name corresponding to the occlusal surface to be repaired. If not, take the occlusal surface to be repaired as the ideal occlusal surface; Then fit the occlusal surface of the current template to the occlusal surface to be repaired; Compare the occlusal surface of the current template with the occlusal surface to be repaired after fitting, remove the overlapping part of the occlusal surface of the template with the occlusal surface to be repaired, and obtain the ideal occlusal surface; After comparing the occlusal surface of the current template with the occlusal surface to be repaired, the following steps are also included: After removing the part of the occlusal surface of the template that overlaps with the occlusal surface to be repaired, the initial occlusal surface is obtained; Perform a simulated occlusal test on the 3D model including the initial occlusal surface, and judge whether the occlusal test passes. If so, take the current initial occlusal surface as the ideal occlusal surface, if not, adjust the initial occlusal surface; When adjusting the initial occlusal surface, first obtain the occlusal contact point, then lower the occlusal high point of the initial occlusal surface, and then repeat the simulated occlusal test until the occlusal test passes. 2 . The digital caries repair method on the occlusal surface of molar teeth according to claim 1 , wherein the bottom of the guide plate model is a negative mold corresponding to the ideal occlusal surface, and the top of the guide plate model is extended with a clamping portion. 3 . 3. The digital molar occlusal surface caries repair method according to any one of claims 1-2, characterized in that: constructing the guide plate model adopts EXOCAD software. 4. The digital molar occlusal surface caries repair method according to any one of claims 1-2, characterized in that: 3D printing technology is used for the production of the guide plate entity; when the guide plate entity is produced according to the current guide plate model, first the guide plate model will be included. The file is converted into an STL file of standard mosaic language, and then the STL file is sent to the 3D printing device, and the 3D printing device completes the printing of the guide plate entity according to the guide plate model in the STL file.

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