CN107280783B

CN107280783B - Dental appliance for simulating orthodontic effect and manufacturing method thereof

Info

Publication number: CN107280783B
Application number: CN201610221745.XA
Authority: CN
Inventors: 谭理军; 田杰
Original assignee: Wuxi Ea Medical Instruments Technologies Ltd
Current assignee: Wuxi Ea Medical Instruments Technologies Ltd
Priority date: 2016-04-11
Filing date: 2016-04-11
Publication date: 2021-03-05
Anticipated expiration: 2036-04-11
Also published as: CN107280783A

Abstract

In one aspect, the present invention provides a dental device for simulating the orthodontic effect, the dental device having a geometry such that when worn on a patient's dentition, a contour of a side thereof facing a first orthodontic direction substantially matches a tooth arrangement of the first orthodontic tooth in a target position.

Description

Dental appliance for simulating orthodontic effect and manufacturing method thereof

Technical Field

The present application relates generally to the field of orthodontics in the oral clinic, and more particularly to a dental appliance for simulating orthodontic effects and a method of making the same.

Background

In clinical orthodontic correction, there is a need to predict the effect of correction before treatment begins. For example, the patient may need to learn about changes in the corrected face and/or smile before treatment; as another example, the patient may need to know the interference of the corrected teeth with the tongue and/or lips prior to treatment. It is therefore desirable to provide a dental appliance that can simulate the orthodontic effect.

Disclosure of Invention

An aspect of the present application provides a dental device for simulating orthodontic effects, the dental device having a geometry such that when worn on a patient's dentition, a contour of a side thereof facing a first orthodontic direction substantially matches a tooth arrangement of the first orthodontic tooth in a target position.

In some embodiments, the geometry of the dental implement is such that the dental implement is substantially undeformed when worn on the patient's dentition.

In some embodiments, the distance between the original position and the target position of the first orthodontics is greater than the maximum amount of deformation that a single bracket-free invisible appliance can withstand.

In some embodiments, the dental appliance is a unitary shell having a cavity for receiving a plurality of teeth.

In some embodiments, the portion of the cavity corresponding to the first tooth to be straightened has a geometry such that it can accommodate both the first tooth to be straightened in its original position and the first tooth to be straightened in its target position.

In some embodiments, a portion of the cavity corresponding to the first tooth to be straightened has a contour on one side of the straightening direction substantially matching the tooth layout of the first tooth to be straightened in the target position and a contour on the other side opposite to the straightening direction substantially matching the tooth layout of the first tooth to be straightened in the original position.

In some embodiments, the geometry of the portion of the cavity corresponding to the first tooth to be straightened substantially coincides with the trajectory of the first tooth to be straightened moving from the original position to the target position.

In some embodiments, the geometry of the portion of the cavity corresponding to the plurality of other teeth substantially matches the original layout of the teeth.

Yet another aspect of the present application provides a method of making a dental appliance for simulating a corrective effect, comprising: acquiring a composite tooth digital model which represents the original layout of a plurality of teeth and the track of at least one tooth to be corrected moving from the original position to the target position; and manufacturing the dental appliance by using the composite tooth digital model control equipment.

In some embodiments, the method further comprises: obtaining an original digital model representing an original layout of the plurality of teeth and the at least one tooth to be corrected; acquiring a movement track digital data set representing a movement track of the at least one tooth to be corrected moving from an original position to a target position; and generating the composite dental digital model based on the original digital model and the movement trajectory digital data set.

In some embodiments, the method further comprises: generating the movement trajectory digital data set based on the original position and the target position of the at least one tooth to be corrected.

In some embodiments, the method further comprises: manufacturing a corresponding composite male die by using the composite tooth digital model control equipment; and forming a corresponding female die on the composite male die by using a hot-pressing film forming technology to serve as the dental instrument.

Drawings

The above and other features of the present application will be further explained with reference to the accompanying drawings and detailed description thereof. It is appreciated that these drawings depict only several exemplary embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope. The drawings are not necessarily to scale and wherein like reference numerals refer to like parts, unless otherwise specified.

FIG. 1 is a flow chart of a method of manufacturing a dental appliance for simulating a corrective effect in one embodiment of the present application;

FIG. 2A schematically illustrates an original layout of dentition in one embodiment of the present application;

FIG. 2B schematically illustrates a first layout of the dentition shown in FIG. 2A in one embodiment of the present application;

FIG. 2C schematically illustrates a composite positive mold based on the dentition of FIG. 2A in one embodiment of the present application;

FIG. 3 schematically illustrates a dental instrument used in one embodiment of the present application to simulate the orthodontic effect of FIG. 2A;

FIG. 4 schematically illustrates a cross-section along the A-A direction of the dental implement of FIG. 3 when worn on the dental row of FIG. 2;

FIG. 5 schematically illustrates a cross-section along the A-A direction of a dental implement of a further embodiment of the present application when worn on the dental row shown in FIG. 2;

FIG. 6 schematically illustrates a cross-section along the A-A direction of a dental implement of a further embodiment of the present application when worn on the dental row shown in FIG. 2;

FIG. 7 schematically illustrates a cross-section in the A-A direction of a dental implement of a further embodiment of the present application when worn on the dental row shown in FIG. 2;

figure 8 schematically illustrates a cross-section along the direction a-a of a dental implement according to a further embodiment of the present application when worn on the dental row shown in figure 2.

Detailed Description

The following detailed description refers to the accompanying drawings, which form a part of this specification. The exemplary embodiments mentioned in the description and the drawings are only for illustrative purposes and are not intended to limit the scope of the present application. Those skilled in the art, having benefit of this disclosure, will appreciate that many other embodiments can be devised which do not depart from the spirit and scope of the present invention as described herein. It should be understood that the aspects of the present application, as described and illustrated herein, may be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are within the scope of the present application.

FIG. 1 is a flow chart of a method 100 for manufacturing a dental appliance for simulating a corrective effect in one embodiment of the present application.

In 101, an original digital model T representing an original layout of a plurality of teeth and at least one tooth to be straightened is acquired_s. Wherein the plurality of teeth and the at least one tooth to be corrected belong to the same dentition, such as a maxillary dentition or a mandibular dentition.

In some embodiments, the plurality of teeth and the at least one tooth to be corrected are consecutive teeth.

In some embodiments, the plurality of teeth and the at least one tooth to be corrected may be a complete dentition or a partial dentition.

In some embodiments, the original position and the original layout may refer to the position and the layout before any correction is performed, or may refer to the current position and the layout after a portion of the correction is performed.

In some embodiments, the orthodontic effect of only a portion of the teeth to be straightened can be simulated, or the orthodontic effect of all of the teeth to be straightened can be simulated.

In some embodiments, the raw digital model T may be obtained by tomographic X-ray scanning (CAT scanning), digital tomographic X-ray scanning (CT), cone-beam CT scanning (CBCT), Magnetic Resonance Imaging (MRI), intraoral optical scanning, and the like_s。

In still other embodiments, a cast of a patient's teeth, such as a cast of plaster, may be made by conventional means and then scanned by a scanning device, such as a laser scanning device, a CT scanning device, to obtain an original digital model T_s。

The obtained original digital model T_sCan be input into a computer for further processing.

Please refer to fig. 2A, which schematically shows an original digital model T in an embodiment of the present application_sThe original layout of the dentition 200 is shown. Wherein the

teeth

201, 203, 205, and 207 are severely dented and the goal of the correction is to move them labially. Because of the greater amount of correction, the corrected dentition may significantly alter the appearance of the patient's face, particularly the lips. Therefore, there is a need to predict the impact of such correction on facial appearance prior to correction.

In 103, a movement trajectory digital data group P representing a trajectory of the at least one tooth to be corrected moving from the original position to the target position is acquired.

In some embodiments, the movement trajectory digital data set P may be a coordinate data set, which may include coordinates of each stage in the process of moving the at least one tooth to be corrected from the original position to the target position.

In still other embodiments, the movement trajectory digital data set P may include three-dimensional models of stages in the process of moving the at least one tooth to be corrected from the original position to the target position.

In some embodiments, the movement trajectory digital data group P representing the trajectory of the at least one tooth to be corrected moving from the original position to the target position may be generated based on the original position and the target position. For example, refer to the method disclosed in chinese patent No. 98806354.9 (hereinafter referred to as "354 patent") applied by rectification technology company on 19/6/1998.

In some embodiments, a dentist can design the target positions of the teeth 201-207 based on the original layout of the dentition 200 shown in FIG. 2A. The operator can operate the original digital model T on a computer according to the design of the dentist through a human-computer interaction interface_sTo obtain a digital model T representing a first layout of dentition 200₁. FIG. 2B schematically illustrates a first layout of the dentition 200 with the teeth 201-207 in the target positions and the other dentition 200 teethThe teeth are still in the original position.

The differences, such as distances and/or angles, between the original positions of the teeth 201-207 and the target positions are then segmented according to a certain rule to obtain a discrete digital data set P representing the trajectory of the teeth 201-207 moving from the original positions to the target positions.

In still other embodiments, the manual control computer may progressively generate a movement trajectory digital data set P representing a trajectory of the tooth moving from the original position to the target position based on the original position of the tooth 201-207. For example, refer to the method disclosed in chinese patent application No. 201110222246.X (hereinafter, referred to as 246 patent application), which is filed on 8/4/2011 by the tenuous epoch angel medical device technology ltd. The original digital model T can be manually operated on a computer through a human-computer interface_sThe teeth 201-207 are moved step by step from the original positions to the target positions, and the discrete movement trajectories are recorded to obtain a movement trajectory digital data set P representing the trajectories of the teeth 201-207 moving from the original positions to the target positions.

In still other embodiments, the control computer may automatically step-by-step generate a movement trajectory digital data set P representing the trajectory of the teeth 201-207 moving from the original position to the target position based on the original position of the teeth. For example, refer to the method disclosed in chinese patent No. 201110322561.X (hereinafter, referred to as 561 patent application) applied by the tenuous time angel medical device technology ltd on 2011, 10, 21. Can control computer to automatically operate original digital model T by using state space search method_sThe teeth 201 to 207 are gradually moved from the original positions to the target positions, and the discrete movement trajectories are recorded to obtain a movement trajectory digital data group P representing the trajectories of the teeth 201 to 207 moving from the original positions to the target positions.

In 105, based on the original digital model T_sGenerating a composite tooth digital model T by the digital data group P of the moving track_cThe composite tooth digital model T_cRepresenting an original layout of the plurality of teeth and the at least one tooth to be corrected from an original positionA trajectory to move to a target position.

In some embodiments, the movement trajectory digital data set P may include coordinates for each stage in the process of moving the teeth 201-207 from the original position to the target position.

In some embodiments, the data model may be in the raw data model T_sOn the basis, for each of the teeth 201 to 207, the three-dimensional model is set at the coordinates of each stage, and the composite tooth digital model T representing the three-dimensional model including the original layout of the dentition 200 and the three-dimensional model of the movement locus of the teeth 201 to 207 can be obtained_c。

In some embodiments, a composite tooth digital model T may be constructed_cThe part of the tooth representing the moving track of the teeth 201-207 is smoothed.

At 107, a composite tooth digital model T is utilized_cThe control device produces a dental implement for simulating a corrective effect.

In some embodiments, a composite tooth-numeral model T may be utilized first_cA control device, such as a photo-curing device or a 3D printing device, for example, produces a composite male mold 200 a; the shell-like dental appliance 300 is then formed by hot lamination of a polymeric sheet material onto the composite male mold 200 a.

FIG. 2C schematically illustrates the use of a composite dental digital model T in one embodiment of the present application_cThe obtained male mold 200a is produced. Where 201a, 203a, 205a, and 207a are the trajectories/channels of the

teeth

201, 203, 205, and 207, respectively, moving from the original positions to the target positions.

Figure 3 schematically illustrates a dental appliance 300 for simulating a corrective effect prior to correction in one embodiment of the present application. Dental implement 300 is generally shell-shaped having a cavity 301 for receiving a tooth. The cavity 301 includes a first portion 3011, a second portion 3013, a third portion 3015, and a fourth portion 3017, whose geometric shapes substantially conform to the trajectories/channels 201 a-207 a of the teeth 201-207 moving from the original position to the target position, respectively. The geometry of the remainder of the cavity 300 substantially matches the original layout of the teeth of the dentition 200 except for the teeth 201-207.

Referring to fig. 4, a cross-section at a-a of the dental implement of fig. 3 is schematically illustrated when worn on a dentition 200. The geometry of the first portion 3011 of the cavity 301 of the dental implement 300 substantially conforms to the trajectory of the tooth 201 as it moves from the original position to the target position 201'.

In some embodiments, the dental implement 300 has an average thickness of 0.2 to 2 mm.

In still other embodiments, a composite dental-digital model T may be utilized_cA control device, such as a 3D printing device or a numerically controlled machine tool, directly produces the shell-shaped dental appliance 300. For example, after the thickness is set, the composite tooth digital model T can be used_cThe 3D printing device is controlled to directly print out the shell-like dental appliance 300.

In still other embodiments, the model may be based on the original digital model T_sGenerating a composite tooth digital model T with the target positions of the teeth 201-207_c1. Wherein, the composite tooth digital model T_c1The three-dimensional shape represented includes the dentition 200 in the original layout and the teeth 201-207 in the target position.

The composite tooth digital model T can then be utilized_c1A control device, such as a light curing device or a 3D printing device, and the like, is used for manufacturing a composite male die; a thin shell-like dental implement 300a, as shown in figure 5, is formed on the composite male tool by hot lamination of a polymeric sheet material.

Referring to FIG. 5, a cross-section in the A-A direction of a dental implement 300a when worn on the dentition 200 is schematically illustrated. The portion 3011a of the cavity of the dental implement 300a corresponding to the tooth 201 can accommodate both the tooth 201 in the original position and the tooth 201 in the target position 201'. Thus, dental implement 300a may be worn on dentition 200 and may simulate the effects on the patient's facial morphology and on the tactile feel of the lips when teeth 201 are corrected to target position 201'.

In still other embodiments, the composite tooth digital model T may be utilized after a predetermined thickness is set_c1Control devices, e.g. 3D printing devicesPreparing or using a numerical control machine tool, and the like, and directly manufacturing the dental appliance 300a in a thin shell shape.

In still other embodiments, the original digital model T may be utilized_sAnd a composite digital model T_cA control device, such as a 3D printing device or a numerically controlled machine tool, directly produces the dental instrument 300b shown in fig. 6. Referring to fig. 6, a cross-section in the direction a-a of a dental implement 300b when worn on a dental column is schematically illustrated. The geometry of the cavity 301b of the dental appliance 300b substantially conforms to the original layout of the dentition 200, while the geometry of the solid portion 303b of the dental appliance 300b substantially conforms to the remainder of the trajectory of the teeth 201-207 moving from the original position to the target position, except for the portion of the teeth 201-207 in the original position.

In still other embodiments, a first digital model T may be utilized₁A control device, such as a photo-curing device or a 3D printing device, etc., makes the first male mold. A thin shell-like intermediate dental implement is then formed on the first male tool by hot embossing the polymeric sheet material. The intermediate dental appliance is then cut away from the corresponding portion of the side wall on the side opposite the direction of correction so that it can be worn over the dentition 200 in its original configuration, resulting in the dental appliance 300c shown in figure 7.

Referring to fig. 7, a cross-section in the direction a-a of a dental implement 300c when worn on the dentition 200 is schematically illustrated. When dental implement 300c is worn on dentition 200 in its original configuration, tooth 201 is located outside of cavity 301c of dental implement 300 c. Except for the teeth 201-207, other teeth in the dentition 200 are accommodated in the cavity 301 c. And when the dental appliance 300c is worn on the dentition 200 in the original layout, the profile of the side thereof adjacent to the teeth 201-207 substantially conforms to the geometry of the same side of the first layout of the dentition 200.

In still other embodiments, after the predetermined thickness, the first digital model T may be utilized₁Directly manufacturing the intermediate dental instrument by a control device, such as a 3D printing device or a numerical control machine, and cutting and removing a corresponding part of the side wall of the intermediate dental instrument, which is opposite to the correcting direction, to obtain the dental partThe instrument 300 c.

In still other embodiments, the original digital model T may be utilized_sAnd a first digital model T₁A control device, such as a 3D printing device or a numerically controlled machine tool, directly produces the dental instrument 300D shown in fig. 8.

Referring to FIG. 8, a cross-section in the A-A direction of a dental implement 300d when worn on the dentition 200 is schematically illustrated. The geometry of cavity 301d of dental implement 300d substantially conforms to the original layout of dentition 200, while the geometry of solid portion 303d of dental implement 300d conforms to a portion of tooth 201 that does not overlap when in the original position and when in the target position. In this way, dental implement 300d can be worn on dentition 200 in its original configuration, and its profile on the side of the teeth 201 aligned in the direction of alignment matches the configuration of teeth 201 in their target position, thereby simulating the effect of teeth 201 aligned in their target position.

While various aspects and embodiments of the disclosure are disclosed herein, other aspects and embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification. The various aspects and embodiments disclosed herein are for purposes of illustration only and are not intended to be limiting. The scope and spirit of the application are to be determined only by the claims appended hereto.

Likewise, the various diagrams may illustrate an exemplary architecture or other configuration of the disclosed methods and systems that is useful for understanding the features and functionality that may be included in the disclosed methods and systems. The claimed subject matter is not limited to the exemplary architectures or configurations shown, but rather, the desired features can be implemented using a variety of alternative architectures and configurations. In addition, to the extent that flow diagrams, functional descriptions, and method claims do not follow, the order in which the blocks are presented should not be limited to the various embodiments which perform the recited functions in the same order, unless the context clearly dictates otherwise.

Unless otherwise expressly stated, the terms and phrases used herein, and variations thereof, are to be construed as open-ended as opposed to limiting. In some instances, the presence of an extensible term or phrases such as "one or more," "at least," "but not limited to," or other similar terms should not be construed as intended or required to imply a narrowing in instances where such extensible terms may not be present.

Claims

1. A dental device for simulating the orthodontic effect, the geometry of which is such that when worn on a patient's dentition, its profile on the orthodontic direction side of a first tooth to be straightened substantially matches the tooth layout of the first tooth to be straightened when in a target position, the dental device being of one-piece shell shape having a cavity for receiving a plurality of teeth, the cavity corresponding to the first tooth to be straightened being of a geometry such that it can receive both the first tooth to be straightened in its original position and the first tooth to be straightened in the target position.

2. A dental implement according to claim 1, wherein the geometry of the dental implement is such that the dental implement is substantially undeformed when worn on the patient's dentition.

3. A dental apparatus as in claim 1, wherein the distance between the initial position and the target position of the first orthodontics is greater than the maximum amount of deformation that can be tolerated by a single bracket-free invisible appliance.

4. A dental apparatus as in claim 1, wherein the cavity corresponds to the first tooth to be straightened, and wherein a contour of the cavity on one side of the cavity in the straightening direction substantially matches a tooth arrangement of the first tooth to be straightened in the target position, and a contour of the cavity on the other side of the cavity opposite to the straightening direction substantially matches a tooth arrangement of the first tooth to be straightened in the original position.

5. A dental apparatus as in claim 1, wherein the portion of the cavity corresponding to the first tooth to be straightened has a geometry that substantially coincides with a trajectory of the first tooth to be straightened moving from the initial position to the target position.

6. A dental device as in claim 1, wherein the geometry of the portion of the cavity corresponding to the plurality of other teeth substantially conforms to the original layout of the teeth.

7. A method of making a dental appliance for simulating a corrective effect, comprising: acquiring a composite tooth digital model which represents the original layout of a plurality of teeth and the track of at least one tooth to be corrected moving from the original position to the target position; and manufacturing the dental appliance by using the composite tooth digital model control equipment.

8. The method of claim 7, further comprising: obtaining an original digital model representing an original layout of the plurality of teeth and the at least one tooth to be corrected; acquiring a movement track digital data set representing a movement track of the at least one tooth to be corrected moving from an original position to a target position; and generating the composite dental digital model based on the original digital model and the movement trajectory digital data set.

9. The method of claim 8, further comprising: generating the movement trajectory digital data set based on the original position and the target position of the at least one tooth to be corrected.

10. The method of claim 7, further comprising: manufacturing a corresponding composite male die by using the composite tooth digital model control equipment; and forming a corresponding female die on the composite male die by using a hot-pressing film forming technology to serve as the dental instrument.