Method for producing dental treatment index, dental treatment system, and dental treatment index

Abstract

To provide a dental treatment index manufacturing method capable of manufacturing, with a small load, an index that can be restored accurately.SOLUTION: This dental treatment index manufacturing method includes the steps of: manufacturing a tooth model corresponding to a tooth mold of a treatment target; placing a first index made from first material transmitting light so as to coat at least part of the tooth model and injecting polymerization-curable resin having a characteristic transmitting light into a gap between the first index and the tooth model; and curing the polymerization-curable resin to create a second index.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for producing an index (mold) used in injection techniques in dental treatment, a dental treatment system, and an index for dental treatment. [Background technology]

[0002] In the field of dental restorative treatment, composite resin treatment technology has been attracting attention. Composite resin is a composite resin material for dental crowns, which is made by dispersing ceramic particles in a specific ratio in synthetic resin. When the composite resin is injected into the affected area and hardens, it regenerates and repairs the affected area with high functionality and aesthetics. Composite resin treatment technology has many advantages, such as being minimally invasive, having excellent adhesion to tooth tissue, high adhesive durability, and allowing for same-day restoration, and the range of treatments is expanding from simple fillings to cases of multiple teeth or large tooth loss.

[0003] However, composite resin treatment techniques are highly skill-dependent, and when the scale of the restoration is large, chair time can be long and there are often differences in the finished result depending on the surgeon.

[0004] As a method for making composite resin restorations more efficient, Non-Patent Document 1 discloses a technique (injection technique) for pouring low-viscosity composite resin into a clear silicone index. In recent years, clinical applications of this technique utilizing the rapidly developing digital dentistry have been attracting worldwide attention.

[0005] However, an ideal method for producing the index required to perform the injection technique and a simple method for producing the index have not yet been established. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Special Publication No. 7-14401 [Non-patent literature]

[0007] [Non-Patent Document 1] International Dentistry African Edition VOL.5 No.1 P64-72 Summary of the Invention [Problem to be solved by the invention]

[0008] An object of the present invention is to provide a method and system for producing an index for dental treatment, which is capable of producing an index that enables highly accurate restoration with little effort, and an index for dental treatment. [Means for solving the problem]

[0009] In order to solve such problems, the method for producing a dental treatment index according to the present invention is characterized by comprising the steps of: manufacturing a tooth model corresponding to the tooth shape of the treatment target; placing a first index made of a first material that transmits light so as to cover at least a portion of the tooth model; and injecting a polymerized and cured resin having the property of transmitting light between the first index and the tooth model; and hardening the polymerized and cured resin to generate a second index.

[0010] In addition, the dental treatment system according to the present invention is characterized in that it comprises a three-dimensional shape data generation unit that generates three-dimensional shape data of a patient's teeth, a tooth model generation unit that generates a tooth model corresponding to the tooth shape of a treatment target based on the three-dimensional shape data, a first index having a shape that covers at least a portion of the tooth model and made of a first material that transmits light, a polymerization curing resin injector that injects a polymerization curing resin between the first index and the tooth model, and a composite resin injector for injecting a composite resin between a second index made of the hardened polymerization curing resin and the patient's teeth.

[0011] In addition, the dental treatment index according to the present invention is characterized in that it has a shape that covers at least a portion of a tooth model, and when attached to the tooth model, it has a gap between the tooth model and the inner wall into which a polymerized hardened resin can be injected, and is made of a material that transmits light. Effect of the Invention

[0012] According to the present invention, a method for producing an index for dental treatment can be provided, which can produce an index that enables highly accurate restoration with little effort. [Brief description of the drawings]

[0013] [Figure 1] An example of the overall configuration of a dental treatment system 10 for executing an index creating method according to an embodiment of the present invention will be described. [Diagram 2] An example of the configuration of the first index 20 attached to the tooth model M will be described. [Figure 3A] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3B] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3C] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3D] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3E] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3F] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3G] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 3H] The procedure for producing the second index in the dental treatment system 10 of this embodiment will be described. [Figure 4A] The procedure for performing composite resin treatment in the dental treatment system 10 of this embodiment will be described. [Figure 4B] The procedure for performing composite resin treatment in the dental treatment system 10 of this embodiment will be described. [Figure 4C] The procedure for performing composite resin treatment in the dental treatment system 10 of this embodiment will be described. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the present embodiment will be described with reference to the accompanying drawings. In the accompanying drawings, functionally identical elements may be indicated by the same numbers. Note that the accompanying drawings show embodiments and implementation examples according to the principles of the present disclosure, but these are for understanding the present disclosure and are not to be used to interpret the present disclosure in a limiting manner. The description in this specification is merely a typical example and does not limit the scope or application of the present disclosure in any sense.

[0015] In the present embodiment, the description is given in sufficient detail for a person skilled in the art to implement the present disclosure, but it should be understood that other implementations and forms are possible, and that changes in configuration and structure and substitutions of various elements are possible without departing from the scope and spirit of the technical ideas of the present disclosure. Therefore, the following description should not be interpreted as being limited thereto.

[0016] An example of the overall configuration of a dental treatment system 10 for executing an index creation method according to an embodiment of the present invention will be described with reference to Fig. 1. The dental treatment system 10 includes, as an example, an imaging unit 11, a three-dimensional shape data generating unit 12, a three-dimensional CAD system 13, a 3D printer 14, a first index 20, a polymerization curing resin injector 21, a composite resin injector 22, and a light source 23.

[0017] This dental treatment system 10 is configured to create an index with a double structure of transparent resin material and to perform tooth repair and treatment using composite resin treatment technology, and to be able to perform tooth repair using this double-structure index. Specifically, using a tooth model M generated based on the patient's teeth and a first index 20, a second index is generated inside the first index 20, and tooth repair using composite resin is performed using the index with the double structure of the first index 20 and the second index.

[0018] The imaging unit 11 is an imaging device that images the patient's tooth P1. The imaging unit 11 has a plurality of imaging devices (e.g., CMOS sensors, etc.) installed at different positions, and is capable of stereoscopically imaging the patient's tooth P1 by utilizing the parallax. The three-dimensional shape data generating unit 12 generates three-dimensional shape data of the patient's tooth P1 according to the stereoscopic image data and parallax data obtained by the imaging unit 11.

[0019] The three-dimensional CAD system 13 generates three-dimensional post-restoration shape data P2 of the patient's tooth P1 after the affected part is restored, for example, according to the obtained three-dimensional shape data of the patient's tooth P1. The 3D printer 14 (tooth model generating unit) generates a tooth model M showing the state of the tooth after completion of restoration (the shape of the treatment target) based on the three-dimensional post-restoration shape data P2. As the 3D printer 14, a so-called resin fusion type (FDM) or photolithography type can be suitably adopted, but is not limited thereto.

[0020] This dental treatment system 10 includes a plurality of first indexes 20 as dental treatment indexes to be attached to the tooth model M. An example of the configuration of the first index 20 will be described with reference to FIG. 2. The first index 20 has a shape that covers at least a part of the tooth model M, and can be formed from a resin material having a certain degree of light transmittance, such as a light-transmitting acrylic resin. The first index 20 has a volume slightly larger than the tooth model M, and specifically, has a size such that its inner wall does not come into contact with the tooth model M, and has a gap between the tooth model M and the inner wall into which a polymerized cured resin can be injected. In the dental treatment system of this embodiment, a light-cured resin is injected and cured into the space between the first index 20 and the tooth model M to form a second index (dental treatment index).

[0021] The first index 20 may be a whole index 20W having a shape that covers the whole tooth model M, or may be a front tooth index 20F that covers only a part of the tooth model M, such as the front tooth part, or a back tooth index 20L, 20R that covers only the back tooth part. An appropriate index can be selected depending on which part is affected (where restoration is required). The shape of the index shown in the figure is merely an example, and it is also possible to adopt an index divided into smaller areas.

[0022] As described later, the first index 20 may be an overall index 20W', an index for anterior teeth 20F', or an index for posterior teeth 20R', 20L', each of which has a hole H on its surface for injecting the polymerization curing resin from the polymerization curing resin injector 21. The hole H may be opened by a drilling machine or the like attached to the polymerization curing resin injector 21 or the composite resin injector 22, so it is also possible to adopt a first index 20 without a hole.

[0023] The composite resin injector 22 is configured to be able to inject composite resin into the gap between the second index and the patient's tooth after the second index formed as described above is attached to the patient's tooth. The composite resin is a resin material in which ceramic particles are dispersed at a predetermined ratio in a transparent light-curing resin material such as silicone resin as described above, and is hardened by being irradiated with light from the light source 23. The light source 23 is configured to be able to irradiate ultraviolet light for hardening the light-curing resin, and is also able to irradiate blue visible light having a wavelength of about 460 nm for hardening the composite resin.

[0024] 1 do not need to be concentrated in one place, and may be distributed in different locations. For example, the imaging unit 11 may be located in a dental clinic where a patient is located, while the 3D printer 14 may be located in a dental laboratory where the tooth model M is produced. The components in FIG. 1 may be connected by wired lines, or may be configured to be able to transmit and receive data by wireless communication.

[0025] Next, the procedure for producing the second index in the dental treatment system of this embodiment will be described with reference to Figures 3A to 3H. First, as shown in Figure 3A, a tooth model M generated by the system of Figure 1 is prepared, a first index 20 to be applied to this tooth model M is selected, and a polymerizable curable resin is injected from a polymerizable curable resin injector 21 into the recess of the first index 20.

[0026] After further injecting the polymerization curing resin around the tooth model M, the first index 20 is fitted into the tooth model M as shown in Fig. 3B. At this time, the operator checks that the injected polymerization curing resin is embedded between the tooth model M and the first index 20 without any gaps, and if the operator finds that the injection is insufficient, the operator can inject the polymerization curing resin again from the polymerization curing resin injector 21, for example, through the hole H. Since the first index 20 is made of a transparent resin material, the state of the injection of the polymerization curing resin can be transparently confirmed through the first index 20.

[0027] When the polymerized curable resin is sufficiently injected into the gap, the polymerized curable resin hardens after a predetermined time (several minutes) has elapsed. When the polymerized curable resin is a photocurable resin, it is also possible to harden the photocurable resin by irradiating the photocurable resin with light (ultraviolet light, etc.) from a light source 23 through the first index 20 as shown in FIG. 3C. The hardened polymerized curable resin becomes the second index 24 that reflects the shape of the tooth model M. When hardening is complete, the tooth model M is removed from the second index 24 as shown in FIG. 3D, and the second index 24 is also removed from the first index 20.

[0028] When the second index 24 is removed from the first index 20, a burr BR is formed on the surface of the second index 24 at a position corresponding to the hole H (see FIG. 3E). In addition to the burr BR, a large amount of polymerized and cured resin may protrude outside the first index 20. The worker removes and shapes the burr BR and the polymerized and cured resin protruding to the outside using, for example, a knife 31 (see FIG. 3F), and then fits the second index 24 back into the first index 20 (see FIGS. 3G and 3H).

[0029] After fitting, and before attaching to the patient's tooth RT, holes can be provided in the first index 20 and the second index 24 in advance at positions corresponding to the missing teeth of the patient using a diamond bur or the like for dental engineering. The index formed by overlapping the first index 20 and the second index 24 is attached to the patient's tooth RT (FIG. 4A).

[0030] Since the patient's actual tooth RT has a missing part CR, the operator pierces the index with the injection needle of the composite resin injector 22 through the injection hole that has been provided in advance, and injects the composite resin into the missing part CR (see FIG. 4B). After that, the composite resin is irradiated with light (blue visible light) through the first index 20 and the second index 24 to harden the composite resin (see FIG. 4C). As a result, the composite resin hardens in the missing part CR and bonds with the surrounding tooth structure, so that the missing part is filled with the composite resin and the restoration is completed.

[0031] As described above, it is possible to stack the first index 20 and the second index 24, then attach them to the patient's tooth RT and inject composite resin through the injection hole. Alternatively, it is also possible to attach only the second index 24 to the patient's tooth RT, inject composite resin into it, and then attach the first index 20 on top of it.

[0032] As described above, in this embodiment, since the first index 20 is formed from a transparent resin material, the second index 24 can be formed while checking the injection status of the transparent polymerized and cured resin injected into the gap with the tooth model M. Then, the composite resin is injected into the gap with the patient's tooth using an index formed by superimposing the first index 20 and the second index 24, so the injection work of the composite resin can also be performed while visually checking the injection status.

[0033] The present invention is not limited to the above-described embodiment, and includes various modified examples. For example, the above-described embodiment has been described in detail to clearly explain the present invention, and is not necessarily limited to those having all of the described configurations. In addition, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. In addition, it is possible to add, delete, or replace a part of the configuration of each embodiment with another configuration. In addition, each of the above-described configurations, functions, processing units, processing means, etc. may be realized in part or in whole by hardware, for example, by designing them as integrated circuits. [Explanation of symbols]

[0034] 10. Dental treatment system 11...Imaging unit 12...3D shape data generation unit 13...3D CAD system 14…3D printer 20…First index 20F, 20F'... index for front teeth 20L, 20L', 20R, 20R'... Index for back teeth 20W, 20W'... Overall index 21...Polymerization hardening resin injector 22...Composite resin injector 23…Light source 24…2nd index 31...Knife BR…Bali H…hole M…Tooth model RT…Teeth

Claims

1. manufacturing a dental model corresponding to the treatment target tooth shape; placing a first index made of a first material that transmits light so as to cover at least a part of the tooth model, and injecting a polymerized hardening resin having a property of transmitting light between the first index and the tooth model; curing the polymerizable resin to produce a second index. A method for producing an index for dental treatment, comprising:

2. The first index has a hole for injecting the polymerization curing resin, The method for producing a dental treatment index according to claim 1 , further comprising the step of injecting the polymerized hardened resin through the hole.

3. After the second index is generated, the second index is separated from the first index, shaped, and then superimposed on the first index again.

2. A method for producing a dental treatment index according to claim 1.

4. The first index is The method for producing a dental treatment index as described in claim 1, which is sized so that when attached to the tooth model, there is a gap between the tooth model and the inner wall into which the polymerized hardened resin can be injected.

5. a three-dimensional shape data generating unit for generating three-dimensional shape data of a patient's teeth; a tooth model generating unit that generates a tooth model corresponding to a tooth shape of a treatment target based on the three-dimensional shape data; A first index having a shape that covers at least a part of the dental model and made of a first material that transmits light; a polymerization hardening resin injector for injecting a polymerization hardening resin between the first index and the tooth model; a composite resin injector for injecting a composite resin between a second index made of the hardened polymerized resin and the patient's teeth; A dental treatment system comprising:

6. The dental treatment system of claim 5 , wherein the first index includes a hole for injecting the polymerized hardening resin.

7. The first index is An index for front teeth having a shape that covers only the front teeth portion of the tooth model; A molar index having a shape that covers only the molar portion of the tooth model; an entire index having a shape that covers the entire tooth model; The dental care system of claim 5 .

8. A dental treatment index having a shape that covers at least a part of a dental model, When the dental model is attached to the dental model, a gap into which a polymerized cured resin can be injected is formed between the dental model and the inner wall, The dental index further comprises: a first index made of a material that transmits light; A second index formed by hardening the polymerization hardening resin injected between the tooth model and the inner wall; Equipped A dental treatment index characterized by:

9. 9. The dental treatment index according to claim 8, further comprising a hole for injecting said polymerized hardening resin.

Images