Prosthesis, prosthesis formation device, and prosthesis formation method

Abstract

To provide a prosthesis that is used to be capable of inhibiting the occurrence of a change of a jaw position, root fracture and the like before or during treatment and capable of reducing a change of a treatment plan, a prosthesis formation device, and a prosthesis formation method.SOLUTION: A prosthesis 1 comprises a prosthetic body 10 which assumes a barrier shape for a tooth 20 to be treated and which has a dental occlusion surface 12 provided with an open part 14 enabling root canal treatment. The prosthetic body is bonded to the tooth crown or tooth root of the tooth before or during the treatment.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a prosthesis, a prosthesis forming device, and a method for forming a prosthesis in dental treatment. [Background technology]

[0002] Conventionally, in dental treatment of cavities, etc., artificial dental crowns (so-called crowns) have been used as prosthetic devices. As a conventional dental treatment method, the following procedure is shown in Non-Patent Document 1.

[0003] The treatment method shown in Non-Patent Document 1 involves scraping off the decayed part of the tooth when the tooth's crown becomes tattered due to the decay reaching the nerve, and removing the nerve and treating with medicine if the decay has reached the nerve. The decayed part of the crown of the tooth that has had the nerve treated is then scraped off, a metal or plastic base is attached and shaped, and then an impression material, which is used to make a mold of teeth, is used to make a mold. A model of the same shape as the scraped tooth is made using this mold, and a crown is made on top of it using ceramics (pottery), plastic, and metal, and this crown is then attached to the metal base with cement (adhesive).

[0004] If the cavity has not reached the nerve, the decayed part will be removed and a crown will be placed directly on top of it, but even if the root is relatively strong, root canal treatment is often necessary.

[0005] Patent Document 1 also describes that an artificial tooth includes a prosthesis, an insertion portion inserted in one direction into the prosthesis, and an abutment including a protrusion protruding from the prosthesis, the insertion portion is inclined so that the diameter of the outer circumferential surface increases in one direction, the protrusion portion is inclined so that the diameter of the outer circumferential surface decreases in one direction, and when the prosthesis is a workpiece structure, one end of the protrusion is connected to an artificial tooth processing device. It also describes that the prosthesis includes a through hole penetrating the inside of the prosthesis in one direction. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent Publication No. 2022-22069 [Non-patent literature]

[0007] [Non-Patent Document 1] What is prosthetic dentistry?, [online], Japan Prosthodontic Society, Date of publication unknown,<URL:https: / / hotetsu.com / p2_01.html> ,[Retrieved July 10, 2023],Internet Summary of the Invention [Problem to be solved by the invention]

[0008] However, in conventional prosthetic treatment procedures, prosthetic devices are manufactured and attached after all treatments such as caries treatment and root canal treatment are completed. In such conventional treatment procedures, when occlusion collapse occurs and full-arch treatment is required, there are many cases where the jaw position changes or tooth root fractures occur during the treatment of individual teeth, forcing the treatment plan to be changed midway.

[0009] Furthermore, in order to manufacture the upper structure and abutment of the implant in Patent Document 1 using a screw fixation method, a cylindrical hole is provided in the occlusal surface direction, but it does not change the fact that the prosthetic device will be manufactured and attached after all treatments such as cavity treatment and root canal treatment have been completed.

[0010] The present invention has been made in consideration of the above circumstances, and aims to provide a prosthetic device, a prosthetic device forming device, and a method for forming a prosthetic device that, by using the prosthetic device of the present application, can suppress changes in jaw position and tooth root fractures before and during treatment, thereby reducing changes to the treatment plan. [Means for solving the problem]

[0011] The prosthetic device described in claim 1 is characterized in that it comprises a prosthetic body that is shaped like a partition against the tooth to be treated and has an opening on the occlusal surface of the tooth to enable treatment of the root canal, and the prosthetic body is attached to the crown or root of the tooth before or during treatment.

[0012] The prosthetic device described in claim 2 has the features of claim 1, in addition to the fact that the prosthetic body is annular, and the opening of the prosthetic body is an access hole that enables treatment to a root canal provided on the occlusal surface.

[0013] The prosthesis forming device described in claim 3 comprises a scanning means for capturing images of the teeth and their surroundings before or during treatment, and a prosthesis forming means for forming the shape of a prosthesis based on the data captured by the scanning means, and the prosthesis whose shape is formed by the prosthesis forming means is attached to the crown or root of the tooth before or during treatment, is partition-like against the tooth, and has an opening on the occlusal surface of the tooth to enable treatment of the root canal.

[0014] The prosthesis forming device according to claim 4 has the features of claim 3, and is characterized in that the prosthesis formed by the prosthesis forming means is annular, and the opening of the prosthesis is an access hole that allows treatment to a root canal provided on the occlusal surface.

[0015] The method for forming a prosthetic device described in claim 5 involves taking an impression of the tooth and its surroundings before or during treatment, and attaching it to the crown or root of the tooth before or during treatment based on the mold information obtained by taking the impression, and forming a shape of a prosthetic device that is partition-like against the tooth and has an opening on the occlusal surface of the tooth to allow treatment to the root canal.

[0016] The method for forming a prosthetic device described in claim 6 involves imaging the teeth and their surroundings before or during treatment, and based on the imaged data, bonding to the crown or root of the tooth before or during treatment, and forming a shape of a prosthetic device that is partition-like against the tooth and has an opening on the occlusal surface of the tooth to allow treatment to the root canal.

[0017] The method of forming a prosthetic device according to claim 7 has the features of claim 5 or claim 6, and is characterized in that the formed prosthetic device is annular, and the open portion of the prosthetic device is an access hole that allows treatment to a root canal provided on the occlusal surface. Effect of the Invention

[0018] According to the present invention, by using the prosthetic device of the present invention, it is possible to suppress changes in jaw position and tooth root fractures before and during treatment, thereby reducing changes to the treatment plan. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1 is an explanatory diagram showing an example of a prosthetic device according to the present invention. [Diagram 2] FIG. 11 is an explanatory diagram showing an example of a method of using the prosthetic device. [Diagram 3] FIG. 2 is an explanatory diagram showing a vertical cross section of the prosthetic device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is an explanatory diagram showing an example of a prosthetic device of the present invention. Fig. 2 is an explanatory diagram showing an example of a method of using the prosthetic device. Fig. 3 is an explanatory diagram showing a longitudinal section of the prosthetic device.

[0021] The prosthetic device 1 according to the present application is used in dental treatment. In conventional prosthetic dental treatment procedures, an artificial crown is produced and bonded to the tooth after all treatments such as caries treatment and root canal treatment are completed, but the prosthetic device 1 is bonded to the crown 22 or root 30 of the tooth 20 before or during treatment.

[0022] Here, bonding the prosthetic device 1 (prosthetic body 10) does not mean to bond it temporarily before or during treatment, but to fix or bond it in a state that allows it to be used continuously after treatment. In addition, although the terms "crown" and "root" are used in this specification, the crown and root may be artificial, and are not dependent on their origin. The crown 22 and root 30 shown in this embodiment and the drawings are described as examples that are not artificial.

[0023] The prosthetic device 1 is composed of a prosthetic body 10 that is shaped like a partition for a tooth 20 to be treated and has an opening 14 on an occlusal surface 12 of the tooth 20 to enable treatment of a root canal 32. The prosthetic body 10 is attached to the crown 22 or root 30 of the tooth 20 before or during treatment.

[0024] The shape of the prosthesis body 10 is such that it is attached to a part or the whole of the crown 22 of the tooth 20, replacing a part or the whole of the natural, non-artificial crown of a human being, to form the occlusal surface 12, and such a shape is referred to as a septum shape in this application. That is, the shape of the prosthesis body 10 may be annular as shown in the example in the figure, or may be deformed, for example, crescent-shaped in plan view, and the shape is determined depending on the situation of treatment.

[0025] Regarding the shape of the opening 14, when the prosthetic body 10 is toric as shown in the example of the figure, the opening 14 is in the shape of a hole serving as an access hole. However, when the prosthetic body 10 is in a crescent shape, the opening 14 is in the shape of a groove that allows treatment to the root canal 32 on the occlusal surface 12 of the tooth 20.

[0026] The material of the prosthetic body 10 constituting the prosthetic device 1 may be any material suitable for dentures that can be used for a long period of time, such as ceramic, resin, metal, and the like.

[0027] Next, a method for forming the prosthetic device 1 will be described. The method for forming the prosthetic device 1 is realized by a prosthetic device forming device. First, the tooth 20 and its surroundings before or during treatment are imaged by a scanning means. This scanning means may be a 3D camera, an intraoral scanner, a means for collecting CT data, or a combination of these. In addition, a dentist, a dental technician, or the like may modify the data imaged by the scanning means and create appropriate data as needed. Then, the shape of the prosthetic device 1 is formed based on the data imaged by the scanning means. The prosthetic forming means for forming the shape of the prosthetic device 1 may be any means that forms a conventional general prosthetic device.

[0028] Alternatively, instead of using a scanning means, an impression may be taken of the tooth 20 and its surroundings before or during treatment, and the shape of the prosthesis 1 may be formed based on the mold information obtained by taking the impression. Regardless of the method, the shape of the prosthesis 1 formed is as described above, and is a partition-like shape relative to the tooth 20, and has an opening 14 on the occlusal surface 12 of the tooth 20 that allows treatment to the root canal 32.

[0029] To explain the procedure for using the prosthetic device 1, in many cases, a treatment for treating caries or the like is first performed to remove the decayed portion of the tooth 20. Then, a scanning means is used or an impression is taken to specify the shape of the prosthetic device 1, and the prosthetic device 1 is formed.

[0030] Then, as shown in Fig. 2, for example, a fitting surface 24 for the prosthesis 1 is formed on the crown 22 of the tooth 20 to which the prosthesis 1 is to be attached, and the formed prosthesis 1 is attached thereon so that the fitting surface 16 forming a part of the inner peripheral surface of the prosthesis 1 fits in. Here, as shown in Fig. 3, even after the prosthesis 1 is attached to the tooth 20, treatment of the root canal 32 of the tooth 20 is possible through the opening 14. There may also be cases where the prostheses 1 are manufactured by connecting them together.

[0031] After the prosthetic device 1 is attached, treatment of the root canal 32 is performed, and when the treatment is completed, the opening 14 is closed with a material such as resin, thereby completing the treatment of the tooth 20. However, depending on the condition of the tooth 20, the shape of the prosthetic device 1 may be formed before treatment, and the prosthetic device 1 may be attached to the crown 22 or root 30 of the tooth 20 before treatment. Even if the prosthetic device 1 is attached before treatment, it is possible to treat the tooth 20 through the opening 14, and the opening 14 may be closed after the treatment is completed.

[0032] By using the prosthetic device 1 having such a configuration, it is possible to prevent changes in jaw position and tooth root fractures before and during treatment, and to reduce changes in the treatment plan. In addition, by using the prosthetic device 1 in the early stages of treatment, it is possible to prevent occlusion collapse.

[0033] The present invention allows various embodiments and modifications without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are considered to be within the scope of the present invention. [Industrial Applicability]

[0034] As described above, according to the present invention, it is possible to provide a prosthetic device, a prosthetic device forming device, and a method for forming a prosthetic device that can suppress changes in jaw position and root fractures before and during treatment and reduce changes to the treatment plan. [Explanation of symbols]

[0035] 1. Prosthetic device 10....Prosthesis body 12...occlusal surface 14...Open section 16 Mating surface 20 teeth 22...Tooth Crown 24 Mating surface 30...Tooth root 32...Root canal

Claims

1. In dental treatment, prosthetic devices a prosthetic body having a partition-like shape for a tooth to be treated and an opening on the occlusal surface of the tooth to allow treatment of the root canal; A prosthetic device characterized in that the prosthetic body is adapted to be attached to the crown or root of the tooth before or during treatment.

2. The prosthetic body is toric, 2. The prosthetic device according to claim 1, wherein the opening in the prosthetic body is an access hole that allows treatment to the root canal provided on the occlusal surface.

3. A prosthetic device forming device for forming the shape of a prosthetic device in dental treatment, A scanning means for imaging the teeth and their surroundings before or during treatment; a prosthesis forming means for forming a shape of the prosthesis device based on the data captured by the scanning means, A prosthesis forming device characterized in that the prosthesis, the shape of which is formed by the prosthesis forming means, is attached to the crown or root of the tooth before or during treatment, is a partition-like structure relative to the tooth, and has an opening on the occlusal surface of the tooth to allow treatment to the root canal.

4. The prosthesis device formed by the prosthesis forming means is annular, 4. The prosthesis forming apparatus of claim 3, wherein the opening in the prosthesis is an access hole that allows treatment to the root canals in the occlusal surface.

5. A method for forming a prosthetic device in dental treatment, comprising: Impressions of the teeth and surrounding area are taken before or during treatment. A method for forming a prosthetic device, which is characterized by forming a shape of the prosthetic device that is attached to the crown or root of the tooth before or during treatment based on the information of the mold obtained by taking the impression, in a partition-like shape relative to the tooth and having an opening on the occlusal surface of the tooth to allow treatment to the root canal.

6. A method for forming a prosthetic device in dental treatment, comprising: Taking images of the teeth and surrounding areas before or during treatment, A method for forming a prosthetic device, which is characterized by forming a shape of the prosthetic device that is attached to the crown or root of the tooth before or during treatment based on the imaged data, and that is shaped like a partition against the tooth and has an opening on the occlusal surface of the tooth to allow treatment to the root canal.

7. The prosthetic device formed is toric; 7. A method for forming a prosthetic device according to claim 5 or claim 6, wherein the opening in the prosthetic device is an access hole provided in the occlusal surface to allow treatment to the root canal.

Images