WO2020070925A1

WO2020070925A1 - Try-in denture, try-in denture production program, and denture production method

Info

Publication number: WO2020070925A1
Application number: PCT/JP2019/023961
Authority: WO
Inventors: 貴幸道井; 貴之上野
Original assignee: 株式会社ジーシー
Priority date: 2018-10-03
Filing date: 2019-06-17
Publication date: 2020-04-09
Also published as: JP6802927B2; JPWO2020070925A1

Abstract

The purpose of the invention is to provide a try-in denture such that occlusal adjustment is straightforward. The invention comprises a denture base portion and a tooth row portion and is equipped with an adjustment portion and a platform portion, which are separable from one another. The adjustment portion encompasses the entirety of the occlusion surface of the tooth row portion, is provided with a surface that is parallel to the occlusal plane, and, relative to the platform, is capable of a movement that is parallel to the occlusal plane, rotation in a plane that is parallel to the occlusal plane, or both the movement and the rotation. A cut-out portion is provided in such a manner as to straddle the adjustment portion and the platform portion.

Description

Trial denture, trial denture preparation program, and denture preparation method

The present disclosure relates to a trial denture, a trial denture production program, and a denture production method.

One of the well-known methods for producing a denture is a lost wax method, which involves, for example, the following steps.
First, a shape of a shape in a patient's mouth is taken using an impression material (so-called impression acquisition). Gypsum is poured into this and solidified to produce a gypsum model.
Next, the height of the upper and lower jaw dentures is secured on the obtained plaster model using wax, and artificial teeth are embedded in the wax to form wax dentures (so-called artificial tooth arrangement). After that, the wax dentures are buried in gypsum or the like and solidified, and a portion from which the wax flows out is formed. As a result, only the arranged artificial teeth remain, and a cavity is formed in the portion where the wax was present, so that the resin or the like flows into (fills in) the resin and hardens. Then, the denture can be obtained by breaking and removing the plaster.
As described above, the lost wax method has many steps, takes a long time to complete, and requires the skill of a dental technician to produce the lost wax method.

On the other hand, Patent Literature 1 discloses a technique for manufacturing a denture using CAD (computer aided design) and CAM (computer aided manufacturing). That is, the process from the design of the denture to the determination of the manufacturing process is handled as data using CAD and CAM, and finally, the denture is obtained by shaving using a numerical control (NC) machine tool based on the data.
According to this, the number of steps is smaller than that of the lost wax method, and the denture can be manufactured in a shorter time than before.

As described above, there are several methods for preparing a denture. In each case, first, an impression in the oral cavity and an occlusion (an impression of an oral mucosa for securing the position and stability of the denture) are taken. Occlusal acquisition for recording the upper and lower occlusal relations). In particular, in the case of a complete denture, since the impression acquisition is performed on the edentulous ridge, the accuracy of the obtained impression (particularly, the relationship between the jaws) is low. From such a viewpoint, trial production is performed in order to confirm proper occlusion of the denture during the production of the denture. Then, based on the results of this trial fitting, the relationship between the jaws and the position of the artificial tooth are adjusted to obtain a final denture. Patent Literature 1 also describes matters concerning trial fitting.

Japanese Patent No. 5932803

However, in the production of dentures using CAD and CAM, trial dentures, which are dentures for trial use, generally use a three-dimensional molding device or machine tool to form a crown (artificial tooth) portion and a denture base portion. Manufactured in one piece. Therefore, even when the positional relationship between the ridge and the artificial tooth is not appropriate or when adjusting the dentition position of the anterior tooth part with respect to the face, a great deal of effort is required, and it is difficult to correct the tooth row. As a result, there is a case where the accuracy of the finally obtained (completed) denture cannot be sufficiently improved and the process is started over from the beginning.

Therefore, an object of the present disclosure is to provide a trial fit denture that can easily and accurately adjust the occlusion (the relationship between the jaws and the position of the artificial tooth). Further, a program for producing the trial denture and a method for producing the denture are provided.

One aspect of the present disclosure is a trial denture for adjusting an occlusal state for producing a denture, having a denture base portion and a dentition portion, comprising a separable adjusting portion and a base portion, The part includes all of the occlusal surfaces of the dentition, has a surface parallel to the occlusal plane, is movable parallel to the occlusal plane relative to the base, is rotatable in a plane parallel to the occlusal plane, or This is a trial-fit tooth which can be moved and rotated, and is provided with a cutout portion so as to straddle the adjustment portion and the base portion.

In the above-described trial tooth, the adjusting portion may include a portion that engages with the base portion and restricts at least one of the movement and the rotation of the adjusting portion to a predetermined range.

Another aspect of the present disclosure is a program for producing a trial denture that adjusts the occlusal state for the production of a denture, from the data of the denture base and the dentition, separating the adjustment unit and the base, And, including a step of forming a notch that straddles the adjustment unit and the base, the adjustment unit includes all of the occlusal surfaces of the dentition unit, has a surface parallel to the occlusal plane, This is a trial denture making program that can move parallel to the occlusal plane, can rotate in a plane parallel to the occlusal plane, or can both move and rotate.

Another aspect of the present disclosure is a method of manufacturing a denture, including the step of producing a trial denture for adjusting an occlusal state, wherein the trial denture has a denture base and a row of teeth, and is separable. The adjusting part and the base are provided, and the adjusting part includes all the occlusal surfaces of the dentition part, has a surface parallel to the occlusal plane, and is movable in parallel to the occlusal plane with respect to the base, Rotation is possible in a plane parallel to the occlusal plane, or both movement and rotation are enabled, and the deviation of the notch provided so as to straddle the adjustment part and the base is directly or with respect to the notch. This is a method for manufacturing a denture in which the amount of movement and rotation is obtained by measuring an impression body by an acquired impression.

According to the present disclosure, it is possible to adjust the occlusion (inter jaw relation, artificial tooth position) as a whole dentition by moving and / or rotating the adjustment unit, and quantitatively obtain the adjustment amount. Therefore, it is possible to more easily and accurately correct the trial denture to the final denture.

FIG. 1 is a view of the trial fitting tooth 10 as viewed from the side. FIG. 2 is a front view of the trial tooth 10. FIG. 3 is a diagram of the upper trial denture 11 viewed from the side. FIG. 4 is an exploded view of the maxillary trial denture 11 viewed from the side. FIG. 5 is a plan view of the upper trial tooth 11 from the dentition 13 side. FIG. 6 is a view of the lower trial trial denture 21 as viewed from the side. FIG. 7 is an exploded view of the lower trial trial denture 21. FIG. 8 is a diagram illustrating a modification. FIG. 9 is another diagram illustrating a modification. FIG. 10 is a view of the upper trial denture 11 ′ viewed from the side. FIG. 11 is an exploded view of the maxillary trial denture 11 'viewed from the side. FIG. 12 is a view of the denture 30 as viewed from the side. FIG. 13 is a view of the denture 30 as viewed from the front. FIG. 14 is a plan view of the upper denture 31 viewed from the artificial tooth row 33 side. FIG. 15 is a plan view of the denture base 32 viewed from the side of the recess 32b. FIG. 16 is a diagram illustrating an appearance of the artificial tooth 33a. FIG. 17 is a block diagram conceptually showing the design apparatus 50. FIG. 18 is a diagram showing the flow of the method S1 for manufacturing a denture. FIG. 19 is a diagram showing the flow of the step S20 of designing the denture. FIG. 20 is a diagram showing the flow of the step S60 for producing a denture.

Hereinafter, each embodiment will be described with reference to the drawings. The present invention is not limited to these modes.

1 to 7 are views for explaining one embodiment, and are views showing trial fitting teeth 10. FIG. 1 is a diagram of the trial denture 10 viewed from the side, and FIG. 2 is a diagram of the trial denture 10 viewed from the front. 3 is a view of the upper trial tooth 11 from the side, FIG. 4 is an exploded view of the upper trial tooth 11 from the side, and FIG. 5 is a plan view of the upper trial tooth 11 from the dentition 13 side. FIG. FIG. 6 is a side view of the lower trial tooth 21 and FIG. 7 is an exploded view of the lower trial tooth 21 from the side.
Each drawing also shows an arrow indicating the direction (x, y, z) in the three-dimensional rectangular coordinate system. This coordinate system corresponds to the coordinate system on CAD.

The trial denture 10 is a denture that is produced for trial and used for adjusting the occlusal state, and a denture is produced based on the occlusal adjustment result by the trial denture 10.
In this embodiment, the trial denture 10 includes an upper trial denture 11 and a lower trial denture 21.

The upper trial denture 11 is a trial denture for the upper jaw, and has a denture base 12 and a dentition 13. Then, the upper trial tooth 11 is configured to be separable into a base portion 14 and an adjusting portion 15. The upper trial tooth 11 is provided with a notch 16 provided so as to straddle the base portion 14 and the adjusting portion 15.

The denture base 12 is a part having a shape corresponding to the part of the denture 30 that becomes the denture base 32 (see FIGS. 14 and 15). Accordingly, the denture base portion 12 has a tooth row portion 13 formed on one surface thereof, and a concave portion 12a corresponding to the shape of the crest ridge in the oral cavity is formed on the other surface as shown by a broken line. ing.

The dentition portion 13 is a portion having a shape corresponding to a portion that becomes the artificial dentition 33 (see FIG. 14) of the denture 30. Therefore, the tooth row portion 13 is configured by arranging a plurality of artificial tooth portions 13a corresponding to individual artificial teeth 33a in a dental arch shape. And the artificial tooth part 13a of the tooth row part 13 is provided with the occlusal surface 13b.

The denture base 12 and the dentition 13 may be integrally made of the same material (however, the base 14 and the adjustment unit 15 can be separated as described later). The trial denture 11 has only a problem with the external shape of the denture, and its material does not matter. The specific material is not particularly limited, but in addition to resin (including a photocurable resin that uses visible light or ultraviolet light as a light source for curing), thermoplastic resin, gypsum, ceramics, metal, Cellulose-based materials such as wax-containing resins, waxes and papers used only for temporary use, or materials obtained by combining two or more of these can be used.
The upper trial denture 11 can be produced by a three-dimensional modeling device or a machine tool (a cutting device or the like) that processes a final denture base.

Such a maxillary trial fitting tooth 11 is configured to be separable into a base 14 and an adjustment unit 15.
The base portion 14 includes most or all of the denture base portion 12 of the maxillary trial denture 11, and is formed by cutting out the adjustment portion 15 from the maxillary trial denture 11 and a portion that becomes an adjustment interval 11 a to be described later. 14a (see FIG. 4). The base 14 is configured not to include the occlusal surface 13b.
Further, of the notch 14a, a surface 14b (see FIG. 4), which is included in a sliding surface 15a (described later) of the adjustment unit 15 and which contacts a portion parallel to the occlusal plane 10a (see FIGS. 1 and 2), It is parallel to the occlusal plane 10a. The occlusal plane 10a is parallel to the xy plane. Here, the “occlusal plane” is defined by a term commonly used in the dental field.

The adjusting portion 15 includes at least the entire occlusal surface 13b of the upper trial tooth 11 and is in contact with the surface 14b of the notch 14a of the base portion 14 and at least partially has a sliding surface 15a having a surface parallel to the occlusal plane 10a. (See FIG. 4). Therefore, the adjustment unit 15 may include a part or the entirety of the dentition part 13, and may include a part of the denture base 12.
In addition, when the adjusting portion 15 is provided with another surface 15b which is different from the sliding surface 15a and is arranged to face the surface forming the cutout 14a of the base portion 14, the adjusting portion 15 contacts the base portion 14. An adjustment gap 11a is formed so as not to be caused. Thereby, the adjustment unit 15 can be adjusted by sliding, rotating, or both of them with respect to the base unit 14.

On the other hand, the lower trial tooth 21 is a lower trial tooth, and the lower trial tooth 21 can be considered in the same manner as the upper trial tooth 11. Accordingly, the same reference numerals as in the upper trial prosthesis 11 are given to the lower trial prosthesis 21 and the description thereof is omitted (see FIGS. 6 and 7).

The trial fitting teeth 10 configured as described above are combined as follows before adjustment, for example.
In the upper trial tooth 11, the adjusting unit 15 is arranged in the notch 14 a of the base 14. At this time, the sliding surface 15a of the adjustment unit 15 comes into contact with the surface 14b of the notch 14a. The other surface 15b is arranged so as not to contact the surface of the cutout portion 14a, thereby forming the adjustment gap 11a.

Furthermore, in the posture in which the base 14 and the adjustment unit 15 are combined as described above, the cutting is performed so as to straddle the base 14 and the adjustment unit 15 at least at one side surface (a surface extending in the z direction) of the maxillary trial tooth 11. A notch 16 is formed. The notch 16 is provided to have the following features.
The cutout portion 16 is provided so as to straddle the base portion 14 and the adjustment portion 15. Therefore, the notch 16 includes a base-side notch 16a and an adjustment-portion-side notch 16b. The notch 16 is formed so as not to cut the occlusal surface 13b. If the occlusal surface 13b is cut off, occlusal adjustment may be difficult. Similarly, it is preferable that the notch 16 has no notch in the concave portion 12a representing the shape of the mucous membrane in the oral cavity.
In the notch 16, a portion where the base side notch 16 a and the adjustment part side notch 16 b overlap before the occlusal adjustment is performed by at least one of the movement and rotation of the base 14 and the adjustment unit 15 as described later. Are located at the same position. That is, P ₁₄₁ which is one end point of the base side cutout portion 16a and P ₁₅₁ which is one end point of the adjustment portion side cutout portion 16b are at the same position (the same coordinates, see FIGS. 1 to 4). Similarly, other other endpoints in which P ₁₅₂ and the same position of the P ₁₄₂ is the end point adjusting unit side cutout portion 16b of the base side hollow portion 16a is in the (same coordinates, see FIG. 2).

In addition, it is preferable that the notch 16 be provided so that the end points P ₁₄₁ , P ₁₄₂ , P ₁₅₁ , and P ₁₅₂ can be seen from the outside of the trial fitting tooth 10. This makes it easier to measure the deviation of the endpoint as described below. Further, in the present embodiment, one notch 16 is provided on the front tooth side, but the present invention is not limited to this, and one notch 16 may be provided instead on the back tooth side, or two or more places may be provided at different positions. The greater the number provided, the more accurate the measurement of the adjustment amount can be. When notches are provided at two or more different locations, it is preferable that the notches be located as far apart as possible. This can also increase the measurement accuracy of the adjustment amount.

Also, as shown in the modified examples in FIGS. 8 and 9, the shape of the base portion is reduced as much as possible without being cut out, and the cut-out portion 16 has a rectangular cross section so as to leave the shape of the final denture. Is also good.

Similarly, the adjusting part 15 is also arranged in the notch part 14 a of the base part 14 of the lower trial side denture 21. At this time, the sliding surface 15a of the adjustment unit 15 comes into contact with the surface 14b of the notch 14a. The other surface 15b is arranged so as not to contact the surface of the cutout portion 14a, thereby forming the adjustment gap 11a. Similarly, a notch 16 is provided.

The upper trial denture 11 and the lower trial denture 21 are arranged so that their occlusal surfaces 13a face each other to form the trial denture 10 (see FIGS. 1, 2, 8, and 9).

In the trial denture 10 as described above, as shown by A in FIG. 1 and B in FIG. 2, the adjustment unit 15 can be moved in the x direction and the y direction that are directions parallel to the occlusal plane 10a. As shown by C in FIG. 5, the adjusting unit 15 can be rotated in the xy plane which is parallel to the occlusal plane 10a among the sliding surfaces 15a.
In this way, by moving and / or rotating the adjusting unit 15, the occlusion between the upper trial tooth 11 and the lower trial tooth 21 can be adjusted. Therefore, according to the trial tooth 10, since the entire dentition is moved and rotated, the upper and lower jaw pairing relationship of the individual artificial teeth 13a is not changed, so that the adjustment of the individual artificial teeth 13a is unnecessary. This only corrects the relationship between the unsuitable jaw adjustment portion 15 and the base portion 14, and can adjust the occlusion by a very easy method.
In addition, the occlusal surface formed on the artificial tooth is often designed to have an appropriate shape from the beginning. Unnecessary shaving when applying a denture by the method is not desirable in terms of oral functions such as mastication. By using the trial denture of this form, the possibility of impairing the mastication function due to the occlusal surface formed on the artificial tooth is reduced, so that the patient's jaw movement while maintaining the good shape of the occlusal surface in the denture is maintained An adjusted occlusion adjustment is performed.

Then, the trial tooth 10 can quantitatively grasp at least one of the movement and the rotation in the x direction and the y direction. That is, before the movement or rotation (before adjustment), the movement for adjustment is performed on P ₁₄₁ and P ₁₅₁ , and P ₁₄₂ and P ₁₅₂ , which are the ends of the cutout portions whose coordinates match. , [Delta] x ₁ and [Delta] y ₁ is the x-coordinate and the deviation distance of the y-coordinate of _{P 141} and _{P 151} which definitive after rotation, as well as, the x coordinate of the mobile, definitive after rotation _{P 142} and _{P 152} for adjustment By measuring Δx ₂ and Δy ₂ , which are the distances between the displacement and the y coordinate, it is possible to quantitatively grasp the amount of movement or rotation.
As a result, a denture with higher precision can be designed.

In the present embodiment, both the upper trial tooth 11 and the lower trial tooth 21 are divided into the base portion 14 and the adjusting portion 15, but both are not necessarily divided, and the upper trial tooth is not necessarily divided. It suffices that at least one of 11 and the lower jaw side trial denture 21 is divided into the base 14 and the adjustment unit 15.
Further, the adjusting unit 15 does not necessarily have to have all the artificial teeth as one adjusting unit. For example, even if the adjusting unit 15 is divided into three parts, a molar part (right side, left side) and a front tooth part (between two canines). good. That is, it can be arbitrarily divided into a plurality of adjustment units.

Further, the sliding surface 15a of the adjusting portion 15 may be at least partially parallel to the occlusal plane 10a and may overlap with the surface 14b, and irregularities may be formed in other portions. Thereby, the movement and rotation of the adjusting unit 15 can be regulated, too much movement and too much rotation can be prevented, and the ease of occlusal adjustment can be improved.
For example, FIGS. 10 and 11 show a modified example of an upper-side trial denture 11 ′. The upper trial tooth 11 ′ has a projection 15 b ′ on its sliding surface 15 a ′, and a recess 14 c ′ is arranged at a position corresponding to the projection 15 b ′ in the notch 14 a ′ of the base 14. The projection 15b 'is arranged so as to be inserted into the recess 14c'. At this time, the size of the concave portion 14c 'is configured to be larger than the size of the protrusion 15b'.
According to the maxillary trial tooth 11 ′ having such a configuration, when the adjusting portion 15 ′ is moved and rotated to adjust the occlusal state, the movement and rotation are caused by the movement and rotation of the projection 15b ′ within the concave portion 14c ′. Since the range is limited to the allowable range, movement and rotation beyond the assumed range can be prevented, and the work can be facilitated.

Next, a method of manufacturing the denture 30 using the trial denture 10 will be described. In addition, in this, the program for manufacturing the trial fitting denture 10 is also described.

FIG. 12 is a side view of the denture 30, FIG. 13 is a front view of the denture 30, and FIG. 14 is a plan view of the upper denture 31 of the denture 30 viewed from the tooth row 33 side. Such dentures 30 are arranged on the lower and upper jaw sides of the patient's mouth to artificially supplement the missing natural teeth. As can be seen from FIGS. 12 to 14, the denture 30 includes an upper denture 31 and a lower denture 41. Although the lower jaw 41 has a different jaw, it can be considered in the same manner as the upper denture 31. Therefore, the constituent members are denoted by the same reference numerals and description thereof is omitted.

As can be seen from FIGS. 12 to 14, the denture 30 has an upper denture 31 and a lower denture 41 each having an artificial tooth row 33 in which a denture base 32 and a plurality of artificial teeth 33 a are arranged. Have been. FIG. 15 shows the appearance of a denture base 32, and FIG. 16 shows the appearance of an artificial tooth 33a according to one example.

The denture base 32 is a member having a function of holding the artificial tooth 33a in a predetermined position and stably mounting the denture 30 on the oral mucosa. In the present embodiment, as can be seen from FIG. 15, the artificial teeth 33a are provided with a bank-shaped raised ridge 32a as a part where the artificial teeth 33a are arranged, and one end of the artificial tooth 33a is inserted into the top of the ridge 32a. There is provided a concave portion 32b to which is fixed.
Since the denture base 32 is manufactured by cutting as described later, it is preferable to use a hard material such as a hard resin, a metal, or a ceramic sintered body.

The artificial tooth 33a is an artificial tooth made to have the function of the natural tooth in place of the lost natural tooth. The artificial tooth 33a is held by inserting one end thereof into the concave portion 32b of the denture base 32 and fixing the artificial tooth 33a with an adhesive. Thus, the plurality of artificial teeth 33a are arranged in an arcuate manner like a dentition to form the artificial dentition 33, which can function as a natural tooth.

Here, a known material used for an artificial tooth can be applied to the artificial tooth 33a. This can include, for example, ceramics, resins, rigid resins, and metals.
In addition, as a material for bonding the artificial tooth 33a to the denture base 32, a known material can be used. For example, known materials such as an instant polymerization resin, a gum color resin, a denture base resin, and an epoxy adhesive may be used. Industrial adhesives, or a combination of at least two of them, and the like, may be used.

Here, means for preventing the artificial tooth 33a from rotating when placed on the denture base 32 may be provided. For example, an embodiment in which a non-circular protrusion is provided on the artificial tooth 33a and a hole for inserting the protrusion is provided on the concave portion 32b side can be given.

Next, a method of manufacturing the denture 30 of the above embodiment will be described.

FIG. 17 is a block diagram conceptually showing a configuration included in the denture designing device 50 according to one embodiment. The denture design device 50 (hereinafter, may be referred to as “design device 50”) includes an input unit 51, an arithmetic unit 52, and a display unit 58. The arithmetic unit 52 includes an arithmetic unit 53, a RAM 54, a storage unit 55, a receiving unit 56, and an output unit 57. The input unit 51 includes a keyboard 51a, a mouse 51b, and an external storage device 51c functioning as one of storage media.

The calculation means 53 is constituted by a so-called CPU (central operator), is connected to each of the above-described components, and is a means capable of controlling them. Also, the arithmetic means 53 executes various programs 55a stored in the storage means 55 or the like functioning as a storage medium, and performs arithmetic as means for generating various data and selecting data described later based on the programs. It is.

The RAM 54 is a component that functions as a work area for the calculation unit 53 and a storage unit for temporary data. The RAM 54 can be composed of an SRAM, a DRAM, a flash memory, or the like, and is similar to a known RAM.

The storage unit 55 is a member that functions as a storage medium that stores programs and data that are the basis of various calculations. The storage unit 55 may be capable of storing intermediate and final various results obtained by executing the program. More specifically, the storage unit 55 stores (saves) a program 55a, an artificial tooth shape database 55b, and a denture base shape database 55c. Further, other information may be stored together.

The program 55a is a program necessary for operating the design device 50, and is not particularly limited.

The artificial tooth shape database 55b is a database in which information such as the shape of the artificial tooth is stored. The type of artificial tooth shape stored in the database is not particularly limited, but a plurality of artificial teeth included in the dental arch form one set, and are stored as data in a state where the upper and lower dental arches are engaged. It may be a mode that has been done. This data may be configured so that it can be handled by several divided units including several artificial teeth in addition to each artificial tooth.
It is preferable that such a set of artificial teeth is prepared with a plurality of variations for adjusting to the characteristics of the patient such as “sex” and “physique”.
In addition, the artificial tooth shape database 55b includes the form of the means for regulating the rotation described above.

The denture base shape database 55c is a database in which information such as the shape related to the denture base is stored. The form of the data relating to the denture base stored in the database is not particularly limited. As for variations, it is preferable that there are three to four types of size data in combination according to the size of the artificial tooth.
The denture base shape database 55c may include a form of means for restricting rotation when an artificial tooth is placed on the denture base as described above.

The receiving means 56 is a component member having a function of appropriately taking in information from the outside into the arithmetic device 52, and is connected to the input means 51. So-called input ports, input connectors and the like are also included in this.

The output unit 57 is a component having a function of appropriately outputting information to be output to the outside of the obtained results, and a display unit 58 such as a monitor and various devices are connected thereto. So-called output ports, output connectors and the like are also included in this.

The input device 51 includes, for example, a keyboard 51a, a mouse 51b, an external storage device 51c, and the like. Known keyboard 51a and mouse 51b can be used, and description thereof is omitted.
The external storage device 51c is a known externally connectable storage means, and also functions as a storage medium. There is no particular limitation here, and various necessary programs and data can be stored. For example, programs and data similar to those of the storage unit 55 described above may be stored here. The external storage device 51c may store impression data and occlusion-related data that serve as the basis for data generation by the arithmetic device 52.
A known device can be used as the external storage device 51c. This includes, for example, CD-ROM and CD-ROM drives, DVD and DVD drives, hard disks, various memories, and the like.

In addition, information may be provided to the arithmetic device 52 via the receiving unit 56 by a network or communication. Similarly, information may be transmitted to an external device (for example, an NC machine tool) via the output unit 57 via a network or communication.

Next, a method S1 (sometimes described as “manufacturing method S1”) of manufacturing the trial fitting denture 10 and the denture 30 using the design device 50 will be described. Here, an example using the design device 50 will be described for the sake of simplicity, but the manufacturing method is not limited to this, and other devices are used as long as the method includes the following purpose. You can also.

FIG. 18 shows the flow of the manufacturing method S1. As can be seen, the manufacturing method S1 includes the impression digitizing step S10, the trial denture design step S20, the trial denture production step S30, the trial denture adjustment step S40, the denture design S50, and the denture design. The manufacturing process S60 is included. Hereinafter, each step will be described.

Step S10 is a step of obtaining shape data and occlusal CAD data from the obtained impression. The impression itself is obtained by a known method, and the mucosal surface information of the patient can be obtained from the impression by measuring a plaster model, an impression body, and the like.

The method of obtaining CAD data can be performed using a known device, for example, a three-dimensional optical scanner. On the other hand, occlusal relation data is obtained by connecting the upper body impression body and the lower jaw impression body directly in the oral cavity with an occlusal acquisition material, or by performing occlusal acquisition for shifting to an articulator. It can be obtained by three-dimensionally measuring an occlusal state or a reproduction of an ideal jaw position.

In step S20, the shape of the trial denture is designed based on the information on the mucosal surface based on the patient obtained in step S10 and the database stored in the design device 50. Each operation performed in step S20 in the present embodiment is performed by the design device 50. That is, the operation is performed by the arithmetic means 53 performing an arithmetic operation in accordance with the program 55a stored in the storage device 55 provided in the design apparatus 50.
FIG. 19 shows the flow of the process S20. As can be seen, the step S20 includes a step S21 of acquiring impression data, a step S22 of data calling and arrangement position adjustment, and a shape design S23 of trial fitting teeth.

Step S21 is a step in which information on the impression converted into data in step S10 is acquired and taken into the design device 50. The capture is stored in the storage device 55 via the receiving means 56 of the design device 50.

Step S22 is a step of calling information from the database and arranging the artificial teeth on the data on the design device 50. That is, based on the information acquired so far, the artificial tooth data suitable for the dental arch is called from the database stored in the storage unit 55 of the design device 50. Then, after arranging this at the approximate position on the ridge on the data, the position is finely adjusted.

では In step S23, the shape of the trial tooth 10 is produced based on the shape determined in step S22. Specifically, as in the above-described trial denture 10, the base portion 14 and the adjusting portion 15 are divided and the notch portion 16 is formed for at least one of the upper trial tooth 11 and the lower trial tooth 21. .

Regarding the position of division between the base portion 14 and the adjusting portion 15, the position including all the occlusal surfaces 13 b and where the ridge on the mucosal surface does not interfere with the adjusting portion 15 is used as a dividing reference for the sliding surface 15 a, The last part including at least the occlusal surface 13b of the tooth portion 13a is used as a division reference for the other surface 15b.
The sliding surface 15a is a surface that performs movement, rotation, or both, and is therefore preferably parallel to the occlusal plane 10a. At this time, when the sliding surface 15a is in the vicinity of the occlusal surface 13b, there is no contact with the adjacent teeth, and it is difficult to obtain a block of the adjustment unit. Therefore, the sliding surface 15a satisfies the division criterion. It is preferable to select a position farther from the occlusal plane 10a among the positions.
On the other hand, for the other surface 15b, the adjustment gap 11a as described above may be set in the range of 2 mm or more and 3 mm or less, assuming that the adjustment unit 15 is moved backward. When the adjustment gap is not provided, the positional relationship is corrected by cutting the adjustment unit 15 or the base 14.

(4) The notch 16 is formed on the data on the basis of the above conditions.

演算 Each operation performed in step S20 in the present embodiment is performed by the design device 50. That is, the calculation means 53 performs a calculation in accordance with the program 55a stored in the storage device 55 provided in the design device 50, so that the data is advanced as data.

In step S30, a trial tooth is manufactured based on the shape data of the trial tooth determined in step S20. The processing data for the trial denture output in the step S30 is received, and the shape is laminated or cut out by a three-dimensional modeling device or a machine tool, and these are combined to complete the trial denture 10. That is, the command data for the three-dimensional modeling device or the machine tool output in the step S30 is received, and based on this, the three-dimensional modeling device or the machine tool produces the trial tooth 10 by lamination or cutting. Here, the three-dimensional modeling apparatus and the machine tool can use a well-known thing, and it is not specifically limited, A well-known three-dimensional modeling apparatus and a NC machine tool can be used.
Each operation performed in step S30 in the present embodiment is performed by the design device 50. That is, the calculation is performed by the calculation means 53 in accordance with the program 55a stored in the storage device 55 provided in the design device 50, and the processing is performed by controlling the three-dimensional modeling device and the machine tool.

In step S40, the prepared trial denture 10 is arranged in the oral cavity of the patient, and the occlusal state is adjusted. As described above, the adjustment of the occlusal state can be performed by moving and rotating the adjustment unit 15 with respect to the base 14 or by combining both. Then, the adjustment result is obtained as data. The data of the adjustment result is, for example, the movement amount and the rotation amount of the adjustment unit 15.
Specifically, at least one of the relative movement and the rotation of the base 14 and the adjustment unit 15 is performed, and both are fixed in an appropriate posture. The fixing method is not particularly limited, and examples thereof include a dental resin material (room temperature polymerized resin and photopolymerized resin material), an adhesive, an adhesive, an adhesive tape, and the like.

Next, the displacement between the base side cutout portion 16a and the adjustment side cutout portion 16b in the cutout portion 16 is measured for the trial fitting tooth 10 thus fixed. That is, the shifts Δx ₁ and Δy ₁ , which are the distances between the X coordinate and the y coordinate between P ₁₄₁ and P ₁₅₁ after the movement or rotation for adjustment, and the P after the movement and / or rotation for adjustment. _The shifts Δx ₂ and Δy ₂ , which are the distance between the x coordinate and the y coordinate between ₁₄₂ and P ₁₅₂ , are measured.
As a measuring method, a method of directly measuring with a caliper or the like, a method of acquiring a part of shape data with a three-dimensional optical scanner, and the like can be considered, and any of these methods can be used.
In addition, here, an example of directly measuring the notch portion has been described.In addition, for the notch portion in a state where a shift has occurred, a notch portion is obtained using a dental silicone impression material, and an impression is obtained. The displacement may be measured by measuring the impression body.
Note that the fixed trial fitting denture after the deviation amount is measured can be used by the patient as a temporary denture.

In step S50, the movement amount and the rotation amount of the adjustment unit 15 obtained by the above adjustment are taken in, and the denture shape is designed on the data based on these. Thereby, the denture shape is determined.
Then, in step S50, the artificial tooth data is deleted from the determined denture data, and the processing data for denture base cutting is output to step S60 (machine tool) for producing a denture.
Each operation performed in step S50 in the present embodiment is performed by the design device 50. That is, the operation is performed by the arithmetic means 53 performing an arithmetic operation in accordance with the program 55a stored in the storage device 55 provided in the design apparatus 50.

The step S60 is a step of receiving the processing data for the denture output from the step S50, cutting out the shape with a machine tool, and combining them to finish the denture 30.
FIG. 20 shows the flow of step S60. As can be seen from FIG. 20, the step S60 includes a cutting step S61, a step of attaching an artificial tooth to a denture base S62, and a step of finish polishing S63.

Step S61 is a step in which the machine tool cuts the denture base 32 by cutting based on the command data to the machine tool output in step S50 and receiving the command data. Here, a known machine tool can be used, and there is no particular limitation, and a known NC machine tool can be used. Since the denture base material used here is formed of a hard material such as a hard resin, a metal, or a ceramic, cutting can be performed appropriately and accurately.

Step S62 is a step of attaching the artificial tooth 33a to the denture base 32 obtained in Step S61. The artificial tooth 33a is arranged in the concave portion 32b of the denture base 32 and fixed with an adhesive.

In step S63, the denture obtained in step S62 is subjected to finish polishing to finally obtain the denture 30.

As described above, according to the manufacturing method S1, the occlusal adjustment can be performed accurately without taking time and effort.

Reference Signs List 10 trial denture 10a occlusal plane 11 maxillary trial denture 11a adjustment gap 12 denture base 13 dentition part 13a artificial tooth part 13b occlusal surface 14 base 14a notch 15 adjustment part 15a sliding surface 16 notch 30 denture 32 denture Floor 32a embankment 32b recess 33 artificial tooth row 33a artificial tooth

Claims

A trial denture that adjusts the occlusal state for the production of a denture,
It has a denture base and a dentition,
It has an adjustment unit and a base so that it can be separated,
The adjusting unit includes a surface parallel to the occlusal plane, including all of the occlusal surfaces of the dentition, and is movable parallel to the occlusal plane with respect to the base, a surface parallel to the occlusal plane. Rotatable within, or both said movement and said rotation are enabled,
A trial tooth having a notch provided so as to straddle the adjusting part and the base.
The trial fitting tooth according to claim 1, wherein the adjusting portion is provided with a portion that engages with the base portion and limits at least one of the movement and the rotation to a predetermined range.
A program for preparing a trial denture for adjusting an occlusal state for the preparation of a denture,
From the data of the denture base and the dentition, the step of separating the adjustment unit and the base, and the step of forming a cutout straddling the adjustment unit and the base,
The adjusting unit includes a surface parallel to the occlusal plane, including all of the occlusal surfaces of the dentition, and is movable parallel to the occlusal plane with respect to the base, a surface parallel to the occlusal plane. A trial tooth preparation program which is rotatable within the apparatus, or is capable of both the movement and the rotation.
A method of manufacturing a denture,
Including a step of preparing a trial denture for adjusting the occlusal state,
The trial denture is
It has a denture base and a dentition,
It has an adjustment unit and a base so that it can be separated,
The adjusting unit includes a surface parallel to the occlusal plane, including all of the occlusal surfaces of the dentition, and is movable parallel to the occlusal plane with respect to the base, a surface parallel to the occlusal plane. Rotatable within, or both said movement and said rotation are enabled,
The displacement of the cutout portion provided so as to straddle the adjustment portion and the base portion, or directly, or by measuring the impression body by the impression obtained for the cutout portion, the movement, and, of the rotation A method for manufacturing dentures that obtains quantity.