Mill block kit for full denture

Abstract

Provided is a mill block kit for a full denture enabling, in full denture manufacture in which a CAD / CAM system is used, efficient manufacture of a full denture in a cutting machine.　The mill block kit for a full denture includes a mill block body for the upper jaw or the lower jaw, and a holder for holding the mill block body. The mill block body includes: an artificial tooth row part for the upper jaw or the lower jaw made of an artificial tooth material; and a cutting part for a denture base for the upper jaw or the lower jaw having a substantially full denture base shape, for fixing the artificial tooth row part. A plurality of holding member connection ports are provided on the outer periphery of the cutting part for a denture base of the mill block body for the upper jaw or the lower jaw. The holder is provided with: an outer peripheral side base body part disposed around the mill block body for the upper jaw or the lower jaw; and a support member that is connected to the plurality of holding member connection ports, fixed to the mill block body for the upper jaw or the lower jaw, and connected to the outer peripheral side base body part, and thereby supports the mill block body.

Description

Complete denture mill block kit

[0001] The present invention relates to a denture mill block kit used for fabricating complete dentures using a CAD / CAM system.

[0002] In recent years, the technology of manufacturing dental prosthetics such as dentures, crowns, and bridges by using CAD / CAM (Computer-Aided Design and Computer-Aided Manufacturing) systems to cut and process dental mill blocks has attracted attention in the dental field.

[0003] Here, a dental mill block refers to a workpiece made of resin, hybrid resin, ceramic, etc., that can be attached to a cutting machine, and is sometimes called a milling block, block, mill blank, or blank.

[0004] As for the shape of mill blocks used in dental machining, solid blocks formed into rectangular or cylindrical shapes, or solid discs formed into plate or plate shapes are generally known. Regarding mill blocks used in dental machining for the fabrication of complete denture bases, disc-shaped (circular or low-height cylindrical) blocks with a predetermined diameter and thickness, and having a predetermined structure on their outer circumference used for attachment to a cutting machine (hereinafter also referred to as the "disk-side holding structure or disc-side holding mechanism"), known as "standard discs," are widely used commercially (as semi-standardized products) (see Non-Patent Documents 1-2).

[0005] On the other hand, cutting machines are generally equipped with disc holders (dedicated to each cutting machine) that can accommodate "standard discs." While the specific shape of the disc holder and the specific holding mechanism for holding the standard disc vary from machine to machine, "standard discs" typically have a disc-side holding structure (mechanism) on their outer circumference that is designed to hold the disc in the disc holder, and they all share the common feature of having a "standard disc holding mechanism" that can hold the standard disc by utilizing this disc-side holding structure (mechanism) (for example, by fitting or engaging). Although there is more than one type of disc-side holding structure (mechanism), the types are limited, so a cutting machine can accommodate many "standard discs" by providing one or two disc holders.

[0006] Incidentally, when fabricating complete dentures using a CAD / CAM system, it is common practice to fix artificial teeth (rows) to a complete denture base fabricated by milling a denture base mill block using the CAD / CAM system (see Patent Document 1). However, a mill block in which the part that becomes the artificial tooth is integrated with the denture base mill block has also been proposed (see Patent Documents 2 and 3).

[0007] Specifically, Patent Document 2 discloses a milling block (1) for making a partial or complete denture for a patient, comprising: a first region having a denture base (3) to be milled according to the shape of the patient's jaw; and a second region in which synthetically formed teeth (5) that do not require further post-processing are arranged on the denture base (3) based on the patient's occlusal position.

[0008] Furthermore, Patent Document 3 describes a structure comprising: an anterior tooth cuttable member having a structure in which a cuttable part for a denture base made of denture base material, a cuttable part for an artificial tooth made of artificial tooth material, and a fixing part for fixing the cuttable part for the artificial tooth to the cuttable part for the denture base is connected; and a molar member having a structure in which an exposed part made of artificial tooth material, having the shape of a standard molar, and substantially requiring no cutting, and a fixing part for fixing the exposed part to the cuttable part for the denture base is connected, wherein the anterior tooth cuttable member and the molar member are arranged to constitute a standard arrangement pattern of corresponding teeth, and the cuttable part for the denture base is A mill blank for dentures fixed to a machining section is disclosed, characterized in that the shape of the part to be machined for artificial teeth in the anterior tooth machining section is such that the thickness, defined as the distance between its labial surface and lingual surface, is greater than the thickness of the corresponding standard anterior tooth, and the width, defined as the distance between its mesial surface and distal surface, is substantially the same as the width of the standard anterior tooth, and the fixing section of the anterior tooth machining section is connected to the anterior tooth machining section so as not to be exposed on the surface when the part to be machined for artificial teeth and the part to be machined for the denture base in the anterior tooth machining section are machined.

[0009] International Publication No. 2018 / 159507 Brochure, Patent No. 6712439, International Publication No. 2023 / 074353 Brochure, Patent No. 7458651

[0010] YAMAKIN Corporation, KZR-CAD Denture PC & Provi PC product brochure, [Accessed August 9, 2024], Internet <URL: https: / / www.yamakin-gold.co.jp / technical_support / webrequest / pdf / kzr-cad_pc.pdf> Zilkonzahn Corporation, Millable materials, [Accessed August 9, 2024], Internet <URL: https: / / zirkonzahn.com / en / products / millable-materials>

[0011] The milling block disclosed in Patent Document 2 and the denture mill blank disclosed in Patent Document 3 have a second region that does not require cutting for forming the artificial teeth (rows) of the denture, and a cut-to-machine portion for artificial teeth and a molar member that can reduce the amount of cutting, which are fixed in advance to the first region that becomes the denture base or the cut-to-machine portion for the denture base by cutting. Therefore, by using these, it is possible to reduce the time and effort required to manufacture a complete denture.

[0012] However, the first region of the dental mill block or the part to be cut for the denture base, as specifically shown in Patent Documents 2 and 3, contains a large amount of unused (wasted) material. Therefore, there was room for improvement in terms of effective utilization of denture base material and cutting time.

[0013] Furthermore, the dental mill block specifically shown in Patent Document 3 has a disc-shaped workpiece for the denture base, and therefore can be attached to a milling machine using a disc holder for a predetermined disc-shaped mill block. However, regarding the milling block disclosed in Patent Document 2, Patent Document 2 does not specifically explain how to attach it to a milling machine, and the shape of the first region is not disc-shaped, so it seems that a separate dedicated holder would need to be prepared in order to set it on a milling machine.

[0014] The present invention aims to provide a mill block kit for complete dentures that enables the efficient fabrication of complete dentures using a milling machine in the fabrication of complete dentures using a CAD / CAM system. Furthermore, it is preferable to provide a kit that allows for easy attachment and detachment of specially shaped mill blocks of various sizes and shapes to the milling machine.

[0015] To solve the above problems, according to a first aspect of the present invention, a mill block kit for complete dentures for manufacturing dentures using a milling machine and a CAD / CAM system, wherein the mill block kit for complete dentures comprises a mill block body for the maxilla or mandible to be milled, and a holder for holding the mill block body, wherein the mill block body comprises an artificial dentition portion for the maxilla or mandible made of artificial tooth material, and a portion for the maxilla or mandible made of denture base material that is substantially in the shape of a complete denture base and fixes the artificial dentition portion, wherein a plurality of holder member connection ports are provided on the outer circumference of the portion for the maxilla or mandible made of the mill block body for the maxilla or mandible, and the holder comprises an outer peripheral base portion arranged around the mill block body for the maxilla or mandible, A mill block kit for complete dentures is provided, comprising: a support member which is connected to a plurality of retaining member connection ports on the mill block body and fixed to the upper or lower mill block body, and which is connected to the outer peripheral base portion to support the mill block body.

[0016] According to the present invention, a mill block kit for complete dentures can be provided that enables the efficient fabrication of complete dentures using a cutting machine in the fabrication of complete dentures using a CAD / CAM system.

[0017] The first embodiment of the present invention is shown in Figure 1, where (a) is a plan view of a typical standard disc 1a having a protrusion on its outer circumference, and (b) is a side view of the standard disc 1a. The first embodiment of the present invention is shown in Figure 1, where (a) is a plan view of a typical standard disc 1b having a recess on its outer circumference, and (b) is a side view of the standard disc 1b. The first embodiment of the present invention is shown in Figure 1, where (a) is a plan view of a typical standard disc 1b having a recess on its outer circumference, and (b) is a side view of the standard disc 1b. The second embodiment of the present invention is shown in Figure 1, where (a) is a front view of the standard disc 1b, (b) is a side view and cross-sectional view of the standard disc 1b, and (c) is a schematic cross-sectional view when the standard disc 1a is held in the standard disc 1b. The third embodiment of the present invention is shown in Figure 1, where (a) is a front view of the standard disc 1b, and (b) is a side view and cross-sectional view of the standard disc 1b. The fourth embodiment of the present invention is shown in Figure 1, where (a) is a front view of the standard disc 1b, and (b) is a side view and cross-sectional view of the standard disc 1b. The second embodiment of the present invention is shown in Figure 1, where (a) is a plan view of a typical standard disc 1a having a protrusion on its outer circumference, and (b) is a side view of the standard disc 1a. The second embodiment of the present invention is shown in Figure 1, where (a) is a plan view of a typical standard disc 1b Figure 2 is a schematic diagram of a full-circumference compatible disc holder 4c for holding the standard disc 1b shown in Figure 2, where (a) is a front view of the full-circumference compatible disc holder 4c and (b) is a schematic cross-sectional view when the standard disc 1b is held in the full-circumference compatible disc holder 4c. This is a perspective view of the reference denture 10, where (a) shows the upper reference denture 10A of the reference denture 10 and (b) shows the lower reference denture 10B of the reference denture 10. (a) is a diagram for explaining the lengths of each part that have a suitable planar shape based on the length of line segment PQ when the upper reference denture 10A is viewed from above, and (b) is a diagram for explaining the lengths of each part that have a suitable planar shape based on the length of line segment pq when the lower reference denture 10B is viewed from above. This is a cross-sectional view of a complete denture (full denture) type denture with a canine tooth structure, fabricated using a standard denture 10, where (a) shows the maxillary denture 100A and (b) shows the mandibular denture 100B. This is a plan view showing the shape of the mill block body 20 according to this embodiment, where (a) shows the maxillary mill block body 20A with a convex retaining member connection port formed on its outer circumference, and (b) shows the mandibular mill block body 20B, which similarly has a convex retaining member connection port formed on its outer circumference.This diagram illustrates the shape of a suitable maxillary mill block body 20A (excluding the retaining member connection port 23), where (a) is a plan view as seen from the dentition side, (b) is a projection of the denture base from the mucosal side (the side without a dentition), (c) is a cross-section in the anterior-posterior direction including the space between the left and right artificial teeth (number 1), (d) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 5), and (e) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 7). This diagram illustrates the shape of a suitable mandibular mill block body 20B, where (a) is a plan view as seen from the dentition side, (b) is a projection view of the denture base from the mucosal side (the side without a dentition), (c) is a cross-section in the anterior-posterior direction including the space between the left and right artificial teeth (number 1), (d) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 3), (e) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 5), and (f) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 7). (a) is a diagram showing the state in which the upper jaw mill block body 20A is fixed to a holding member 30a that can be set in a disc holder 4 having a standard disc holding mechanism 6 consisting of a recess 6a as shown in Figure 3, (b) is a diagram showing the state in which the upper jaw mill block body 20A is fixed to a holding member 30b, and (c) is a diagram showing the state in which the upper jaw mill block body 20A is fixed to a holding member 30c that can be set in a disc holder 4 having a standard disc holding mechanism 6 consisting of a protrusion 6b as shown in Figure 5. The diagram schematically shows the state in which a support member 61A is attached to a dedicated holder 60A according to a second embodiment of the present invention, with (a) being a front view, (b) being a side view, and (c) being a cross-sectional view. The diagram schematically shows the state in which a support member 61B is attached to a dedicated holder 60B, with (a) being a front view, (b) being a side view, and (c) being a cross-sectional view. (a) shows the mill block body 20 attached to the dedicated holder 60 shown in Figure 13 via a support member 61, (b) shows the support member 61 with a recess formed at the other end 61b, and (c) shows the support member 61 with a protrusion formed at the other end 61b.(a) and (b) show the state in which the other end 61b of the support member 61 shown in Figure 15(b) is fitted with the protrusion which is the end region 23a of the retaining member connection port 23, and (c) shows the state in which the other end 61b of the support member 61 shown in Figure 15(c) is fitted with the recess which is the end region 23a of the retaining member connection port 23. (a) shows the state in which the mill block body 20 is attached to the dedicated holder 60 shown in Figure 13 via a support member 61 having a male screw formed thereon, (b) shows the support member 61 having a male screw formed thereon and a recess formed at the other end 61b, and (c) shows the support member 61 having a male screw formed thereon and a protrusion formed at the other end 61b. (a) shows the state in which the male screw at the other end 61b of the support member 61 shown in Figure 17(b) is screwed into the female screw at the end region 23a of the retaining member connection port 23, and (c) shows the state in which the male screw at the end region 23a of the retaining member connection port 23 is screwed into the female screw at the other end 61b of the support member 61 shown in Figure 15(c). (a) shows the state in which the mill block body 20 is attached to the dedicated holder 60 shown in Figure 13 via the support member 61 to which the plunger is attached at the other end 61b, and (b) shows the support member 61 to which the plunger is attached at the other end 61b. Figure 19(b) shows the state in which the plunger at the other end 61b of the support member 61 is fitted into the recess which is a receiving structure at the end region 23a of the retaining member connection port 23. This is a side view of the mill block body 20 (mill block body 20A for the upper jaw) shown in Figure 9. This figure shows the preferred position and orientation when attaching the mill block body 20 (mill block body 20A for the upper jaw) shown in Figure 9 to the holder (holding member 30, dedicated holder 60).

[0018] [1. First Embodiment] The first embodiment of the present invention will be described below.

[0019] [1-1. Complete Denture, Standard Disc, and Disc Holder] The mill block kit for complete dentures in this embodiment (hereinafter also referred to as the "kit") is for manufacturing complete dentures using a CAD / CAM system with a milling machine equipped with a "disc holder" capable of holding a "standard disc". Here, the "standard disc" is a disc-shaped mill block having a predetermined diameter and thickness, with convex or concave portions formed on its outer circumference.

[0020] First, we will describe the complete denture that is the target of manufacture, as well as the standard disc and disc holder that are assumed to exist in the kit of this embodiment. In this specification, unless otherwise specified, the notation "x to y" using numerical values ​​x and y means "more than or equal to x and less than or equal to y". If a unit is attached only to the numerical value y in such notation, that unit shall also apply to the numerical value x.

[0021] (1) About complete dentures Dentures (removable dentures) refer to removable prosthetic devices that restore oral functions such as chewing when natural teeth and surrounding tissues such as gums and alveolar bone are lost, and prevent facial morphological changes and disorders caused by tooth loss and loss of surrounding tissues. Complete dentures refer to dentures used when all natural teeth are lost in the upper and / or lower jaw. In complete dentures, the components that replace missing (natural) teeth are artificial teeth, and the components that replace the surrounding tissues are the denture base.

[0022] In this denture base, the surface that is in close contact with the alveolar ridge mucosa is generally called the "mucosal surface" (or basal surface), the opposite surface that may come into contact with the buccal mucosa or tongue is generally called the "polished surface," and the boundary between the two is called the "base margin." Furthermore, the boundary between the gum-equivalent portion of the denture base and the artificial teeth is called the "cervical portion," and the wing-shaped portion with the cervical portion as the base and the base margin as the tip is called the "wing." In addition, the portion of the denture base to which the artificial teeth are fixed is called the "alveolar portion," the portion of the artificial teeth protruding from the denture base is called the "crown portion," and the portion of the denture base including the cervical portions between adjacent artificial teeth is called the "coronal papilla." In this embodiment of the kit, the parts of the Millblock body, which has an artificial dentition portion and a substantially complete denture base shape, are referred to using the names of the corresponding parts of a complete denture.

[0023] Comparing maxillary complete dentures and mandibular complete dentures, both have a common feature: the denture base has portions called the "labial wing" and the "buccal wing," which cover the alveolar ridge mucosa on the labial and buccal sides (in this specification, the direction facing labial and buccal is defined as anterior) of the patient's oral cavity. However, due to differences in the function and shape of the maxilla and mandible, the shape of the portion covering the mucosa on the thoracic side (in this specification, the direction facing thoracic is defined as posterior) of the patient's oral cavity differs significantly between maxillary and mandibular complete dentures. Specifically, the posterior portion of the maxillary denture base is called the "palatal wing," which covers the maxillary palatal mucosa, while the posterior portion of the mandibular denture base is called the "lingual wing," which covers the alveolar ridge mucosa on the lingual side of the mandible. The alveolar ridge is sandwiched between this lingual wing and the labial and buccal wing portions.

[0024] (2) Regarding standard disks, Figure 1 relates to the first embodiment of the present invention, where (a) is a plan view of a typical standard disk 1a having a protrusion on its outer circumference, and (b) is a side view of the standard disk 1a. Figure 2(a) is a plan view of a typical standard disk 1b having a recess on its outer circumference, and (b) is a side view of the standard disk 1b. Although the standard disks 1a shown in Figures 1(a) and (b) and the standard disks 1b shown in Figures 2(a) and (b) are different in form, both correspond to the "standard disk" 1.

[0025] As described above, the "standard disc" 1 is a disc-shaped (circular) dental mill block made of denture base material, having a predetermined diameter and thickness, used for the fabrication of (complete) denture bases. The standard disc 1 has a disc body with a disc-shaped (circular: low-height cylindrical) shape having a predetermined diameter and thickness, and a disc-side holding structure (mechanism) 3 consisting of a convex portion 3a or a concave portion 3b is formed on the outer circumference of the disc body. Here, for example, the predetermined diameter in Non-Patent Documents 1 and 2 is 94 to 95 mm, and the predetermined thickness is a thickness of about 15 to 40 mm, such as 16 mm or 35 mm. The predetermined diameter refers to the diameters of the circular upper and lower surfaces of the disc (low-height cylinder) in the disc body.

[0026] The standard disk 1 is equipped with a disk-side holding mechanism 3. The disk-side holding mechanism 3 in the standard disk 1a shown in Figures 1(a) and (b) is a continuous, strip-shaped protrusion 3a formed in the center of the outer circumference 2 (side surface) of the disk body, which is a disc, in the height direction, and having a predetermined width (corresponding to the length in the height direction) and thickness (corresponding to the difference between the radius of the outer circumference of the protrusion and the radius of the outer circumference of the disc).

[0027] Next, Figures 2(a) and (b) show a plan view and a side view of a typical standard disc 1b having a concave disc-side holding mechanism 3. The standard disc 1b has multiple recesses 3b formed on the outer circumference 2 (side surface) of the disc body on a disc (a low-height cylinder), which are cut out downwards (and / or upwards) from the top surface (and / or bottom surface) (the shape of the cutout is columnar, frustoconical, or conical). These recesses 3b correspond to the concave disc-side holding mechanism 3. In the configuration shown in Figures 2(a) and (b), three columnar recesses 3b are formed at equal intervals from the top and bottom surfaces, with a height of approximately one-quarter of the thickness of the standard disc, and are roughly semicircular (six in total, top and bottom).

[0028] (3) Regarding the disc holder, Figures 3 to 5 are diagrams showing the full-circumference compatible disc holder 4a, the half-circumference compatible disc holder 4b, and the full-circumference compatible disc holder 4c, respectively, which correspond to the disc holder 4. Of these, Figure 3 is a schematic diagram of the full-circumference compatible disc holder 4a for holding the standard disc 1a shown in Figure 1, where (a) is a front view of the full-circumference compatible disc holder 4a, (b) is a side view and cross-sectional view thereof of the full-circumference compatible disc holder 4a, and (c) is a schematic cross-sectional view when the standard disc 1a is held in the full-circumference compatible disc holder 4a.

[0029] Figure 4 is a schematic front view of a half-circumferentially fitting disc holder 4b for holding the standard disc 1a shown in Figure 1. Figure 5 is a schematic diagram of a fully-circumferentially fitting disc holder 4c for holding the standard disc 1b shown in Figure 2, where (a) is a front view of the fully-circumferentially fitting disc holder 4c and (b) is a schematic cross-sectional view when the standard disc 1b is held in the fully-circumferentially fitting disc holder 4c.

[0030] The disc holder 4 is an accessory or jig used to set the "standard disc" 1, which is standard equipment on a cutting machine used for the fabrication of complete dentures using a CAD / CAM system. The specific form of this disc holder 4 may differ depending on the device. However, the disc holder 4 is common in that it has a standard disc holding mechanism that can hold the standard disc 1 using the disc-side holding mechanism 3 (for example, by fitting or engaging with it), and more specifically, it has a disc holding frame 5 that has the disc-side holding mechanism 3 and the standard disc holding mechanism 6 that fits or engages with it.

[0031] The standard disk holding mechanism 6 is either a recess 6a (see Figure 3) or a protrusion 6b (see Figure 5). The recess 6a fits into or engages with the protrusion 3a, which is the disk-side holding mechanism 3, and the protrusion 6b fits into or engages with the recess 3b, which is the disk-side holding mechanism 3.

[0032] The disk holder 4 corresponding to the standard disk 1a has a standard disk holding mechanism 6 consisting of a recess 6a that fits or engages with the protrusion 3a, which is the disk-side holding mechanism 3. A disk holder 4a having such a holding mechanism will be described with reference to Figure 3.

[0033] This disc holder 4a has a disc holding frame 5. The disc holding frame 5 comprises an upper fixing plate 7, a lower fixing plate 8, and a cylindrical wall member 9. The upper fixing plate 7 and the lower fixing plate 8 are plate-shaped parts, each having a circular hole (holding hole) in the center with a diameter corresponding to the diameter of the disc body of the standard disc 1a. The upper fixing plate 7 is located on the upper side, and the lower fixing plate 8 is located on the lower side. The cylindrical wall member 9 is a cylindrical wall corresponding to the outer circumference of the protrusion 3a of the standard disc 1a. The disc holding frame 5 has a basic structure that allows the upper fixing plate 7 and the lower fixing plate 8 to be fixed using screws or the like, with the cylindrical wall member 9 sandwiched between them, in a parallel arrangement such that the centers of the holding holes coincide. In other words, the disc holding frame 5 is configured with the upper fixing plate 7, the lower fixing plate 8, and the cylindrical wall member 9 fixed together.

[0034] The cylindrical wall member 9 is positioned so that its center coincides with the center of the holding hole, and a recess 6a is formed by the inner circumferential surface of the cylindrical wall member 9 and the lower surface of the upper fixing plate 7 (which protrudes overhang into the disc holding frame 5) and the upper surface of the lower fixing plate 8. As shown in Figure 3(c), the convex portion 3a, which is the disc-side holding mechanism 3, is housed in the recess 6a, and the standard disc 1a is held in the disc holder 4a.

[0035] When holding and fixing the standard disc 1a in the disc holder 4a, the upper fixing plate 7 is removed, and the standard disc 1a is placed on the upper surface of the lower fixing plate 8 so that the lower surface of the protrusion 3a is in contact with the upper surface of the lower fixing plate 8. After that, the upper fixing plate 7 is attached, and the upper fixing plate 7, lower fixing plate 8, and cylindrical wall member 9 are fixed together (for example, with screws). Although not shown, at least one of the upper fixing plate 7 and the lower fixing plate 8 may be composed of two or more parts that can rotate or slide. In this case, a mechanism such as a spring mechanism may be used to temporarily widen the holding hole and return it to its original position to attach and detach the standard disc. Furthermore, although not shown, a mechanism (set mechanism) that can be attached to a cutting machine in a manner corresponding to the structure of the cutting machine is provided separately from the disc holder 4. Examples of set mechanisms include a sliding mechanism for setting on the cutting machine and a mechanism for fixing with screws. A sliding set mechanism refers to a mechanism in which, for example, a "receiving structure" for holding a standard disc slides freely along a guide rail to set the "receiving structure" in a predetermined position on a cutting machine.

[0036] Note that the disc holder 4a is an example of a disc holder that can accommodate a standard disc 1a, and Figure 3 shows an upper fixing plate 7 and a lower fixing plate 8, both having the same rectangular outer diameter. However, the shapes of the upper fixing plate 7 and the lower fixing plate 8 may be different, and their outer shapes may be, for example, circular or polygonal. Furthermore, the cylindrical wall member 9 may be made by cutting the cylindrical wall member vertically along the circumference and dividing it into multiple arc-shaped members (with a cross-section), which are then arranged at intervals. Moreover, as shown in Figure 4, a configuration using a disc holder 4b in which the entire disc holder 4a is divided into two parts may be used. In this case, the disc holder 4b may include the main part of the disc holder 4a, with a portion missing and the circular hole (holding hole) opening in a "C" shape.

[0037] Furthermore, in the configuration shown in Figure 5, the disk holder 4c corresponding to the standard disk 1b has a standard disk holding mechanism 6 consisting of a protrusion 6b that fits into or engages with the recess 3b, which is the disk-side holding mechanism 3.

[0038] When holding and fixing the standard disc 1b in the disc holder 4c, with the upper fixing plate 7 removed, the standard disc 1b is placed in the holding hole so that its lower surface is flush with the lower surface of the lower fixing plate 8, and then the three protrusions 6b attached to the lower fixing plate 8 are inserted into the three recesses 3b formed on the lower (bottom) side of the standard disc 1b. Similarly, the three protrusions 6b attached to the upper fixing plate 7 are inserted into the three recesses 3b formed on the upper side of the standard disc 1b. Then, the upper fixing plate 7 and the lower fixing plate 8 can be fixed together (for example, with screws). Alternatively, the protrusions 6b attached to the upper fixing plate 7 and the lower fixing plate 8 may be fixed by sliding the protrusions 6b and then screwing them in place. It is also possible to have a member such as the cylindrical wall member 9 shown in Figure 3.

[0039] The kit of the present embodiment is a complete denture mill block kit for fabricating a denture by a CAD / CAM system using a cutting machine equipped with the disk holder 4 as described above, and exhibits the above-described effects. Hereinafter, the kit of the present embodiment will be described in detail with reference to the drawings.

[0040] [1-2. Outline of the Kit of the Present Embodiment] The inventors considered that the above problems could be solved by using the concept of a "reference denture" used in fabricating a complete denture, and conducted studies. The reference denture is shown in FIGS. 6 to 8. FIG. 6 is a perspective view showing the reference denture 10, where (a) shows the maxillary reference denture 10A and (b) shows the mandibular reference denture 10B. Further, FIG. 7(a) is a diagram for explaining the lengths of respective parts having a suitable planar shape based on the length of the line segment PQ in a plan view of the maxillary reference denture 10A, and (b) is a diagram for explaining the lengths of respective parts having a suitable planar shape based on the length of the line segment pq in a plan view of the mandibular reference denture 10B. FIG. 8 is a cross-sectional view of a complete denture (complete denture) type denture 100 in a canine-containing form fabricated using the reference denture 10, where (a) shows the maxillary denture 100A and (b) shows the mandibular denture 100B of the denture 100.

[0041] Note that the maxillary reference denture 10A and the mandibular reference denture 10B respectively correspond to the reference denture 10. Also, the maxillary denture 100A and the mandibular denture 100B respectively correspond to the denture 100. Further, artificial teeth 12A and artificial teeth 12B described later respectively correspond to the artificial teeth 12. Hereinafter, when there is no need to distinguish between the maxillary reference denture 10A and the mandibular reference denture 10B, they may be simply described as the reference denture 10. Similarly, when there is no need to distinguish between the maxillary denture 100A and the mandibular denture 100B, they may be simply described as the denture 100. Similarly, when there is no need to distinguish between the artificial teeth 12A and the artificial teeth 12B, they may be simply described as the artificial teeth 12.

[0042] Further, the denture 100 (maxillary denture 100A, mandibular denture 100B) shown in FIG. 8 is an unfinished denture, and each part thereof is also a part of an unfinished denture. However, in the following description, the finally completed denture and each part thereof will also be described using the same reference numerals as those shown in FIG. 8.

[0043] Further, as shown in FIGS. 8(a) and (b), the denture 100 has a denture base 101 formed from a reference denture base 11. The maxillary denture 100A has a maxillary denture base 101A, and the mandibular denture 100B has a mandibular denture base 101B. However, when there is no need to distinguish between the maxillary denture base 101A and the mandibular denture base 101B, it may be simply described as the denture base 101.

[0044] Note that the reference denture 10 includes a reference denture base 11, and a mucosal surface 13 and a floor flange 14 are provided on this reference denture base 11. In FIG. 6(a), the reference denture base 11, mucosal surface 13, and floor flange 14 on the side of the maxillary reference denture 10A are indicated by attaching the letter "A". In FIG. 6(b), the reference denture base 11, mucosal surface 13, and floor flange 14 on the side of the mandibular reference denture 10B are indicated by attaching the letter "B".

[0045] Here, the reference denture 10 is, for example, as described in Patent Document 4, a member for making a complete denture designed such that the planar shape and three-dimensional shape of the reference denture base 11 are adapted to many patients (so as to be a common part like a greatest common divisor) based on a lot of clinical data and data on the oral cavity shapes of many dentate and edentulous patients. As shown in FIGS. 6(a) and (b), it is composed of the reference denture base 11 and artificial teeth 12 fixedly held thereto.

[0046] In other words, as shown in Figures 8(a) and (b), the standard denture base 11 is the base for the denture 100. Compared to the final form (shape) of the denture base 101 of this denture 100, the space or gap formed between the mucosal surface 13, base wings 14 to the margins and posterior edge of the denture and the oral mucosa of the individual patient (the wearer) (hereinafter referred to as the "standard denture misfit space") is filled with a "preparation member 102" (shaded area in Figure 8) made of a hardened body of a hardenable denture base material such as a lining material, so that the two fit together. And although it is smaller by the amount of the standard denture misfit space (or preparation member 102), which can be called the "adjustment allowance," its basic structure and shape are the same as a standard denture.

[0047] In Figure 8(a), the preparation member 102 on the maxillary denture 100A side is indicated with the letter "A". In Figure 8(b), the preparation member 102 on the A side of the mandibular denture 100B side is indicated with the letter "B".

[0048] Furthermore, as shown in Patent Document 4, standard dentition patterns based on existing occlusal theories are known for the arrangement of artificial teeth 12, such as the square, oval-square, oval-circular, and oval-V-shaped patterns according to Thompson's classification criteria. Therefore, standard dentures 10 have pre-fabricated dentition, and their arrangement does not require many variations. Often, dentures are prepared in relatively different sizes, such as S, M, and L sizes, and by preparing several sizes of standard dentures 10, it becomes possible to accommodate almost all cases.

[0049] In other words, in the fabrication of complete dentures, it is known that parts of the dentition and denture base 101 can be prefabricated, while parts that are adjusted for each patient's oral mucosa, such as the non-fitting space of the standard denture base 11 in the standard denture 10.

[0050] Furthermore, although the denture base 101 of a complete denture is adjusted for each patient's oral mucosa, its size has been studied clinically. For example, non-patent literature (Shigeki Miyake, On the Morphological Characteristics of the Edentulous Alveolar Ridge, Journal of Prosthodontics, Japan, 1990, vol. 34, pp. 442-452) is known regarding the anterior-posterior and lateral lengths of a standard denture base 101, and non-patent literature (National Association for Dental Technician Education, ed., Removable Denture Technology, Complete Denture Technology, Japan, Ishiyaku Publishers, Inc., 1994, 1st edition, 11th printing, pp. 46-48) is known regarding the thickness of the denture base.

[0051] The inventors considered that instead of adding a preparation member 102 to the standard denture base 11 of the standard denture 10 afterwards, if a mill block with a larger shape for the denture base to be cut, which has more room than the standard non-fitting space of the standard denture, was used, and the artificial dentition part corresponding to the artificial dentition of the standard denture 10 was fixed to it, then a complete denture could be manufactured simply by removing the excess portion through cutting. Furthermore, the inventors conceived that if the mill block, or the mill block with an additional (relatively thin) thickness added to a part or the entire surface to allow for fine adjustment of its shape, were to be made into a main body, and this mill block was to be kitted with a holding member that can be attached to a standard disc holder 4, then it would be possible to set it directly into a general-purpose cutting machine without compromising these features, thus completing the present invention.

[0052] In other words, the kit in this embodiment comprises a mill block body for the upper or lower jaw to be machined, and a holding member for holding the mill block body in the disc holder, wherein the mill block body comprises an artificial dentition portion for the upper or lower jaw made of artificial tooth material, and a denture base portion for the upper or lower jaw made of denture base material that is substantially denture base shaped and fixed to the artificial dentition portion, and the outer circumference of the denture base portion for the upper or lower jaw of the mill block body is provided with a plurality of holding member connection ports. The holding member has a holder connection portion having a fixing and holding mechanism that contacts at least a part of the disc holding frame of the disc holder and is detachably fixed and held in the disc holder, and a body connection portion that contacts a plurality of holding member connection ports of the mill block body and is connected and fixed to the upper jaw or lower jaw mill block body, and thereby fixes and holds the upper jaw or lower jaw mill block body in a predetermined position within the disc holding frame of the disc holder. Note that the kit according to this embodiment does not necessarily have to be supplied with the mill block body and the holding member in a separate state, and may be provided in a pre-assembled state.

[0053] The mill block body and retaining members that constitute the kit of this embodiment will be described in detail below.

[0054] [1-3. Mill Block Body] Figure 9 is a plan view showing the shape of the mill block body 20 according to this embodiment, where (a) shows the maxillary mill block body 20A with a convex retaining member connection port formed on its outer circumference, and (b) shows the mandibular mill block body 20B, which also has a convex retaining member connection port formed on its outer circumference. Although the maxillary mill block body 20A shown in Figure 9(a) and the mandibular mill block body 20B shown in Figure 9(b) have different shapes, both correspond to the mill block body 20.

[0055] The mill block body 20 is the object to be machined, and as described above, there is an upper mill block body 20A for making upper complete dentures and a lower mill block body 20B for making lower complete dentures. The kit of this embodiment includes at least one of the mill block bodies 20.

[0056] As shown in Figure 9, the upper jaw mill block body 20A and the lower jaw mill block body 20B each have an upper jaw artificial dentition section 21A and a lower jaw artificial dentition section 21B made of artificial tooth material, and a roughly denture base-shaped upper jaw denture base cut-to-machine section 22A and a lower jaw denture base cut-to-machine section 22B made of denture base material that fix the artificial dentition section. Furthermore, multiple retaining member connection ports 23 are provided on the outer circumference of the upper jaw or lower jaw denture base cut-to-machine section 22A and 22B of the upper jaw or lower jaw mill block body 20A and 20B.

[0057] The upper artificial dentition section 21A and the lower artificial dentition section 21B correspond to the artificial dentition section 21, respectively. Furthermore, the upper denture base cut-to-machine section 22A and the lower denture base cut-to-machine section 22B correspond to the denture base cut-to-machine section 22, respectively.

[0058] As described in the overview of the kit of this embodiment, the mill block body 20 has an artificial dentition section 21, which corresponds to the artificial dentition of a reference denture, fixed to the cut-to-machine section 22 for the denture base. Furthermore, the term "approximately complete denture base shape," which describes the shape of the cut-to-machine section 22 for the denture base, means that it has the general three-dimensional characteristics seen in the description of the morphology of a standard complete denture, and that the polished surface and mucosal surface of the denture base are slightly larger than those of a standard (clinical) complete denture base or a denture base made from a reference denture.

[0059] As described above, the standard denture 10 is provided with a common form of the standard denture base 11 that is similar to the greatest common denominator of multiple dentition sizes, such as S, M, and L sizes. Similarly, the mill block body 20 is also provided with multiple dentition sizes, such as S, M, and L sizes, and multiple approximate complete denture shapes for the machined portion 22 for the denture base are prepared with a range of sizes. As described above, the standard shape and size for each size of complete dentures have been statistically investigated (for example, it is known that the height of the occlusal rim for the maxilla is 22 mm and the height of the occlusal rim for the mandible is 18 mm), so it is possible to determine the range of sizes for the approximate complete denture shape of the machined portion 22 for the denture base for each dentition size.

[0060] In other words, the mill block body 20 has a denture base cutting portion 22 to which an artificial dentition portion 21 having a standard size and shape and in which artificial teeth corresponding to teeth 1 to 7 on both the left and right sides are arranged in a standard pattern is fixed. This portion has parts corresponding to the polished surface, mucosal surface, the base margin which is the boundary between the polished surface and the mucosal surface, and the base wing of a complete denture. A portion of each artificial tooth in the artificial dentition portion 21 forms a standard cervical area, exposing the crown, and a gingival region with a standard shape is formed, at least from the coronal papilla to the cervical area. The area of ​​the upper or lower denture base cutting portion 22 other than the gingival region corresponding to the coronal papilla to the cervical area is larger than the shape of a standard complete denture, to the extent described above, and multiple retaining member connection ports 23 are provided on the outer circumference of the denture base cutting portion 22.

[0061] Known artificial teeth can be used for the artificial dentition portion 21. Known materials for artificial teeth include resin, ceramic, and composite materials of resin and inorganic filler. As for artificial teeth, connected artificial teeth, in which two or more artificial teeth are linked together and integrated, can also be used. Furthermore, it is preferable that the artificial teeth have a base portion (a portion embedded in the denture base) in addition to the portion corresponding to the crown portion, and it is preferable that at least a part of the artificial tooth is embedded in the machined portion 22 for the denture base.

[0062] Furthermore, with respect to the artificial dentition section 21 (upper artificial dentition section 21A and lower artificial dentition section 21B), in addition to those in which artificial teeth corresponding to teeth 1 to 7 on both the left and right sides are arranged in a standard arrangement pattern as described above, those consisting of a combination of a machined anterior tooth component and a molar component as described in Patent Document 3 can also be used.

[0063] Furthermore, the material for the machined portion 22 of the denture base can be any material that can be used as a material for a dental mill block without any particular limitations. Specific examples of materials that can be suitably used include poly(meth)acrylate resins, polyamide resins (e.g., nylon 66®), polyester resins (e.g., polycarbonate), and polyether resins (e.g., polyacetal, polysulfone). Poly(meth)acrylate resins and polyester resins are particularly preferred from the viewpoint of processability in a cutting machine and adhesion to the denture base relining material, which is a repair material for the denture base 101. A filler can also be included to improve the strength of the denture base 101. The filler may be an organic filler, an inorganic filler, or an organic-inorganic composite filler.

[0064] Furthermore, the manufacturing method of the mill block body 20 is not particularly limited, and various methods such as injection molding, compression molding, casting, and stereolithography using a 3D printer can be employed. From the viewpoint of efficient mass production, it is preferable to employ a so-called insert molding method in which pre-prepared artificial teeth are placed in predetermined positions in a mold of predetermined shape, and the resin that will become the denture base material is heated, melted (or thermally softened) and filled into the mold.

[0065] The following describes suitable artificial dentition portions and suitable machined portions for denture bases.

[0066] [1-4. Preferred configuration of the maxillary mill block body] Figure 10 is a diagram illustrating a preferred maxillary mill block body 20A (excluding the retaining member connection port 23), where (a) is a plan view as seen from the dentition side, (b) is a projection of the denture base from the mucosal side (the side without a dentition), (c) is a cross-section in the anterior-posterior direction including the space between the left and right artificial teeth (number 1), (d) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 5), and (e) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 7).

[0067] First, preferred embodiments of the artificial dentition section 21 and its planar shape will be explained based on Figures 10(a) and (b) (preferred embodiments of the retaining member connection port will be described later). Since the maxillary mill block body 20A is for complete dentures, the artificial dentition section 21 (maxillary artificial dentition section 21A) has 14 artificial teeth (right and left 1st: central incisor, 2nd: lateral incisor, 3rd: canine, 4th: first premolar, 5th: second premolar, 6th: first molar, 7th: second molar).

[0068] In these diagrams, point O represents the anterior tip, with the lip side being anterior and the throat side posterior. Point M represents the midpoint of the line segment AA' connecting point A at the posterior left posterior edge and point A' at the posterior right posterior edge.

[0069] Furthermore, in a straight line passing through the distal cervical area of ​​the left and right artificial tooth #3 and perpendicular to line segment OM, the point where it intersects the left contour line is designated as point B3, and the point where it intersects the right contour line is designated as point B3'. In a straight line passing through the distal cervical area of ​​the left and right artificial tooth #5 and perpendicular to line segment OM, the point where it intersects the left contour line is designated as point B5, and the point where it intersects the right contour line is designated as point B5'. In a straight line passing through the distal cervical area of ​​the left and right artificial tooth #7 and perpendicular to line segment OM, the point where it intersects the left contour line is designated as point B7, and the point where it intersects the right contour line is designated as point B7'.

[0070] Furthermore, the interdental space between the left maxillary central incisor and the right maxillary central incisor is defined as point O', the cusp of the left maxillary canine is defined as point T3, the cusp of the right maxillary canine is defined as point T3', the intersection of the central groove of the left maxillary second premolar and the central occlusal surface ridge is defined as point T5, the intersection of the central groove of the right maxillary second premolar and the central occlusal surface ridge is defined as point T5', the central fossa of the left maxillary second molar is defined as point T7, the central fossa of the right maxillary second molar is defined as point T7', the intersection of line segment O'M and the perpendicular line segment T3T3' is defined as point P3, the intersection of line segment O'M and the perpendicular line segment T5T5' is defined as point P5, and the intersection of line segment O'M and the perpendicular line segment T7T7' is defined as point P7.

[0071] The arrangement of the artificial dentition section 21 (artificial dentition section 21A) in the maxillary mill block body 20A preferably satisfies all of the following conditions 1-1) to 1-6), and it is particularly preferable that it satisfies all of the following conditions 1-1') to 1-6'). 1-1) The length of line segment O'P3 is 5 to 12 mm. 1-2) The length of line segment O'P5 is 21 to 26 mm. 1-3) The length of line segment O'P7 is 36 to 46 mm. 1-4) The length of line segment T3T3' is 29 to 42 mm. 1-5) The length of line segment T5T5' is 37 to 49 mm. 1-6) The length of line segment T7T7' is 45 to 58 mm.

[0072] 1-1') The length of line segment O'P3 is 6-10 mm. 1-2') The length of line segment O'P5 is 22-24 mm. 1-3') The length of line segment O'P7 is 37-44 mm. 1-4') The length of line segment T3T3' is 30-38 mm. 1-5') The length of line segment T5T5' is 38-46 mm. 1-6') The length of line segment T7T7' is 46-55 mm.

[0073] Furthermore, the contour line of the machined portion 22 for the denture base (machined portion 22A for the maxillary denture base) in the mucosal surface projection diagram preferably satisfies all of the following conditions 2-1) to 2-5), and it is particularly preferable that it satisfies all of the following conditions 2-1') to 2-5'). 2-1) The length of line segment OM is 50 to 66 mm. 2-2) The length of line segment AA' is 50 to 59 mm. 2-3) The length of line segment B3B3' is 49 to 63 mm. 2-4) The length of line segment B5B5' is 58 to 82 mm. 2-5) The length of line segment B7B7' is 70 to 90 mm.

[0074] 2-1') The length of line segment OM is 54-64 mm. 2-2') The length of line segment AA' is 52-57 mm. 2-3') The length of line segment B3B3' is 52-59 mm. 2-4') The length of line segment B5B5' is 66-78 mm. 2-5') The length of line segment B7B7' is 76-88 mm.

[0075] Next, preferred embodiments of the three-dimensional shape will be described with reference to Figures 10(c) to (e). When the plane containing the midpoint between the mesial corners of the maxillary left and right central incisors (incisor point) and the distal buccal cusp tips of the maxillary left and right second molars is defined as the "maxillary reference plane," Figure 10(c) is a cross-sectional view of a plane that intersects perpendicularly with the maxillary reference plane, including points O and M in Figure 10(b). In Figure 11(c), point J is the lingual cervical portion of the mesial side of the first artificial tooth, point K is the base margin of the wingtip, and point L is the deepest part of the alveolar crest on the mucosal surface. Point N is the point where the line passing through point L and perpendicular to line segment JK intersects the contour line of the labial polishing surface.

[0076] The upper jaw mill block body 20A is preferably shaped such that the cross-section satisfies the following conditions 3-1) and 3-2), and is particularly preferably shaped such that it satisfies all of the following conditions 3-1') and 3-2'). 3-1) The length of line segment JK is 19 to 33 mm. 3-2) The length of line segment LN is 9 to 19 mm. 3-1') The length of line segment JK is 21 to 28 mm. 3-2') The length of line segment LN is 11 to 17 mm.

[0077] Furthermore, Figure 10(d) is a cross-sectional view of a plane that includes points B5 and B5' in Figure 10(b) and intersects perpendicularly with the maxillary reference plane. Point C5 is the point where the perpendicular line passing through segment MO intersects the mucosal surface, and point D5 is the point where the perpendicular line passing through segment MO intersects the palatal polished surface. Point E5 is the lingual cervical portion of the left artificial tooth, point E5' is the lingual cervical portion of the right artificial tooth, and point F5 is the edge of the left wing tip. Assuming that point G5 is the deepest point of the alveolar crest on the left mucosal surface, point H5 is the point where the line passing through point G5 and perpendicular to line segment E5F5 intersects the contour line of the left buccal polished surface, point F5' is the edge of the right wing tip, point G5' is the deepest point of the alveolar crest on the right mucosal surface, and point H5' is the point where the line passing through point G5' and perpendicular to line segment E5'F5' intersects the contour line of the right buccal polished surface.

[0078] The upper jaw mill block body 20A is preferably shaped such that the cross-section satisfies the following conditions 4-1) and 4-3), and is particularly preferably shaped such that all of the following conditions 4-1') to 4-3') are satisfied. 4-1) The length of line segment C5D5 is 7 to 17 mm. 4-2) The lengths of line segment E5F5 and line segment E5'F5' are 22 to 34 mm. 4-3) The lengths of line segment G5H5 and line segment G5'H5' are 8 to 18 mm.

[0079] 4-1') The length of line segment C5D5 is 9 to 15 mm. 4-2') The lengths of line segments E5F5 and E5'F5' are 24 to 30 mm. 4-3') The lengths of line segments G5H5 and G5'H5' are 10 to 16 mm.

[0080] Furthermore, Figure 10(e) is a cross-sectional view of a plane that includes points B7 and B7' in Figure 10(b) and intersects perpendicularly with the maxillary reference plane, where point C7 is the point where the perpendicular line passing through segment MO intersects the mucosal surface, point D7 is the point where the perpendicular line passing through segment MO intersects the palatal polished surface, point E7 is the lingual cervical portion of the left artificial tooth, point E7' is the lingual cervical portion of the right artificial tooth, and point F7 is the edge of the left wing tip. Furthermore, point G7 is defined as the deepest point of the alveolar crest on the left mucosal surface, point H7 is defined as the point where the line passing through point G7 and perpendicular to line segment E7F7 intersects the contour line of the left buccal polished surface, point F7' is defined as the edge of the right wing tip, point G7' is defined as the deepest point of the alveolar crest on the right mucosal surface, point H7' is defined as the point where the line passing through point G7' and perpendicular to line segment E7'F7' intersects the contour line of the right buccal polished surface.

[0081] The upper jaw mill block body 20A is preferably shaped such that the cross-section satisfies the following conditions 5-1) and 5-3), and is particularly preferably shaped such that all of the following conditions 5-1') to 5-3') are satisfied. 5-1) The length of line segment C7D7 is 4 to 14 mm. 5-2) The lengths of line segments E7F7 and E7'F7' are 22 to 34 mm. 5-3) The lengths of line segments G7H7 and G7'H7' are 8 to 18 mm.

[0082] 5-1') The length of line segment C7D7 is 6 to 12 mm. 5-2') The lengths of line segments E7F7 and E7'F7' are 24 to 30 mm. 5-3') The lengths of line segments G7H7 and G7'H7' are 10 to 16 mm.

[0083] Furthermore, the volume of the denture base cutting section 22 (maxillary denture base cutting section 22A) of the maxillary mill block body 20A is 24,000 to 85,000 mm³. ３ , especially 40,000 to 71,000 mm ３ It is particularly preferable that this be the case.

[0084] [1-5. Preferred Embodiments of the Mandibular Mill Block Body] Figure 11 is a diagram illustrating a preferred shape of the mandibular mill block body 20B, where (a) is a plan view as seen from the dentition side, (b) is a projection of the denture base from the mucosal side (the side without a dentition), (c) is a cross-section in the anterior-posterior direction including the space between the left and right artificial teeth (number 1), (d) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 3), (e) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 5), and (f) is a cross-section in the lateral direction including the distal cervical regions of the left and right artificial teeth (number 7).

[0085] First, preferred embodiments of the artificial dentition and its planar shape will be explained based on Figures 11(a) and (b). Since it is for a complete denture, the artificial dentition has 14 artificial teeth (right and left 1st: central incisor, 2nd: lateral incisor, 3rd: canine, 4th: first premolar, 5th: second premolar, 6th: first molar, 7th: second molar).

[0086] Furthermore, in a straight line passing through the distal cervical area of ​​the left and right artificial tooth 3 and perpendicular to line segment om, the point where it intersects the left contour line is designated as point b3, and the point where it intersects the right contour line is designated as point b3'. In a straight line passing through the distal cervical area of ​​the left and right artificial tooth 5 and perpendicular to line segment om, the point where it intersects the left contour line is designated as point b5, and the point where it intersects the right contour line is designated as point b5'. In a straight line passing through the distal cervical area of ​​the left and right artificial tooth 7 and perpendicular to line segment om, the point where it intersects the left contour line is designated as point b7, and the point where it intersects the right contour line is designated as point b7'.

[0087] Furthermore, point c5 is defined as the point where the line passing through point b5 and perpendicular to line segment oa intersects the left lingual contour line; point c5' is defined as the point where the line passing through point b5' and perpendicular to line segment oa' intersects the right lingual contour line; point c7 is defined as the point where the line passing through point b7 and perpendicular to line segment oa intersects the left lingual contour line; and point c7' is defined as the point where the line passing through point b7' and perpendicular to line segment oa' intersects the right lingual contour line.

[0088] Furthermore, the interdental space between the left and right mandibular central incisors is defined as point o', the cusp of the left mandibular canine is defined as point t3, the cusp of the right mandibular canine is defined as point t3', the intersection of the central groove of the left mandibular second premolar and the central occlusal surface ridge is defined as point t5, the intersection of the central groove of the right mandibular second premolar and the central occlusal surface ridge is defined as point t5', the central fossa of the left mandibular second molar is defined as point t7, the central fossa of the right mandibular second molar is defined as point t'7, the intersection of line segment o'm and the perpendicular line segment t3t3' is defined as point p3, the intersection of line segment o'm and the perpendicular line segment t5t5' is defined as point p5, and the intersection of line segment o'm and the perpendicular line segment t7t7' is defined as point p7.

[0089] The arrangement of the artificial dentition section 21 (artificial dentition section 21B for the mandible) in the mandibular mill block body 20B preferably satisfies all of the following conditions 6-1) to 6-6), and it is particularly preferable that it satisfies all of the following conditions 6-1') to 6-6'). 6-1) The length of line segment o'p3 is 2 to 10 mm. 6-2) The length of line segment o'p5 is 12 to 23 mm. 6-3) The length of line segment o'p7 is 25 to 44 mm. 6-4) The length of line segment t3t3' is 22 to 34 mm. 6-5) The length of line segment t5t5' is 30 to 44 mm. 6-6) The length of line segment t7t7' is 40 to 54 mm.

[0090] 6-1') The length of line segment o'p3 is 2 to 8 mm. 6-2') The length of line segment o'p5 is 13 to 21 mm. 6-3') The length of line segment o'p7 is 27 to 40 mm. 6-4') The length of line segment t3t3' is 23 to 28 mm. 6-5') The length of line segment t5t5' is 31 to 40 mm. 6-6') The length of line segment t7t7' is 41 to 50 mm.

[0091] Furthermore, the contour line of the machined portion 22 for the denture base (machined portion 22B for the mandibular denture base) in the mucosal surface projection view preferably satisfies all of the following conditions 7-1) to 7-7), and it is particularly preferable that it satisfies all of the following conditions 7-1') to 7-7'). 7-1) The length of line segment om is 57 to 67 mm. 7-2) The length of line segment aa' is 50 to 67 mm. 7-3) The length of line segment b3b3' is 52 to 69 mm. 7-4) The length of line segment b5b5' is 61 to 79 mm. 7-5) The length of line segment b7b7' is 72 to 88 mm. 7-6) The lengths of line segments b5c5 and b5'c5' are 19 to 31 mm. 7-7) The lengths of line segments b7c7 and b7'c7' are 22 to 34 mm.

[0092] 7-1') The length of line segment om is 58-65 mm. 7-2') The length of line segment aa' is 52-65 mm. 7-3') The length of line segment b3b3' is 56-65 mm. 7-4') The length of line segment b5b5' is 63-75 mm. 7-5') The length of line segment b7b7' is 74-86 mm. 7-6') The lengths of line segments b5c5 and b5'c5' are 21-27 mm. 7-7') The lengths of line segments b7c7 and b7'c7' are 24-30 mm.

[0093] Next, preferred embodiments of the three-dimensional shape will be explained with reference to Figures 11c) to (f). When the plane containing the midpoint between the mesial angles of the left and right mandibular central incisors (incisor point) and the distal buccal cusp tips of the left and right mandibular second molars is defined as the "mandibular reference plane," Figure 11(c) is a cross-sectional view of a plane that includes points o and m in Figure 11(b) and intersects the mandibular reference plane perpendicularly. In Figure 11(c), point g is the lingual cervical portion of the mesial side of the first artificial tooth, point h is the base edge of the labial wingtip, and point i is the base edge of the lingual wingtip. The line segment jk (point j on the labial side and point k on the lingual side) is parallel to the line segment om and indicates the thickness in the anterior-posterior direction.

[0094] The mandibular mill block body 20B is preferably shaped such that the cross-section satisfies all of the following conditions 8-1) to 8-3), and is particularly preferably shaped such that it satisfies all of the following conditions 8-1') to 8-3'). 8-1) The length of line segment gh is 11 to 22 mm. 8-2) The length of line segment gi is 12 to 25 mm. 8-3) The length of line segment jk is 19 to 28 mm.

[0095] 8-1') The length of line segment gh is 13 to 20 mm. 8-2') The length of line segment gi is 15 to 22 mm. 8-3') The length of line segment jk is 21 to 27 mm.

[0096] Furthermore, Figure 11(d) is a cross-sectional view of a plane that includes points b3 and b3' in Figure 11(b) and intersects perpendicularly with the mandibular reference plane. On the left and right sides, points d3 and d3' are defined as points where a straight line passing through the buccal cervical portion of the artificial tooth and perpendicular to the mandibular reference plane intersects the contour line on the polished surface side, and points e3 and e3' are defined as points where a straight line intersects the contour line on the mucosal surface side.

[0097] The mandibular mill block body 20B preferably has a cross-sectional shape that satisfies the following condition 9-1), and is particularly preferably that satisfies the following condition 9-1'). 9-1) The lengths of line segments d3e3 and d3'e3' are 8 to 18 mm. 9-1') The lengths of line segments d3e3 and d3'e3' are 10 to 16 mm.

[0098] Furthermore, Figure 11(e) is a cross-sectional view of a plane that includes points b5 and b5' in Figure 11(b) and intersects perpendicularly with the mandibular reference plane. On the left and right sides, points d5 and d5' are defined as points where a straight line passing through the buccal cervical portion of the artificial tooth and perpendicular to the mandibular reference plane intersects the contour line on the polished surface side, and points e5 and e5' are defined as points where it intersects the contour line on the mucosal surface side. Points f5 and f5' are defined as the edges of the tip of the lingual wing on the left and right sides.

[0099] The mandibular mill block body 20B preferably has a cross-sectional shape that satisfies all of the following conditions 10-1) and 10-2), and is particularly preferably satisfied with conditions 10-1') and 10-2'). 10-1) The lengths of line segments d5e5 and d5'e5' are 11 to 21 mm. 10-2) The lengths of line segments d5f5 and d5'f5' are 18 to 32 mm. 10-1') The lengths of line segments d5e5 and d5'e5' are 13 to 19 mm. 10-2') The lengths of line segments d5f5 and d5'f5' are 21 to 29 mm.

[0100] Furthermore, Figure 11(f) is a cross-sectional view of a plane that includes points b7 and b7' in Figure 11(b) and intersects perpendicularly with the mandibular reference plane. On the left and right sides, points d7 and d7' are defined as points where a straight line passing through the buccal cervical portion of the artificial tooth and perpendicular to the mandibular reference plane intersects the contour line on the polished surface side, and points e7 and e7' are defined as points where it intersects the contour line on the mucosal surface side. Points f7 and f7' are defined as the edges of the lingual wing tips on the left and right sides.

[0101] The mandibular mill block body 20B preferably has a cross-sectional shape that satisfies the following conditions 11-1) and 11-2), and is particularly preferably satisfied with the following conditions 11-1') and 11-2'). 11-1) The lengths of line segments d7e7 and d7'e7' are 14 to 24 mm. 11-2) The lengths of line segments d7f7 and d7'f7' are 18 to 32 mm. 11-1') The lengths of line segments d7e7 and d7'e7' are 16 to 22 mm. 11-2') The lengths of line segments d7f7 and d7'f7' are 21 to 29 mm.

[0102] Furthermore, the volume of the denture base cutting section 22 (mandibular denture base cutting section 22B) of the mandibular mill block body 20B is 19,000 to 60,000 mm³. ３ , especially 20,000 to 50,000 mm ３ It is particularly preferable that this be the case.

[0103] [1-6. Regarding the Retaining Member Connection Ports] As shown in Figures 9(a) and (b), the outer circumference of the denture base cutting portion 22 of the mill block body 20 is provided with multiple retaining member connection ports 23, which are provided to connect and fix the mill block body 20 to the retaining member by contacting each of the multiple main body connection portions of the retaining member described later. The outer circumference of the denture base cutting portion 22 refers to the surface area of ​​the denture base cutting portion 22, including the base edge, but the retaining member connection ports 23 do not necessarily have to be provided on the base edge, and may be provided on the polishing surface side or the mucosal surface side of the base edge. From the viewpoint of stability when fixed to a dedicated holder and ease of removal when the retaining member connection ports 23 are ultimately removed by cutting, it is preferable that they be provided on the polishing surface side of the base edge.

[0104] The number of retaining member connection ports 23 is preferably 2 to 5. With only one port, stability during machining is poor, and with six or more ports, the movement of the milling bur during machining is easily obstructed. Furthermore, in the maxilla, it is preferable to have at least one retaining member connection port 23 on the buccal-labial polishing surface and at least one on the laryngeal base edge (posterior edge), and in the mandible, it is preferable to have at least two retaining member connection ports 23 on the buccal-labial polishing surface.

[0105] The shape of the multiple retaining member connection ports 23 is not particularly limited as long as it can contact the main body connection portion and fix the mill block body 20 to the retaining member, but as shown in Figures 9(a) and (b), it is preferable that they are all convex protrusions of the same shape. Furthermore, it is preferable that the material is the same as the material used for the denture base cutting portion 22. By using convex protrusions, the bonding or joining portions with the retaining member become clear, making it easier to assemble the kit in this embodiment. In addition, by having convex protrusions that can be cut from the same material as the denture base cutting portion 22, it is possible to cut the area around the retaining member connection port 23 while cutting the convex protrusions during the cutting process. Furthermore, by cutting the convex protrusions, it becomes easier to remove the denture after the cutting process is complete (so-called removal of the support portion).

[0106] It is preferable to install the multiple retaining member connection ports 23 in the following positions. That is, the mill block body 20 is placed so that the teeth are facing downwards and the teeth are in contact with a plane. The minimum and maximum heights of the base portion of the mill block body 20 in the direction perpendicular to the plane at that time are defined as the gingival thickness. Furthermore, when a plane parallel to the aforementioned plane passing through the center or vicinity of the gingival thickness is used as a reference plane, the circumference of a circle on the reference plane centered on the point obtained by orthogonally projecting the point corresponding to the centroid of the mill block body 20 onto the reference plane is divided into the same number of sectors as the number of retaining member connection ports 23 so that the length of each arc is equal. It is preferable to provide the retaining member connection ports 23 at the intersections of each dividing line (radial straight line) and the outer circumference corresponding to the buccal-lingual polishing surface including the base edge (posterior edge) of the mill block body. For example, when the number of retaining member connection ports 23 is three, it is preferable to arrange them so that the end faces of the protrusions that become retaining member connection ports 23 are perpendicular to the straight lines at the intersections with each dividing line that divides the circle into sectors with an interior angle of 120°.

[0107] In the second embodiment described later, if there are two retaining member connection ports 23, the retaining member connection ports 23 face each other at 180°, so it is preferable that the connection to the support member has a screw structure. Furthermore, in that case, a screw structure with the same tightening direction is preferable.

[0108] Furthermore, in the second embodiment described later, it is preferable that the maxillary mill block body 20A has at least one retaining member connection port 23 on the buccal-labial polishing surface and at least one on the laryngeal base edge (posterior edge), and that the mandibular mill block body 20B has at least two retaining member connection ports 23 on the buccal-labial polishing surface. In addition, it is preferable that both the maxillary and mandibular mill block bodies 20 can be held by a single dedicated holder, so it is more preferable that the number of retaining member connection ports 23 is the same for the maxillary mill block body 20A and the mandibular mill block body 20B.

[0109] The thickness (height) from the outer surface of the denture base cutting portion 22 to the tip of the convex projection is preferably 1 to 10 mm. The shape of the convex projection is not limited and can be appropriately selected from polygonal prisms such as cylinders and rectangular prisms. Furthermore, the area of ​​the part of each retaining member connection port 23 that contacts the main body connection portion of the retaining member is preferably 12 to 100 mm, for the reasons that a stable holding force can be obtained during cutting, the movement of the milling bur (cutting blade) is less likely to be obstructed during cutting, and the retaining member can be easily removed after cutting is complete. ２ , especially 19-51 mm ２ It is preferable that this be the case.

[0110] [1-7. Regarding the Holding Member] The kit of this embodiment has a holding member 30 for holding the mill block body 20 in the disc holder 4. The holding member 30 corresponds to a holder. The holding member 30 has a holder connection part 40 having a fixing and holding mechanism 41 that contacts at least a part of the disc holding frame 5 in the disc holder 4 and is detachably fixed and held in the disc holder 4, and a main body connection part 50 that contacts a plurality of holding member connection ports 23 in the mill block body 20 and is connected and fixed to the upper or lower mill block body 20.

[0111] Figures 12(a) to 12(c) show typical holding members 30 and the state in which the mill block body 20 is fixed to the holding member 30 (the assembled state of the kit of this embodiment). Figure 12 shows various forms of the holding member 30 for holding the upper jaw mill block body 20A. Figure 12(a) shows the state in which the upper jaw mill block body 20A, which has a holding member connection port 23 consisting of three convex protrusions, is fixed to a holding member 30a that can be set in a disc holder 4 having a standard disc holding mechanism 6 consisting of a recess 6a {which fits into or engages with the disc-side holding mechanism 3 consisting of a convex portion 3a as shown in Figure 1(a)}. Figure 12(b) also shows the state in which the upper jaw mill block body 20A, which has a holding member connection port 23 consisting of three convex protrusions, is fixed to the holding member 30b. Furthermore, Figure 12(c) shows a state in which a mill block body 20A for the upper jaw, which has a retaining member connection port 23 consisting of three convex protrusions, is fixed to a retaining member 30c that can be set in a disc holder 4 having a standard disc retaining mechanism 6 consisting of a protrusion 6b {which fits into or engages with the disc-side retaining mechanism 3 consisting of a recess 3b in Figure 2(a)}.

[0112] The holding member 30 is held by a disc holder 4, as shown in Figures 1 to 5, which holds the standard disc 1 described above. That is, the holding member 30 holds the mill block body 20, as shown in Figure 9, and is then held by the disc holder 4, as shown in Figures 1 to 5. Furthermore, the holding member 30a, the holding member 30b, and the holding member 30c each correspond to one embodiment of the holding member 30.

[0113] Here, the fixing and holding mechanism 41 of the holder connection part 40 is a mechanism for fixing and holding the disc holder 4 in a detachable manner to the disc holding frame 5 by contacting the disc holder 4. Specifically, it corresponds to the disc-side holding mechanism 3 consisting of a convex portion 3a or a concave portion 3b on the standard disc 1, which is a mechanism that fits or engages with the standard disc holding mechanism 6 of the disc holder 4. The holder connection part 40 may be a single unit or a combination of multiple units, as long as it has the function of holding the mill block body 20 to the disc holder 4.

[0114] As shown in Figure 12, the fixing and holding mechanism 41 has a convex portion 41a and a concave portion 41b.

[0115] If the holder connection portion 40 is a single unit, it will be an annular frame type holder connection portion 40a (see Figures 12(a) and (c)) made of an annular frame. The fixing and holding mechanism 41 of the annular frame type holder connection portion 40a (see Figure 12(a)) only needs to include at least a protrusion 41a formed on the outer circumference of the annular frame type holder connection portion 40a made of an annular frame. The protrusion 41a is identical or substantially identical to the entire protrusion 3a formed on the outer circumference 2 of the standard disc 1a corresponding to the standard disc holding mechanism 6 (recess 6a). The fixing and holding mechanism 41 of the annular frame type holder connection portion 40a (see Figure 12(c)) only needs to include at least a recess 41b formed on the outer circumference of the annular frame type holder connection portion 40a made of an annular frame. The recess 41b is identical or substantially identical to the entire recess 3b formed on the outer circumference 2 of the standard disc 1b corresponding to the standard disc holding mechanism 6 (protrusion 6b).

[0116] In the configuration shown in Figure 12(a), the annular frame holder connection portion 40a itself can be held in the recess 6a. Therefore, the annular frame holder connection portion 40a corresponds to the protrusion 41a.

[0117] When the holder connection portion 40 consists of multiple combinations, it is composed of a combination of multiple arc-shaped holder connection portions 40b having an arc-shaped outer surface. Each of the multiple arc-shaped holder connection portions 40b is one of those obtained by cutting an annular frame (i.e., an annular frame type holder connection portion 40a) vertically along its outer circumference and dividing it into a number greater than or equal to the total number of the arc-shaped holder connection portions. Each of the multiple arc-shaped holder connection portions 40b has a protrusion 41a (see Figure 12(b)) on its outer circumference that is identical or substantially identical to the entire protrusion 3a formed on the outer circumference 2 of the standard disk 1 corresponding to the standard disk holding mechanism 6. When the multiple arc-shaped holder connection portions 40b are arranged along the outer circumference of the annular frame (before cutting), the arrangement of some of the protrusions 41a present on the outer surface of each arc-shaped holder connection portion 40b corresponds to the fixed holding mechanism of the holder connection portion 40.

[0118] On the other hand, the main body connection section 50 has a support member 51 which connects and supports the holder connection section 40 and the retaining member connection port 23 of the mill block main body 20. The support member 51 is basically a rod-shaped support member 52 which has a rod shape and is connected to the holder connection section 40 at one end 51a and to the retaining member connection port 23 of the mill block main body 20 at the other end 51b.

[0119] In addition, the holder connection portion 40 and the main body connection portion 50 of the holding member 30 may be supplied as separate components and assembled together, or they may be pre-integrated (by integral molding, etc.).

[0120] The retaining member 30a in Figure 12(a) has an annular frame-type holder connecting portion 40a having the same or substantially the same outer peripheral structure as the entire protrusion 3a formed on the outer peripheral 2 of the standard disc 1 which has a disc-side retaining mechanism 3 consisting of a protrusion 3a, and three support members 51 (specifically, rod-shaped support members 52). Three support member connection ports 53 are provided inside the annular frame-type holder connecting portion 40a, and one end 51a of one of the support members 51 (rod-shaped support members 52) is connected to each support member connection port 53, and the other end 51b of each support member 51 (specifically, rod-shaped support members 52) is further connected to each retaining member connection port 23 provided on the mill block body 20A, thereby fixing the mill block body 20A for the upper jaw to the retaining member 30a.

[0121] Furthermore, the holding member 30b in Figure 12(b) consists of a combination of three members. Each of these members corresponds to a section of the annular frame cut out from the vicinity of the part of the annular frame holder connection portion 40a of the holding member 30a to which the support member 51 is connected, and each has one arc-shaped holder connection portion 40b and one support member 51 (specifically, a rod-shaped support member 52). The length of the arc of each arc-shaped holder connection portion 40b can be appropriately adjusted so as to contact and stabilize at least a part of the disc holding frame 5 of the disc holder 4a, and it is preferable to adjust it so that it includes about 1 to 30%, preferably 3 to 10%, of the annular frame holder connection portion 40a. The lengths of the arcs of each arc-shaped holder connection portion 40b may be different, but it is preferable that they be the same.

[0122] Furthermore, the retaining member 30c shown in Figure 12(c) is the same as that in Figure 12(a), except that it has one annular frame-type holder connection portion 41c which has a substantially identical outer peripheral structure to the outer peripheral 2 including the recess 3b of a standard disc having a disc-side retaining mechanism 3 consisting of a recess 3b. Note that even in a retaining member 30 having a recess 3b as shown in Figure 12(c), a configuration using an arc-shaped holder connection portion 40b as shown in Figure 12(b) may be adopted instead of the annular frame-type holder connection portion 40a.

[0123] The connection method between the retaining member connection port 23 of the mill block body 20 and the main body connection portion 50 (support member 51 or rod-shaped support member 52) of the retaining member 30, and the connection method between the holder connection portion 40 of the retaining member 30 and the main body connection portion 50 (support member 51 or rod-shaped support member 52), can be bonded using an adhesive or mechanically fitted. A powder-type polymerized resin for denture bases (PMMA-based resin) may be used as the adhesive.

[0124] The shape of the main body connection portion 50 (support member 51 or rod-shaped support member 52) of the holding member 30 is not limited and can be appropriately selected from polygonal prisms such as cylinders and square prisms. Furthermore, it is preferable that the shape and area of ​​the other end portion 51b be the same as the shape and area of ​​the end portion of the convex projection of the holding member connection port 23 of the mill block body 20.

[0125] The material of the retaining member 30 is not particularly limited, but from the viewpoint of adhesion to the mill block body 20, a resin material is preferred, and poly(meth)acrylate resin and polyester resin are particularly preferred. Furthermore, from the viewpoint of durability of the retaining member 30 and stability against vibration during cutting, a metal material is preferred, and titanium, aluminum, and stainless steel are particularly preferred. Alternatively, a retaining member made of a composite of these materials may be used.

[0126] Furthermore, the method for manufacturing the retaining member 30 is not particularly limited, and known resin or metal processing methods can be used, which can be appropriately selected depending on the material used. For example, known resin processing methods include injection molding, compression molding, casting, and stereolithography using a 3D printer, while known metal processing methods include cutting, grinding, and casting.

[0127] [1-8. Method for manufacturing complete dentures using the kit of this embodiment] The kit of this embodiment can be fixed to the disc holder 4 when assembled and in the state shown in Figure 12. Then, by setting the kit fixed to the disc holder 4 into a cutting machine in a CAD / CAM system, it becomes possible to manufacture complete dentures in the same way as conventional cutting processes using standard discs.

[0128] Specifically, the shape of the denture base 101 is designed using CAD software based on three-dimensional data of an impression of the oral cavity of an edentulous patient, three-dimensional data of an intraoral model made from the impression, three-dimensional data of the oral cavity of an edentulous patient, three-dimensional data of the complete dentures owned by the patient, and three-dimensional data of the mill block body 20 of the kit used in this embodiment. Next, the complete denture is manufactured by cutting the part of the mill block body to be cut for the denture base using CAM and a cutting machine based on the designed denture shape. Compared to denture manufacturing using a standard disc 1, the amount of material removed from the part of the denture base to be cut 22 is extremely small, which not only significantly reduces the cutting time but also drastically reduces the loss of denture base material.

[0129] [2. Second Embodiment] Next, a second embodiment of the present invention will be described. In this embodiment, a dedicated holder 60 different from the holding member 30 of the first embodiment described above is used. The dedicated holder 60 corresponds to a holding device. The dedicated holder 60 has a dedicated holder body 62 (described later) having the same external shape as the disc holder 4 in the first embodiment described above, and is held directly by the cutting machine in place of the disc holder 4.

[0130] [2-1. Dedicated Holder] Figures 13 and 14 both show the dedicated holder 60. Of these, Figure 13 schematically shows the dedicated holder 60A with the support member 61A attached, where (a) is a front view, (b) is a side view, and (c) is a cross-sectional view. Figure 14 schematically shows the dedicated holder 60B with the support member 61B attached, where (a) is a front view, (b) is a side view, and (c) is a cross-sectional view.

[0131] Furthermore, dedicated holders 60A and 60B each correspond to one embodiment of dedicated holder 60. Similarly, support members 61A and 61B each correspond to one embodiment of support member 61. Also, dedicated holder bodies 62A and 62B, described later, each correspond to one embodiment of dedicated holder body 62. Furthermore, frames 63A and 63B, described later, each correspond to one embodiment of frame 63. However, when referring to the configuration shown in Figure 13 and the configuration shown in Figure 14 collectively without distinguishing between them, they may simply be called dedicated holder 60, support member 61, dedicated holder body 62, and frame 63.

[0132] As shown in Figures 13 and 14, the dedicated holder 60 consists of a dedicated holder body 62 and a support member 61. The dedicated holder body 62 consists of a frame 63 having a setting mechanism (not shown) for mounting the dedicated holder 60 to a cutting machine, and the mill block body 20 is housed inside the frame 63.

[0133] (1) Regarding the dedicated holder body, as described above, the dedicated holder body 62 consists of a frame 63 having a setting mechanism. Here, the setting mechanism is the same as the setting mechanism in the standard disc holder 4 described above, and means a mechanism that can be attached to the cutting machine in a manner that corresponds to the structure of the cutting machine used.

[0134] The frame 63 can be, for example, an annular frame 63A, as shown in Figure 13(a), which has a predetermined thickness and a rectangular appearance, with a circular hole (holding hole) formed in the central region of the plate member. Alternatively, the frame 63 can be a C-shaped frame 63B, as shown in Figure 14(a), which has a part of the annular frame missing, resulting in a circular hole (holding hole) opening in a "C" shape.

[0135] Multiple support members 61 are arranged on the inner circumferential surface of the cylindrical hole (holding hole) of the frame 63, and the mill block body 20 is detachably fixed and held by these multiple support members 61.

[0136] The shape of the frame 63 and the hole (holding hole) provided in its central region is not particularly limited, as long as the mill block body 20 can be accommodated inside the hole via a plurality of support members 61. In other words, it is not limited to a combination of rectangle and circle as shown in Figure 13(a), but each can be appropriately selected from circular or polygonal shapes.

[0137] The size of the frame 63 and the retaining holes can be appropriately determined depending on the size of the mill block body 20 held inside, but for example, in the case of the one shown in Figure 13(a), the diameter of the circular retaining holes is about 80 to 110 mm, and the thickness of the frame 63 is about 10 to 20 mm.

[0138] For the reason that the dedicated holder 60 can be easily manufactured, it is preferable that the dedicated holder body 62 (or frame 63) has a basic structure similar to that of the standard disc holder 4 for the cutting machine used. Here, a basic structure similar to that of the standard disc holder 4 means that the structure is the same as that of the standard disc holder 4, except that the standard disc holding mechanism 6 of the standard disc holder 4 is not particularly necessary.

[0139] Furthermore, the standard disc holder 4 has a setting mechanism, so it can be used as is. Moreover, the "holding hole" formed in its center provides the necessary space for housing the mill block body 20 via the support member 61. Therefore, by using the standard disc holder 4 as the raw material material and processing a predetermined position on the inner surface of the holding hole so that one end 61a of the support member 61 (see Figures 13(a) and 14(a)) can be connected and fixed, the dedicated holder body 62 can be manufactured. For these reasons, it is preferable that the dedicated holder body 62 is made by processing the standard disc holder 4.

[0140] The method of fixing the support member 61 may be to connect and fix it by integral molding, or to connect and fix it by bonding the support member 61 to the inner wall of the frame 63, but it is more preferable that it be able to be attached and detached by a support member mounting mechanism. As a support member mounting mechanism, for example, as shown in Figure 13(b), a mechanism such as a screw mechanism can be used to fix the support member 61 at any position by passing it through a hole 63a that penetrates from the inner wall to the outer wall of the frame 63. Connecting and fixing by such a mechanism is preferable because it allows for length adjustment.

[0141] The dedicated holder bodies 62A and 62B (or frames 63A and 63A) shown in Figures 13(a) and 14(a) are examples of this type and have the same basic structure as the standard disc holder 4 shown in Figures 3 and 4. That is, they have a basic structure in which an upper fixing plate and a lower fixing plate, each having a holding hole, can sandwich and fix the cylindrical wall member 9, and a hole 63a corresponding to one end 61a of the support member 61 is provided on the inner circumferential surface of the cylindrical wall member 9. Methods for attaching such a hole 63a include processing it later using an electric drill or drill press, or manufacturing the cylindrical wall member 9 with the hole 63a from the beginning by injection molding or casting. In addition, methods for processing the inner surface of the hole 63a into a female screw structure include cutting it into a female screw structure using a cutting machine, lathe, or a dedicated tap.

[0142] The material of the frame 63 is selected from known materials, and from the viewpoint of strength and processability, it is preferably a resin such as polycarbonate or a metal such as stainless steel or aluminum. The frame 63 is manufactured using known methods. For example, it is manufactured by casting, injection molding, cutting, etc.

[0143] (2) The multiple support members 61, which are components of the dedicated support member holder 60, are for holding the mill block body 20 inside the frame 63 of the dedicated holder body 62. As shown in Figures 13(a) and 14(a), each support member 61 is connected and fixed to the dedicated holder body 62 at one end 61a. The fixing and holding mechanism formed at the other end 61b and the fixing and holding mechanisms formed at the respective end regions of the holding member connection port 23 work together to fix and hold the mill block body 20 inside the dedicated holder body 62 in a detachable manner. By employing a support member mounting mechanism that allows the length of the support member 61 to be adjusted as described above, it becomes possible to fix and hold mill block bodies 20 of different sizes for the upper jaw and / or lower jaw. As is clear from the functions of the multiple support members 61, the number of support members 61 is the same as the number of holding member connection ports 23 on the mill block body 20.

[0144] The support member 61 is preferably rod-shaped, with a preferred length of 5 to 60 mm, and its cross-sectional area is 12 to 100 mm², so as not to obstruct the movement of the milling bar (cutting blade) during machining. ２ , especially 19-51 mm ２ It is preferable that the support member 61 is cylindrical or rectangular, and can be appropriately selected from polygonal prisms, but it is preferable that the support member 61 be cylindrical when it is connected and fixed to a hole that penetrates from the inner wall to the outer wall of the frame 63 using a screw mechanism to adjust its length.

[0145] The material of the support member 61 is not particularly limited, but from the viewpoint of durability and stability and strength against vibration during machining, a metal material is preferred, and titanium, aluminum, and stainless steel are particularly preferred. Alternatively, a support member 61 made of a composite of these materials may be used. The manufacturing method of the support member 61 is not particularly limited, and known resin or metal processing methods can be used, and can be appropriately selected depending on the material and shape used.

[0146] The positions at which the support members 61 are connected and fixed to the frame 63 are preferably such that all support members 61 are at the same height in the thickness direction within the frame 63, and more preferably all support members are at the height of the center in the thickness direction of the frame 63. Furthermore, each support member 61 is fixed in a direction toward the center of the circle that serves as the reference for the arrangement of the retaining member connection port 23. By connecting and fixing the support members 61 in such orientation and position, the mill block body 20 is stably held within the dedicated holder body 62. It is preferable that the end face of the protrusion that becomes the retaining member connection port 23 is oriented perpendicular to this direction in order to stably hold the mill block body 20.

[0147] Furthermore, by matching the number of retaining member connection ports 23 on the upper and lower jaw mill block bodies 20, matching the orientation of the retaining member connection ports 23 on the upper and lower jaw mill block bodies 20 (towards the center of the circle which serves as the reference for the arrangement of the support member connection ports), and making the length of the retaining member connection ports 23 adjustable, it becomes possible to accommodate either the upper or lower jaw mill block body 20 with a single dedicated holder body 62.

[0148] [2-2. Regarding the fixing and holding mechanism] The mechanism for fixing and holding the mill block body 20 to the dedicated holder body 62 is such that the other end 61b of the support member 61 and the end region 23a of the holding member connection port 23 cooperate with each other to fix and hold the block. The fixing and holding mechanism is not particularly limited as long as it has such a function, but it is preferably one of the following (1) to (3).

[0149] (1) The fixing and holding mechanism may be a mechanism that fixes and holds by the fitting or engagement of a protrusion and / or recess formed in the end region of the holding member connection port 23 and a recess and / or protrusion formed on the other end 61b of the support member 61 that fits or engages with the protrusion and / or recess.

[0150] As a specific example, a recess is formed in the other end portion 61b of the support member 61 in FIG. 15(b), and it fits with a convex portion which is an end region 23a of the holding member connection port 23 of the mill block body 20 as shown in FIGS. 16(a) and 16(b). Further, a convex portion is formed in the other end portion 61b of the support member 61 in FIG. 15(c), and it fits with a recess which is an end region 23a of the holding member connection port 23 of the mill block body 20 as shown in FIG. 15(c). FIG. 15(a) shows a view when the mill block body 20 is fixed by a dedicated holder 60 in which the fixing and holding mechanism is a recess or a convex portion. At that time, as shown in FIG. 13(b), each support member 61 is connected and fixed through a hole 63a provided in the frame body 63, and the length can be adjusted by a screw mechanism provided on one end portion 61a side of each support member 61.

[0151] Since the support member 61 rotates, the shape of the convex portion of the other end portion 61b of the support member 61 or the end region 23a of the holding member connection port 23 is preferably a cylindrical shape, and the recesses of the other end portion 61b of the support member 61 or the end region 23a of the holding member connection port 23 are preferably in shapes that respectively fit or engage with the convex portions. Further, the area of the circle at the tip of the convex portion of the end region 23a of each holding member connection port 23, or the convex portion of the other end portion 61b of the support member 61, is preferably 3 to 40 mm ２ in order to obtain a stable holding force during cutting.

[0152] (2) The fixing and holding mechanism may be a mechanism that fixes and holds by screwing a male screw structure or a female screw structure formed in the end region 23a of the holding member connection port 23 and a male screw structure or a female screw structure that is attached to the other end portion 61b of the support member 61 so as to be rotatable forward and backward and screwing with a screw structure that screws with them, respectively.

[0153] As a specific example, a male screw is formed on the other end 61b of the support member 61 in Figure 17(b), and it screws into the female screw in the end region 23a of the retaining member connection port 23 of the mill block body 20, as shown in Figure 18(a). Also, a female screw is formed on the other end 61b of the support member 61 in Figure 17(c), and it screws into the male screw in the end region 23a of the retaining member connection port 23 of the mill block body 20, as shown in Figure 18(b). Furthermore, Figure 17(a) shows the mill block body 20 fixed with a dedicated holder 60 whose fixing and holding mechanism is a male screw or a female screw. The screw structure formed in the end region 23a of the retaining member connection port 23 and the other end 61b of the support member 61 may be the entire structure or only the screwed portion.

[0154] A male screw has a spiral thread on the outer circumference of a cylinder, with a triangular cross-section. A female screw has a thread on the inner surface of a hole. Types of screws include triangular screws, trapezoidal screws, square screws, and ball screws, but there are no particular restrictions on the type of screw as long as it can stably fix and hold the mechanism.

[0155] The length of the portion where the male or female screw structure formed in the end region 23a of the retaining member connection port 23 and the screw structure that engages with the formed male or female screw structure, which is pivotably attached to the other end 61b of the support member 61 so as to be able to move back and forth, are screwed together, is such that a stable retaining force can be obtained during machining, so the diameter of the male or female screw structure is preferably 2 to 10 mm.

[0156] (3) The fixing and holding mechanism may consist of a plunger mechanism attached to the other end 61b of the support member 61 and a receiving structure formed in the end region 23a of the holding member connection port 23 that fixes the position where the pin of the plunger mechanism contacts, and each of these can be used to fix and hold by contact. As an example of the plunger structure, a spring is built into the plunger body so that when a load is applied the ball or pin at the tip sinks into the body and returns to its original position by the force of the spring when the load is released.

[0157] As a specific example, a plunger is formed at the other end 61b of the support member 61 in Figure 19(b), and as shown in Figure 20, it fits into a recess, which is a receiving structure in the end region 23a of the holding member connection port 23 of the mill block body 20. Also, Figure 19(a) shows the mill block body 20 fixed with a dedicated holder 60 in which the fixing and holding mechanism is a plunger.

[0158] The type of plunger attached to the other end 61b of the support member 61 is not particularly limited as long as it is a mechanism that can stably fix and hold. For example, it can have a ball-shaped tip, a pin-shaped tip, or a positioning function such as an angle indexing or sliding mechanism. Furthermore, the shape of the receiving structure of the holding member connection port 23 is preferably a concave shape, such as a cone, prism, or hemisphere.

[0159] The area of ​​the receiving structure formed in the end region 23a of the retaining member connection port 23, which contacts the plunger mechanism attached to the other end 61b of the support member 61, is 3 to 40 mm in size, in order to obtain a stable holding force during machining. ２ It is preferable that this be the case.

[0160] [2-3. Method for manufacturing complete dentures using the kit of this embodiment] As shown in Figures 15(a), 17(a), and 19(a), the kit of this embodiment has the mill block body 20 fixed to the support member 61, and the mill block body 20 is fixed to the dedicated holder 60 via the support member 61 and then set in a cutting machine in a CAD / CAM system. This makes it possible to manufacture complete dentures in the same way as conventional cutting using standard discs.

[0161] Specifically, the shape of the denture base 101 is designed using CAD software based on three-dimensional data of an impression of the oral cavity of an edentulous patient, three-dimensional data of an intraoral model made from the impression, three-dimensional data of the oral cavity of an edentulous patient, three-dimensional data of the complete dentures owned by the patient, and three-dimensional data of the mill block body 20 of the kit used in this embodiment. Next, the complete denture is manufactured by cutting the part of the mill block body 20 to be cut for the denture base using CAM and a cutting machine based on the designed denture shape. Since the mill block body 20 can be directly attached to the dedicated holder 60, the amount of material removed from the part of the denture base to be cut 22 is extremely small compared to denture manufacturing using the standard disc 1, so not only is the cutting time significantly reduced, but the loss of denture base material is also extremely small.

[0162] [3. Mounting Position and Orientation of the Mill Block Body] When attaching the mill block body 20 to the retainer (retaining member 30, dedicated holder 60) in each of the embodiments described above, it is preferable to attach the mill block body 20 to the retainer (retaining member 30, dedicated holder 60) in the following position and orientation. Figure 21 is a side view showing the mill block body 20 (mill block body 20A for the upper jaw), and Figure 22 is a diagram showing the preferred position and orientation when attaching the mill block body 20 (mill block body 20A for the upper jaw) to the retainer (retaining member 30, dedicated holder 60).

[0163] First, the center of gravity G of the mill block body 20 for the upper or lower jaw is determined. Here, the center of gravity G of the mill block body 20 is determined using CAD software based on the 3D data of the mill block body 20.

[0164] The center of gravity G described above is to be contained within the inner and vertical width of the frame (disc holding frame 5, frame 63) of the holder (holding member 30, dedicated holder 60). Also, as shown in Figure 22, the surface including the upper surface of the frame (disc holding frame 5, frame 63) is defined as surface A, and the surface including the lower surface is defined as surface B. Furthermore, the plane C1 is defined as the plane including the midpoint between the mesial angles of the left and right maxillary central incisors (point O' in Figure 10) and the distal buccal cusp tips of the left and right maxillary second molars of the mill block body 20 for the maxilla or mandible. Note that this plane C1 corresponds to the "maxillary reference plane" or "mandibular reference plane" described above.

[0165] Furthermore, as shown in Figure 21, surface C2 is defined as the surface that includes the center of gravity G of the maxillary or mandibular mill block body 20 and the buccal polishing surface of the denture base cutting portion 22 of the mill block body 20 (i.e., not the artificial dentition portion 21). In Figure 21, unsuitable surfaces for surface C2 are shown with dashed lines, and suitable surfaces are shown with solid lines.

[0166] Then, the upper or lower jaw mill block body 20 is positioned horizontally such that the plane B and plane C1 are parallel, or the plane B and plane C2 are parallel. In this positional relationship, the preferred position of the retaining member connection port 23 and support members 51, 61 is such that the retaining member connection port 23 and support members 51, 61 are located on a line (let's call this line line M1) that passes through the center of gravity G of the mill block body 20 and intersects the frame (disk holding frame 5, frame 63) parallel to planes A and B. Note that Figure 22 shows the state in which the retaining member connection port 23 is located on line M1, but the support members 51, 61 are not shown. Furthermore, the respective retaining member connection ports 23 and support members 51, 61 are positioned such that they have equal central angles (for example, if there are three retaining member connection ports 23 as shown in Figure 9, the central angle is 120 degrees).

[0167] In this state, the distance between the retaining member connection port 23 and the inner casing of the frame (disk retaining frame 5, frame 63) on the line M1 described above is preferably 3 mm to 30 mm, and more preferably 5 mm to 25 mm.

[0168] As described above, the optimal mounting position and orientation of the mill block body 20 relative to the holder (holding member 30, dedicated holder 60) is determined.

[0169] [4. Examples] Examples and comparative examples will be given to specifically describe the first and second embodiments of the present invention, but the present invention is not limited in any way by these. Although the holders differ in the mill block kits for complete dentures according to the first and second embodiments of the present invention, the mill block body 20 is common to both, so the first embodiment will be used for the following description.

[0170] [4-1. Preparation of the cutting machine and disc holder] A DWX-52D (manufactured by DGSHAPE) was used as a "cutting machine" capable of processing mill blocks using a CAD / CAM system. In addition, a disc material adapter ZMA-52DC-6 (manufactured by DGSHAPE), which is attached to the above cutting machine, was used as a "disc holder" 4 capable of holding a standard disc 1a, which is a disc-shaped denture mill block with a protrusion formed on its outer circumference as shown in Figure 1(a). The disc holding frame 5 of the disc holder 4 can be fitted into a disc-side holding mechanism 3a (outer diameter 98.5 mm - inner diameter φ94 mm = 4.5 mm width, thickness 10 mm annular protrusion) provided on the outer circumference of the cylindrical standard disc 1a with a diameter of Φ94 mm.

[0171] For the milling burrs (cutting blades) used in the cutting machine, we used Yamahachi CAD / CAM milling burrs DLC coated 2φ2mm and φ0.8mm, manufactured by Yamahachi Tooth Materials Industry Co., Ltd.

[0172] [4-2. Preparation of the Mill Block Body] To manufacture the mill block body 20 using a 3D printer, CAM, and cutting machine, a predetermined mill block shape can be obtained by processing it with a 3D printer or cutting machine based on three-dimensional shape data (hereinafter also referred to as 3D shape data) that reflects the shape of the mill block body created with dental CAD.

[0173] In the first and second embodiments of the present invention, 3D shape data of a desired maxillary mill block body 20A was designed, and a master model was manufactured using a 3D printer based on the designed 3D shape data. Next, the master model coated with a release agent was placed with the teeth facing upward, and half of the master model was embedded in silicone resin and hardened to form the first split mold. After that, a release agent was applied to the upper surface of the hardened first split mold, and then the entire master model was embedded in silicone resin and hardened to produce a separable silicone mold that reflects the outer shape of the master model. Multiple sprues are provided in the split mold as appropriate.

[0174] Next, a total of 14 artificial teeth 12, numbered 1 to 7 on both the left and right sides, were set into grooves corresponding to the artificial dentition section 21A inside the silicone mold. The artificial teeth 12 had root portions (the parts that would ultimately be embedded in the denture base 101), and hard resin teeth with retention holes in the root portions were used. Then, powder and liquid materials of a heat-curing resin for denture bases (Matsukaze Co., Ltd., Fit Resin), mainly composed of PMMA resin, were mixed and poured into the silicone mold and polymerized under pressure and heat. After polymerization was complete, the silicone mold was divided to obtain a maxillary mill block body 20A in which a portion of the artificial teeth was embedded in the denture base cutting section 22A.

[0175] Table 1 shows the size and volume of the machined portion 22A for the denture base and the arrangement pattern of the artificial tooth arrangement portion 21A of the maxillary mill block body 20A manufactured using the method described above. Table 2 shows the number, position, and shape of the retaining member connection ports 23 of the manufactured maxillary mill block body 20A. In the table, "nearby" refers to a position 7 mm from the center of the buccal cervical portion of each artificial tooth.

[0176] Furthermore, the mandibular mill block body 20B was manufactured using the same method as for the maxilla. The size and volume of the denture base cutting portion 22B and the arrangement pattern of the artificial tooth arrangement portion 21B of the manufactured mandibular mill block body 20B are shown in Table 3, and the number, position, and shape of the retaining member connection ports 23 are shown in Table 4.

[0177]

[0178]

[0179]

[0180]

[0181] [4-3. Preparation of the Holder] A holder in the form shown in Figure 12(a) was manufactured as the holding member 30a (holder) for the upper jaw mill block body 20A. Specifically, an annular frame-shaped holder connection part 40a (outer diameter 98.5 mm - inner diameter φ94 mm = 4.5 mm width, thickness 10 mm) substantially equivalent to the outer circumference 2 of the standard disc 1a in Figure 1(a) was designed using CAD. In addition, each (rod-shaped) support member 52 that matches the number, position and shape of the support member connection port 23 in Table 2 was designed inside the holder connection part 40a. Based on the above 3D shape data, the holding member 30a was manufactured using a stereolithography 3D printer and stereolithography resin.

[0182] Furthermore, the retaining member 30b (retainer) of the mandibular mill block body 20B was designed similarly to the one for the maxilla, with each (rod-shaped) support member 52 positioned inside the holder connection portion 40a to match the number, position, and shape of the retaining member connection ports 23 shown in Table 4.

[0183] [4-4. Assembly of the Mill Block Kit for Complete Dentures] To bond the retaining member connection port 23 of the obtained maxillary or mandibular Mill Block body 20 to the body connection portion 50 of the retaining member 30, a powder-type polymer resin for denture bases (Tokuyama Dental Co., Ltd., Cure Grace) was mixed and applied to both bonding surfaces and cured to bond them. Excess material applied during bonding was wiped off before complete curing to obtain a uniform (single) structure.

[0184] [4-5. Fabrication of complete dentures using a complete denture mill block kit] In Example 1, a plaster model of the oral cavity was prepared from an impression of the maxilla of an edentulous patient. On each plaster model, the outline of the complete denture (the outline corresponding to the margin to posterior margin of the complete denture) was drawn in pencil, referring to anatomical reference points. 3D data of the plaster models was obtained by scanning the plaster models with a 3D scanner (dentalwings, dentalwings 7 series). The obtained 3D data of the plaster models was imported into dental CAD, and the 3D shape of the denture base 101 of the complete denture, which conforms to the shape of the plaster model, was designed according to standard procedures. At that time, the arrangement of the artificial teeth 12 of the designed complete denture was based on 3D data substantially equivalent to the artificial tooth arrangement pattern in Table 1, which was imported into dental CAD beforehand (master data of the artificial tooth arrangement pattern) and placed in the appropriate position on the denture base.

[0185] Next, 3D data was acquired using the 3D scanner described above for the kit, which integrated the mill block body 20A and the holding member 30a for the upper jaw of Example 1. In order to calculate the machining path (the path the milling bur travels) using CAM, the acquired 3D data of the kit's shape was imported into dental CAM, and the kit's shape was registered in CAM as the reference shape of the object to be cut (master data of the kit's shape before machining). Furthermore, the integrated kit was held in the disc holder 4 of the machining machine and attached to the machining machine.

[0186] Next, the 3D data of the complete denture (3D data of the cut part) created with the above dental CAD was imported into the dental CAM. In the dental CAM, the cutting position was set so that the three-dimensional spatial coordinates of the artificial dentition part of the master data of the 3D shape of the above kit (3D data of the cut part) matched the three-dimensional spatial coordinates of the artificial dentition part of the 3D data of the complete denture to be made (3D data of the cut part). By setting it as described above, the difference between the 3D data of the cut part and the 3D data of the cut part is calculated as the processing area, and only the cut part 22A for the denture base of the mill block body 20A is processed.

[0187] Next, the machining path (the path of the milling bur) was calculated using dental CAM software, and the mill block body 20A was machined using a cutting machine based on the machining path.

[0188] This procedure was performed on 20 plaster models of the oral cavity obtained from impressions of the maxilla of 20 edentulous patients. For the 20 maxillary complete dentures that were fabricated, the average cutting time, average utilization rate, and fit rate were evaluated as described below.

[0189] [4-6. Average Cutting Time] The time [minutes] taken from the start to the end of cutting the denture base cutting portion 22A of the mill block body 20A using a cutting machine was measured. The average of 20 complete dentures was defined as the "average cutting time". Average cutting time [minutes] = Sum of processing times for each complete denture / 20

[0190] [4-7. Average Value of Effective Utilization Rate] The volume of the denture base of the complete denture to be fabricated was confirmed using the dental CAD software described above. The effective utilization rate was calculated as the ratio [%] of the volume of the denture base to be fabricated to the volume of the denture base cutting section 22A of the mill block body 20A, using the following formula (Equation 1). Furthermore, the effective utilization rate was calculated for each of the 20 complete dentures to be fabricated, and the average of these calculations was taken as the "average effective utilization rate" in the following formula (Equation 2). It is preferable that the average effective utilization rate be 25% or higher from the viewpoint of reducing cutting time and the amount of material used in the cutting section. Effective utilization rate "%" = (Volume of the denture base of the complete denture to be fabricated / Volume of the cutting section of the mill block body) × 100 (Equation 1) Average effective utilization rate [%] = Sum of the average effective utilization rates of each complete denture (20 in total) [%] / 20 (Equation 2)

[0191] [4-8. Fit Rate] A silicone-based fit test material (Tokuyama Dental Co., Ltd., Fit Tester) was applied to the mucosal surface and base margin of the fabricated complete denture to a uniform thickness. The surface coated with the fit test material was pressed against the plaster model used in the design of the fabricated complete denture, and the fit of the denture was judged as follows.

[0192] Fit: There are no areas on the mucosal surface where the fit test material is 1 mm or thicker. And there are no areas where the distance between the outline of the complete denture marked on the plaster model and the margin of the fabricated complete denture is 1 mm or more. Non-fit: There are areas on the mucosal surface where the fit test material is 1 mm or thicker. And / or there are areas where the distance between the outline of the complete denture marked on the plaster model and the margin of the fabricated complete denture is 1 mm or more.

[0193] This evaluation was performed on each of the 20 complete dentures that were fabricated, and the fit rate was calculated using the following formula (Equation 3). A fit rate of 90% or higher is preferable. Fit Rate [%] = (Total number of dentures evaluated / 20) × 100 (Equation 3)

[0194] Table 5 shows the evaluation results for each of the complete dentures in Example 1. Table 5 also shows the evaluation results for each of the complete dentures in Example 1 when using a standard disc 1a (φ94 mm, thickness 35 mm) as a reference example. In reference example 1, the design denture base 101, the support section (corresponding to each rod-shaped support member 52 in Example 1; the design was adjusted to a length that could be held as needed), and the standard disc 1a were machined so that a 5 mm area inside the outer circumference 2 remained. Example 1 required less machining time than when a complete denture was manufactured using the conventional standard disc 1a in reference example 1. Furthermore, the average effective utilization rate was improved, enabling more efficient manufacturing.

[0195] Examples 2 to 5 were evaluated in the same manner as Example 1. The results are shown in Table 5. As the dimensions (volume) of the machined portion 22A for the denture base decrease, the average machining time decreases and the average utilization rate increases. Comparative Example 1, as shown in Table 1, has larger dimensions and volume than the preferred mill block body 20A for the maxilla. Therefore, the average utilization rate is slightly unsatisfactory. Comparative Example 2, as shown in Table 1, has smaller dimensions and volume than the preferred mill block body 20A for the maxilla. Therefore, the fit rate is slightly unsatisfactory.

[0196]

[0197] Furthermore, kits according to the first and second embodiments, using the mandibular mill block body 20B, were evaluated in the same manner as for the maxillary version. The results are shown in Table 6. In Reference Example 2, the designed denture base 101, support section (corresponding to each rod-shaped support member 52 in Example 6; the design was adjusted to a length that could be held as needed), and the standard disc 1a were machined so that a range of 5 mm inside the outer circumference 2 remained. Examples 6 to 10 had shorter cutting times than when a complete denture was made using the conventional standard disc 1a of Reference Example 2. In addition, the average effective utilization rate was also improved.

[0198] Examples 7 to 10 were evaluated in the same manner as Example 6. The results are shown in Table 6. As the dimensions (volume) of the machined portion 22B for the denture base decrease, the average machining time decreases and the average utilization rate increases. Comparative Example 3, as shown in Table 3, has larger dimensions and volume than the mandibular mill block body 20A. Therefore, the average utilization rate is slightly unsatisfactory. Comparative Example 4, as shown in Table 3, has smaller dimensions and volume than the mandibular mill block body 20A. Therefore, the fit rate is slightly unsatisfactory.

[0199]

[0200] [5. Addendum] The contents of each embodiment described above can be understood as follows, for example: [1] That is, a mill block kit for complete dentures for manufacturing dentures using a milling machine and a CAD / CAM system, the mill block kit for complete dentures comprises a mill block body for the upper jaw or lower jaw to be milled, and a holder (holding member 30, dedicated holder 60) for holding the mill block body, the mill block body 20 comprises an artificial dentition section 21 for the upper jaw or lower jaw made of artificial tooth material, and a denture base cutting section 22 for the upper jaw or lower jaw made of denture base material that fixes the artificial dentition section 21, the outer circumference of the denture base cutting section 22 for the upper jaw or lower jaw of the mill block body 20 of the upper jaw or lower jaw is provided with a plurality of holding member connection ports 23, the holder (holding member 30, dedicated holder 60) The mill block body 20 for the upper jaw or lower jaw is surrounded by an outer peripheral base portion (annular frame type holder connection portion 40a, arc type holder connection portion 40b, frame 63), and the mill block body 20 is connected to a plurality of holding member connection ports 23 and fixed to the mill block body 20 for the upper jaw or lower jaw, and is also connected to the outer peripheral base portion (annular frame type holder connection portion 40a, arc type holder connection portion 40b, frame 63) to support the mill block body 20.

[0201] This configuration makes it possible to efficiently fabricate complete dentures using a milling machine when fabricating complete dentures with a CAD / CAM system. In addition, instead of the standard disc 1, the mill block body 20 shown in Figure 9 can be held in the milling machine using a holder (holding member 30, dedicated holder 60). Therefore, compared to denture fabrication using the standard disc 1, the amount of material removed from the mill block body 20 is extremely small, so the milling time can be significantly reduced. Furthermore, the loss of denture base material can be reduced.

[0202] [2] In addition to the contents described in [1] above, the holder (holding member 30) is held in a disc holder 4 that can hold a standard disc 1, which is a disc-shaped mill block having a predetermined diameter and thickness and having a convex or concave portion formed on its outer circumference, while holding the mill block body 20, and the disc holder 4 has a disc holding frame 5 that is equipped with a standard disc holding mechanism 6 which is adapted to the outer circumference shape of the standard disc 1, which is a disc-shaped mill block having a predetermined diameter and thickness and having a convex or concave portion formed on its outer circumference, and has a concave or convex portion that fits or engages with the convex or concave portion, The holder (holding member 30) preferably has a holder connection portion 40 having a fixing and holding mechanism 41 that contacts at least a part of the disc holding frame 5 of the disc holder 4 and is detachably fixed and held in the disc holder 4, and a body connection portion 50 that contacts a plurality of holding member connection ports 23 of the mill block body 20 and is connected and fixed to the upper jaw or lower jaw mill block body 20, and thereby fixes and holds the upper jaw or lower jaw mill block body 20 in a predetermined position within the disc holding frame 5 of the disc holder 4.

[0203] In this configuration, the mill block body 20 can be fixed and held by the disc holder 4 using the main body connection portion 50 of the holder (holding member 30) which is held by the holder connection portion 40. Therefore, the mill block body 20 can be held by the holder (holding member 30), the (holding member 30) can be held by the disc holder 4, and the disc holder 4 can be further held by the cutting machine.

[0204] [3] In addition to the contents described in [2] above, in the above embodiment, it is preferable that the main body connection portion 50 includes the same number of support members 51 as the number of retaining member connection ports 23, with one end 51a of each support member 51 connected to the holder connection portion 40 and the other end 51b connected to each retaining member connection port 23 of the mill block main body 20.

[0205] With this configuration, the mill block body 20 can be securely held by the holding member 30 via the support member 51.

[0206] [4] In addition, in the above embodiment, it is preferable that the holder connection portion 40 consists of an annular frame type holder connection portion 40a made of an annular frame, and the fixing and holding mechanism 41 of the annular frame type holder connection portion 40a consists of a convex portion 41a or concave portion 41b which is the same as the entire convex portion 3a or concave portion 3b formed on the outer circumference of the standard disc 1 corresponding to the standard disc holding mechanism 6, which is formed on the outer circumference of the annular frame.

[0207] In this configuration, similar to the standard disc 1, the annular frame-shaped holder connection portion 40a of the holder (holding member 30) can be easily held in the disc holder 4.

[0208] [5] In addition, in the above embodiment, in addition to the contents described in any of [2] to [4] above or a combination thereof, it is preferable that the holder connection portion 40 is made up of a combination of a plurality of arc-shaped holder connection portions 40b having an arc-shaped outer surface, and each of the plurality of arc-shaped holder connection portions 40b is a single annular frame having a convex portion 41a or recess 41b on its outer surface that is the same or substantially the same as the entire convex portion 3a or recess 3b formed on the outer circumference of the standard disc 1 corresponding to the standard disc holding mechanism 6, and is cut vertically along its outer circumference to divide it into a number greater than or equal to the total number of arc-shaped holder connection portions 40b, and has a part of the convex portion 41a or recess 41b formed on the outer circumference of the annular frame on its arc-shaped outer surface, and the arrangement of a part of the convex portion 41a or recess 41b present on the outer surface of each arc-shaped holder connection portion 40b formed when the plurality of arc-shaped holder connection portions 40b are lined up along the outer circumference of the annular frame becomes the fixed holding mechanism 41 of the holder connection portion 40.

[0209] With this configuration, the mill block body 20 can be securely held using multiple arc-shaped holder connection parts 40b.

[0210] [6] In addition, in the above embodiment, in addition to the contents described in any of [2] to [5] above or a combination thereof, it is preferable that the plurality of retaining member connection ports 23 located on the outer circumference of the cut-to-machine portion 22 for the maxillary or mandibular denture base form convex protrusions that can be machined from the same material as the cut-to-machine portion 22 for the denture base.

[0211] In this configuration, the mill block body 20 can be held by the holder connection portion 40 of the holding member 30 via the holding member connection port 23 which has a convex projection.

[0212] [7] In addition, in the above embodiment, in addition to the contents described in any of [2] to [6] above or a combination thereof, the denture base cutting portion 22 of the maxillary or mandibular mill block body 20 which is substantially the shape of a complete denture base has parts corresponding to the polished surface, mucosal surface, base margin which is the boundary between the polished surface and the mucosal surface, and base wing of the complete denture, and in the artificial dentition portion 21 of the maxillary or mandibular mill block body 20 artificial teeth corresponding to teeth 1 to 7 on the left and right, which have a standard size and shape, are arranged in a standard arrangement pattern, and a part of each artificial tooth of the artificial dentition portion 21 is embedded in the maxillary or mandibular denture base cutting portion 22 so as to form a standard cervical area and expose the crown, and at least the part from the coronal papilla to the cervical area forms a gingival region which has a standard shape. Preferably, the area of ​​the cut-to-machine portion 22 of the denture base for the upper or lower jaw, excluding the gingival region corresponding to the coronal papilla and gingival cervical region, is larger than the morphology of a standard complete denture.

[0213] In this configuration, by using a mill block body 20 for the upper or lower jaw that is roughly the shape of a complete denture, the amount of material removed from the mill block body 20 becomes extremely small. Therefore, the machining time can be significantly reduced. In addition, the loss of denture base material can be reduced.

[0214] [8] In addition to the contents described in [1] above, the holder is a dedicated holder 60 that is directly held by the cutting machine instead of a disc holder 4 that can hold a standard disc 1 which is a disc-shaped mill block having a predetermined diameter and thickness and having a convex or concave portion formed on its outer circumference, while holding the mill block body 20, the dedicated holder 60 has the same number of support members 61 as the holding member connection ports 23 and a dedicated holder body 62, the dedicated holder body 62 is equipped with a "set mechanism" for detachably attaching it to the cutting machine and has a frame 63 inside that can accommodate the mill block body 20, each of the support members 61 is connected and fixed to the dedicated holder body 62 at one end, and a fixing and holding mechanism is formed at the other end 61b of each of the support members 61 and at the end regions 23a of each of the holding member connection ports 23, which work together to detachably fix and hold the mill block body 20 inside the dedicated holder body 62.

[0215] In this configuration, the mill block body 20 can be fixed and held in a dedicated holder 60 instead of the disc holder 4. At that time, the dedicated holder body 62, which has the same external dimensions as the disc holder 4, can be well attached to the cutting machine, and the mill block body 20 can be well set in the cutting machine via this dedicated holder 60. In addition, the mill block body 20 can be well attached to the dedicated holder body 62 via the support member 61.

[0216] [9] In addition, in the above embodiment, in addition to the contents described in [8] above, the cutting machine is a cutting machine equipped with a disc holder 4 having a disc holder frame that has a standard disc holding mechanism 6 and a setting mechanism for holding the standard disc 1 in the holder which is a disc-shaped mill block having a predetermined diameter and thickness and having a convex portion 3a or a concave portion 3b formed on its outer circumference, the holder which is adapted to the outer circumference shape of the standard disc 1 and has a concave portion or convex portion that fits or engages with the convex portion 3a or concave portion 3b, and the dedicated holder body 62 is preferably equipped with a support member mounting mechanism (hole 63a) attached to the disc holder 4 so that each support member 61 can be attached to the disc holder 4.

[0217] In this configuration, the dedicated holder body 62 can be detachably fitted with each support member 61 via a support member mounting mechanism (hole 63a). Therefore, even if a particular support member 61 is damaged, for example, the dedicated holder 60 can continue to be used by replacing it with a new support member 61. Furthermore, by using support members 61 of different sizes, the dedicated holder 60 can hold mill block bodies 20 of various sizes.

[0218]

[10] In addition, in the above embodiment, in addition to the contents described in [8] or [9] above, it is preferable that the fixed holding mechanism consists of: (1) a convex and / or concave portion formed in the end region 23a of the holding member connection port 23 and a concave and / or convex portion formed in the other end 61b of the support member 61 that fits into or engages with the convex and / or concave portion; (2) a male screw structure or female screw structure formed in the end region 23a of the holding member connection port 23 and a screw structure that screws into a male screw structure or female screw structure that is pivotably attached to the end region 23a of the support member 61 so as to be able to move back and forth; or (3) a plunger mechanism attached to the other end 61b of the support member 61 and a receiving structure that fixes the position to which the pin of the plunger mechanism abuts, formed in the end region 23a of the holding member connection port 23.

[0219] In this configuration, the end region 23a of the retaining member connection port 23 can be securely attached to the support member 61. This allows the mill block body 20 to be securely held in the dedicated holder 60.

[0220]

[11] In addition, in the above embodiment, in addition to the contents described in any of [8] to

[10] above or a combination thereof, the denture base cutting portion 22 of the maxillary or mandibular mill block body 20 which is substantially the shape of a complete denture base has parts corresponding to the polished surface, mucosal surface, base margin which is the boundary between the polished surface and the mucosal surface, and base wing of the complete denture, and in the artificial dentition portion 21 of the maxillary or mandibular mill block body 20 artificial teeth corresponding to teeth 1 to 7 on the left and right, which have a standard size and shape, are arranged in a standard arrangement pattern, and a part of each artificial tooth of the artificial dentition portion 21 is embedded in the maxillary or mandibular denture base cutting portion 22 such that a part of each artificial tooth of the artificial dentition portion 21 forms a standard cervical area and the crown is exposed, and at least the part from the coronal papilla to the cervical area forms a gingival region which has a standard shape. Preferably, the area of ​​the cut-to-machine portion 22 of the denture base for the upper or lower jaw, excluding the gingival region corresponding to the coronal papilla and gingival cervical region, is larger than the morphology of a standard complete denture.

[0221] In this configuration, by using a mill block body 20 for the upper or lower jaw that is roughly the shape of a complete denture, the amount of material removed from the mill block body 20 becomes extremely small. Therefore, the machining time can be significantly reduced. In addition, the loss of denture material can be reduced.

[0222] [6. Modifications] In the first embodiment described above, the mill block body 20 and the holding member 30 are integrated, and the holding member 30 may have a frame that is an annular or arc-shaped body equivalent to that of the holding member 30. In this case, the holding member connection port 23 and the body connection part 50 are integrated. That is, the holding member connection port 23 and the body connection part 50 may be an integrated configuration, or they may be separate configurations.

[0223] Furthermore, in the first and second embodiments described above, the retaining member connection port 23 is provided in a convex shape that protrudes from the machined portion 22 of the denture base. However, the retaining member connection port may also be concave, recessed relative to the machined portion 22 of the denture base. In this case, the mill block body 20 is held by the retaining member 30 or the dedicated holder 60 by inserting the support member 51 or support member 61 into the concave retaining member connection port. In this case, in the first embodiment, if the support member 51 is separate from the retaining member connection port 23, the support member 51 will be inserted into the concave retaining member connection port. It is also preferable to fill the concave retaining member connection port with a filler after the denture 100 has been manufactured, so that it has the same shape as the other parts of the denture base 101 without any irregularities.

[0224] Furthermore, the form of the retaining member connection port 23 in the first and second embodiments described above can be anything. However, as for the form of the retaining member connection port 23, it is also possible to adopt a form in which the base portion on the side of the denture base to be cut 22 is thicker than the outer diameter portion (the tip side of the retaining member connection port 23) than the base. In this case, even if the tool accidentally touches the base of the retaining member connection port 23 during machining with a cutting machine, there will be a material to be removed due to the thickness of the base, thus preventing the mill block body 20 from falling off the support member 51 or support member 61.

[0225] Furthermore, in the first embodiment described above, the outer circumference of the retaining member 30 is circular or part of an arc (see Figure 12). Also, in the first embodiment described above, the outer circumference of the standard disk 1 is circular or part of an arc (see Figure 1). However, the outer circumference of the retaining member 30 may be elliptical or part of an ellipse. Also, the outer circumference of the standard disk 1 may be elliptical or part of an ellipse.

[0226] Thus, even if the outer circumference of the holding member 30 is elliptical or partially elliptical, and even if the outer circumference of the standard disc 1 is elliptical or partially elliptical, it is sufficient as long as the disc holder 4 that holds them can maintain an elliptical shape.

[0227] In this case, the circumferential position of the retaining member 30 and the standard disc 1 relative to the disc holder 4 can be easily determined. In particular, when the retaining member 30 and the standard disc 1 are held in a semi-circular compatible disc holder 4b as shown in Figure 4, the retaining member 30 and the standard disc 1 become less likely to rotate relative to the disc holder 4, unlike in the case of a circular disc, making it easy to determine the circumferential position of the retaining member 30 and the standard disc 1 relative to the disc holder 4.

[0228] In Figure 14, the dedicated holder 60B is configured to have an inner circumference greater than 180 degrees, exceeding half a turn. However, it is preferable that the half-outer circumference compatible disc holder 4b shown in Figure 4 also has an inner circumference greater than 180 degrees, exceeding half a turn. In this case, for example, it becomes easier to position the two support members 51 and 61 at 180-degree opposing positions.

[0229] Furthermore, in particular, the mandibular mill block body 20B has an external shape that is roughly V-shaped. Therefore, it is preferable to provide three sets of retaining member connection ports 23 and support members 51, 61, and to position these three sets of retaining member connection ports 23 and support members 51, 61 in the area closest to the holder connection portion 40 and the inner circumference of the frame 63.

[0230] Furthermore, in the first and second embodiments described above, it is preferable that the retaining member connection port 23 and the support members 51 and 61 be at the same height within the retainer (retaining member 30, dedicated holder 60). In this case, by adjusting the inclination angle of the mill block body 20 with respect to the horizontal plane, it is possible to adjust the arrangement angle of the mill block body 20 so that the length of the support members 51 and 61 is shortened. This makes it possible to improve stability during cutting, such as by reducing vibration in the mill block body 20 during cutting with a cutting machine.

[0231] 1, 1a, 1b...Standard disc, 2...Outer circumference, 3...Disc-side holding mechanism, 3a...Convex part, 3b...Concave part, 4...Disc holder, 4a, 4c...Full outer circumference compatible disc holder, 4b...Half outer circumference compatible disc holder, 5...Disc holding frame, 6...Standard disc holding mechanism, 6a...Concave part, 6b...Convex part, 7...Upper fixing plate, 8...Lower fixing plate, 9...Cylindrical wall member, 10...Reference denture, 10A...Reference denture for the upper jaw, 10 B... Mandibular standard denture, 11... Standard denture base, 12, 12A, 12B... Artificial teeth, 13... Mucosal surface, 14... Base wing, 20... Mill block body, 20A... Maxillary mill block body, 20B... Mandibular mill block body, 21... Artificial dentition section, 21A... Maxillary artificial dentition section, 21B... Mandibular artificial dentition section, 22... Cutting section for denture base, 22A... Cutting section for maxillary denture base, 22B... Cutting section for mandibular denture base 23...Holding member connection port, 23a...End region, 30...Holding member, 30a, 30b, 30c...Holding member, 40...Holder connection part, 40a...Annular frame type holder connection part, 40b...Arc type holder connection part, 41...Fixed holding mechanism, 41a...Convex part, 41b...Concave part, 41c...Annular frame type holder connection part, 50...Main body connection part, 51...Support member, 51a...One end, 51b...Other end, 52...Rod-shaped support part Material, 53...Support member connection port, 60, 60A, 60B...Dedicated holder, 61, 61A, 61B...Support member, 61a...One end, 61b...Other end, 62, 62A, 62B...Dedicated holder body, 63, 63A, 63B...Frame, 63a...Hole, 100...Denture, 100A...Maxillary denture, 100B...Mandibular denture, 101...Denture base, 101A...Maxillary denture base, 101B...Mandibular denture base, 102...Preparation member

Claims

A mill block kit for complete dentures, for fabricating dentures using a cutting machine and a CAD / CAM system, The aforementioned complete denture mill block kit comprises a mill block body for the upper or lower jaw to be machined, and a holder for holding the mill block body. The mill block body comprises an artificial dentition section for the upper or lower jaw made of artificial tooth material, and a machined section for the upper or lower jaw made of denture base material that is substantially denture base shaped and fixes the artificial dentition section. Multiple retaining member connection ports are provided on the outer circumference of the upper jaw or lower jaw mill block body, the upper jaw or lower jaw denture base cutting portion. The aforementioned holder is An outer peripheral base portion is arranged around the upper jaw or lower jaw mill block body, The mill block body comprises a support member which is connected to a plurality of the retaining member connection ports in the mill block body and fixed to the upper or lower mill block body, and which is connected to the outer peripheral base portion to support the mill block body, A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 1, The holder is held in a disc holder that can hold a "standard disc," which is a disc-shaped mill block having a predetermined diameter and thickness and having protrusions or recesses formed on its outer circumference, while the mill block body is being held in place. The disc holder has a disc holding frame that conforms to the outer circumference shape of a standard disc, which is a disc-shaped mill block having a predetermined diameter and thickness and having protrusions or recesses formed on its outer circumference, and has a standard disc holding mechanism consisting of recesses or protrusions that fit or engage with the protrusions or recesses. The holder has a holder connection portion having a fixing and holding mechanism that contacts at least a part of the disc holding frame of the disc holder and is detachably fixed and held in the disc holder, and a body connection portion that contacts a plurality of the holding member connection ports of the mill block body and is connected and fixed to the upper jaw or lower jaw mill block body, and thereby fixes and holds the upper jaw or lower jaw mill block body in a predetermined position within the disc holding frame of the disc holder. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 2, The main body connection section includes the same number of support members as the number of the plurality of holding member connection ports, with one end of each support member connected to the holder connection section and the other end connected to each holding member connection port of the mill block main body. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 2 or 3, The holder connection portion consists of an annular frame type holder connection portion made of an annular frame, The fixing and holding mechanism of the annular frame type holder connection portion consists of a protrusion or recess formed on the outer circumference of the annular frame, which is identical to the entire protrusion or recess formed on the outer circumference of the standard disc corresponding to the standard disc holding mechanism. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 2 or 3, The holder connection portion consists of a combination of multiple arc-shaped holder connection portions having an arc-shaped outer surface, Each of the multiple arc-shaped holder connection parts is, This is one such annular frame having a protrusion or recess on its outer circumference that is identical or substantially identical to the entire protrusion or recess formed on the outer circumference of a standard disc corresponding to the standard disc holding mechanism, which is cut vertically along its outer circumference and divided into a number greater than or equal to the total number of the arc-shaped holder connection parts. The annular frame has a portion of the convex portion or the concave portion formed on its outer circumference, and has an arc-shaped outer surface. When the plurality of arc-shaped holder connection parts are arranged along the outer circumference of the annular frame, the arrangement of some of the protrusions or recesses on the outer surface of each arc-shaped holder connection part forms a fixing and holding mechanism for the holder connection part. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 2, The multiple retaining member connection ports on the outer circumference of the cut-to-machine portion of the denture base for the upper or lower jaw form convex protrusions that can be machined using the same material as the cut-to-machine portion of the denture base. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 2, The mill block body for the maxilla or mandible, which has the shape of a nearly complete denture base, has a portion to be cut for the denture base, which corresponds to the polished surface, the mucosal surface, the base margin which is the boundary between the polished surface and the mucosal surface, and the base wing, In the artificial dentition section of the upper or lower jaw mill block body, artificial teeth corresponding to teeth 1 through 7 on both sides, having a standard size and shape, are arranged in a standard arrangement pattern, and a portion of each artificial tooth in the artificial dentition section is embedded in the machined portion of the upper or lower jaw denture base so that a standard cervical area is formed and the crown is exposed, and at least the portion from the coronal papilla to the cervical area forms a gingival region with a standard shape. The area of ​​the machined portion of the upper or lower denture base, excluding the gingival region corresponding to the crown papilla to the gingival margin, is larger than the morphology of a standard complete denture. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 1, The aforementioned holder is a dedicated holder that is directly held by the cutting machine, replacing a disc holder that can hold a "standard disc," which is a disc-shaped mill block having a predetermined diameter and thickness and having protrusions or recesses formed on its outer circumference, while holding the mill block body. The dedicated holder has the same number of support members and dedicated holder body as the number of holding member connection ports, The dedicated holder body is equipped with a "set mechanism" for detachably attaching it to a cutting machine, and has a frame inside capable of housing the mill block body. Each of the aforementioned support members is connected and fixed to the dedicated holder body at one end. Each other end of the support member and each end region of the holding member connection port are formed with a fixing and holding mechanism that works in conjunction with each other to detachably fix and hold the mill block body inside the dedicated holder body. A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 8, The cutting machine is a holder capable of holding a standard disc, which is a disc-shaped mill block having a predetermined diameter and thickness and having protrusions or recesses formed on its outer circumference, and the holder has a disc holder frame that includes a standard disc holding mechanism and a setting mechanism for holding the standard disc, and the holder has a recess or protrusion that conforms to the outer circumference shape of the standard disc and fits or engages with the protrusion or recess, The dedicated holder body is provided with a support member mounting mechanism attached to the disc holder, which allows each of the support members to be detachably attached to the disc holder. A mill block kit for complete dentures, characterized by the following features. 　 A complete denture mill block kit according to claim 8 or 9, The aforementioned fixed holding mechanism (1) It consists of a protrusion and / or recess formed in the end region of the retaining member connection port, and a recess and / or protrusion formed in the other end of the support member that fits or engages with the protrusion and / or recess, (2) comprising a male or female screw structure formed in the end region of the retaining member connection port, and a screw structure that screws into the formed male or female screw structure, which is attached to the other end of the support member so as to be able to move back and forth and pivot. (3) A plunger mechanism attached to the other end of the support member, and a receiving structure formed in the end region of the retaining member connection port that fixes the position in which the pin of the plunger mechanism contacts, A mill block kit for complete dentures, characterized by the following features. 　 A mill block kit for complete dentures according to claim 8, The mill block body for the maxilla or mandible, which has the shape of a nearly complete denture base, has a portion to be cut for the denture base, which corresponds to the polished surface, the mucosal surface, the base margin which is the boundary between the polished surface and the mucosal surface, and the base wing, In the artificial dentition section of the maxillary or mandibular mill block body, artificial teeth corresponding to teeth 1 through 7 on both the left and right sides, having a standard size and shape, are arranged in a standard arrangement pattern, and a portion of each artificial tooth in the artificial dentition section is embedded in the machined portion of the maxillary or mandibular denture base such that a portion of each artificial tooth forms a standard cervical area with the crown exposed, and at least the portion from the coronal papilla to the cervical area forms a gingival region with a standard shape. The area of ​​the machined portion of the upper or lower denture base, excluding the gingival region corresponding to the crown papilla and gingival neck, is larger than the morphology of a standard complete denture. A mill block kit for complete dentures, characterized by the following features.

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