JPWO2017056180A1 - Medical material manufacturing block, dental prosthesis manufacturing block, and medical material manufacturing block manufacturing method - Google Patents

Abstract

An object of the present invention is to reduce the time required for manufacturing a medical material by reducing the number of steps when manufacturing a medical material such as a dental prosthesis. To provide a block for manufacturing a medical material, a block for manufacturing a dental prosthesis, and a method for manufacturing a block for manufacturing a medical material that can be easily collected. It has a chuck grip part fixed to a chuck of a cutting device and a part to be cut by a cutting tool, and the chuck grip part and the part to be cut are integrally formed of engineering plastic. A block for manufacturing a medical material, a block for manufacturing a dental prosthesis, and a method for manufacturing a block for manufacturing a medical material, which is manufactured by injection molding.

Description

  The present invention relates to a medical material manufacturing block, a dental prosthesis manufacturing block, and a manufacturing method of a medical material manufacturing block.

  As substitute materials for bones and teeth, metals such as SUS316, Co—Cr alloy, and Ti alloy are known. On the other hand, due to the diversification of MRI and CT in medicine, it has become impossible to overlook problems such as generation of magnetism, heat generation, and stress due to metal materials. As a result, engineering plastics, which are non-metallic and non-magnetic materials, have attracted attention as substitute materials for bones and teeth. Among these, polyether ether ketone (PEEK) has mechanical properties similar to those of bones and teeth. However, because of its excellent biocompatibility, technological development is particularly advanced.

  Conventionally, dental prostheses such as inlays, crowns, bridges, dentures, and implants have been prepared for individual patients by the manual work of dental technicians. In recent years, a technique has been used in which three-dimensional CAD data is acquired from a three-dimensional image obtained by MRI, CT, or the like, and a dental prosthesis suitable for each patient is manufactured by a numerically controlled machine tool.

  When a metal dental prosthesis is manufactured with a machine tool, for example, a cylindrical metal is fixed to the machine tool and cutting is performed. On the other hand, when manufacturing a dental prosthesis made of engineering plastic with a machine tool, for example, as shown in Patent Document 1, an engineering plastic work piece is bonded to a base of a metal chuck gripper. Cutting is performed using the composite for cutting.

Japanese Patent Laying-Open No. 2015-67543

By the way, as shown in FIG. 7, the cutting composite 705 exemplified in Patent Document 1 is a prismatic object having a size close to the final dental prosthesis 706 from the disk-shaped block 701 made of engineering plastic. The cut object 703 is cut out and manufactured by adhering it to a base 704 of a metal chuck grip 702. The dental prosthesis 706 is manufactured by fixing the chuck grip 702 of the cutting complex 705 to a chuck of a cutting device such as a numerically controlled machine tool and cutting the workpiece 703. When the workpiece 703 is bonded to the base 704 of the chuck grip 702, adjustment is performed so that the centers of the chuck grip 702 and the workpiece 703 coincide with each other so that the dimensional accuracy of the dental prosthesis 706 does not decrease. There is a need. In addition, after the dental prosthesis 706 has been cut out from the workpiece 703, the engineering plastic after the dental prosthesis 706 has been cut out is bonded to the base 704 of the chuck holding body 702. Whether the body 702 is reused or discarded, the engineering plastic must be removed from the pedestal 704 by chemicals or cutting.
As described above, since the cutting process was performed through a number of processes, the dental prosthesis made of engineering plastic took time and time required for production compared to the dental prosthesis made of metal.
Furthermore, since engineering plastics are expensive, it is necessary to collect cutting waste generated by cutting and reuse the engineering plastics, so that the engineering plastics stuck to the pedestal 704 must be completely removed and collected.

  The present invention can reduce the time required for manufacturing a medical material by reducing the number of steps when manufacturing a medical material such as a dental prosthesis, and can recover the engineering plastic after the medical material is cut out. It is an object of the present invention to provide a method for manufacturing a medical material manufacturing block, a dental prosthesis manufacturing block, and a medical material manufacturing block.

Means for solving the problems are as follows:
(1) It has a chuck holding part fixed to the chuck of the cutting device and a part to be cut by a cutting tool, and the chuck holding part and the part to be cut are integrally formed of engineering plastic. It is a block for medical material manufacture characterized by these.

The preferred embodiment of (1) is as follows.
(2) The part to be cut has at least one pair of a pair of planes parallel to each other and parallel to the axis of the chuck gripping part extending in the direction of insertion into the chuck.
(3) In the medical material manufacturing block according to (1) or (2), the engineering plastic is polyetheretherketone.

Means for solving the another problem is as follows.
(4) It has a chuck grip part fixed to the chuck of the cutting device and a part to be cut by a cutting tool, and the chuck grip part and the part to be cut are integrally formed of engineering plastic. It is a block for dental prosthesis manufacturing characterized by these.

Means for solving the another problem is as follows.
(5) The method for manufacturing a block for manufacturing a medical material according to any one of (1) to (3), wherein the block is manufactured by injection molding. It is.

In the medical material manufacturing block and dental prosthesis manufacturing block according to the present invention, the chuck gripping part and the part to be cut are not formed of different materials, but are integrally formed of engineering plastic, There is no work for bonding an engineering plastic work piece to a metal chuck gripper as in the prior art. Therefore, since there is no center alignment when bonding the chuck gripping body and the workpiece, there is no variation in the dimensions of each medical material manufacturing block and each dental prosthesis manufacturing block. Moreover, there is no operation | work which removes the to-be-cut object which remains on the base of a chuck | zipper holding body after cutting out a dental prosthesis from a to-be-cut object like the past. Therefore, according to the present invention, it is possible to reduce the number of steps when manufacturing a medical material, particularly a dental prosthesis, by cutting, and as a result, it is possible to reduce the time required for manufacturing the medical material, particularly a dental prosthesis.
The medical material manufacturing block and the dental prosthesis manufacturing block according to the present invention collect the cutting waste and the chuck grip after cutting and collect the engineering plastic after cutting out the medical material, particularly the dental prosthesis. This makes it easy to collect engineering plastics.
Further, according to the method for manufacturing a medical material manufacturing block according to the present invention, the medical material manufacturing block is manufactured by injection molding. Therefore, a medical material manufacturing block having a complicated shape having a chuck holding part and a part to be cut is provided. Can be manufactured integrally with engineering plastics.

FIG. 1 is a six-side view of a dental prosthesis manufacturing block which is an example of a medical material manufacturing block according to the present invention. FIG. 1A is a front view of a dental prosthesis manufacturing block. FIG. 1B is a left side view of the dental prosthesis manufacturing block. FIG. 1C is a right side view of the dental prosthesis manufacturing block. FIG.1 (d) is a rear view of the block for dental prosthesis manufacture. FIG. 1 (e) is a plan view of a dental prosthesis manufacturing block. FIG. 1 (f) is a bottom view of the dental prosthesis manufacturing block. FIG. 2 is an explanatory diagram illustrating an example of a cutting device. FIG. 3 is a six-side view of a medical material manufacturing block as an example of the medical material manufacturing block according to the present invention. FIG. 3A is a front view of a medical material manufacturing block. FIG. 3B is a left side view of the medical material manufacturing block. FIG. 3C is a right side view of the medical material manufacturing block. FIG. 3D is a rear view of the medical material manufacturing block. FIG. 3E is a plan view of the medical material manufacturing block. FIG. 3F is a bottom view of the medical material manufacturing block. FIG. 4 is a six-side view of a medical material manufacturing block as an example of the medical material manufacturing block according to the present invention. FIG. 4A is a front view of a medical material manufacturing block. FIG. 4B is a left side view of the medical material manufacturing block. FIG. 4C is a right side view of the medical material manufacturing block. FIG. 4D is a rear view of the medical material manufacturing block. FIG. 4E is a plan view of the medical material manufacturing block. FIG. 4F is a bottom view of the medical material manufacturing block. FIG. 5 is a 6-side view of a medical material manufacturing block as an example of the medical material manufacturing block according to the present invention. Fig.5 (a) is a front view of the block for medical material manufacture. FIG. 5B is a left side view of the medical material manufacturing block. FIG. 5C is a right side view of the medical material manufacturing block. FIG. 5D is a rear view of the medical material manufacturing block. FIG. 5E is a plan view of the medical material manufacturing block. FIG. 5F is a bottom view of the medical material manufacturing block. FIG. 6 is a six-side view of a medical material manufacturing block which is an example of the medical material manufacturing block according to the present invention. FIG. 6A is a front view of the medical material manufacturing block. FIG. 6B is a left side view of the medical material manufacturing block. FIG. 6C is a right side view of the medical material manufacturing block. FIG. 6D is a rear view of the medical material manufacturing block. FIG. 6E is a plan view of the medical material manufacturing block. FIG. 6F is a bottom view of the medical material manufacturing block. FIG. 7 is an explanatory diagram for explaining a manufacturing process of a conventional dental prosthesis.

  The medical material manufacturing block of the present invention is used to manufacture a medical material having a desired shape by being fixed to a cutting device and being cut. Examples of the medical material include alternative materials such as bones, teeth, and valves, and parts for fixing them, and are used by being embedded in the body. Medical materials include not only materials for treatment but also materials for cosmetic surgery and the like. Examples of bone substitute materials include artificial bones such as nasal bones and phalanges, artificial joints, and artificial spines. Examples of tooth substitute materials include dental prostheses such as inlays, crowns, bridges, dentures, and dental implants. Dental implants include implants that are implanted in the jaw bone, superstructures that replace the crown and are also referred to as artificial teeth, and abutments that connect them. As an alternative material of a valve, the leaflet etc. which are used for a mitral valve, an aortic valve, etc. can be mentioned, for example.

(First embodiment)
Hereinafter, an example of a dental prosthesis manufacturing block used for manufacturing a dental prosthesis will be described as an embodiment of the medical material manufacturing block according to the present invention with reference to the drawings. FIG. 1 is a six-side view of a dental prosthesis manufacturing block which is an example of a dental prosthesis manufacturing block according to the present invention. FIG. 2 is an explanatory diagram illustrating an example of a cutting device.

  As shown in FIG. 1, a dental prosthesis manufacturing block 1 includes a chuck gripping portion 2 fixed to a chuck 11 of a cutting device 10 and a portion to be cut 3 cut by a cutting tool 12. 2 and the part 3 to be cut are integrally formed of engineering plastic.

  The chuck gripping part 2 and the part to be cut 3 are not formed by joining the chuck gripping part 2 and the part to be cut 3 separately and then formed integrally by injection molding or the like. It does not have a joining part which joins part 2 and to-be-cut part 3. The chuck gripping part 2 and the part to be cut 3 are an integral body made of engineering plastic. The chuck gripping portion 2 and the portion to be cut 3 are preferably formed of the same material, but may be partially formed of different materials as long as they are integrally formed. For example, a mode in which a fiber reinforced material is contained in the chuck gripping portion 2 and a fiber reinforced material is not contained in the cut portion 3 may be employed.

  The engineering plastic has a strength at least capable of being cut by being attached to a cutting device. Moreover, it is preferable that an engineering plastic has a mechanical characteristic similar to the living bone or tooth | gear of the site | part to which it is applied. The engineering plastic has, for example, a bending elastic modulus of 3 to 30 GPa and a bending strength of 50 to 300 MPa, although it varies depending on the portion to be applied. Engineering plastics include, for example, polyetheretherketone, polyetheretherketoneketone, polyetherketoneketone, polyetherketoneketoneketone, etc. aromatic polyetherketone, polyamide, polyamideimide, polyetherimide, polyphenylene sulfide, and Mention may be made of thermoplastic engineering plastics such as liquid crystal polymers and thermosetting engineering plastics such as melamine, silicone and phenol. The block 1 for manufacturing a dental prosthesis may be formed of one type of engineering plastic, or may be formed using two or more types in combination. Among these, polyether ether ketone (PEEK) excellent in biocompatibility is preferable as a material for the block 1 for producing a dental prosthesis.

  The engineering plastic may be a fiber reinforced engineering plastic mixed with fibers. Examples of fibers contained in the fiber-reinforced engineering plastic include carbon fibers such as carbon nanotubes, glass fibers, ceramic fibers such as silicon carbide and alumina, metal fibers such as tungsten and molybdenum, and organic fibers such as polyester and polyamide. Etc. These fibers may be contained singly or in a mixture of two or more. The engineering plastic may be a particle-containing engineering plastic including particles made of the same material as the fiber material described above.

  The engineering plastic may contain conventionally known various additives such as a color pigment, an antioxidant, an antibacterial agent, a stabilizer, and a discoloration inhibitor, as necessary.

  The chuck grip 2 is a part that is fixed to the chuck 11 of the cutting apparatus 10. The shape and size of the chuck grip 2 are not particularly limited as long as it can be fixed to the chuck 11. The chuck grip 2 preferably has a rotationally symmetric shape about the axis O as viewed from the direction of the axis O extending in the direction of insertion into the chuck 11. Further, the chuck grip 2 has a strength capable of being fixed to the chuck 11 and being cut. For example, the chuck grip 2 preferably has a thickness of 3 mm or more, although it varies depending on the material of the dental prosthesis manufacturing block 1. A chuck grip 2 shown in FIG. 1 has a substantially cylindrical rod-shaped portion 4 and a disk portion 5 having a larger diameter than the rod-shaped portion 4. As shown in FIGS. 1A to 1D, the rod-like portion 4 has a constricted portion 6 having a smaller diameter than other portions at the center in the axis O direction. As shown in FIG. 1 (f), the disk portion 5 has a notch portion 7 that is cut from the outer peripheral surface of the disk portion 5 to the vicinity of the outer peripheral surface of the rod-like portion 4 when viewed from the bottom surface. The notch 7 is positioned by fitting with a protrusion provided on the chuck 11 of the cutting device 10 and used to fix the dental prosthesis manufacturing block 1 so as not to rotate about the axis O. It is done. Since the dental prosthesis manufacturing block 1 can be fixed to the chuck 11 in a non-rotatable manner by other means, there is no disk portion 5 having the notch portion 7 when the cutting device 10 does not have a protrusion. May be.

  The part to be cut 3 is a part that is cut by the cutting tool 12 and the dental prosthesis is cut out. The size and shape of the to-be-cut part 3 are not particularly limited as long as it is a size and shape that can cut out the dental prosthesis that is the final product. A cut portion 3 shown in FIG. 1 is a regular quadrangular prism, and has a width larger than the diameter of the disk portion 5 of the chuck gripping portion 2. In the case of dental use, the dimensions of the part 3 to be cut are, for example, 8 to 16 mm in length, 8 to 16 mm in width, and 12 to 20 mm in height. Since the part 3 to be cut is a regular quadrangular prism, two planes 8a and 8b of the four side surfaces are arranged parallel to the axis O and parallel to each other, and the other two planes 9a and 9b are also parallel to the axis O. And arranged parallel to each other. Since this part to be cut 3 has two pairs of parallel planes 8a, 8b, 9a, 9b, an automatic workpiece changer equipped with a jig having a pair of clamping parts that open and close is used. The side surface of the part to be cut 3 can be securely clamped. Therefore, the dental prosthesis manufacturing block 1 having the part 3 to be cut can efficiently manufacture a dental prosthesis using a machining center equipped with an automatic workpiece changer.

  The cutting device 10 is not particularly limited as long as it can fix the chuck grip 2 in the dental prosthesis manufacturing block 1 and cut the cut portion 3 to cut out the dental prosthesis. Examples of the cutting device include a normal lathe, a numerically controlled machine tool, and a machining center. The numerically controlled machine tool is a machine that instructs and automatically processes relative motion between the cutting tool 12 and the dental prosthesis manufacturing block 1 by means of numerical information. The machining center is an apparatus provided with an automatic tool changer capable of performing a plurality of operations such as milling and drilling by a single attachment in addition to a numerically controlled machine tool, and preferably an automatic work changer that further automatically attaches a workpiece. Is provided.

  A cutting apparatus 10 shown in FIG. 2 is a machining center having a main body portion 13 having a chuck 11 for fixing the dental prosthesis manufacturing block 1, a cutting portion 14 having a cutting tool 12, and a computer 15. The computer 15 includes an NC data creation unit that creates NC data by setting cutting conditions from the input three-dimensional CAD data, and a control unit that controls operations of the main body unit 13 and the cutting unit 14 based on the NC data. Have. The three-dimensional CAD data may be input to the computer 15 by communication means such as the Internet, or may be stored in a portable memory, transferred, and taken into the computer 15. In addition, the NC data creation unit and the control unit may be installed in separate locations as separate computers, and the NC data created by the NC data creation unit may be transmitted to a computer having the control unit by communication means or the like. Good. The structure of the chuck 11 is not particularly limited as long as the chuck gripping portion 2 can be attached along the main axis of the chuck 11, and examples include a third-step interlocking chuck, a fourth-step single-action chuck, and the like. As the cutting tool 12, a known cutting tool used in a lathe can be used, and examples thereof include a cutting tool and an end mill. The cutting apparatus 10 can automatically cut the dental prosthesis manufacturing block 1 fixed to the chuck 11 to cut out a dental prosthesis having a shape adapted to each patient. Although not shown in FIG. 2, the cutting device 10 includes an automatic tool changer and an automatic work changer that automatically change the dental prosthesis manufacturing block 1 and the cutting tool 12, respectively, so that the production efficiency can be improved. it can.

Since this dental prosthesis manufacturing block 1 is integrally formed of engineering plastic, there is no work for bonding an engineering plastic workpiece to a metal chuck gripper as in the prior art. Therefore, since there is no center alignment when bonding the chuck gripping body and the workpiece, there is no variation in the dimensions of the dental prosthesis manufacturing blocks. Therefore, it is not necessary to adjust the cutting device 10 caused by the dimensional variation. Moreover, since there is no dispersion | variation in the dimension for every block for dental prosthesis manufacture, a dental prosthesis with high dimensional accuracy can be manufactured. Moreover, there is no operation | work which removes the to-be-cut object which remains on the base of a chuck | zipper holding body after cutting out a dental prosthesis from a to-be-cut object like the past. Therefore, according to this dental prosthesis manufacturing block 1, the number of steps when manufacturing a dental prosthesis by cutting can be reduced, and as a result, the time required for manufacturing the dental prosthesis can be reduced. Moreover, a dental prosthesis with high dimensional accuracy can be manufactured.
In addition, the remaining parts including the chuck gripping body, which are generated after cutting the dental prosthesis or the like from the dental prosthesis manufacturing block, can be recovered as they are, and the engineering plastic can be reused.

Next, an example of the manufacturing method of the dental prosthesis manufacturing block 1 will be described.
The manufacturing method of the dental prosthesis manufacturing block 1 is not particularly limited as long as the chuck gripping portion 2 and the cut portion 3 are integrally formed of engineering plastic. The dental prosthesis manufacturing block 1 can be manufactured, for example, by injection molding or the like.

  In the method of manufacturing the dental prosthesis manufacturing block 1 by injection molding, first, a mold including a cavity having an inner peripheral surface having the same shape as the outer peripheral surface of the dental prosthesis manufacturing block 1 is prepared. The engineering plastic melted by heating to a temperature higher than the melting point is injected into the cavity of the mold by applying a predetermined injection pressure. For example, in the case of PEEK, it is heated to about 380 ° C. and injected into the mold cavity. Next, the mold is cooled to solidify the engineering plastic and demold. The molded product after demolding has not only the target dental prosthesis manufacturing block 1 but also engineering plastic filled in a sprue, which is an inlet path for injecting molten engineering plastic. Therefore, the dental prosthesis manufacturing block 1 is obtained by cutting off the engineering plastic filled in the sprue from the molded product.

  Next, an example of a method for manufacturing a dental prosthesis by mounting the dental prosthesis manufacturing block 1 on the cutting apparatus 10 will be described.

  First, a model of a dental prosthesis such as a crown is prepared, and this is scanned to obtain three-dimensional CAD data. Three-dimensional CAD data is input to the computer 15 of the cutting apparatus 10, and the computer 15 sets cutting conditions such as the type of cutting tool, feed speed, rotation speed, and position from the three-dimensional CAD data, and a machining program for the cutting apparatus 10 NC data is created.

  On the other hand, the side surface of the cut portion 3 of the dental prosthesis manufacturing block 1 is clamped by a robot or the like having a clamping portion, the chuck gripping portion 2 is inserted into the chuck 11 of the cutting device 10, and the spindle of the chuck 11 and the dental prosthesis It fixes so that the axis line O of the block 1 for product manufacture may correspond. This operation is preferably performed automatically by a robot or the like in terms of production efficiency.

  Next, the dental prosthesis having a desired shape is obtained by operating the main body portion 13 and the cutting portion 14 based on the NC data in the computer 15. The obtained dental prosthesis is subjected to polishing or the like as necessary. The dental prosthesis manufacturing block after the dental prosthesis has been cut out may be discarded as it is, but can also be reused.

  According to this method of manufacturing a dental prosthesis, the dental prosthesis manufacturing block 1 is manufactured by injection molding. Therefore, the complex-shaped dental prosthesis manufacturing block 1 having the chuck gripping portion 2 and the cut portion 3 is engineered. Can be manufactured integrally with plastic. In addition, since the dental prosthesis is manufactured using the dental prosthesis manufacturing block 1 integrally formed of engineering plastic, the time required for manufacturing the dental prosthesis can be shortened, and the dental with high dimensional accuracy can be obtained. A prosthesis can be manufactured.

  The dental prosthesis manufacturing block as an example of the medical material manufacturing block according to the present invention, and the dental prosthesis manufacturing block manufacturing method as an example of the manufacturing method of the medical material manufacturing block according to the present invention are as described above. The present invention is not limited to the form, and various modifications can be made within a range in which the object of the present invention can be achieved.

(Second Embodiment)
The medical material manufacturing block 101 of the second embodiment has the same configuration as the medical material manufacturing block 1 of the first embodiment, except that the part to be cut 103 is substantially cylindrical. As shown in FIG. 3 (e) and (f), the medical material production block 101 has a parallel to the axis _{O 1} and a pair of parallel planes 108a together, the 108b, other aspects of the circular cross-section It is a curved surface.

(Third embodiment)
The medical material manufacturing block 201 of the third embodiment has the same configuration as the medical material manufacturing block 1 of the first embodiment, except that the part 203 to be cut is hexagonal when viewed from the direction of the axis O _2. . As shown in FIG. 4 (e) and (f), the medical material for producing block 201, three sets parallel and a pair of parallel planes 208a each other in the axial line _{O 2, 208b, 209a, 209b} , 210a, 210b and Have.

(Fourth embodiment)
The medical material manufacturing block 301 of the fourth embodiment has the same configuration as the medical material manufacturing block 1 of the first embodiment, except that the part 303 to be cut is an octagon when viewed from the direction of the axis O _3. . As shown in FIG. 5 (e) and (f), the medical material production block 301 is parallel to the axis _{O 3} and mutually parallel pair of flat 308a, 308b, 309a, 309b, 310a, 310b, 311a, There are 4 sets of 311b.

(Fifth embodiment)
Medical materials for producing block 401 of the fifth embodiment, except that the cutting portion 403 is dodecagon as viewed from the axial O ₄ direction, the same configuration as medical materials for producing block 1 of the first embodiment Have. As shown in FIG. 6 (e) and (f), the medical material production block 401 is parallel to the axis _{O 4} and a pair of parallel planes 408a together, 408b, 409a, 409b, 410a , 410b, 411a, There are five sets of 411b, 412a, 412b, 413a, and 413b.

DESCRIPTION OF SYMBOLS 1 Medical material manufacturing block, Dental prosthesis manufacturing block 101, 201, 301, 401 Medical material manufacturing block 2, 102, 202, 302, 402 Chuck grip part 3, 103, 203, 303, 403 Cutting part 4 Bar-shaped part 5 Disk part 6 Constricted part 7 Notch part 8a, 8b, 9a, 9b, 108a, 108b, 208a, 208b, 209a, 209b, 210a, 210b, 308a, 308b, 309a, 309b, 310a, 310b, 311a, 311b, 408a, 408b, 409a, 409b, 410a, 410b, 411a, 411b, 412a, 412b, 413a, 413b Plane 109 Curved surface 10 Cutting device 11 Chuck 12 Cutting tool 13 Body portion 14 Cutting portion 15 Computer

Means for solving the problems are as follows:
(1) It has a chuck grip part fixed to a chuck with positioning projections of a cutting device and a part to be cut by a cutting tool, and the chuck grip part and the part to be cut are made of polyetheretherketone. Ri Na integrally formed by injection molding, wherein the cutting portion includes at least one Kumiyu a parallel and a pair of parallel planes to each other to the axis of the chuck gripping portion extending in a direction to be inserted into the chuck The chuck gripping portion includes a rod-shaped portion extending in a direction of insertion into the chuck, a disk having a larger diameter than the rod-shaped portion provided at an end of the rod-shaped portion, and a smaller diameter than the portion to be cut. And the disc portion is cut out radially inward from the outer peripheral surface of the disc portion as viewed from the bottom surface side of the disc portion on the rod-like portion side, and opened on the bottom surface side. Cut out It has a section, the cutout portion may be fitted to the positioning protrusion from the bottom surface to accept the projecting portions for positioning a medical material for producing blocks.

Means for solving the another problem is as follows.
( 2 ) It has a chuck holding part fixed to the chuck with positioning projections of the cutting apparatus and a part to be cut by a cutting tool, and the chuck holding part and the part to be cut are made of polyetheretherketone. Ri Na integrally formed by injection molding, wherein the cutting portion includes at least one Kumiyu a parallel and a pair of parallel planes to each other to the axis of the chuck gripping portion extending in a direction to be inserted into the chuck The chuck gripping portion includes a rod-shaped portion extending in a direction of insertion into the chuck, a disk having a larger diameter than the rod-shaped portion provided at an end of the rod-shaped portion, and a smaller diameter than the portion to be cut. And the disc portion is cut out radially inward from the outer peripheral surface of the disc portion as viewed from the bottom surface side of the disc portion on the rod-like portion side, and opened on the bottom surface side. To cut Has out portions, the notch is characterized by being fitted to the positioning protrusion from the bottom surface to accept the projecting portions for positioning a dental prosthesis manufacturing block.

Claims (5)

  It has a chuck grip part fixed to a chuck of a cutting device and a part to be cut by a cutting tool, and the chuck grip part and the part to be cut are integrally formed of engineering plastic. Block for manufacturing medical materials.   2. The medical material according to claim 1, wherein the part to be cut has at least one pair of planes parallel to each other and parallel to an axis of the chuck gripping part extending in a direction of insertion into the chuck. Manufacturing block.   The medical material manufacturing block according to claim 1, wherein the engineering plastic is polyetheretherketone.   It has a chuck grip part fixed to a chuck of a cutting device and a part to be cut by a cutting tool, and the chuck grip part and the part to be cut are integrally formed of engineering plastic. Blocks for manufacturing dental prostheses.   It is a manufacturing method of the block for medical material manufacture as described in any one of Claims 1-3, Comprising: It manufactures by injection molding, The manufacturing method of the block for medical material manufacture characterized by the above-mentioned.

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