WO2022230863A1 - 切削加工装置、保持装置、及び加工方法 - Google Patents
切削加工装置、保持装置、及び加工方法 Download PDFInfo
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- WO2022230863A1 WO2022230863A1 PCT/JP2022/018854 JP2022018854W WO2022230863A1 WO 2022230863 A1 WO2022230863 A1 WO 2022230863A1 JP 2022018854 W JP2022018854 W JP 2022018854W WO 2022230863 A1 WO2022230863 A1 WO 2022230863A1
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- machining
- cutting
- holding
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- 238000003754 machining Methods 0.000 title claims abstract description 128
- 238000005520 cutting process Methods 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims description 26
- 238000012545 processing Methods 0.000 claims description 77
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 19
- 238000003672 processing method Methods 0.000 claims description 6
- 238000010586 diagram Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 17
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 14
- 238000013461 design Methods 0.000 description 12
- 238000003860 storage Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000005548 dental material Substances 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000007730 finishing process Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 6
- 238000004040 coloring Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 210000004283 incisor Anatomy 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000007943 implant Substances 0.000 description 3
- 230000015654 memory Effects 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000005245 sintering Methods 0.000 description 3
- 241000282465 Canis Species 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012237 artificial material Substances 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0022—Blanks or green, unfinished dental restoration parts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0004—Computer-assisted sizing or machining of dental prostheses
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C13/00—Dental prostheses; Making same
- A61C13/0003—Making bridge-work, inlays, implants or the like
- A61C13/0006—Production methods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C5/00—Filling or capping teeth
- A61C5/70—Tooth crowns; Making thereof
- A61C5/77—Methods or devices for making crowns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/25—Movable or adjustable work or tool supports
- B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
- B23Q1/50—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
- B23Q1/52—Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair
Definitions
- the present invention relates to a dental prosthesis cutting device, holding device, and processing method.
- Non-Patent Document 1 by rotating the workpiece around a predetermined rotation axis, cutting can be performed from two directions facing two surfaces parallel to the rotation axis. It becomes possible. However, cutting from the direction facing the plane perpendicular to the axis of rotation is not possible, and even in this case, the shape and orientation of the prosthesis that can be produced from the workpiece are limited.
- the present invention has been made in view of the above circumstances. It makes it possible to cut a dental prosthesis.
- a cutting apparatus changes the relative positional relationship between a machining tool and a block-shaped workpiece in three dimensions, and cuts the workpiece with the machining tool. It is a cutting device for a dental prosthesis to be processed.
- a pedestal attached to the cutting apparatus is fixed on one surface (A1 surface) of the workpiece.
- the cutting device places the workpiece on the machining tool so that the workpiece is cut from a direction perpendicular to the opposite surface (A2 surface) facing the one surface (A1 surface). a positioning part for positioning against.
- the degree of freedom in cutting is improved, and the dental prosthesis can be cut efficiently in a short time with high accuracy. It becomes possible.
- FIG. 1 is a diagram showing a schematic configuration of a holding device according to a first embodiment and a dental prosthesis cutting apparatus provided with this holding device; 2 is a block diagram showing a schematic configuration of the cutting apparatus shown in FIG. 1;
- FIG. FIG. 4 is a perspective view of the holding device for explaining the configuration and operation of the holding device according to the first embodiment;
- FIG. FIG. 4 is a diagram for explaining the configuration and operation of the holding device according to the first embodiment, and is a perspective view showing a state in which a holding section holding a plurality of workpieces is arranged at a reference position;
- FIG. 4B is a diagram for explaining the configuration and operation of the holding device according to the first embodiment, and is a side view showing a state in which the holding portion is rotated at a rotation angle of 90° from the reference position. It is a figure for demonstrating a to-be-processed object and a dental prosthesis.
- (a) is a perspective view of a workpiece.
- (b) is a diagram showing an example of a prosthesis obtained by cutting a workpiece.
- (c) is a diagram showing another example of a prosthesis obtained by cutting a workpiece.
- (d) is a diagram showing a workpiece of a modified example.
- (e) is a diagram showing a workpiece of a further modified example.
- FIG. 2 is a flow chart showing an example of the flow of processing (processing method) executed by the cutting apparatus of the first embodiment, and an image diagram of processing in each processing step.
- FIG. 4 is a flowchart showing another example of the flow of processing (processing method) executed by the cutting apparatus of the first embodiment, and an image diagram of processing in each processing step.
- FIG. 1 is a diagram showing a schematic configuration of a cutting device 100 having a holding device 20 according to the first embodiment
- FIG. 2 is a block diagram showing a schematic configuration of the cutting device 100. As shown in FIG.
- the cutting apparatus 100 of the present embodiment three-dimensionally changes the relative positional relationship between the machining tool 12 and the block-shaped workpiece W, and cuts the workpiece W with the machining tool 12 to form a tooth.
- This is a cutting device for producing dental prostheses P such as crowns, bridges and implants.
- the cutting device 100 includes a cutting device 10, a holding device 20, and a control device 30.
- the cutting apparatus 100 also includes a dust collection pipe, a dust collection device, and the like for collecting and removing dust in the processing space 3 a of the processing chamber 3 .
- the cutting apparatus 100 may also include a coloring apparatus for coloring the processed prosthesis, a sintering apparatus for sintering the prosthesis, and the like.
- the cutting apparatus 100 of the present embodiment includes the holding device 20 and other configurations, and can include the configuration of a known appropriate CAD/CAM processing apparatus.
- the X-axis, Y-axis and Z-axis of XYZ orthogonal coordinates are set, the left direction in FIG.
- the positive direction of the Y-axis is defined as the negative Y-axis direction
- the upward direction is defined as the positive Z-axis direction
- the downward direction is defined as the negative Z-axis direction.
- the positive direction of the X-axis is the longitudinal direction of the holding portion 21 of the holding device 20 and coincides with the direction in which the plurality of workpieces W are arranged.
- the rotation axis of the machining tool 12 of the cutting device 10 coincides with the Z-axis direction.
- a cutting device 100 has a housing 2 covered with a cover member 1 .
- a processing chamber 3 for cutting the workpiece W is provided in the housing 2, and a door 4 for taking in and out the workpiece W and the prosthesis P after machining is provided so as to be openable and closable.
- the cutting device 10 is provided in the processing space 3a of the processing chamber 3, and cuts the workpiece W, which is the raw material (dental material) of the dental prosthesis P.
- the cutting device 10 has a spindle 11 , a machining tool 12 , a Z-axis rotation drive section 13 and an XZ direction movement section 14 .
- the processing tool 12 is detachably attached to the spindle 11 .
- the Z-axis rotation drive unit 13 rotates the spindle 11 .
- the XZ-direction moving part 14 moves the spindle 11 together with the machining tool 12 in the X-axis direction and the Z-axis direction.
- the cutting device 10 may have a function of moving the spindle 11 together with the machining tool 12 further in the Y direction.
- the Z-axis rotation drive unit 13 is composed of an electric motor, a spindle motor, etc., and rotates the spindle 11 around the Z-axis as a rotation axis.
- rotating about the Z axis or the like as a rotation axis is referred to as "rotation about the Z axis" or the like.
- the XZ-direction moving part 14 is composed of a ball screw mechanism, a rack and pinion mechanism, a crank-slider mechanism, a fluid cylinder that is linearly moved by air pressure, water pressure, or hydraulic pressure, etc., and moves the spindle 11 in the X-axis direction and the Z-axis direction. move.
- the machining tool 12 is, for example, a ball end mill, a radius end mill, a flat end mill, a taper end mill, a roughing end mill, etc. for performing rough machining such as trochoid machining of the workpiece W, and a drill for performing internal machining such as hole machining.
- a machining tool having a cutting edge not only at the cutting edge but also at the neck is preferably used.
- the holding device 20 is provided in the processing space 3a of the processing chamber 3, and detachably holds the workpiece W and the prosthesis P after processing.
- the holding device 20 includes a holding portion 21 that holds one or more workpieces W via a pedestal, a rotating portion 22 that rotates the holding portion 21 about the X axis, a holding portion 21 and and a Y-direction moving unit 23 that moves the rotating unit 22 in the Y-axis direction.
- the holding part 21 has a holding body 24 that holds the workpiece W and a support shaft 25 that is attached to the rotating part 22, as shown in FIG. 3A.
- the holding body 24 has an elongated rectangular parallelepiped shape, and a supporting shaft 25 is provided along the longitudinal direction on one side surface (right side surface 24b2) of the holding body 24 in the longitudinal direction.
- the support shaft 25 and the holding body 24 are arranged so as to extend along the X-axis direction.
- the holding body 24 is arranged along the X-axis direction, and the two surfaces having the widest areas of the holding body 24 are arranged vertically.
- the position of the holding body 24 is defined as the “reference position” of the holding portion 21 .
- the two surfaces of the holding body 24 that are arranged to face each other in the vertical direction are defined as an upper surface (a surface in the Z-axis positive direction) 24a1 and a lower surface (a surface in the Z-axis direction) 24a1.
- the surface in the negative direction) is referred to as 24a2.
- the two surfaces facing each other in the longitudinal direction (X-axis direction) are referred to as a left side surface (surface in the positive direction of the X-axis) 24b1 and a right side surface (surface in the negative direction of the X-axis) 24b2.
- the two surfaces facing each other in the lateral direction are referred to as a front surface (surface in the positive direction of the Y-axis) 24c1 and a rear surface (surface in the negative direction of the Y-axis) 24c2.
- the holding body 24 has a front surface 24c1 and a rear surface 24c2 on both sides of the width direction (width direction, Y-axis direction) along the longitudinal direction (X-axis direction).
- Mounting holes 24d are provided at predetermined intervals.
- a plurality of screw holes 24e are provided at predetermined intervals on the upper surface 24a1 of the holding body 24 along both side edges at positions corresponding to the plurality of mounting holes 24d.
- the corresponding mounting holes 24d and screw holes 24e communicate with each other.
- 3B is a diagram illustrating a state in which the screw 24f is screwed only into the screw hole 24e where the workpiece W is attached.
- the operator temporarily screws 24f into all the screw holes 24e, and when inserting the pin 6b of the workpiece W, the screw 24f corresponding to the workpiece W is You may screw until the pin 6b can be fixed.
- FIG. (a) of FIG. 4 is a perspective view of the workpiece W
- (b) and (c) of FIG. 4 are the prosthesis P1 produced by cutting the workpiece W. , P2.
- the workpiece W for example, a substantially cubic block is used when manufacturing a single dental crown, and a substantially rectangular parallelepiped block is used when manufacturing a plurality of continuous dental crowns.
- any known block shape may be used.
- a metal pedestal 6 for attaching the workpiece W to the holding portion 21 is adhesively fixed to one surface of the workpiece W.
- the pedestal 6 has a pedestal adhesive surface 6a and a pin 6b projecting from the pedestal adhesive surface 6a.
- the prostheses P1 and P2 produced by cutting the workpiece W are adhered and fixed to the pedestal adhesive surface 6a by the support 7, which is a part of the block body left by the cutting process.
- the support 7 together with the pedestal 6 is cut from the prosthesis P1, P2.
- A1 surface one surface of the workpiece W to which the pedestal 6 is adhered and fixed
- A2 surface the opposing surface facing the A1 surface
- face one of the other four surfaces perpendicular to the A surface
- B1 surface one of the other four surfaces perpendicular to the A surface
- B2 surface the opposing surface opposite to the B1 surface
- C1 surface one of the remaining two surfaces orthogonal to the A and B surfaces
- C2 surface the opposing surface opposed to the C1 surface
- the pins 6b of the workpiece W are inserted into the mounting holes 24d of the holding body 24, and the screws 24f inserted into the screw holes 24e are screwed into the holding body 24.
- a workpiece W is fixed.
- the pin 6b extends along the width direction of the holding body 24 and is arranged so that the A2 surface faces perpendicularly to the width direction.
- the workpiece W is attached to the holding body 24 in alignment such that the B1 plane and the B2 plane are arranged parallel to the upper surface 24a1 and the lower surface 24a2 of the holding body 24 .
- Materials (materials) for the workpiece W and the prosthesis P may be those used as dental materials such as crowns, bridges, and implants, and examples thereof include ceramic materials, resin materials such as resin, and the like. , but not limited to.
- a ceramic-based material is preferably used because of its excellent biocompatibility and strength.
- zirconia is most preferred because it has higher biocompatibility and strength and is more aesthetically pleasing.
- used for Zirconia may be any of a molded body, a calcined body, a sintered body, and the like.
- the rotating part 22 has a cylindrical rotating member 26 attached to the main body so as to be rotatable around the X axis, and an X-axis rotation driving part 27 that rotates the rotating member 26 around the X axis.
- the rotary member 26 is attached to the main body so as to be rotatable clockwise as indicated by an arrow in FIG.
- the X-axis rotation driving section 27 is composed of an electric motor, a spindle motor, or the like, and rotates the rotating member 26 around the X-axis under the control of the control section 31 .
- the rotating part 22 rotates the holding part 21 at rotation angles of 90° and 270° with respect to the above-described "reference position", fixes the holding part 21 at this rotational position, and positions the workpiece W. It functions as a positioning part. It should be noted that it is not necessary to strictly set the rotation angles to 90° and 270°. More specifically, the rotating part 22 rotates the holding part 21 at a rotation angle of 80° to 100° and a rotation angle of 260° to 280° with respect to the reference position. can be positioned. Further, in order to position the workpiece W more accurately, the holding device 20 may be provided with stoppers at positions of 90° and 270°, or may measure the rotation angle with an angle sensor or the like. .
- the B1 surface of the workpiece W attached to the back surface 24c2 side is arranged to face the processing tool 12, as shown in FIG. 3B. Therefore, the machining tool 12 can cut the workpiece W from a direction perpendicular to the B1 plane.
- the rotating part 22 rotates the holding part 21 at a rotation angle of 90° (80° to 100°) and positions it at this position, so that the cover on the back surface 24c2 side as shown in FIG. 3C.
- the A2 surface of the workpiece W is arranged to face the machining tool 12 . Therefore, the machining tool 12 can cut the workpiece W from a direction perpendicular to the A2 plane.
- the rotating part 22 When the rotating part 22 further rotates the holding part 21 and positions it at a rotation angle of 180° (170° to 190°) from the reference position, the B1 surface of the workpiece W attached to the front surface 24c1 side is It is arranged opposite to the processing tool 12 . Therefore, the machining tool 12 can cut the workpiece W from a direction perpendicular to the B1 plane. Further rotation causes the rotating part 22 to further rotate the holding part 21 and position it at a position of 270° (260° to 280°) from the reference position. It is arranged opposite to the processing tool 12 . Therefore, the machining tool 12 can cut the workpiece W from a direction perpendicular to the A2 plane.
- the Y-direction moving part 23 is composed of a ball screw mechanism, a rack and pinion mechanism, a crank-slider mechanism, a fluid cylinder that is linearly moved by air pressure, water pressure, or hydraulic pressure, and the like.
- the Y-direction moving section 23 moves the holding section 21 and the rotating section 22 in the Y-axis direction under the control of the control section 31 .
- the Y-direction moving unit 23 can adjust the position of the workpiece W held by the holding unit 21 in the Y-axis direction with respect to the machining tool 12, and the working efficiency and machining accuracy of cutting can be improved.
- each part of the cutting device 10 and each part of the holding device 20 can move and rotate in the above-described directions, the machining tool 12 and the workpiece W held by the holding part 21 can be separated from each other.
- the relative positional relationship can be changed in any direction of the X-axis direction, Y-axis direction and Z-axis direction. Therefore, the workpiece W can be three-dimensionally processed by the processing tool 12 .
- the control device 30 controls the entire operation of the cutting device 100.
- the control device 30 can also function as a design device that designs three-dimensional data used for processing the workpiece W. FIG.
- the control device (NC device) 30 includes a processor such as a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), non-volatile storage such as a hard disk device and flash memory, a communication interface, an external recording It is mainly composed of a personal computer (PC) equipped with a medium interface and the like, a microcomputer, and the like.
- a processor such as a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), non-volatile storage such as a hard disk device and flash memory, a communication interface, an external recording It is mainly composed of a personal computer (PC) equipped with a medium interface and the like, a microcomputer, and the like.
- PC personal computer
- the control device 30 also includes a display section 33, an input section 34, and the like.
- the display unit 33 is composed of a liquid crystal display or the like, and displays screens such as an operation screen of the cutting apparatus 100 and messages.
- the input unit 34 includes a touch panel mounted on the liquid crystal display, a keyboard, a mouse, operation buttons, and the like, and can input various operation instructions and the like to the control device 30 .
- the control device 30 functionally has a control section 31 and a storage section 32 .
- the control unit 31 is composed of a processor
- the storage unit 32 is composed of RAM, ROM, hard disk device, and non-volatile storage.
- the storage unit 32 also includes an external recording medium accessible via an external recording medium interface. Examples of external recording media include SD cards, USB memories, CDs, DVDs, and the like.
- the CPU uses the RAM as a work area to read and execute an operating system and other programs stored in a storage unit 32 such as a ROM, thereby controlling the operation of the cutting apparatus 100 as a whole.
- the storage unit 32 stores the above various programs and parameters used by the programs. Further, the storage unit 32 stores three-dimensional data and the like for use in cutting the workpiece W by the cutting device 100 .
- control unit 31 controls the cutting device 10 and the holding device 20, moves or rotates the spindle 11 and the holding unit 21, and cuts the workpiece W with the machining tool 12.
- the three-dimensional data is a three-dimensional coordinate address representing the three-dimensional shape of the prosthesis P to be cut.
- the three-dimensional data is generated by an external design device or the like and stored in the storage section 32 using an external recording medium such as an SD card. Further, the control device 30 may acquire three-dimensional data from a design device connected to the cutting device 100 via a wired or wireless communication means, and store the data in the storage unit 32 .
- control device 30 may have a function as a design device, and the control device 30 may generate three-dimensional data.
- the patient's tooth, negative mold or positive mold is scanned with a measuring device such as a 3D scanner, and the operator designs the three-dimensional shape of the prosthesis P based on the scan data.
- the control unit 31 of the control device 30 generates three-dimensional data based on this design and stores it in the storage unit 32 .
- Three-dimensional data can be generated using a known method using general-purpose software or the like.
- FIG. 5 An example of the processing operation performed by the cutting apparatus 100 configured as described above will be described below with reference to the flow chart of FIG. 5 and image diagrams of processing in each processing step.
- the figures on the right side of the page of FIG. An image diagram of the workpiece W (prosthesis P1) after the second machining process and an image diagram of the workpiece W (prosthesis P1) after the third machining process from the B2 surface are shown.
- the imaginary dashed line indicates the block-shaped workpiece W before machining
- the dashed line indicates the trajectory of machining by the machining tool 12 .
- the cutting device 10 roughly cuts (trochoids) the workpiece W to produce a prosthesis P1 (crown), and then inserts a hole for covering the patient's tooth or core with the prosthesis P1. Perform inner surface processing to form Also, here, a case where the support 7 is provided on the inner side (lingual side) of the prosthesis P will be described.
- an operator such as a dental technician attaches one or more workpieces W to the holding part 21, and moves the holding part 21 to the rotating part 22 so that the B1 surface of the workpiece W faces upward. It is attached to the rotating member 26 .
- the operator closes the door 4 and inputs an instruction to start cutting from the input unit 34 .
- the control unit 31 receives this instruction input, acquires three-dimensional data for machining from the storage unit 32, controls the cutting device 10 and the holding device 20 based on this three-dimensional data, and starts cutting.
- the cutting device 10 processes the workpiece W from the B1 surface. Therefore, the control unit 31 drives the Z-axis rotation driving unit 13 and the XZ direction moving unit 14 without driving the X-axis rotation driving unit 27 to move and rotate the spindle 11 . Further, the control section 31 drives the Y-direction moving section 23 to move the holding device 20 in the Y-direction. As a result, while the machining tool 12 rotates, it moves in the XYZ directions relative to the workpiece W, and draws a trajectory indicated by a broken line from the B1 plane (from a direction perpendicular to the B1 plane). , trochoidally machine the workpiece W (see FIG. 3B).
- the cutting device 10 performs machining from the A2 surface of the workpiece W. Therefore, the control unit 31 drives the X-axis rotation driving unit 27 to rotate the rotating member 26 together with the prosthesis P1 (workpiece W) and the holding unit 21 by 90° from the reference position, thereby rotating the work piece.
- the A2 surface of W is made to face the processing tool 12 (see FIG. 3C).
- the control unit 31 drives the Z-axis rotation driving unit 13 and the XZ direction moving unit 14 to move and rotate the spindle 11, and drives the Y direction moving unit 23 to move the holding device 20 in the Y direction.
- the machining tool 12 rotates and moves in the XYZ directions relative to the workpiece W, and draws a trajectory shown by a broken line from the A2 plane (from the direction perpendicular to the A2 plane).
- the workpiece W is trochoidally machined.
- finish machining is performed from the B1 and B2 surfaces of the workpiece W to form the final crown shape and support 7. More specifically, from a state in which the A2 surface of the workpiece W faces the processing tool 12, the X-axis rotation drive unit 27 is driven to move the prosthesis P1 (workpiece W) and the holder 21 together. , the rotating member 26 is rotated by 270° so that the B1 surface of the workpiece W faces the machining tool 12 . Then, the processing tool 12 is used to finish the prosthesis P1 from the surface B1.
- the X-axis rotation driving section 27 is driven to rotate the rotating member 26 together with the prosthesis P1 and the holding section 21 by 180° so that the B2 surface of the workpiece W faces the processing tool 12 .
- the processing tool 12 is used to finish the prosthesis P1 from the surface B2.
- This finishing process may be performed between steps S2 and S3, or may be performed after step S3.
- the machining tool 12 used in this finishing process may be the same as or different from that used in the rough machining (trochoidal machining) in step S2.
- the working tool 12 can be replaced.
- the cutting device 10 performs inner surface machining from the B2 surface of the workpiece W. Therefore, the control unit 31 drives the X-axis rotation driving unit 27 to rotate the rotating member 26 together with the prosthesis P1 (workpiece W) and the holding unit 21 from the reference position by 180°, thereby rotating the work piece.
- the B2 surface of W is made to face the processing tool 12. - ⁇
- the machining tool 12 used in the inner surface machining in step S3 may be the same as or different from that used in the rough machining (trochoidal machining) in step S2.
- the machining tool 12 can be exchanged between.
- control unit 31 drives the Z-axis rotation driving unit 13 and the XZ direction moving unit 14 to move and rotate the spindle 11, and drives the Y direction moving unit 23 to move the holding device 20 in the Y direction.
- the machining tool 12 rotates and moves in the XYZ directions relative to the workpiece W, and the inner surface of the workpiece W is machined from the B2 surface (from the direction perpendicular to the B2 surface). to form a hole.
- the cutting apparatus 100 can cut each workpiece W by repeating steps S1 to S3. Moreover, after performing the process of step S1 on all the workpieces W, the cutting apparatus 100 similarly performs the processes of steps S2 and S3 on all the workpieces W, respectively. can also
- the control part 31 moves the XZ direction moving part 14 or the Y
- the direction moving part 23 is driven to move the machining tool 12 relative to the holding part 21 .
- the machining tool 12 performs the first machining process from the B1 surface of the workpiece W on the other surface, and then the rotating part 22 rotates the holding part 21 by 90° (270° from the reference position).
- the machining tool 12 performs the second machining process from the A2 plane.
- the rotating part 22 further rotates the holding part 21 by 90° (360° from the reference position), so that the machining tool 12 performs the third machining step from the B2 surface. Further, after performing the process of step S1 on all the workpieces W on both sides of the front surface 24c1 and the back surface 24c2, the processes of steps S2 and S3 are similarly performed on all workpieces W, respectively. can also be done.
- a support 7 is provided on the lingual side of the prosthesis P1 produced in the above process. This support 7 is separated from the prosthesis P1, and the cut surface is polished by finishing or the like.
- the cut surface of the support 7 is polished so that the shape of the lingual side of the prosthesis P does not change from the designed shape as much as possible.
- polishing the lingual shape as designed required advanced technology.
- the back teeth (molars) may be either the prosthesis P1 in FIG. 4(b) or the prosthesis P2 in FIG.
- the prosthesis P1 provided with the support 7 on the lingual side is suitable.
- the inventors proposed that if the workpiece W can be cut by providing a support 7 at the tip of the prosthesis P, as in the prosthesis P2 shown in FIG. Thought it could be processed.
- the support 7 is provided at the tip of the prosthesis P, the area of the cut surface can be further reduced, the shape change due to polishing can be effectively suppressed, and the user is less likely to feel uncomfortable.
- the cutting device 100 of the present embodiment rotates the workpiece W using the holding device 20 so that the A2 surface of the workpiece W faces the machining tool 12, and the machining tool 12 rotates the A2 surface of the workpiece W. Machining is possible from the direction perpendicular to the surface. Thereby, the processing tool 12 can cut the workpiece W so that the support 7 is provided at the tip.
- the operator attaches one or more workpieces W to the holding part 21, and holds the holding part so that the B1 surface of the workpiece W faces upward. 21 is attached to the rotating member 26 of the rotating part 22 . After that, the operator closes the door 4 and inputs a cutting start instruction from the input unit 34 .
- the cutting device 10 processes the workpiece W from the B1 surface.
- the control unit 31 drives the Z-axis rotation driving unit 13 and the XZ direction moving unit 14 without driving the X-axis rotation driving unit 27 to move and rotate the spindle 11 .
- the control section 31 drives the Y-direction moving section 23 to move the holding device 20 in the Y-direction.
- the machining tool 12 rotates, it moves in the XYZ directions relative to the workpiece W, and draws a trajectory indicated by a broken line from the B1 plane (from a direction perpendicular to the B1 plane). , trochoidally machine the workpiece W (see FIG. 3B).
- the cutting device 10 performs machining from the A2 surface of the workpiece W. Also in this case, the control unit 31 drives the X-axis rotation drive unit 27 to rotate the rotating member 26 together with the prosthesis P1 (workpiece W) and the holding unit 21 from the reference position by 90°, thereby rotating the work piece.
- the A2 surface of W is made to face the processing tool 12 (see FIG. 3C).
- the control unit 31 drives the Z-axis rotation driving unit 13 and the XZ direction moving unit 14 to move and rotate the spindle 11, and drives the Y direction moving unit 23 to move the holding device 20 in the Y direction.
- the machining tool 12 rotates and moves in the XYZ directions relative to the workpiece W, and draws a trajectory shown by a broken line from the A2 plane (from the direction perpendicular to the A2 plane).
- the workpiece W is trochoidally machined.
- finish machining is performed from the B1 and B2 surfaces of the workpiece W to form the final crown shape and support 7. More specifically, from a state in which the A2 surface of the workpiece W faces the processing tool 12, the X-axis rotation drive unit 27 is driven to move the prosthesis P2 (workpiece W) and the holder 21 together. , the rotating member 26 is rotated by 270° so that the B1 surface of the workpiece W faces the machining tool 12 . Then, the processing tool 12 is used to finish the prosthesis P2 from the surface B1.
- the X-axis rotation drive unit 27 is driven to rotate the rotating member 26 together with the prosthesis P2 and the holding unit 21 by 180° so that the B2 surface of the workpiece W faces the processing tool 12 .
- the processing tool 12 is used to finish the prosthesis P2 from the surface B2.
- This finishing process may be performed between steps S12 and S13, or may be performed after step S13.
- the machining tool 12 used in this finishing process may be the same as or different from that used in the rough machining (trochoidal machining) in step S12.
- the working tool 12 can be replaced.
- the cutting device 10 performs inner surface machining from the A2 surface of the workpiece W.
- the A2 surface of the prosthesis P2 faces the processing tool 12
- a hole can be formed by subjecting the inner surface to processing.
- the finishing process is performed before performing the third processing process of step S13, the holding part 21 is rotated so that the A2 surface of the prosthesis P2 faces the processing tool 12.
- the machining tool 12 used for the inner surface machining in step S13 may be the same as or different from that used in the rough machining (trochoidal machining) in step S12.
- the machining tool 12 can be exchanged between.
- the prosthesis P2 with the support 7 provided on the distal end side is obtained as shown in the upper right view of the page of FIG.
- the cutting apparatus 100 repeats the steps S11 to S13 for each workpiece W, or repeats one step for all workpieces W.
- a plurality of workpieces W can be cut by advancing the process while performing the machining on the workpiece W.
- the cutting apparatus 100 processes the workpiece W attached to the other surface of the holding part 21 in the same procedure as described above. It can also be cut.
- the prosthesis P2 having the support 7 on the distal side which is manufactured as described above, has a larger connection portion between the prosthesis P2 and the support 7 than the prosthesis P1 having the support 7 on the lingual side. Small area.
- the support 7 can be cut off and polished easily and quickly, improving work efficiency.
- FIG. 4 (Modified example of workpiece W) (d) and (e) shown in FIG. 4 are diagrams showing the workpieces W1 and W2 of the modification.
- the workpiece W used in the first embodiment is made of a single-color block such as white or milky white. Therefore, the produced prosthesis P is uniform in color and shade. In contrast, natural teeth are darker at the root and gradually lighter toward the tip. For this reason, the prosthesis P is sometimes colored so as to make it closer to the natural tooth.
- the workpieces W1 and W2 of the modified examples are dental materials produced by imitating the color tone of natural teeth and changing the color tone (color or shade) or translucency. More specifically, the workpiece W1 has a continuous change in color tone or translucency from one side surface (B1 surface) intersecting with the A2 surface toward the other side surface (B2 surface) opposite to this one side surface. It is a dental material with a gradation (deeper color or darker density or lower translucency).
- the gradation-applied dental material may be a dental material that has color tone or translucency gradation at the time of processing the workpiece W, such as a multi-layer type resin block or a zirconia sintered body. good.
- the gradation-applied dental material may have gradation in color tone or translucency after sintering, such as a multi-layer type zirconia calcined body or zirconia molded body. It should be noted that the zirconia calcined body or the zirconia molded body does not necessarily have to have a gradation of color tone or translucency.
- the support 7 is provided on the upper right portion of the paper surface of FIG. 5 or on the tongue side as shown in FIG. A shaped prosthesis P1 is obtained.
- the prosthesis P1 has a darker color or density on the root side, and the color gradually fades from the root to the tip, or the prosthesis P1 changes in density from the root to the tip, or the translucency on the root side is low, and A prosthesis P1 is obtained in which the translucency gradually changes toward the tip. For this reason, a coloring step or the like can be omitted, and a high-quality prosthesis P1 that is more efficient and closer to natural teeth can be obtained.
- the workpiece W2 has a gradation in which the color tone or translucency changes continuously from the A1 surface to the opposing A2 surface (the color becomes darker, the density becomes darker, or the translucency becomes lower).
- the support 7 is provided at the upper right part of the paper surface of FIG. 6 or at the tip as shown in FIG. A prosthesis P2 is obtained.
- the prosthesis P2 has a deep color or density on the root side, and the color gradually fades from the root to the tip, or the density changes to light, or the translucency on the root side is low, A prosthesis P2 is obtained in which the translucency gradually changes from the root to the tip. Therefore, a coloring process or the like can be omitted, and a high-quality prosthesis P2 that is more efficient and closer to natural teeth can be obtained.
- the cutting apparatus 100 three-dimensionally changes the relative positional relationship between the machining tool 12 and the block-shaped workpiece W, and the machining tool 12 cuts the workpiece.
- 1 is a cutting device for a dental prosthesis P that cuts W.
- FIG. A pedestal 6 attached to the cutting apparatus 100 is fixed to one surface (A1 surface) of the workpiece W.
- a positioning portion that positions the workpiece W with respect to the processing tool 12 so that the workpiece W is cut from a direction perpendicular to the opposite surface (A2 surface) facing the one surface (A1 surface). (holding device 20).
- the machining method executed by the cutting apparatus 100 according to the first embodiment three-dimensionally changes the relative positional relationship between the machining tool 12 and the block-shaped workpiece W, and A processing method for a dental prosthesis P in which a workpiece W is cut.
- the workpiece W having the pedestal 6 fixed to one surface (A1 surface) is cut from a direction perpendicular to the opposite surface (A2 surface) opposite to the one surface (A1 surface). and a positioning step of positioning with respect to the processing tool 12 .
- the cutting apparatus 100 and the machining method according to the first embodiment the opposite surface (A2 It becomes possible to process the workpiece W from the surface). Therefore, the cutting apparatus 100 and the processing method according to the first embodiment can manufacture the prosthesis P1 in a more appropriate shape and orientation according to the type, design, purpose of use, etc. of the prosthesis P1 to be manufactured. As a result, there is no restriction on the shape and orientation of the dental prosthesis P, the degree of freedom in cutting is improved, and the dental prosthesis P can be cut efficiently in a short time with high accuracy. A cutting apparatus 100 and a machining method can be provided.
- the cutting apparatus 100 in addition to cutting from the vertical direction with respect to the side surface (B1 surface) of the workpiece W as in the conventional art, the A2 surface of the workpiece W In contrast, cutting from the vertical direction is possible. As a result, it is possible to perform rough machining by trochoidal machining from two directions, and to significantly shorten the machining time.
- the positioning unit (holding device 20) of the first embodiment includes a holding unit 21 that holds the workpiece W via the pedestal 6, and an axis ( and a rotating portion 22 that rotates about the X axis).
- the rotating part 22 is configured to position the workpiece W by rotating the holding part 21 at a rotation angle of 80° to 100° with respect to a predetermined reference position.
- the positioning unit (holding device 20) rotates the workpiece W so that one surface (A2 surface) is appropriately opposed to the processing tool 12, and suppresses wobble and unexpected movement. can stably position the workpiece W. Therefore, the processing tool 12 can perform processing from one surface (A2 surface) with higher accuracy.
- the holding part 21 of the first embodiment is configured to hold a plurality of workpieces W so as to be aligned in a predetermined direction via the pedestal 6, and the rotating part 22 holds the plurality of workpieces W. It is configured to rotate the holding portion 21 with an axis (X-axis) parallel to the alignment direction as a rotation axis.
- the cutting apparatus 100 can process a plurality of workpieces W made of the same material or different materials at the same time using the same three-dimensional data without replacing the workpieces W, thereby increasing production efficiency. Efficiency can be improved.
- the holding part 21 of the first embodiment is configured to hold the workpieces W on both sides along the rotation axis, thereby increasing the number of workpieces W made of the same material or different materials. can be processed at the same time, further improving production efficiency.
- the rotating part 22 rotates the holding part 21 at a rotation angle of 80° to 100° and a rotation angle of 260° to 280° with respect to a predetermined reference position, thereby positioning the workpiece W. It is desirable to be configured as follows.
- the holding part 21 is configured so that the A2 surface of the workpiece W attached to one surface (back surface 24c2) of the holding unit 21 and the A2 surface of the workpiece W attached to the opposite surface (front surface 24c1) are respectively It becomes possible to face the machining tool 12 precisely. Therefore, the processing tool 12 can more appropriately perform cutting from the A2 surface.
- the cutting apparatus 100 of the first embodiment is arranged from one surface (A1 surface) toward the opposite surface (A2 surface), or from one side surface (B1 surface) that intersects with the one surface to the other side surface ( It is also possible to cut the workpieces W1 and W2 having a gradation in which the color tone or translucency changes continuously toward the surface B2). For this reason, it is possible to omit the coloring process after cutting and finishing, and it is possible to obtain high-quality prostheses P1 and P2 that are more efficient and closer to natural teeth.
- the holding device 20 three-dimensionally changes the relative positional relationship between the machining tool 12 and the block-shaped workpiece W, and cuts the workpiece W with the machining tool 12. It is a holding device that is provided in the cutting device 100 for the dental prosthesis P and holds the workpiece W. As shown in FIG.
- the holding device 20 includes a holding portion 21 that holds a plurality of workpieces to which a pedestal 6 is fixed on one surface (A1 surface) so as to be aligned in a predetermined direction via the pedestal 6, and holding portions 21 that are arranged in a plurality of positions.
- the workpiece W is rotated with the axis (X-axis) parallel to the direction in which the workpiece W is arranged as the rotation axis, and the workpiece W is cut from the direction perpendicular to the opposite surface (A2 surface) facing the one surface (A1 surface).
- a rotating part 22 for positioning relative to the machining tool 12 to be machined.
- the cutting device 100 having this holding device 20 can machine the workpiece W from the opposing surface (A2 surface) opposite to the one surface (A1 surface), and can cut a plurality of workpieces W into short lengths. It becomes possible to process efficiently and with high precision in time.
- a plurality of workpieces W made of the same material or a plurality of workpieces W made of different materials can be held by the holding unit 21, and it is necessary to exchange workpieces W, exchange three-dimensional data, and the like. Therefore, a plurality of workpieces W made of different materials can be processed at the same time, and production efficiency can be improved. It is also possible to attach the holding device 20 of the first embodiment to an existing cutting device.
- a plurality of workpieces W can be arranged side by side on both sides of the holding body 24 of the holding part 21, and the rotating part 22 is positioned at an angle of 80° to 100° with respect to the reference position.
- the holding part 21 is rotated at a rotation angle of 260° to 280°.
- one or a plurality of workpieces W can be attached only to the front surface 24c1 or the rear surface 24c2 of the holding body 24 of the holding part 21.
- the rotating portion 22 rotates the holding portion 21 clockwise or counterclockwise at a rotation angle of at least 80° to 100° (preferably 90°), and at this rotation position, the holding portion 21 is rotated.
- a configuration for positioning the workpiece W can also be used. With this configuration as well, the workpiece W attached to the front surface 24c1 or the rear surface 24c2 can be cut by the processing tool 12 from the direction perpendicular to the A2 surface, which improves the degree of freedom of processing and improves efficiency. processing becomes possible.
- the holding unit 20 is provided with the holding unit 21 and the rotating unit 22, and the workpiece W is rotated to function as a positioning unit that positions the processing tool 12.
- the configuration of the positioning portion is not limited to this, and the workpiece W may be positioned relative to the machining tool 12 .
- the processing tool 12 can be rotated around the X axis (around the axis parallel to the longitudinal direction of the holding unit 21), or the processing tool 12 can be moved in the XYZ directions. By doing so, the workpiece W can also be positioned with respect to the machining tool 12 .
- the holding device 20, which is a positioning unit causes the A2 surface of the workpiece W to face the processing tool 12, and the processing tool 12 can process the workpiece W from the direction perpendicular to the A2 surface. .
- the cutting apparatus 100 of the first embodiment rotates the holding portion 21 by the X-axis rotation driving portion 27 such as an electric motor
- the configuration is not limited to this configuration, and, for example, a configuration in which the holding portion 21 is rotated manually is adopted. can also [Cross reference to related application]
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- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Dental Prosthetics (AREA)
Abstract
Description
以下、第1実施形態に係る保持装置及びこの保持装置を備えた歯科用補綴物の切削加工装置について、図面を参照しながら説明する。なお、本開示において「切削加工」とは、被加工物から歯科用補綴物を削り出す加工全般を意図し、例えば、切削加工、研削加工等が含まれる。図1は第1実施形態に係る保持装置20を備えた切削加工装置100の概略構成を示す図であり、図2は、切削加工装置100の概略構成を示すブロック図である。
図4に示す(d)及び(e)は、変形例の被加工物W1,W2を示す図である。上記第1実施形態で用いた被加工物Wは、白、乳白色等の一色のブロック体からなる。このため、作製される補綴物Pは色や濃淡が均一である。これに対して、天然歯は、根元の色が濃く、先端に向かって次第に淡くなっている。このため、天然歯により近づけるべく、補綴物Pは、着色を施されることがある。
[関連出願への相互参照]
Claims (12)
- 加工工具とブロック型の被加工物との相対的な位置関係を3次元で変化させ、前記加工工具により前記被加工物を切削加工する歯科用補綴物の切削加工装置であって、
前記被加工物は、一面(A1面)に前記切削加工装置へ取り付ける台座が固定され、
前記被加工物が、前記一面(A1面)と対向する対向面(A2面)に対して、垂直方向から切削加工されるように、前記被加工物を前記加工工具に対して位置決めする位置決め部、を備える
切削加工装置。 - 前記位置決め部は、前記被加工物を、前記台座を介して保持する保持部と、
前記保持部を、前記一面と平行な軸を回転軸として回転させる回転部と、を備え、
前記回転部は、所定の基準位置に対して、80°~100°の回転角度で前記保持部を回転させ、前記被加工物の位置決めをするように構成される
請求項1に記載の切削加工装置。 - 前記保持部は、複数の前記被加工物を、所定方向に並ぶように前記台座を介して保持するように構成され、
前記回転部は、複数の前記被加工物の並び方向に平行な軸を回転軸として前記保持部を回転させるように構成される
請求項2に記載の切削加工装置。 - 前記保持部は、前記回転軸に沿って両側に、前記被加工物を保持するように構成される
請求項2に記載の切削加工装置。 - 前記回転部は、所定の基準位置に対して、80°~100°の回転角度、及び260°~280°の回転角度で前記保持部を回転させ、前記被加工物の位置決めをするように構成される
請求項2に記載の切削加工装置。 - 前記切削加工装置は、前記一面(A1面)から前記対向面(A2面)に向かって、又は前記一面と交差する一側面(B1面)から当該一側面と対向する他側面(B2面)に向かって、連続的に色調又は透光性が変化するグラデーションが施された前記被加工物を切削加工する
請求項1に記載の切削加工装置。 - 垂直方向からの切削加工は、少なくとも前記加工工具の側面で前記被加工物を加工することを含む、請求項1に記載の切削加工装置。
- 垂直方向からの切削加工は、前記被加工物をトロコイド加工することを含む、請求項1に記載の切削加工装置。
- 加工工具とブロック型の被加工物との相対的な位置関係を3次元で変化させ、前記加工工具により前記被加工物を切削加工する歯科用補綴物の切削加工装置に備えられ、前記被加工物を保持する保持装置であって、
一面(A1面)に台座が固定された複数の前記被加工物を、所定方向に並ぶように前記台座を介して保持する保持部と、
前記保持部を、複数の前記被加工物の並び方向に平行な軸を回転軸として回転させ、前記被加工物を、前記一面(A1面)と対向する対向面(A2面)に対して、垂直方向から切削加工されるように前記加工工具に対して位置決めする回転部と、を備える
保持装置。 - 加工工具とブロック型の被加工物との相対的な位置関係を3次元で変化させ、前記加工工具により前記被加工物を切削加工する歯科用補綴物の加工方法であって、
一面(A1面)に台座が固定されている前記被加工物を、前記一面(A1面)と対向する対向面(A2面)に対して、垂直方向から切削加工されるように前記加工工具に対して位置決めする位置決め工程、を有する
加工方法。 - 垂直方向から前記被加工物を切削加工する加工工程を含み、前記加工工程は、少なくとも前記加工工具の側面で前記被加工物を加工する工程を含む、請求項10に記載の加工方法。
- 垂直方向から前記被加工物を切削加工する加工工程を含み、前記加工工程は、前記被加工物をトロコイド加工する工程を含む、請求項10に記載の加工方法。
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JP2002320626A (ja) * | 2001-03-26 | 2002-11-05 | Kaltenbach & Voigt Gmbh & Co | 歯科医療加工物を製造するための切削/研削機 |
JP2015054119A (ja) | 2013-09-12 | 2015-03-23 | ローランドディー.ジー.株式会社 | 人工歯作製装置 |
JP2017080633A (ja) * | 2017-02-21 | 2017-05-18 | ローランドディー.ジー.株式会社 | 保持部材 |
JP2019076416A (ja) * | 2017-10-25 | 2019-05-23 | Dgshape株式会社 | 歯科用技工物の加工方法 |
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JP2002320626A (ja) * | 2001-03-26 | 2002-11-05 | Kaltenbach & Voigt Gmbh & Co | 歯科医療加工物を製造するための切削/研削機 |
JP2015054119A (ja) | 2013-09-12 | 2015-03-23 | ローランドディー.ジー.株式会社 | 人工歯作製装置 |
JP2017080633A (ja) * | 2017-02-21 | 2017-05-18 | ローランドディー.ジー.株式会社 | 保持部材 |
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