WO2014137037A1 - 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법 - Google Patents
색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법 Download PDFInfo
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- WO2014137037A1 WO2014137037A1 PCT/KR2013/006513 KR2013006513W WO2014137037A1 WO 2014137037 A1 WO2014137037 A1 WO 2014137037A1 KR 2013006513 W KR2013006513 W KR 2013006513W WO 2014137037 A1 WO2014137037 A1 WO 2014137037A1
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- zirconia
- based powder
- colored
- content
- white
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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
- A61C13/08—Artificial teeth; Making same
- A61C13/081—Making teeth by casting or moulding
-
- 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
- A61C13/20—Methods or devices for soldering, casting, moulding or melting
-
- 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
- A61C13/08—Artificial teeth; Making same
- A61C13/083—Porcelain or ceramic teeth
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/10—Ceramics or glasses
-
- 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
- A61C13/08—Artificial teeth; Making same
- A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth
Definitions
- the present invention relates to a method of manufacturing an artificial zirconia block, and more particularly, to a method of manufacturing an artificial tooth zirconia block having a color gradient used in a dental or dental laboratory.
- Zirconia artificial teeth have excellent biocompatibility, excellent aesthetic function compared to metal, high mechanical properties (more than 1,000MPa of flexural strength, 9 ⁇ 10MPa ⁇ m 1/2 of fracture toughness), and dental card Automatic production is possible by using the Digital CAD / CAM system, and the productivity is very high, and both anterior and posterior parts can be used.
- tooth colors vary widely and are often used as a guide.
- the color guides commonly used are classified into A series, B series, C series, D series, etc.
- the roots are A3
- the body is A2
- the cusp is A1.
- porcelain powder or liquid color set is used.
- zirconia blocks have a very simple form of white or only one color. Therefore, in order to produce the same color as the actual natural teeth, the zirconia block must undergo complex processes such as pigment treatment and surface treatment after the zirconia block is processed. .
- the problem to be solved by the present invention is to provide a zirconia block manufacturing method that can express the aesthetics of natural teeth without using a ceramic material or a liquid color set by implementing the color gradient that natural teeth have in the zirconia block itself.
- the present invention (a) preparing a colored zirconia-based powder and a white zirconia-based powder, and (b) mixing the colored zirconia-based powder and the white zirconia-based powder while varying the mixing ratio to produce a desired color gradient Preparing a plurality of raw materials in which colored zirconia-based powders and the white zirconia-based powders are mixed in different weight ratios, and (c) content of the colored zirconia-based powders in the order of the raw materials having a high content of the colored zirconia-based powders or the contents of the colored zirconia-based powders.
- the cold hydrostatic pressure is a pressure in the range of 10 ⁇ 200MPa for the molded product It is desirable to be applied.
- the colored zirconia-based powder is mixed with an organic binder, the organic binder is 0.1 to 7 parts by weight with respect to 100 parts by weight of the colored zirconia-based powder, the white zirconia-based powder is mixed with an organic binder and the organic binder May be 0.1 to 7 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- an organic binder is also mixed together, and the organic binder may be mixed in an amount of 0.1 to 7 parts by weight based on 100 parts by weight of each raw material. have.
- the degreasing process is preferably carried out at a temperature of 400 ⁇ 800 °C.
- the plurality of raw materials are composed of 7 to 20 raw materials having different mixing ratios of colored zirconia-based powders and white zirconia-based powders, and the molded product forms a structure in which 7 to 20 raw materials are sequentially stacked. It is preferable.
- the content of the colored zirconia-based powder is increased at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is reduced at a constant rate or the colored zirconia-based
- the content of the powder may be reduced at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder may be increased at a constant ratio.
- the plurality of raw materials may be colored.
- the content of the zirconia-based powder increases in a certain ratio and the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is sequentially injected in the order of decreasing the content, or the content of the colored zirconia-based powder is Become smaller at a certain rate and the colored zir
- the amount of the zirconia-based white powder corresponding to the content of California-based powder in order to be more at a predetermined ratio may be introduced sequentially.
- the colored zirconia-based powder is a powder formed by mixing a zirconia powder and a metal oxide for making a color, followed by firing, and the metal oxide is red iron oxide (Fe 2 O 3 ), yellow iron oxide (Fe 2 O 3 ), and MoO. 3 , MnO 2 , CeO 2 , BaO, V 2 O 5 , V 2 O 3 It may be made of one or more materials selected from CoO.
- the calcination is preferably carried out at a temperature of 800 ⁇ 1100 °C in an oxidizing atmosphere.
- the present invention (a) preparing a colored zirconia-based powder and a white zirconia-based powder, and (b) mixing the colored zirconia-based powder and the white zirconia-based powder while varying the mixing ratio to produce a desired color gradient Preparing a plurality of raw materials in which the colored zirconia-based powders and the white zirconia-based powders are mixed in different weight ratios, and (c) the colored zirconia-based powders in order of the raw materials having a high content of the colored zirconia-based powders or the colored zirconia-based powders.
- a step of zirconia blocks for artificial teeth having a color gradient comprising calcining Provide corrective measures.
- the cold hydrostatic pressure is a pressure in the range of 10 ⁇ 200MPa for the molded product It is desirable to be applied.
- the colored zirconia-based powder is mixed with an organic binder, the organic binder is 0.1 to 7 parts by weight with respect to 100 parts by weight of the colored zirconia-based powder, the white zirconia-based powder is mixed with an organic binder and the organic binder May be 0.1 to 7 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- an organic binder is also mixed together, and the organic binder may be mixed in an amount of 0.1 to 7 parts by weight based on 100 parts by weight of each raw material. have.
- the degreasing process is preferably carried out at a temperature of 400 ⁇ 800 °C.
- the plurality of raw materials are composed of 7 to 20 raw materials having different mixing ratios of colored zirconia-based powders and white zirconia-based powders, and the molded product forms a structure in which 7 to 20 raw materials are sequentially stacked. It is preferable.
- the content of the colored zirconia-based powder is increased at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is reduced at a constant rate or the colored zirconia-based
- the content of the powder may be reduced at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder may be increased at a constant ratio.
- the plurality of raw materials may be colored.
- the content of the zirconia-based powder increases in a certain ratio and the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is sequentially injected in the order of decreasing the content, or the content of the colored zirconia-based powder is Become smaller at a certain rate and the colored zir
- the amount of the zirconia-based white powder corresponding to the content of California-based powder in order to be more at a predetermined ratio may be introduced sequentially.
- the colored zirconia-based powder is a powder formed by mixing a zirconia powder and a metal oxide for making a color, followed by firing, and the metal oxide is red iron oxide (Fe 2 O 3 ), yellow iron oxide (Fe 2 O 3 ), and MoO. 3 , MnO 2 , CeO 2 , BaO, V 2 O 5 , V 2 O 3 It may be made of one or more materials selected from CoO.
- the calcination is preferably carried out at a temperature of 800 ⁇ 1100 °C in an oxidizing atmosphere.
- the color gradient of the natural teeth can be implemented in the zirconia block itself, so that the aesthetics of the natural teeth can be expressed without using a ceramic material or a liquid color set.
- the operator can save about 30% of the time, devoted to producing quality prostheses, and there is no burden for color changes from the operator's point of view. Convenient procedures are possible to suit the condition of the oral cavity.
- the zirconia block itself contains color, the original color can be maintained even after the procedure, thereby increasing patient satisfaction.
- FIG. 1 is a view showing a state in which 10 raw materials are sequentially stacked in a compression molding mold in order of a raw material having a high content of colored zirconia-based powder.
- FIG. 2 is a view showing a state in which 10 raw materials are sequentially stacked on a molding mold in order of a raw material having a high content of colored zirconia-based powder.
- FIG. 3 is a photograph showing a zirconia block having a color gradient prepared according to the experimental example.
- Method for producing a artificial zirconia block having a color gradient (a) preparing a colored zirconia-based powder and a white zirconia-based powder, and (b) to produce a desired color gradient Preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed in different weight ratios by mixing the colored zirconia-based powder and the white zirconia-based powder with different mixing ratios, and (c) the colored Sequentially injecting the plurality of raw materials into a compression molding mold in the order of raw materials having a high content of zirconia-based powder or in the order of the raw materials having low content of colored zirconia-based powder, and (d) injecting the plurality of raw materials Molding by applying pressure to the press-molded mold and (e) forming result Calcining the water.
- the manufacturing method of the artificial zirconia block having a color gradient according to another embodiment of the present invention, (a) preparing a colored zirconia-based powder and a white zirconia-based powder, and (b) a desired color gradient Preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed in different weight ratios by mixing the colored zirconia-based powder and the white zirconia-based powder with different mixing ratios to produce a different weight ratio, and (c) (B) injecting the plurality of raw materials together with the sheet material into a mold in order to form the raw materials having a high content of the colored zirconia-based powder or the raw materials having a low content of the colored zirconia-based powder; Demolding the molded product from the mold and (e) calcining the demolded product. And a step.
- the color is used to mean a color other than white, it is used to include not only chromatic color but also achromatic color other than white.
- Zirconium is a transition metal of the fifth cycle belonging to the titanium group on the periodic table and is an element having extremely high corrosion resistance to acids and alkalis.
- An oxide of this zirconium is zirconium oxide, commonly referred to as zirconia.
- Zirconia (ZrO 2 ) has excellent properties such as high strength, thermal stability and high corrosion resistance.
- Zirconia block is a material of artificial teeth, which is closer to natural teeth than conventional ceramic and gold prosthetics, so the aesthetic effect is excellent.
- zirconia blocks are excellent in biocompatibility and do not cause any inflammation or allergy, and are not semi-permanent because they do not corrode, and do not distort discoloration in any food intake, and because they have low thermal conductivity, they are less responsive to cold or hot. Patient satisfaction is very high.
- the color guides commonly used are classified into A series, B series, C series, D series, etc.
- the roots are A3
- the body is A2
- the cusp is A1.
- porcelain powder or liquid color set is used.
- zirconia blocks have a very simple form of white or only one color. Therefore, in order to produce the same color as the actual natural teeth, the zirconia block must undergo complex processes such as pigment treatment and surface treatment after the zirconia block is processed. .
- the zirconia block has the same color gradient as natural teeth, it does not need to work like pigment treatment and surface treatment to produce the same color as natural teeth after processing the zirconia block, which can drastically reduce work time and produce high quality artificial teeth. . From the point of view of the clinical practitioner, it is possible to perform a convenient procedure according to the patient's oral condition without burden of color change, and since the block itself has a color gradient, the original color can be maintained even after the procedure, thereby maximizing patient satisfaction.
- a zirconia block having a natural color gradient In order to manufacture a zirconia block having a natural color gradient, colored zirconia-based raw materials (color raw materials) and white zirconia-based raw materials (white raw materials) are blended in an appropriate component ratio, and compressed into a mold or a manufacturing container of a shape to be molded according to an appropriate component ratio. Molding is carried out by molding or slip casting, and the molded body is degreased and calcined.
- Method for producing a zirconia block for artificial teeth having a color gradient according to the first preferred embodiment of the present invention, (a) preparing a colored zirconia-based powder and a white zirconia-based powder, (b) producing a desired color gradient Preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed in different weight ratios by mixing the colored zirconia-based powder and the white zirconia-based powder with different mixing ratios, and (c) the Sequentially injecting the plurality of raw materials into the compression molding mold in the order of the raw materials having a high content of the colored zirconia-based powder or the raw materials having the low content of the colored zirconia-based powder, and (d) Molding by applying pressure to the injected compression molding mold; and (e) forming the formed texture. It provides a method for producing zirconia blocks for artificial teeth having a color gradient comprising the step of calcining the water.
- Method for producing a artificial zirconia block having a color gradient (a) preparing a colored zirconia-based powder and a white zirconia-based powder, and (b) producing a desired color gradient Preparing a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed in different weight ratios by mixing the colored zirconia-based powder and the white zirconia-based powder with different mixing ratios, and (c) the (B) molding the plurality of raw materials by sequentially injecting them together with a sheet member into a molding mold in order of a raw material having a high content of colored zirconia-based powder or a raw material having a low content of colored zirconia-based powder; Demolding the resulting product from the mold and (e) calcining the demolded molding product It includes.
- the cold hydrostatic pressure is a pressure in the range of 10 ⁇ 200MPa for the molded product It is desirable to be applied.
- the colored zirconia-based powder is mixed with an organic binder, the organic binder is 0.1 to 7 parts by weight with respect to 100 parts by weight of the colored zirconia-based powder, the white zirconia-based powder is mixed with an organic binder and the organic binder May be 0.1 to 7 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- an organic binder is also mixed together, and the organic binder may be mixed in an amount of 0.1 to 7 parts by weight based on 100 parts by weight of each raw material. have.
- the degreasing process is preferably carried out at a temperature of 400 ⁇ 800 °C.
- the plurality of raw materials are composed of 7 to 20 raw materials having different mixing ratios of colored zirconia-based powders and white zirconia-based powders, and the molded product forms a structure in which 7 to 20 raw materials are sequentially stacked. It is preferable.
- the content of the colored zirconia-based powder is increased at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is reduced at a constant rate or the colored zirconia-based
- the content of the powder may be reduced at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder may be increased at a constant ratio.
- the plurality of raw materials may be colored.
- the content of the zirconia-based powder increases in a certain ratio and the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is sequentially injected in the order of decreasing the content, or the content of the colored zirconia-based powder is Become smaller at a certain rate and the colored zir
- the amount of the zirconia-based white powder corresponding to the content of California-based powder in order to be more at a predetermined ratio may be introduced sequentially.
- the colored zirconia-based powder is a powder formed by mixing a zirconia powder and a metal oxide for making a color, followed by firing, and the metal oxide is red iron oxide (Fe 2 O 3 ), yellow iron oxide (Fe 2 O 3 ), and MoO. 3 , MnO 2 , CeO 2 , BaO, V 2 O 5 , V 2 O 3 It may be made of one or more materials selected from CoO.
- the calcination is preferably carried out at a temperature of 800 ⁇ 1100 °C in an oxidizing atmosphere.
- various raw materials may be used in addition to colored zirconia-based powders and white zirconia-based powders.
- a method of producing a zirconia block having a color gradient using a compression molding method is described.
- a colored zirconia-based powder and a white zirconia-based powder are prepared.
- Zirconia-based powder is selected in consideration of shape, molding conditions, powder size, blending components and the like.
- the zirconia-based powder preferably has an average particle diameter of about 100 nm to 10 ⁇ m, and preferably has a spherical shape.
- the white zirconia-based powder is white zirconia powder without color.
- An organic binder for facilitating molding may be added to the white zirconia-based powder to be mixed.
- the organic binder is preferably added 0.1 to 7 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- the colored zirconia-based powder may be a powder formed by mixing a zirconia powder and a metal oxide for making a color and then baking.
- Metal oxides to be colored include red iron oxide (Fe 2 O 3 ), yellow iron oxide (Fe 2 O 3 ), yellow MoO 3 , ivory or brown MnO 2 , yellow CeO 2 , yellow BaO, V 2 O 5 representing an orange color, V 2 O 3 representing a black color, CoO representing a black color, or a mixture thereof may be used.
- An organic binder for facilitating molding may be added to the colored zirconia-based powder and mixed. In this case, the organic binder is preferably added 0.1 to 7 parts by weight based on 100 parts by weight of the colored zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- colored zirconia-based powders and white zirconia-based powders are mixed with different mixing ratios to prepare a plurality of raw materials in which weight ratios of colored zirconia-based powders and white zirconia-based powders are different from each other.
- the plurality of raw materials is such that the amount of colored zirconia-based powder and the amount of white zirconia-based powder have a sequential ratio in order to produce a desired color gradient.
- the mixing ratio of the colored zirconia-based powder and the white zirconia-based powder can be adjusted in several to several tens of steps according to the desired color gradient.
- the content of the colored zirconia-based powder is increased at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is reduced at a constant rate or the colored zirconia-based
- the content of the powder may be reduced at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder may be increased at a constant rate.
- Table 1 below raw materials 1 to 10 prepared by mixing colored zirconia-based powders and white zirconia-based powders in different weight ratios are prepared.
- raw material 1 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 10: 0, and raw material 2 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 9: 1
- Raw material 3 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 8: 2
- raw material 4 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 7: 3
- raw material 5 is colored
- the zirconia-based powder and the white zirconia powder are prepared by mixing in a weight ratio of 6: 4
- the raw material 6 is prepared by mixing the colored zirconia-based powder and the white zirconia powder in a weight ratio of 5: 5
- the raw material 7 is colored zirconia-based powder and White zirconia powder is prepared by mixing in a weight ratio of 4: 6
- raw material 8 is colored zirconia-based powder and white
- the raw material 9 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 2: 8
- the raw material 10 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 1: 9. do.
- the organic binder is not mixed with the colored zirconia-based powder and the white zirconia-based powder
- the organic binder is added and mixed in this step.
- the organic binder is preferably added in an amount of 0.1 to 7 parts by weight based on 100 parts by weight of the total content of the white zirconia-based powder and the white zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- a compression molding mold 10 is prepared to mold the zirconia-based powder.
- the compression molding mold 10 may include an upper punch 20 and a lower punch 30.
- a plurality of raw materials in which the colored zirconia-based powder and the white zirconia-based powder are mixed at a target ratio are injected into the mold 10.
- the mixing ratio of the colored zirconia-based powder and the white zirconia-based powder is divided into a plurality of stages, and a plurality of raw materials are sequentially injected into the compression molding mold 10.
- the plurality of steps may be adjusted in several to several tens of steps according to a desired color gradient.
- the plurality of raw materials are sequentially injected into the compression molding mold 10 in the order of the raw materials having the high content of the colored zirconia-based powder or the raw materials having the low content of the colored zirconia-based powder.
- the plurality of raw materials are sequentially injected in the order of increasing the content of the colored zirconia-based powder at a constant rate and decreasing the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder at a constant ratio, It is preferable that the content of the colored zirconia-based powder is sequentially injected in the order of decreasing the content of the colored zirconia-based powder and increasing the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder at a constant ratio.
- the blending ratio consisting of 10 steps is used, and the blending ratio from the raw material 1 to the raw material 10 is exemplarily shown in Table 1 above.
- the raw material 1 disposed at the bottom of the compression molding mold 10 uses a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 10: 0, and the raw material 2 disposed on the raw material 1 is colored zirconia-based.
- Powder and white zirconia powder is used is mixed in a weight ratio of 9: 1, and the raw material 3 disposed above the raw material 2 is used a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 8: 2,
- the raw material 3 disposed on top of the raw material 3 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 7: 3
- the raw material 5 disposed on the raw material 4 is composed of colored zirconia-based powder and white zirconia powder 6
- the raw material 6 disposed above the raw material 5 and mixed in a weight ratio of 4: 4 is colored zirconia-based powder and white zirconia powder of 5: 5.
- the raw material 7 is mixed in a weight ratio
- the raw material 7 disposed on the raw material 6 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 4: 6
- the raw material 8 disposed on the raw material 7 is colored.
- a zirconia-based powder and a white zirconia powder are mixed in a weight ratio of 3: 7
- a raw material 9 disposed above the raw material 8 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 2: 8.
- the raw material 10 disposed on the raw material 9 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 1: 9.
- the mold 10 into which the plurality of raw materials are injected is compression-molded in a desired form using a press at a predetermined pressure (for example, a pressure between 1 to 3 tons).
- Cold Isotropic Press is performed to maintain uniform density distribution inside the molded product.
- the cold hydrostatic pressure is preferably applied for 1 to 120 minutes at a pressure in the range of 10 to 200 MPa with respect to the compression molded product.
- a degreasing process for burning and removing the binder and the like from the compression molded product is performed.
- the degreasing process is preferably carried out for about 1 to 120 hours at a temperature of about 400 ⁇ 800 °C.
- the degreasing process is preferably performed in an oxidizing (oxygen (O 2 ) or air) atmosphere.
- the calcination process is preferably performed for 10 minutes to 48 hours at a calcination temperature of about 800 ⁇ 1100 °C. It is preferable to increase the temperature at a heating rate of 1 to 50 ° C./min until the calcination temperature. If the temperature rising rate is too slow, it takes a long time to decrease productivity, and if the temperature rising rate is too fast, thermal stress may be applied by a sudden temperature rise. Since it is possible to raise the temperature at a temperature rising rate in the above range, it is preferable.
- the calcination is preferably carried out in an oxidizing atmosphere (for example, oxygen (O 2 ) or air atmosphere).
- an oxidizing atmosphere for example, oxygen (O 2 ) or air atmosphere.
- the furnace temperature is lowered to unload the calcined product.
- the furnace cooling may be allowed to cool down in a natural state by turning off the furnace power source, or to set a temperature drop rate (eg, 10 ° C./min) arbitrarily. It is desirable to keep the pressure inside the furnace constant while the furnace temperature is lowered.
- the binder remaining in the calcination process is burned and removed.
- the calcined result is loaded into a milling machine such as a computerized numerical controller (CNC) and processed according to the desired zirconia block geometry.
- CNC computerized numerical controller
- a computer-aided design (CAD) / computer-aided manufacturing (CAM) process may be used for the processing.
- the finished product is washed thoroughly and dried.
- the drying is preferably performed for 10 minutes to 24 hours at a temperature of about room temperature to 150 °C.
- a method of producing a zirconia block having a color gradient using a slip casting method is described.
- a colored zirconia-based powder and a white zirconia-based powder are prepared.
- Zirconia-based powder is selected in consideration of shape, molding conditions, powder size, blending components and the like.
- the zirconia-based powder preferably has an average particle diameter of about 100 nm to 10 ⁇ m, and preferably has a spherical shape.
- the white zirconia-based powder is a white zirconia-based powder that does not have a color.
- An organic binder for facilitating molding may be added to the white zirconia-based powder to be mixed.
- the organic binder is preferably added 0.1 to 7 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- the colored zirconia-based powder may be a powder formed by mixing a zirconia powder and a metal oxide for making a color and then baking.
- Metal oxides to be colored include red iron oxide (Fe 2 O 3 ), yellow iron oxide (Fe 2 O 3 ), yellow MoO 3 , ivory or brown MnO 2 , yellow CeO 2 , yellow BaO, V 2 O 5 representing an orange color, V 2 O 3 representing a black color, CoO representing a black color, or a mixture thereof may be used.
- An organic binder for facilitating molding may be added to the colored zirconia-based powder and mixed. In this case, the organic binder is preferably added 0.1 to 7 parts by weight based on 100 parts by weight of the colored zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- colored zirconia-based powders and white zirconia-based powders are mixed with different mixing ratios to prepare a plurality of raw materials in which weight ratios of colored zirconia-based powders and white zirconia-based powders are different from each other.
- the plurality of raw materials is such that the amount of colored zirconia-based powder and the amount of white zirconia-based powder have a sequential ratio in order to produce a desired color gradient.
- the mixing ratio of the colored zirconia-based powder and the white zirconia-based powder can be adjusted in several to several tens of steps according to the desired color gradient.
- the content of the colored zirconia-based powder is increased at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder is reduced at a constant rate or the colored zirconia-based
- the content of the powder may be reduced at a constant rate and the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder may be increased at a constant rate.
- raw materials 1 to 10 prepared by blending colored zirconia-based powder and white zirconia-based powder in different weight ratios are prepared.
- raw material 1 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 10:
- raw material 2 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 9:
- Raw material 3 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 8:
- raw material 4 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 7: 3
- raw material 5 is colored
- the zirconia-based powder and the white zirconia powder are prepared by mixing in a weight ratio of 6: 4
- the raw material 6 is prepared by mixing the colored zirconia-based powder and the white zirconia powder in a weight ratio of 5: 5
- the raw material 7 is colored zirconia-based powder and
- the raw material 9 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 2: 8
- the raw material 10 is prepared by mixing colored zirconia-based powder and white zirconia powder in a weight ratio of 1: 9. do.
- the organic binder is not mixed with the colored zirconia-based powder and the white zirconia-based powder
- the organic binder is added and mixed in this step.
- the organic binder is preferably added in an amount of 0.1 to 7 parts by weight based on 100 parts by weight of the total content of the white zirconia-based powder and the white zirconia-based powder.
- a generally known material such as polyvinyl alcohol (PVA) may be used, and the organic binder is not limited thereto.
- a mold of the desired shape In order to produce a desired color gradient, a plurality of raw materials and a sheet material mixed with a colored zirconia-based powder and a white zirconia-based powder in a target ratio are injected into the mold 40.
- the compounding ratio of the colored zirconia-based powder and the white zirconia-based powder is divided into a plurality of stages, and a plurality of raw materials are sequentially injected into the mold 40 together with the transfer material.
- the plurality of steps may be adjusted in several to several tens of steps according to a desired color gradient.
- the plurality of raw materials are sequentially injected into the mold 40 in the order of the raw materials having the high content of the colored zirconia-based powder or the raw materials having the low content of the colored zirconia-based powder.
- the plurality of raw materials are sequentially injected in the order of increasing the content of the colored zirconia-based powder at a constant rate and decreasing the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder at a constant ratio, It is preferable that the content of the colored zirconia-based powder is sequentially injected in the order of decreasing the content of the colored zirconia-based powder and increasing the content of the white zirconia-based powder corresponding to the content of the colored zirconia-based powder at a constant ratio.
- the raw material 1 disposed at the bottom of the mold 40 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 10: 0, and the raw material 2 disposed on the raw material 1 is colored zirconia-based powder.
- a white zirconia powder is mixed in a weight ratio of 9: 1, and the raw material 2 disposed above the raw material 2 is used a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 8: 2, the raw material 3
- the raw material 4 disposed in the upper portion is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 7: 3
- the raw material 4 disposed on the raw material 4 is colored zirconia-based powder and white zirconia powder 6: 4, which is mixed in a weight ratio of 4
- the raw material 6 disposed above the raw material 5 is colored zirconia-based powder and white zirconia powder in a weight ratio of 5: 5.
- a mixed material is used, and the raw material 7 disposed on the raw material 6 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 4: 6, and the raw material 8 disposed on the raw material 7 is colored zirconia-based.
- the powder and the white zirconia powder is used in a weight ratio of 3: 7, and the raw material 9 disposed above the raw material 8 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 2: 8.
- the raw material 10 disposed above the raw material 9 uses a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 1: 9.
- the Lee Jangjae may use water, but is not limited to water, and alcohol may also be used.
- the ratio of the raw material injected into the mold 40 and the release material is preferably used in the ratio of 30 to 50% by weight of the raw material, 50 to 70% by weight of the release material, the raw material of the mold 40 is gypsum May be used but is not necessarily limited to gypsum.
- the molding die 40 In the case where gypsum is used as the molding die 40, when a mixture of raw materials and a release material is injected into the molding die 40, the molding die 40 carries the powder suspended in water together with the transfer mold 40 of the molding die 40. At the surface, the pulled material is then diffused and absorbed into the gypsum, and a mixture layer of low moisture is formed on the surface of the mold 40. As time goes by, the mixture layer becomes harder, and as the settling time becomes longer, the mixture layer becomes thicker and has a desired shape.
- the molded result is demolded from the mold 40.
- Cold Isotropic Press is performed to maintain uniform density distribution in the demolded product.
- the cold hydrostatic pressure is preferably applied for 1 to 120 minutes at a pressure in the range of 10 to 200 MPa with respect to the compression molded product.
- a degreasing process for burning and removing the binder and the like from the molded product is performed.
- the degreasing process is preferably carried out for about 1 to 120 hours at a temperature of about 400 ⁇ 800 °C.
- the degreasing process is preferably performed in an oxidizing (oxygen (O 2 ) or air) atmosphere.
- the calcination process is preferably performed for 10 minutes to 48 hours at a calcination temperature of about 800 ⁇ 1100 °C. It is preferable to increase the temperature at a heating rate of 1 to 50 ° C./min until the calcination temperature. If the temperature rising rate is too slow, it takes a long time to decrease productivity, and if the temperature rising rate is too fast, thermal stress may be applied by a sudden temperature rise. Since it is possible to raise the temperature at a temperature rising rate in the above range, it is preferable.
- the calcination is preferably carried out in an oxidizing atmosphere (for example, oxygen (O 2 ) or air atmosphere).
- an oxidizing atmosphere for example, oxygen (O 2 ) or air atmosphere.
- the furnace temperature is lowered to unload the calcined product.
- the furnace cooling may be allowed to cool down in a natural state by turning off the furnace power source, or to set a temperature drop rate (eg, 10 ° C./min) arbitrarily. It is desirable to keep the pressure inside the furnace constant while the furnace temperature is lowered.
- the binder remaining in the calcination process is burned and removed.
- the calcined result is loaded into a milling machine such as a computerized numerical controller (CNC) and processed according to the desired zirconia block geometry.
- CNC computerized numerical controller
- a computer-aided design (CAD) / computer-aided manufacturing (CAM) process may be used for the processing.
- the finished product is washed thoroughly and dried.
- the drying is preferably performed for 10 minutes to 24 hours at a temperature of about room temperature to 150 °C.
- a white zirconia powder having a spherical shape and having an average particle diameter of about 0.2 ⁇ m was used as the white zirconia-based powder.
- An organic binder was added to the white zirconia-based powder to facilitate molding and mixed.
- the organic binder was mixed by 3 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- PVA205MB Japanese, Kuraray was used as the organic binder.
- the colored zirconia-based powder was a powder formed by calcination process by mixing a zirconia and *** metal oxide to give a color.
- An organic binder was added to the colored zirconia-based powder to facilitate molding and mixed.
- the organic binder was mixed by 3 parts by weight based on 100 parts by weight of the white zirconia-based powder.
- PVA205MB Japanese, Kuraray was used as the organic binder.
- the colored zirconia-based powders and the white zirconia-based powders were mixed with different mixing ratios to prepare ten raw materials in which weight ratios of the colored zirconia-based powders and the white zirconia-based powders were differently blended.
- raw materials 1 to 10 were prepared by mixing colored zirconia-based powders and white zirconia-based powders in different weight ratios.
- the plurality of raw materials were arranged so that the amount of the colored zirconia-based powder and the amount of the white zirconia-based powder had a sequential ratio.
- a compression molding mold is prepared to mold the zirconia-based powder, and the amount of the colored zirconia-based powder and the amount of the white zirconia-based powder are mixed in a ratio as shown in FIG. 1 and Table 1 to produce a desired color gradient. It was injected into the mold.
- the raw material 1 disposed at the bottom of the mold is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 10: 0, and the raw material 2 disposed on the raw material 1 is composed of colored zirconia-based powder and white zirconia powder 9
- a raw material mixed in a weight ratio of 1: 1 is used, and the raw material 3 disposed on the raw material 2 is a mixed raw material of color zirconia-based powder and white zirconia powder in a weight ratio of 8: 2.
- the raw material 4 disposed above the raw material 4 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 7: 3
- the raw material 5 disposed above the raw material 4 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 6: 4
- the raw material 6 disposed above the raw material 5 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 5: 5.
- the raw material 7 disposed on the raw material 6 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 4: 6, and the raw material 8 disposed on the raw material 7 is colored zirconia-based powder and white.
- the zirconia powder is mixed in a weight ratio of 3: 7, and the raw material 9 disposed on top of the raw material 8 is a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 2: 8.
- the raw material 10 disposed in the mixture was a mixture of colored zirconia-based powder and white zirconia powder in a weight ratio of 1: 9.
- the mold was compression molded using a press at a pressure of 2 tons.
- the cold hydrostatic process was performed to maintain uniform density distribution in the molded product.
- the cold hydrostatic pressure was applied for 10 minutes at a pressure in the range of 100 MPa to the compression molded product.
- a degreasing process for removing the binder and the like from the molded product was performed.
- the degreasing process was performed for 60 hours at a temperature of 600 °C.
- the furnace was charged and calcined to meet the hardness and density conditions suitable for machining.
- the calcination process was performed for about 4 hours at a calcination temperature of about 1000 °C. Up to the calcination temperature was raised at a temperature increase rate of 5 °C / min. The calcination was carried out in an air atmosphere. Cooling of the electric furnace was to cut off the power supply to cool in a natural state.
- FIG 3 shows a zirconia block having a color gradient prepared according to the experimental example.
- the zirconia block manufactured according to the experimental example has a color gradient and has a shape in which colors change sequentially from the bottom to the top.
- the manufacturing method of the zirconia block having a color gradient of the present invention by implementing the color gradient of the natural teeth in the zirconia block itself, it is possible to express the aesthetics of natural teeth without using ceramic or liquid color set, industrial There is availability.
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Abstract
Description
원료명 | 유색 지르코니아계 분말 중량비율 | 백색 지르코니아계 분말 중량비율 |
원료1 | 10 | 0 |
원료2 | 9 | 1 |
원료3 | 8 | 2 |
원료4 | 7 | 3 |
원료5 | 6 | 4 |
원료6 | 5 | 5 |
원료7 | 4 | 6 |
원료8 | 3 | 7 |
원료9 | 2 | 8 |
원료10 | 1 | 9 |
Claims (18)
- (a) 유색 지르코니아계 분말과 백색 지르코니아계 분말을 준비하는 단계;(b) 원하는 색상 구배를 내기 위해서 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말을 배합비를 달리하면서 혼합하여 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말이 서로 다른 중량비로 배합된 복수 개의 원료를 준비하는 단계;(c) 상기 유색 지르코니아계 분말의 함량이 많은 원료의 순서대로 또는 상기 유색 지르코니아계 분말의 함량이 적은 원료의 순서대로 상기 복수 개의 원료를 순차적으로 압축성형용 몰드에 주입하는 단계;(d) 상기 복수 개의 원료가 주입된 상기 압축성형용 몰드에 압력을 인가하여 성형하는 단계; 및(e) 성형된 결과물을 하소하는 단계를 포함하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 하소하는 단계 전에,성형된 결과물에 대하여 내부의 균일한 밀도 분포를 유지하기 위하여 냉간정수압 공정을 수행하는 단계를 더 포함하며,냉간정수압은 성형된 결과물에 대하여 10∼200MPa 범위의 압력으로 인가되게 하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 유색 지르코니아계 분말은 유기물 바인더와 혼합되어 있고 상기 유기물 바인더는 상기 유색 지르코니아계 분말 100중량부에 대하여 0.1∼7중량부 혼합되어 있으며,상기 백색 지르코니아계 분말은 유기물 바인더와 혼합되어 있고 상기 유기물 바인더는 상기 백색 지르코니아계 분말 100중량부에 대하여 0.1∼7중량부 혼합되어 있는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 복수 개의 원료를 준비하기 위하여 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말을 혼합할 때 유기물 바인더도 함께 혼합하고,상기 유기물 바인더는 각각의 원료 100중량부에 대하여 0.1∼7중량부 혼합하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 하소하는 단계 전에,성형된 결과물에서 유기물 바인더를 제거하기 위한 탈지 공정을 수행하는 단계를 더 포함하며,상기 탈지 공정은 400∼800℃의 온도에서 수행하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 색상 구배를 내기 위해서 상기 복수 개의 원료는 유색 지르코니아계 분말과 백색 지르코니아계 분말의 배합비가 서로 다른 7∼20개의 원료로 이루어지고,성형된 결과물은 7∼20개의 원료가 순차적으로 쌓여 있는 구조를 이루는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서,상기 복수 개의 원료를 전체적으로 볼 때,상기 유색 지르코니아계 분말의 함량은 일정한 비율로 많아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량은 일정한 비율로 작아지거나, 상기 유색 지르코니아계 분말의 함량은 일정한 비율로 작아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량은 일정한 비율로 많아지며,상기 (c) 단계에서, 상기 복수 개의 원료는,상기 유색 지르코니아계 분말의 함량이 일정한 비율로 많아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량이 일정한 비율로 작아지는 순서에 따라 순차적으로 주입되거나, 상기 유색 지르코니아계 분말의 함량이 일정한 비율로 작아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량이 일정한 비율로 많아지는 순서에 따라 순차적으로 주입되는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 유색 지르코니아계 분말은 지르코니아 분말과 색상을 띠게 하기 위한 금속산화물이 혼합되어 소성 과정을 거쳐 형성된 분말이고,상기 금속산화물은 적색 산화철(Fe2O3), 황색 산화철(Fe2O3), MoO3, MnO2, CeO2, BaO, V2O5, V2O3 및 CoO 중에서 선택된 1종 이상의 물질로 이루어진 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제1항에 있어서, 상기 하소는 산화 분위기에서 800∼1100℃의 온도에서 수행하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- (a) 유색 지르코니아계 분말과 백색 지르코니아계 분말을 준비하는 단계;(b) 원하는 색상 구배를 내기 위해서 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말을 배합비를 달리하면서 혼합하여 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말이 서로 다른 중량비로 배합된 복수 개의 원료를 준비하는 단계;(c) 상기 유색 지르코니아계 분말의 함량이 많은 원료의 순서대로 또는 상기 유색 지르코니아계 분말의 함량이 적은 원료의 순서대로 상기 복수 개의 원료를 순차적으로 성형틀에 이장재와 함께 주입하여 성형하는 단계;(d) 성형된 결과물을 성형틀로부터 탈형하는 단계; 및(e) 탈형된 성형 결과물을 하소하는 단계를 포함하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 하소하는 단계 전에,성형된 결과물에 대하여 내부의 균일한 밀도 분포를 유지하기 위하여 냉간정수압 공정을 수행하는 단계를 더 포함하며,냉간정수압은 성형된 결과물에 대하여 10∼200MPa 범위의 압력으로 인가되게 하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 유색 지르코니아계 분말은 유기물 바인더와 혼합되어 있고 상기 유기물 바인더는 상기 유색 지르코니아계 분말 100중량부에 대하여 0.1∼7중량부 혼합되어 있으며,상기 백색 지르코니아계 분말은 유기물 바인더와 혼합되어 있고 상기 유기물 바인더는 상기 백색 지르코니아계 분말 100중량부에 대하여 0.1∼7중량부 혼합되어 있는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 복수 개의 원료를 준비하기 위하여 상기 유색 지르코니아계 분말과 상기 백색 지르코니아계 분말을 혼합할 때 유기물 바인더도 함께 혼합하고,상기 유기물 바인더는 각각의 원료 100중량부에 대하여 0.1∼7중량부 혼합하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 하소하는 단계 전에,성형된 결과물에서 유기물 바인더를 제거하기 위한 탈지 공정을 수행하는 단계를 더 포함하며,상기 탈지 공정은 400∼800℃의 온도에서 수행하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 색상 구배를 내기 위해서 상기 복수 개의 원료는 유색 지르코니아계 분말과 백색 지르코니아계 분말의 배합비가 서로 다른 7∼20개의 원료로 이루어지고,성형된 결과물은 7∼20개의 원료가 순차적으로 쌓여 있는 구조를 이루는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서,상기 복수 개의 원료를 전체적으로 볼 때,상기 유색 지르코니아계 분말의 함량은 일정한 비율로 많아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량은 일정한 비율로 작아지거나, 상기 유색 지르코니아계 분말의 함량은 일정한 비율로 작아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량은 일정한 비율로 많아지며,상기 (c) 단계에서, 상기 복수 개의 원료는,상기 유색 지르코니아계 분말의 함량이 일정한 비율로 많아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량이 일정한 비율로 작아지는 순서에 따라 순차적으로 주입되거나, 상기 유색 지르코니아계 분말의 함량이 일정한 비율로 작아지고 상기 유색 지르코니아계 분말의 함량에 대응하는 상기 백색 지르코니아계 분말의 함량이 일정한 비율로 많아지는 순서에 따라 순차적으로 주입되는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 유색 지르코니아계 분말은 지르코니아 분말과 색상을 띠게 하기 위한 금속산화물이 혼합되어 소성 과정을 거쳐 형성된 분말이고,상기 금속산화물은 적색 산화철(Fe2O3), 황색 산화철(Fe2O3), MoO3, MnO2, CeO2, BaO, V2O5, V2O3 및 CoO 중에서 선택된 1종 이상의 물질로 이루어진 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
- 제10항에 있어서, 상기 하소는 산화 분위기에서 800∼1100℃의 온도에서 수행하는 것을 특징으로 하는 색상 구배를 갖는 인공치아용 지르코니아 블록의 제조방법.
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EP13870381.4A EP2965713A4 (en) | 2013-03-05 | 2013-07-19 | METHOD FOR PRODUCING A CIRCON OXYGEN BLOCK FOR ARTIFICIAL TEETH WITH COLOR STUDIES |
JP2015531843A JP2015531646A (ja) | 2013-03-05 | 2013-07-19 | 色相勾配を有する人工歯牙用ジルコニアブロックの製造方法 |
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WO2017114776A1 (en) * | 2015-12-28 | 2017-07-06 | Dentsply Sirona Inc. | Method for producing a blank, blank and dental restoration |
KR20180099779A (ko) * | 2015-12-28 | 2018-09-05 | 덴츠플라이 시로나 인코포레이티드 | 블랭크의 제조 방법, 블랭크 및 치아 수복재 |
EP3517072A1 (en) * | 2015-12-28 | 2019-07-31 | DENTSPLY SIRONA Inc. | Blank and dental restoration |
US10485640B2 (en) | 2015-12-28 | 2019-11-26 | Dentsply Sirona Inc. | Method for producing a blank, blank and a dental restoration |
AU2016383553B2 (en) * | 2015-12-28 | 2019-11-28 | Degudent Gmbh | Method for producing a blank, blank and dental restoration |
AU2019275522B2 (en) * | 2015-12-28 | 2020-02-27 | Degudent Gmbh | Blank and dental restoration |
KR102115721B1 (ko) | 2015-12-28 | 2020-05-29 | 덴츠플라이 시로나 인코포레이티드 | 블랭크의 제조 방법, 블랭크 및 치아 수복재 |
Also Published As
Publication number | Publication date |
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US20160000538A1 (en) | 2016-01-07 |
KR101276616B1 (ko) | 2013-06-19 |
EP2965713A1 (en) | 2016-01-13 |
EP2965713A4 (en) | 2016-10-26 |
JP2015531646A (ja) | 2015-11-05 |
US9687325B2 (en) | 2017-06-27 |
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