CN115721565A - Tooth veneer cutting porcelain, preparation method thereof and tooth veneer - Google Patents
Tooth veneer cutting porcelain, preparation method thereof and tooth veneer Download PDFInfo
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- CN115721565A CN115721565A CN202211551237.XA CN202211551237A CN115721565A CN 115721565 A CN115721565 A CN 115721565A CN 202211551237 A CN202211551237 A CN 202211551237A CN 115721565 A CN115721565 A CN 115721565A
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- 229910052573 porcelain Inorganic materials 0.000 title claims abstract description 64
- 238000005520 cutting process Methods 0.000 title claims abstract description 61
- 238000002360 preparation method Methods 0.000 title abstract description 10
- PAZHGORSDKKUPI-UHFFFAOYSA-N lithium metasilicate Chemical compound [Li+].[Li+].[O-][Si]([O-])=O PAZHGORSDKKUPI-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052912 lithium silicate Inorganic materials 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 229910018068 Li 2 O Inorganic materials 0.000 claims abstract description 18
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 239000011521 glass Substances 0.000 claims abstract description 10
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 10
- 239000006121 base glass Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000006017 silicate glass-ceramic Substances 0.000 description 2
- 229910001260 Pt alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001055 chewing effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000011960 computer-aided design Methods 0.000 description 1
- 239000005548 dental material Substances 0.000 description 1
- WVMPCBWWBLZKPD-UHFFFAOYSA-N dilithium oxido-[oxido(oxo)silyl]oxy-oxosilane Chemical compound [Li+].[Li+].[O-][Si](=O)O[Si]([O-])=O WVMPCBWWBLZKPD-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The application discloses a tooth veneer cutting porcelain, a preparation method thereof and a tooth veneer, and solves the problem that the tooth veneer needs to be subjected to heat treatment to realize color conversion after cutting is completed. The tooth facing cutting porcelain is glass ceramic and only contains a lithium silicate crystal phase, and the basic glass comprises the following components in percentage by weight: siO 2 2 ，65％～75％；Li 2 O、15％～20％；K 2 O，1％～8％；Al 2 O 3 ，3％～8％；P 2 O 5 1% -5%; niO, 0.01-1%; the sum of the weight percentages of all the components in the tooth veneering cutting porcelain is 100 percent; wherein, the Li 2 O and K 2 O is eachUsing raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 With the raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of (1); the tooth facing cuts the L of porcelain * The value is 77 to 93,a * The value is-1 to 8,b * The value is 7 to 27.
Description
Technical Field
The application relates to the technical field of medical dental materials, in particular to a tooth veneering cutting porcelain and a preparation method thereof and a tooth veneering.
Background
When the surface of a natural tooth of a person is damaged or the surface color needs to be restored, a dentist usually makes a dental veneer for the patient, namely, a thin layer is cut off from the surface of the natural tooth, and then the dental veneer is made and stuck on a target position, wherein the dental veneer is a common restoration in dental clinical restoration. At present, the tooth veneers are mainly manufactured in three ways: the first is that the porcelain powder is piled up to mould manually to make the tooth overlay, the failure rate of the purely manual making method is very high; secondly, the tooth veneers are manufactured by hot-press casting of the glass ceramics, the success rate of the manufacturing method of the hot-press process is high, and the process belongs to a semi-automatic process; the third is that the glass ceramic is cut by computer aided design and processing (CAD/CAM) to manufacture the tooth veneers, and the manufacturing method of the cutting process has high success rate and is a full-automatic process. With the popularization of chair-side restoration technology, more and more hospitals, clinics and technicians select a CAD/CAM cutting process to manufacture the tooth veneers.
The material used for CAD/CAM cutting process at present is lithium silicate glass ceramic, and the manufacturing method is as follows: firstly, the lithium silicate glass ceramic is cut into tooth veneers by CAD/CAM equipment, and secondly, the lithium silicate tooth veneers are subjected to primary crystal phase conversion by heat treatment to be converted into lithium disilicate tooth veneers so as to improve the strength and the toughness. The existing goods adopting the process can be changed from bluish purple to light yellow in the heat treatment process so as to realize the restoration of the natural tooth color.
Disclosure of Invention
The application aims to provide a tooth veneer cutting porcelain, a preparation method thereof and a tooth veneer.
In a first aspect, the present application provides a dental veneer cutting ceramic, which is a glass ceramic containing only a crystalline phase of lithium silicate, and whose base glass is composed of the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of (1); the tooth facing cuts the L of porcelain * The value is 77 to 93,a * The value is-1 to 8,b * The value is 7 to 27.
The tooth facing does not need to take on the function of chewing, so the requirements on mechanical properties are not high, and only the requirements in ISO 6872 need to be met (strength not less than 50 MPa). The strength of the tooth veneer cutting porcelain can reach 170MPa, and the requirement of the tooth veneer on the mechanical property is completely met. If the tooth veneer cutting porcelain is directly used after being cut into the tooth veneer, the manufacturing efficiency of the tooth veneer can be improved, and the time of heat treatment is saved. However, the current commercial glass ceramic is bluish purple and cannot be directly used after being cut. Through a large number of experiments, the invention discovers that if the colorant in the glass is adjusted to NiO, the tooth veneer cutting porcelain presents a red-yellow system which is the color of natural teeth, and the tooth veneer cutting porcelain can be directly used after being cut.
In a possible implementation mode, the base glass of the tooth veneering cutting porcelain comprises the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 With the raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of a tooth facing cutting the L of porcelain * A value of 79 to 93,a * The value is 0 to 8,b * The value is between 9 and 27.
In a possible implementation mode, the base glass of the tooth veneering cutting porcelain comprises the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of a tooth facing cutting the L of porcelain * The value is between 81 and 93,a * The value is 1 to 8,b * The value is 11 to 27.
In a second aspect, the present application provides a dental veneer, prepared using the above dental veneer cutting porcelain.
In a third aspect, the present application provides a method for preparing a dental veneer cutting porcelain according to any one of the first aspect, the method comprising the steps of:
mixing SiO 2 、Li 2 CO 3 、K 2 CO 3 、Al 2 O 3 、(NH 4 ) 2 HPO 4 Mixing the NiO and the mixture according to the weight percentage, and ball-milling and drying the mixture;
melting the product obtained after drying, and then casting to obtain the basic glass block;
carrying out heat treatment on the base glass to obtain the tooth facing cutting porcelain; wherein the tooth facing cutting porcelain contains only a lithium silicate crystal phase, and L of the tooth facing cutting porcelain * The value is 77 to 93,a * The value is-1 to 8,b * The value is 7-27, and the base glass comprises the following components in percentage by weight: siO 2 2 65％～75％，Li 2 O 15％～20％，K 2 O 1％～8％，Al 2 O 3 3％～8％，P 2 O 5 1％～5％，NiO0.01～1％。
In a possible implementation, the mixture is ball-milled for a period of time ranging from 1 minute to 60 minutes.
In a possible implementation mode, the temperature for melting the product obtained after drying is 1400-1500 ℃, and the time for melting is 1-5 hours.
In a possible implementation, the temperature for heat treatment of the base glass is 550 ℃ to 750 ℃.
In the embodiment, in the preparation process of the tooth veneer cutting porcelain, siO is added 2 And Li 2 O in order to precipitate lithium silicate crystals (Li) 2 SiO 3 ) Adding K 2 O and Al 2 O 3 For the purpose of controlling the content of lithium silicate crystals, P 2 O 5 The addition of (2) is for controlling the size of lithium silicate crystal, and the addition of NiO is for obtaining a yellowish red color of natural tooth.
Compared with the prior art, the tooth veneer cutting porcelain provided by the application has the following beneficial effects: a large number of tests show that the tooth veneering cutting porcelain has a yellow-red color system by adding NiO, so that the color of natural teeth can be obtained without heat treatment, and the procedure for manufacturing the tooth veneering is reduced.
Drawings
Fig. 1 is an SEM image of a tooth facing cutting porcelain provided in an example of the present application;
fig. 2 is an XRD pattern of the tooth veneer cut porcelain obtained in the example of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The tooth veneer cutting porcelain consists of lithium silicate crystals and a glass matrix phase, the bending strength of the tooth veneer cutting porcelain can reach 170MPa generally, and the requirement of the tooth veneer on mechanical properties is completely met. Because the NiO is added, the tooth veneering cutting porcelain has yellowish red color, the color conversion is realized without heat treatment, the time for processing the tooth veneers is greatly saved, and the efficiency is improved, so the method has remarkable significance.
The detailed description is as follows:
the application provides a tooth facing cutting porcelain, tooth facing cutting porcelain is glass ceramic, only contains lithium silicate crystalline phase, and its basic glass comprises following component by weight percent:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of (1);
the embodiment of the application provides a tooth veneer cutting porcelain, siO 2 The content of (b) is 65% to 75% by weight, and may be, for example, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%, 74%, 75%, or the like. Li 2 The O content is 15 to 20% by weight, and may be, for example, 15%, 16%, 17%, 18%, 19%, 20%, or the like. K 2 The O content is 1 to 8% by weight, and may be, for example, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, or the like. Al (Al) 2 O 3 The content of (b) is 3% to 8% by weight, and may be, for example, 3%, 4%, 5%, 6%, 7%, 8%, or the like. P 2 O 5 The content of (b) is 1% to 5% by weight, and may be, for example, 1%, 2%, 3%, 4%, 5%, or the like. The NiO content may be 0.01 to 1% by weight, for example, 0.01%, 0.03%, 0.05%, 0.07%, or 1%. It should be noted that, in the embodiments of the present application, the weight percentage may be divided into finer proportions, which are not described herein again.
The following preferred technical solutions are preferred but not limiting the technical solutions provided by the present application, and the technical objects and advantages of the present application can be better achieved and realized by the following preferred technical solutions.
As one of the preferable technical schemes of the tooth veneering cutting porcelain, the base glass of the tooth veneering cutting porcelain comprises the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of (1);
as a second preferred technical scheme of the tooth facing cutting porcelain, the base glass of the tooth facing cutting porcelain comprises the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of (1);
the technical solution of the present application is further described by the following embodiments in combination with table 1 and the accompanying drawings.
Base glasses prepared in examples 1 to 3 from SiO 2 、Li 2 O、K 2 O、Al 2 O 3 、P 2 O 5 And NiOThe components are mixed, and the sum of the mass percent of the components is 100 percent. The technical effects that the glass ceramic contains lithium silicate crystals and has a yellowish red color are achieved through the coordinated matching of the components. Wherein, siO 2 And Li 2 O is added to precipitate lithium silicate crystals (Li) 2 SiO 3 ) And K is 2 O and Al 2 O 3 Is added to control the content of lithium silicate crystals, P 2 O 5 The addition of (3) is for controlling the size of lithium silicate crystals, and the addition of NiO is for making the glass ceramic have a yellowish red hue.
In the embodiment of the application, the sum of the mass percentages of the components is 100%, the yellow-red color of natural teeth is required to be presented, and the technical effect of only containing the lithium silicate crystal phase is required, so that the components are in a mutual restriction and adjustment relationship. In order to obtain the technical effects of only precipitating the crystalline phase of lithium silicate and presenting a yellowish red hue, siO 2 、Li 2 O、K 2 O、Al 2 O 3 And the content of the NiO five components are strictly controlled to achieve the proper color and the technical effect of only containing the lithium silicate crystal phase as described in the examples of the application.
In the specific preparation process, analytically pure SiO is respectively weighed according to the weight percentage of each component of the glass in each example listed in Table 1 2 、Li 2 CO 3 、K 2 CO 3 、Al 2 O 3 、(NH 4 ) 2 HPO 4 And NiO, fully mixing and grinding by using a planetary ball mill, and taking out and drying; placing the powder obtained after drying in a platinum alloy crucible, placing in a box-type resistance furnace, heating to 1400-1500 ℃ in air atmosphere, and melting at constant temperature for 1-5 h; then pouring the melt into a mould at 1400-1500 ℃ to cast to obtain a base glass block. And then the basic glass block is subjected to heat treatment to be converted into tooth facing cutting porcelain.
FIG. 2 is an XRD pattern of the dental veneer cut ceramic obtained in example 1, from which it can be seen that the glass ceramic contains only a lithium silicate crystal phase.
The cut surface ceramics prepared in examples 1 to 3 exhibited a yellowish red hue of natural teeth.
The tooth veneering cut porcelain obtained in each example was tested, and the results were as follows:
l of dental veneering cut porcelain prepared in example 1 * ＝91.4925，a * ＝0.615，b * =8.0189. L of dental veneered cutting porcelain prepared in example 2 * ＝84.6599，a * ＝2.6467，b * =20.0285. L of dental veneering cut porcelain prepared in example 3 * ＝78.6114，a * ＝6.629，b * ＝25.8924。
Comparative example 1
The contents of the components and the preparation method and conditions were the same as in example 1 except that the content of NiO was 0.
L of dental veneered cutting porcelain prepared in this comparative example 1 * ＝92.5326，a * ＝0.4328，b * =2.3642, not in the range of the yellowish red phase of natural teeth.
Comparative example 2
The contents of the components and the preparation method and conditions were the same as in example 3 except that the content of NiO was 1.1.
L of dental veneered cutting porcelain prepared in this comparative example 1 * ＝69.3256，a * ＝6.2351，b * =24.6895, lightness too low to be in the range of lightness of natural teeth.
TABLE 1 basic glass composition table (weight percent content)
As can be seen from examples 1 to 3, the tooth veneering cut porcelain prepared according to the composition provided by the present application is due to the control of SiO 2 、Li 2 O、K 2 O and Al 2 O 3 And P 2 O 5 The matching relation between the NiO and the proper content of the NiO ensure that the prepared tooth veneering cutting porcelain has L * At 77 to 93,a * In the range of-1 to 8,b * At a value of 7 to 27.
The application provides a tooth veneer, tooth veneer adopts as above tooth veneer cutting porcelain preparation.
While particular embodiments have been illustrated and described, it will be appreciated that the above embodiments are merely illustrative of the technical solutions of the present application and are not limiting; those of ordinary skill in the art will understand that: modifications may be made to the above-described embodiments, or equivalents may be substituted for some or all of the features thereof without departing from the spirit and scope of the present application; the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present application; it is therefore intended to cover in the appended claims all such alternatives and modifications that are within the scope of this application.
Claims (8)
1. The tooth facing cutting porcelain is characterized by being glass ceramic only containing a lithium silicate crystal phase, and the basic glass comprises the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of a tooth facing cutting the L of porcelain * The value is 77 to 93,a * The value is-1 to 8,b * The value is 7 to 27.
2. The dental veneer cutting porcelain according to claim 1, wherein a base glass of the dental veneer cutting porcelain is composed of the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of a tooth facing cutting the L of porcelain * A value of 79 to 93,a * The value is 0 to 8,b * The value is between 9 and 27.
3. The dental veneer cutting porcelain according to claim 2, wherein a base glass of the dental veneer cutting porcelain is composed of the following components in percentage by weight:
the sum of the weight percentages of the components in the base glass is 100%; wherein, the Li 2 O and K 2 O is respectively taken as raw material Li 2 CO 3 And K 2 CO 3 Is introduced in the form of P 2 O 5 From raw material (NH) 4 ) 2 HPO 4 Is introduced in the form of a tooth facing cutting the L of porcelain * The value is between 81 and 93,a * The value is 1 to 8,b * The value is 11 to 27.
4. A dental veneer characterized by being cut using the dental veneer cutting porcelain according to any one of claims 1 to 3.
5. A method for producing a dental veneer cutting porcelain according to any one of claims 1 to 3, comprising the steps of:
mixing SiO 2 、Li 2 CO 3 、K 2 CO 3 、Al 2 O 3 、(NH 4 ) 2 HPO 4 Mixing the NiO and the mixture according to the weight percentage, and ball-milling and drying the mixture;
melting the product obtained after drying, and then performing water quenching to obtain the base glass;
carrying out heat treatment on the base glass to obtain the tooth facing cutting porcelain; wherein the tooth facing cutting porcelain contains only a lithium silicate crystal phase, and L of the tooth facing cutting porcelain * The value is 77 to 93,a * The value is-1 to 8,b * The value is 7-27, and the base glass comprises the following components in percentage by weight: siO 2 2 65％～75％，Li 2 O 15％～20％，K 2 O 1％～8％，Al 2 O 3 3％～8％，P 2 O 5 1％～5％，NiO0.01～1％。
6. The method for preparing a dental veneer cutting porcelain according to claim 5, wherein the time period for ball-milling the mixture is 1 to 60 minutes.
7. The method for preparing a dental veneer cutting porcelain according to claim 5, wherein the temperature at which the product obtained after baking is melted is 1400 ℃ to 1500 ℃ and the time period of the melting is 1 hour to 5 hours.
8. The method for producing a dental veneer cutting porcelain according to claim 5, wherein the temperature at which the base glass is heat-treated is 550 to 750 ℃.
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| US20120241991A1 (en) * | 2010-04-16 | 2012-09-27 | Ivoclar Vivadent Ag | Process for the Preparation of Dental Restorations |
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Application publication date: 20230303 |