CN115624494A - Preparation method of dental phosphate embedding material, embedding material and application - Google Patents
Preparation method of dental phosphate embedding material, embedding material and application Download PDFInfo
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- CN115624494A CN115624494A CN202211095439.8A CN202211095439A CN115624494A CN 115624494 A CN115624494 A CN 115624494A CN 202211095439 A CN202211095439 A CN 202211095439A CN 115624494 A CN115624494 A CN 115624494A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/833—Glass-ceramic composites
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K6/00—Preparations for dentistry
- A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
- A61K6/838—Phosphorus compounds, e.g. apatite
Abstract
A preparation method of a dental phosphate embedding material, an embedding material and application thereof, in particular to a preparation method of a phosphate series embedding material and a matched embedding liquid. The embedding material is prepared by respectively grinding 30-50 parts of quartz, 20-40 parts of cristobalite, 10-40 parts of alumina, 10-30 parts of mullite, 4-9 parts of magnesium oxide, 5-12 parts of ammonium dihydrogen phosphate, 4-8 parts of magnesium dihydrogen phosphate, 1-5 parts of magnesium ammonium phosphate hexahydrate and the like to a certain fineness and uniformly mixing. The embedding liquid consists of 80-90 parts of water, 2-6 parts of boric acid, 4-16 parts of silica sol and the like. Mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.11-0.25, and uniformly stirring in a vacuum stirrer to obtain the dental casting mold. The phosphate embedding material has good fluidity, can be fully wetted with wax patterns, has a thermal expansion coefficient matched with hot-die-cast glass ceramics, has good exhaust effect, can avoid cracking in the die-casting process, has finer and finer integral granularity, and saves the grinding and polishing time of the restoration after die-casting. The strength not only meets the die-casting requirement, but also can easily remove the embedded material after die-casting.
Description
Technical Field
The invention relates to the field of precision casting embedding materials for oral clinical restoration, in particular to a preparation method of dental phosphate, an embedding material and application.
Background
The glass ceramic is widely accepted by doctors and patients as a dental restoration material, particularly the lithium disilicate glass ceramic has unique advantages in the field of dental restoration due to strength and aesthetic effects, particularly the ultrathin veneering can achieve better restoration effect by adopting a minimally invasive mode, and the glass ceramic becomes a dental restoration mode favored by young people. The cutting lithium disilicate glass ceramic has high requirement on machining equipment, so that it is impossible to machine ultrathin veneers, inlays and crowns with high precision or has high machining cost. The hot-press casting lithium disilicate glass ceramic has low requirement on equipment, can realize complex restoration shapes and has certain advantages. The lithium disilicate glass ceramic is die-cast by a lost wax method, the embedding material is indispensable, and the performance of the embedding material directly influences the performance of the final glass ceramic restoration. At present, the phosphate embedding material for dentistry in China mainly depends on import and is expensive, so that the development of a high-performance embedding material has very important significance.
Chinese patent CN107115204A discloses a phosphate embedding material and a forming method thereof, and raw material components of the phosphate embedding material comprise magnesium aluminate spinel, silicon carbide crystal whiskers, magnesium oxide, ammonium dihydrogen phosphate, tricalcium silicate and explosion-proof fibers. CN201310425761.7 discloses a dental cast titanium embedding material, which comprises magnesium oxide, aluminum oxide, zirconium oxide, yttrium oxide additive, binding agent and the like. The invention invents an embedding material and a matched embedding solution with lower cost, good fluidity, controllable thermal expansion coefficient, good exhaust effect and high strength on the basis of the prior art.
Disclosure of Invention
The invention aims to provide a preparation method of an embedding material which has lower cost, good fluidity, good exhaust effect and high strength, and the thermal expansion coefficient of the embedding material is matched with that of lithium disilicate glass ceramics.
In order to achieve the purpose, the invention is implemented according to the following technical scheme:
a preparation method of a dental phosphate embedding material comprises the following steps:
preparation of investment Material
Respectively grinding and uniformly mixing 30-50 parts of quartz, 20-40 parts of cristobalite, 10-40 parts of alumina, 10-30 parts of mullite, 4-9 parts of magnesium oxide, 5-12 parts of ammonium dihydrogen phosphate, 4-8 parts of magnesium dihydrogen phosphate and 1-5 parts of magnesium ammonium phosphate hexahydrate by mass to prepare an embedding material;
preparation of embedding solution
Uniformly mixing 80-90 parts of water, 2-6 parts of boric acid and 4-16 parts of silica sol by mass to prepare an embedding solution;
mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.11-0.25, and uniformly stirring in a vacuum stirrer to obtain the embedding material.
Preferably: the quartz and the cristobalite are ground to 100-250 mu m, the alumina and the mullite are ground to 30-80 mu m, and the magnesium oxide, the ammonium dihydrogen phosphate, the magnesium dihydrogen phosphate and the magnesium ammonium phosphate hexahydrate are ground to less than 50 mu m.
Preferably: the uniform mixing is carried out in a mixer for 30 minutes.
Preferably: the vacuum stirring time is about 60s-90s, and the vacuum degree is less than 0.1MPa.
The second purpose of the invention is to provide the embedding material prepared by the preparation method of the dental phosphate embedding material.
Preferably: the embedding material comprises 30-50 parts of quartz, 20-40 parts of cristobalite, 10-40 parts of alumina, 10-30 parts of mullite, 4-9 parts of magnesium oxide, 5-12 parts of ammonium dihydrogen phosphate, 4-8 parts of magnesium dihydrogen phosphate and 1-5 parts of magnesium ammonium phosphate hexahydrate.
Preferably: the embedding liquid comprises 80-90 parts of water, 2-6 parts of boric acid and 4-16 parts of silica sol.
The invention also aims to provide application of the embedding material prepared by the preparation method of the dental phosphate embedding material in a dental casting mould.
Preferably: the application method is that the embedding material and the embedding liquid are embedded and solidified for 20-40min after being stirred, and the embedding material and the embedding liquid are demoulded and are placed into a muffle furnace to be cast at 850-900 ℃ for 30-60 min.
Preferably: the mass ratio of the embedding liquid to the embedding material is 0.11-0.25.
Preferably: the application is for the "lost wax" die casting of lithium disilicate glass ceramics.
Compared with the prior art, the invention has the following beneficial effects:
the thermal expansion coefficient matching agent has good fluidity, can be fully wetted with wax patterns, avoids incomplete die casting caused by surface bubbles, has a thermal expansion coefficient matched with thermal compression casting glass ceramics, and avoids the phenomenon of embedded ring cracking caused by expansion coefficient mismatch in the thermal compression casting process. The reaction of high temperature and glass ceramic is reduced from the aspect of component design, the surface of the die-cast restoration body is ensured to have almost no reaction layer, meanwhile, the integral granularity is finer, the surface roughness of the die-cast restoration body is ensured to be relatively lower, and the grinding and polishing time of the die-cast restoration body is saved. The compression strength not only meets the die-casting requirement, but also can easily remove the embedded material after die-casting.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. The specific embodiments described herein are merely illustrative of the invention and do not limit the invention. The embedding material, the matched embedding liquid and the using method in the embodiment are selected, and the flowability, the setting time, the compressive strength, the setting expansion rate and the thermal expansion rate of the embedding material and the refractory substitute material are tested by referring to YY/T0436-2011 dentistry casting embedding material and refractory substitute material.
Example 1
Respectively grinding 30 parts of quartz, 20 parts of cristobalite, 15 parts of alumina, 13 parts of mullite, 8 parts of magnesium oxide, 8 parts of ammonium dihydrogen phosphate, 4 parts of magnesium dihydrogen phosphate, 2 parts of magnesium ammonium phosphate hexahydrate and the like, and uniformly mixing to prepare the embedding material. 85 parts of water, 2 parts of boric acid and 13 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.16 for 15s, stirring in a vacuum stirrer for 60s, injecting into a mold, curing for 30min, demolding, placing into a muffle furnace, and keeping the temperature at 850 ℃ for 40min.
Example 2
Respectively grinding 50 parts of quartz, 10 parts of cristobalite, 5 parts of alumina, 15 parts of mullite, 7 parts of magnesium oxide, 6 parts of ammonium dihydrogen phosphate, 3 parts of magnesium dihydrogen phosphate, 4 parts of magnesium ammonium phosphate hexahydrate and the like, and uniformly mixing to prepare the embedding material. 90 parts of water, 2 parts of boric acid and 8 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.20 for 15s, stirring in a vacuum stirrer for 60s, injecting into a mold, curing for 40min, demolding, placing into a muffle furnace, and keeping the temperature at 850 ℃ for 60min.
Example 3
40 parts of quartz, 10 parts of cristobalite, 15 parts of alumina, 18 parts of mullite, 7 parts of magnesium oxide, 4 parts of ammonium dihydrogen phosphate, 2 parts of magnesium dihydrogen phosphate, 4 parts of magnesium ammonium phosphate hexahydrate and the like are respectively ground and uniformly mixed to prepare the embedding material. 86 parts of water, 2 parts of boric acid and 12 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.25 for 15s, stirring in a vacuum stirrer for 45s, injecting into a mold, curing for 20min, demolding, placing into a muffle furnace, and keeping the temperature at 880 ℃ for 30min.
Example 4
Respectively grinding and uniformly mixing 25 parts of quartz, 20 parts of cristobalite, 20 parts of alumina, 15 parts of mullite, 6 parts of magnesium oxide, 5 parts of ammonium dihydrogen phosphate, 5 parts of magnesium dihydrogen phosphate, 4 parts of magnesium ammonium phosphate hexahydrate and the like to prepare the embedding material. 80 parts of water, 3 parts of boric acid and 17 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.13 for 15s, stirring in a vacuum stirrer for 60s, injecting into a mold, curing for 40min, demolding, placing into a muffle furnace, and keeping the temperature at 880 ℃ for 40min.
Example 5
Respectively grinding and uniformly mixing 25 parts of quartz, 20 parts of cristobalite, 15 parts of alumina, 23 parts of mullite, 5 parts of magnesium oxide, 8 parts of ammonium dihydrogen phosphate, 2 parts of magnesium ammonium phosphate hexahydrate and the like to prepare the embedding material. 88 parts of water, 4 parts of boric acid and 8 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.23 for 15s, stirring in a vacuum stirrer for 60s, injecting into a mold, curing for 50min, demolding, placing in a muffle furnace at 900 ℃, and preserving heat for 30min.
Example 6
Respectively grinding 24 parts of quartz, 30 parts of cristobalite, 10 parts of alumina, 20 parts of mullite, 4 parts of magnesium oxide, 6 parts of ammonium dihydrogen phosphate, 4 parts of magnesium dihydrogen phosphate, 2 parts of magnesium ammonium phosphate hexahydrate and the like, and uniformly mixing to prepare the embedding material. 90 parts of water, 2 parts of boric acid and 8 parts of silica sol are uniformly mixed to prepare the embedding solution. Manually mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.15 for 15s, stirring in a vacuum stirrer for 60s, injecting into a mold, curing for 40min, demolding, placing into a muffle furnace, and keeping the temperature at 900 ℃ for 40min.
TABLE 1 EXAMPLES 1-6 Properties of embedding materials
Claims (10)
1. The preparation method of the dental phosphate embedding material is characterized by comprising the following steps:
preparation of investment Material
Respectively grinding and uniformly mixing 30-50 parts of quartz, 20-40 parts of cristobalite, 10-40 parts of alumina, 10-30 parts of mullite, 4-9 parts of magnesium oxide, 5-12 parts of ammonium dihydrogen phosphate, 4-8 parts of magnesium dihydrogen phosphate and 1-5 parts of magnesium ammonium phosphate hexahydrate by mass to prepare an embedding material;
preparation of embedding solution
Uniformly mixing 80-90 parts of water, 2-6 parts of boric acid and 4-16 parts of silica sol by mass to prepare an embedding solution;
mixing the embedding material and the embedding liquid according to the liquid-solid ratio of 0.11-0.25, and uniformly stirring in a vacuum stirrer to obtain the embedding material.
2. The method for preparing a dental phosphate embedding material according to claim 1, wherein: the quartz and the cristobalite are ground to 100-250 mu m, the alumina and the mullite are ground to 30-80 mu m, and the magnesium oxide, the ammonium dihydrogen phosphate, the magnesium dihydrogen phosphate and the magnesium ammonium phosphate hexahydrate are ground to less than 50 mu m.
3. The method for preparing a dental phosphate embedding material according to claim 1, wherein: the uniform mixing is carried out in a mixer for 30 minutes.
4. The method for preparing a dental phosphate embedding material according to claim 1, wherein: the vacuum stirring time is about 60s-90s, and the vacuum degree is less than 0.1MPa.
5. An embedding material prepared by the method for preparing a dental phosphate embedding material according to any one of claims 1-4.
6. The embedding material prepared by the method for preparing a dental phosphate embedding material according to claim 5, wherein: the embedding material comprises 30-50 parts of quartz, 20-40 parts of cristobalite, 10-40 parts of alumina, 10-30 parts of mullite, 4-9 parts of magnesium oxide, 5-12 parts of ammonium dihydrogen phosphate, 4-8 parts of magnesium dihydrogen phosphate and 1-5 parts of magnesium ammonium phosphate hexahydrate.
7. The embedding material prepared by the method for preparing a dental phosphate embedding material according to claim 5, wherein: the embedding liquid comprises 80-90 parts of water, 2-6 parts of boric acid and 4-16 parts of silica sol.
8. Use of an embedding material prepared by a method for the preparation of a dental phosphate embedding material according to any of claims 5-7 in a dental cast.
9. Use of an embedding material prepared by a method for preparing a dental phosphate embedding material according to claim 8 in a dental cast mould, characterized in that: the application method is that the embedding material and the embedding liquid are embedded and solidified for 20-40min after being stirred, and then the mixture is demoulded and put into a muffle furnace to be cast at 850-900 ℃ for 30-60 min.
10. The method for preparing a dental phosphate embedding material according to claim 9, wherein: the mass ratio of the embedding material to the embedding liquid is 0.11-0.25.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022103358056 | 2022-03-31 | ||
| CN202210335805 | 2022-03-31 |
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| Publication Number | Publication Date |
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| CN115624494A true CN115624494A (en) | 2023-01-20 |
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| CN202211095439.8A Pending CN115624494A (en) | 2022-03-31 | 2022-09-06 | Preparation method of dental phosphate embedding material, embedding material and application |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003034608A (en) * | 2001-07-19 | 2003-02-07 | Shiyoufuu:Kk | Flash heating-type phosphate investment for dental use |
| CN105125413A (en) * | 2015-07-17 | 2015-12-09 | 南宁市美皓医疗器械有限公司 | Manufacturing method of minimally invasive molar glass porcelain laminate veneer |
| CN107115203A (en) * | 2017-04-28 | 2017-09-01 | 河南科技大学 | A kind of dentistry investment additive and preparation method |
-
2022
- 2022-09-06 CN CN202211095439.8A patent/CN115624494A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003034608A (en) * | 2001-07-19 | 2003-02-07 | Shiyoufuu:Kk | Flash heating-type phosphate investment for dental use |
| CN105125413A (en) * | 2015-07-17 | 2015-12-09 | 南宁市美皓医疗器械有限公司 | Manufacturing method of minimally invasive molar glass porcelain laminate veneer |
| CN107115203A (en) * | 2017-04-28 | 2017-09-01 | 河南科技大学 | A kind of dentistry investment additive and preparation method |
Non-Patent Citations (1)
| Title |
|---|
| 于海洋: "《现代牙科技师手册》", 科学技术文献出版社, pages: 1332 * |
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