CN111390500A - Preparation method of metal standard thickness sheet for internal quality evaluation of false tooth - Google Patents
Preparation method of metal standard thickness sheet for internal quality evaluation of false tooth Download PDFInfo
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- CN111390500A CN111390500A CN202010196889.0A CN202010196889A CN111390500A CN 111390500 A CN111390500 A CN 111390500A CN 202010196889 A CN202010196889 A CN 202010196889A CN 111390500 A CN111390500 A CN 111390500A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
The invention relates to the field of medical instruments, in particular to a preparation method of a metal standard thickness sheet for evaluating the internal quality of a denture, which comprises the following steps: s1, mosaic processing: carrying out mosaic processing on the metal body; s2, cutting: cutting the metal body after the embedding treatment to obtain a plurality of thickness sheets with the thickness of more than or equal to 0.2 mm; s3, packaging: the thickness sheet is packaged and fixed in the material which absorbs X-rays weakly, and the preparation method solves the problems of complex preparation process, long preparation time and high cost of the metal thickness sheet.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to a preparation method of a metal standard thickness sheet for evaluating the internal quality of a denture.
Background
The metal standard thickness sheet (thickness sheet for short) for the internal quality of the false tooth is used for quantitatively testing the thickness of the occlusal surface of the false tooth when the performance of the false tooth product is tested. At present, no standard thickness sheet corresponding to the denture alloy is produced, the most advanced technology is to prepare metal sheets with different sheet step thicknesses as step-shaped image quality meters by a casting method consistent with the production mode of the restoration, the restoration and the image quality meters are arranged side by side for X-ray nondestructive detection, and the imaging of the metal sheets with known thickness is measured by a densimeter or a digital image processing method, so that the thickness of the restoration is evaluated.
However, the above-mentioned prior art thick sheet has several disadvantages in use:
(1) the manufacturing cost is high, because different elements have different absorption coefficients to X-ray, the metal thickness sheet used for determining the thickness of the measured object in the X-ray detection method needs the same chemical components as the measured object, but the metal material used on the dental restoration has wide material sources, and about hundreds of products are counted according to the existing registration certificate of the products, and mainly comprise cobalt-chromium alloy, nickel-chromium alloy, titanium and titanium alloy, silver-based alloy, palladium-based alloy, gold alloy and the like; even if the product is also called cobalt-chromium alloy, the content of cobalt and chromium in the products produced by different enterprises is different, and the content of other elements added is also different, so if the thickness of the restoration is to be accurately measured, the image quality meter for evaluation must be made for the product of each production enterprise, and the stepped image quality meters which are matched to meet the use need are expensive.
(2) The process is complicated. The dental metal materials are all small blocky or small flaky metals, such as gold alloy which is a square small metal sheet with the thickness of 1mm and the length of about 10 mm; the silver-based or palladium-based alloy is also generally a cuboid with a cross section of 3mm square and a length of less than 20 mm; the step-shaped metal sheet is made of such a raw material, and a casting method is generally used. The casting of metal is a relatively strong process, requires special personnel and equipment, and gropes on the casting process of metal materials of different materials, and needs to spend certain time and energy, so that the technical difficulty is high, and the requirements of users are difficult to meet in time.
(3) The manufacturing cycle is long. Production enterprises are endless, the replacement frequency of the registration certificate of the product is high, the product is likely to be invalid after paying a large amount of money, time and energy, and the corresponding standard thickness sheet cannot meet the use requirement in real time aiming at the new denture material.
Disclosure of Invention
The invention aims to overcome at least one defect of the prior art and provides a preparation method of a metal standard thickness sheet for evaluating the internal quality of a denture, which is used for solving the problems of complex preparation process, long preparation time and high cost of the thickness sheet.
The invention adopts the technical scheme that the preparation method of the metal standard thickness sheet for the internal quality evaluation of the false tooth comprises the following steps:
s1, mosaic processing: carrying out mosaic processing on the metal body;
s2, cutting: cutting the metal body after the embedding treatment to obtain a plurality of thickness sheets with the thickness of more than or equal to 0.2 mm;
s3, packaging: the thick sheet package is fixed in a material that is weakly absorbing to X-rays.
The invention relates to a preparation method of a metal standard thickness sheet (thickness sheet for short) for evaluating the internal quality of a false tooth, which comprises the following three steps: firstly, selecting a proper mosaic body material and carrying out mosaic on a metal material; secondly, finely cutting the metal body after the inlaying treatment, wherein the cutting precision can reach +/-0.003 in a cutting mode to meet the cutting requirement, and cutting a plurality of thickness sheets with the thickness value not less than 0.2 mm; and finally, packaging and fixing the thickness sheet prepared by the steps in a material which is weakly absorbed by X rays.
According to the preparation method, the metal body is inlaid by using the inlaying process firstly, because the thickness of the metal thickness sheet is very thin and the hardness is low, the hardness is generally between 100HV and 300HV, the metal thickness sheet can be curled and bent by the subsequent cutting process, and particularly when mechanical cutting is used, the cutting wheel is easy to deviate from the cutting surface to cause the thickness of the cut metal thickness sheet to be uneven, so that the inlaying process is used before cutting, the problems of curling, eccentricity and the like of the metal thickness sheet in the cutting process can be solved, and the metal thickness sheet with even thickness can be obtained; the preparation method provided by the invention has the advantages that the whole preparation process is simple and easy to realize through three processes of embedding, cutting and packaging, the technology is suitable for any demander to prepare by himself, the production efficiency is high, the cost is low, and the use requirements can be met in real time and in time.
Further, the metal body is dental metal raw material or a casting piece same as a casting process or casting channel waste generated by casting the denture.
The material of the metal body required in the preparation method is the same as that of the false tooth, so that dental metal raw materials or casting raw materials of the thickness sheet in the existing casting process or casting channel waste materials generated in the false tooth casting process can be selected, and the absorption consistency of the thickness sheet can be ensured.
Further, the step S1 specifically includes: and carrying out hot inlaying treatment or cold inlaying treatment on the metal body according to the selected inlaying body.
Selecting a proper mosaic body material, carrying out mosaic on a metal body according to a mosaic process corresponding to the mosaic body, and mosaic the mosaic body on the metal material which is the same as the false tooth material to obtain the mosaic metal body, wherein the mosaic step is used for preventing a cutting piece from curling or bending during fine cutting in the subsequent step, and the mosaic method comprises the following two steps: the hot-pressing inlaying method (also called hot inlaying method) and the cold inlaying method are characterized by high quality, uniform size and appearance, short preparation time and the like; the cold setting method is suitable for simultaneous treatment of a large number of different types of samples and selection when a single sample needs to be treated. The technical means of the present invention for tessellation processing is not limited to hot or cold tessellation, and the choice of hot or cold tessellation depends on the type of tessellation.
Further, the hot inlaying treatment specifically comprises the following steps:
s11, placing the metal body in a mold cup;
s12, injecting the polyacetal into a mold cup, keeping the temperature and the pressure for a period of time at 250 ℃, and then cooling;
and S13, demolding and taking out after the metal body is completely cooled.
When the hot inlaying treatment is adopted, an inlaying machine is needed, firstly, the metal body is placed in a mold cup of the inlaying machine, then the polyacetal inlaying body is injected into the mold cup, the metal body is cooled after the heat preservation and pressure maintaining are carried out for 2 minutes at the temperature of 250 ℃, and finally, the metal body is demoulded after being cooled and is taken out after the inlaying is finished. According to the invention, the selected embedding material is polyacetal, and the hot embedding operation is correspondingly selected to carry out embedding treatment on the metal body, and the prepared metal thickness sheet has very thin thickness and lower hardness, so that the prepared metal thickness sheet can be curled and bent when the metal body raw material is directly cut.
Further, the cold-setting treatment specifically includes:
s11': placing a metal body in a mold cup;
s12': mixing epoxy resin and a curing agent according to the mass ratio of 4.4:1 to prepare an mosaic body;
s13': and (4) injecting the mosaic body into the mold cup, standing for a period of time at room temperature, and finishing cold mosaic treatment after the mosaic body is solidified.
And if the selected embedding material is epoxy resin, a cold embedding process is selected to inlay the metal body, the metal body is firstly placed in a mold cup, the epoxy resin and a curing agent are mixed for about 1 minute according to the mass ratio of 4.4:1 to form an embedding body, the embedding body is injected into the mold cup, then the embedding body is cured for 90-120 minutes at room temperature or until the sample is cured, and finally the metal body after the embedding is finished is taken out. According to the invention, the selected embedding material is epoxy resin, and a cold embedding process is correspondingly selected to carry out embedding treatment on the metal body. The prepared metal thickness sheet is very thin and low in hardness, so that the prepared metal thickness sheet is curled and bent when a metal body raw material is directly cut.
Further, the epoxy resin is an epoxy resin of EpoKwick (TM) FC.
Further, the cutting process is mechanical cutting or wire cutting or laser cutting.
And cutting the metal body after the inlaying treatment into a thickness sheet with the thickness not less than 0.2mm by adopting a cutting process, wherein the cutting precision can reach +/-0.003 mm, the cutting requirements can be met, and the cutting modes meeting the conditions mainly comprise mechanical cutting, linear cutting and laser cutting. Wherein, the mechanical cutting is a technical process that the processed metal is extruded by scissors to generate shearing deformation and reduce cracking and separation; wire cutting, also known as electrospark wire cutting, is performed by high-temperature fusing of an electric spark; the laser cutting utilizes high-power-density laser beams to irradiate the cut material, the cut material is quickly heated to vaporization temperature and is evaporated to form holes, and the holes continuously form slits with narrow width along with the movement of the beams to the material, so that the cutting of the material is completed.
Further, the material which absorbs X-rays weakly is a thin polymer plastic product.
The metal thickness sheet is packaged by adopting a material which absorbs X rays weakly, so that interference factors of a packaging shell are eliminated, and the stability of the prepared thickness sheet in measuring an X-ray absorption value is ensured. Specifically, the packaging shell material adopted by the invention is a thin polymer plastic product.
Further, the plurality of thickness pieces includes at least 5 thickness pieces of different uniform thicknesses.
The thickness of the thickness pieces can be prepared according to the requirements of actual experimental use, and at least 5 thickness pieces with different uniform thicknesses are included in the standard thickness pieces for evaluating the internal quality of the denture so as to meet the basic measurement standard.
Further, the thickness values of the plurality of thickness sheets should be distributed between 0.2mm and 1.0mm, and the distance between each thickness sheet is about 0.1 mm.
The thickness pieces prepared by the method at least comprise 5 thickness pieces with different uniform thicknesses, wherein the optimal cutting combination thickness of one group is 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm and 1.0 mm.
Compared with the prior art, the invention has the beneficial effects that: the invention relates to a preparation method of a metal standard thickness sheet for internal quality evaluation of a denture, which is characterized in that the prepared raw material is a metal body without special process treatment, and the material is consistent with that of the denture to be evaluated, so that the absorption consistency of the thickness sheet can be ensured; by adopting the embedding mode, the problems of curling, eccentricity and the like in the subsequent process cutting process can be solved, and metal thickness sheets with uniform thickness can be finally obtained; the cutting process ensures that the process time period for preparing the thickness sheet is short and the technical difficulty is low; the whole preparation process is simple in technology and easy to realize, is suitable for any demander to prepare by himself, is high in production efficiency, and can meet the use requirements in real time and in time.
Drawings
FIG. 1 is a flowchart illustrating steps according to an embodiment of the present invention.
Detailed Description
The drawings are only for purposes of illustration and are not to be construed as limiting the invention. For a better understanding of the following embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The metal standard thickness sheet (thickness sheet for short) for the internal quality evaluation of the false tooth prepared by the embodiment of the invention is used for quantitatively testing the thickness of the occlusal surface of the false tooth when the performance of a false tooth product is detected.
Example 1
As shown in fig. 1, a method for preparing a metal gauge thickness sheet for denture internal quality evaluation, which comprises the following steps:
s1, mosaic processing: carrying out mosaic processing on the metal body;
s2, cutting: cutting the metal body after the embedding treatment to obtain a plurality of thickness sheets with the thickness of more than or equal to 0.2 mm;
s3, packaging: the thick sheet package is fixed in a material that is weakly absorbing to X-rays. Specifically, in the embodiment of the present invention, the material which absorbs X-rays weakly is a thin polymer plastic product.
Specifically, the material selected for the metal body in the embodiment of the invention is the same as the denture material, so that the absorption consistency of the metal thickness sheet during quantitative test can be ensured, and the selected material source can be dental metal raw materials, a casting part which is the same as the casting process in the prior art, and casting channel waste materials generated in the denture casting process.
Preferably, step S1 in this embodiment of the present invention specifically includes: and carrying out hot inlaying treatment on the metal body according to the selected inlaying body.
Preferably, the hot inlaying treatment in the embodiment of the present invention specifically includes the following steps:
s11, placing the metal body in a mold cup;
s12, injecting the polyacetal into a mold cup, keeping the temperature and the pressure for a period of time at 250 ℃, and then cooling;
and S13, demolding and taking out after the metal body is completely cooled.
In the concrete implementation process, a commercially available dental metal block or a waste casting channel generated in the false tooth casting process is cut into a proper size, and then a sample with a proper size is inlaid by adopting an inlaying mode. The selected mosaic material is EpoMet F polyacetal mosaic material, and the hot mosaic method is correspondingly selected, so that the hot mosaic method has the characteristics of high quality, uniform size and appearance, short preparation time and the like.
Specifically, the implementation process of the hot inlaying treatment is as follows: the hot inlaying process needs to use an inlaying machine, the inlaying machine in the embodiment of the invention is an American Standard SimpliMet 4000 inlaying machine, firstly, a dental metal block purchased from the market or a waste casting channel generated in the false tooth casting process is cut into a proper size and placed in a mold cup of the American Standard SimpliMet 4000 inlaying machine, then an EpoMet F polyacetal inlaying material is injected into the mold cup, the temperature and pressure are kept for 2min at the temperature condition of 250 ℃, the sample can be taken out after being cooled, and the metal body and the inlaying material are tightly inlaid together, so that the hot inlaying process is completed.
Preferably, the cutting process in the embodiment of the present invention is mechanical cutting, linear cutting or laser cutting, but the cutting process is not limited to the above cutting method, and the cutting method can be any cutting method that meets the cutting requirement of ± 0.003mm cutting precision.
Specifically, in step S2, a cutting process is performed on the metal body after the damascene processing, and the specific implementation process is as follows: a plurality of metal thickness sheets with the thickness not less than 0.2mm are cut by a high-speed precision cutting machine (the cutting precision is 1 mu m) with the model of American Standard HighSpeed Pro, the thickness value interval of the plurality of metal thickness sheets is 0.1mm, and in the metal standard thickness sheets for evaluating the internal quality of the false tooth in the embodiment of the invention, a group of optimum thickness sheets with the cutting thicknesses of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm and 1.0mm are adopted for measuring the X-ray absorption value.
Therefore, the preparation method of the metal standard thickness sheet for the internal quality evaluation of the denture is characterized in that the prepared raw material is a metal body without special process treatment, and the material is consistent with that of the denture to be evaluated, so that the absorption consistency of the thickness sheet can be ensured; the metal thickness sheet is very thin and low in hardness, and the hardness of the metal thickness sheet is generally between 100HV and 300HV, so that the situation of curling and bending is easy to occur in the cutting process, and the conditions of curling, eccentricity and the like in the subsequent process cutting process can be solved by adopting an inlaying mode, so that the metal thickness sheet with uniform thickness can be obtained by cutting; the cutting process ensures that the process time period for preparing the thickness sheet is short and the technical difficulty is low; and the whole preparation process is realized by three processes of embedding, cutting and packaging, the technology is simple and easy to realize, the preparation method is suitable for any demander to prepare by oneself, the production effect is high, and the use requirements can be met in real time and in time.
Example 2
The embodiment of the invention provides a preparation method of a metal standard thickness sheet for internal quality evaluation of a denture, which comprises the following steps:
s1, mosaic processing: carrying out mosaic processing on the metal body;
s2, cutting: cutting the metal body after the embedding treatment to obtain a plurality of thickness sheets with the thickness of more than or equal to 0.2 mm;
s3, packaging: the thick sheet package is fixed in a material that is weakly absorbing to X-rays. Specifically, in the embodiment of the present invention, the material which absorbs X-rays weakly is a thin polymer plastic product.
Specifically, the material selected for the metal body in the embodiment of the invention is the same as the denture material, so that the absorption consistency of the metal thickness sheet during quantitative test can be ensured, and the selected material source can be dental metal raw materials, a casting part which is the same as the casting process in the prior art, and casting channel waste materials generated in the denture casting process.
Preferably, step S1 in this embodiment of the present invention specifically includes: and carrying out cold-inlaying treatment on the metal body according to the selected inlaying body.
Preferably, the cold-setting treatment in the embodiment of the present invention specifically includes:
s11': placing a metal body in a mold cup;
s12': mixing epoxy resin and a curing agent according to the mass ratio of 4.4:1 to prepare an mosaic body, wherein the adopted epoxy resin is EpoKwick (TM) FC epoxy resin;
s13': and (4) injecting the mosaic body into the mold cup, standing for a period of time at room temperature, and finishing cold mosaic treatment after the mosaic body is solidified.
In the concrete implementation process, a commercially available dental metal block or a waste casting channel generated in the false tooth casting process is cut into a proper size, and then a sample with a proper size is inlaid by adopting an inlaying mode. The selected mosaic material is epoxy resin of EpoKwickTM FC, and a cold mosaic treatment mode is correspondingly selected, so that the epoxy resin has the characteristics of low shrinkage, long curing time, good edge protection, vacuum impregnation, suitability for porous materials and the like.
Specifically, the implementation process of the cold-setting treatment is as follows: and placing the metal body in a mold cup, mixing the epoxy resin of EpoKwick (TM) FC and the curing agent according to the mass ratio of 4.4:1 for about 1 minute to form an inlay body, injecting the inlay body into the mold cup to be mixed with the metal body, curing for 90-120min at room temperature or until a sample is cured to form the inlaid metal body, and finishing the cold-inlaid process.
Preferably, the cutting process in the embodiment of the present invention is mechanical cutting, linear cutting or laser cutting, but the cutting process is not limited to the above cutting method, and the cutting method can be any cutting method that meets the cutting requirement of ± 0.003mm cutting precision.
Specifically, in step S2, a cutting process is performed on the metal body after the damascene processing, and the specific implementation process is as follows: a plurality of metal thickness sheets with the thickness not less than 0.2mm are cut by a high-speed precision cutting machine (the cutting precision is 1 mu m) with the model of American Standard HighSpeed Pro, the thickness value interval of the plurality of metal thickness sheets is 0.1mm, and in the metal standard thickness sheets for evaluating the internal quality of the false tooth in the embodiment of the invention, a group of optimum thickness sheets with the cutting thicknesses of 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm and 1.0mm are adopted for measuring the X-ray absorption value.
Therefore, the preparation method of the metal standard thickness sheet for the internal quality evaluation of the denture is characterized in that the prepared raw material is a metal body without special process treatment, and the material is consistent with that of the denture to be evaluated, so that the absorption consistency of the thickness sheet can be ensured; the metal thickness sheet is very thin and low in hardness, and the hardness of the metal thickness sheet is generally between 100HV and 300HV, so that the situation of curling and bending is easy to occur in the cutting process, and the conditions of curling, eccentricity and the like in the subsequent process cutting process can be solved by adopting an inlaying mode, so that the metal thickness sheet with uniform thickness can be obtained by cutting; the cutting process ensures that the process time period for preparing the thickness sheet is short and the technical difficulty is low; and the whole preparation process is realized by three processes of embedding, cutting and packaging, the technology is simple and easy to realize, the preparation method is suitable for any demander to prepare by oneself, the production effect is high, and the use requirements can be met in real time and in time.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention claims should be included in the protection scope of the present invention claims.
Claims (10)
1. A preparation method of a metal standard thickness sheet for internal quality evaluation of dentures is characterized by comprising the following steps:
s1, mosaic processing: carrying out mosaic processing on the metal body;
s2, cutting: cutting the metal body after the embedding treatment to obtain a plurality of thickness sheets with the thickness of more than or equal to 0.2 mm;
s3, packaging: the thick sheet package is fixed in a material that is weakly absorbing to X-rays.
2. The method for preparing a metal gauge thickness sheet for use in the internal quality evaluation of dentures according to claim 1, wherein the metal body is dental metal stock or the same casting as a casting process or cast-pass discard generated from casting dentures.
3. The method for preparing a metal gauge thickness sheet for denture internal quality evaluation according to claim 1, wherein the step S1 specifically comprises:
and carrying out hot inlaying treatment or cold inlaying treatment on the metal body according to the selected inlaying body.
4. The method for preparing the metal standard thickness sheet for the internal quality evaluation of the denture as claimed in claim 3, wherein the hot-setting treatment specifically comprises the following steps:
s11, placing the metal body in a mold cup;
s12, injecting the polyacetal into a mold cup, keeping the temperature and the pressure for a period of time at 250 ℃, and then cooling;
and S13, demolding and taking out after the metal body is completely cooled.
5. The method for preparing the metal standard thickness sheet for the internal quality evaluation of the denture as claimed in claim 3, wherein the cold-setting treatment specifically comprises:
s11': placing a metal body in a mold cup;
s12': mixing epoxy resin and a curing agent according to the mass ratio of 4.4:1 to prepare an mosaic body;
s13': and (4) injecting the mosaic body into the mold cup, standing for a period of time at room temperature, and finishing cold mosaic treatment after the mosaic body is solidified.
6. The method for preparing a metal gauge sheet for denture internal quality evaluation according to claim 5, wherein the epoxy resin is EpoKwickTM FC epoxy resin.
7. The method for preparing a metal gauge thickness sheet for denture internal quality evaluation according to claim 1, wherein the cutting process is mechanical cutting or wire cutting or laser cutting.
8. The method for preparing a metal gauge thickness sheet for denture internal quality evaluation according to claim 1, wherein the material weakly absorbing to X-rays is a thin polymer plastic.
9. The method for preparing a metal gauge thickness sheet for denture internal quality evaluation according to claim 1, wherein the plurality of thickness sheets comprises at least 5 thickness sheets with different uniform thickness.
10. The method for preparing a metal standard thickness sheet for the internal quality evaluation of a denture, according to claim 1, wherein the thickness values of the plurality of thickness sheets are spaced by 0.1 mm.
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Application publication date: 20200710 |