CN114177093A - Denture base material and preparation method thereof - Google Patents
Denture base material and preparation method thereof Download PDFInfo
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- CN114177093A CN114177093A CN202111530175.XA CN202111530175A CN114177093A CN 114177093 A CN114177093 A CN 114177093A CN 202111530175 A CN202111530175 A CN 202111530175A CN 114177093 A CN114177093 A CN 114177093A
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- carbon fiber
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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
- A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
- A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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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
- A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
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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
- A61K6/70—Preparations for dentistry comprising inorganic additives
- A61K6/71—Fillers
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Abstract
The invention provides a denture base material and a preparation method thereof, wherein the denture base material comprises the following steps: the carbon fiber reinforced polymethyl methacrylate substrate is characterized in that a hydrophilic layer is coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate; the hydrophilic layer is polymethyl methacrylate doped with sericin powder; the surface of the carbon fiber reinforced polymethyl methacrylate base material is provided with a plurality of protruding carbon fiber ends, and the protruding carbon fiber ends are coated by the hydrophilic layer. The denture base material provided by the invention can improve the mechanical property and the hydrophilic property of the material at the same time.
Description
Technical Field
The invention relates to the technical field of denture base preparation, in particular to a denture base material and a preparation method thereof.
Background
The dentition deletion means that no natural tooth or tooth root exists on the whole dental arch, and the artificial tooth manufactured for the dentition deletion patient is called a complete denture. Complete dentures exert their effects sufficiently in the oral cavity, and retention and stability of dentures are very important. The retention and stabilization of the denture material are not only related to the physical properties of the material, the chewing function of a patient, psychophysiological factors and mechanical factors, but also closely related to the hydrophilicity of the denture base material.
At present, the surface of a thermosetting resin base used clinically has poor hydrophilic performance, so that the solid position is poor, and fungi are easy to attach. And the mechanical properties are also poor, resulting in a short service life.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a denture base material, a method, a system, a terminal and a storage medium for preparing the same, so as to solve the above-mentioned technical problems.
In a first aspect, the present invention provides a denture base material comprising:
the carbon fiber reinforced polymethyl methacrylate substrate is characterized in that a hydrophilic layer is coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate; the hydrophilic layer is polymethyl methacrylate doped with sericin powder; the surface of the carbon fiber reinforced polymethyl methacrylate base material is provided with a plurality of protruding carbon fiber ends, and the protruding carbon fiber ends are coated by the hydrophilic layer.
Further, the length of the carbon fiber reinforced polymethyl methacrylate substrate is 2mm-5 mm.
Further, the carbon fiber has a length of 3 mm.
Further, the carbon fiber content of the carbon fiber reinforced polymethyl methacrylate substrate is 5% -9%.
Further, the thickness of the hydrophilic layer is 1mm-3 mm.
In a second aspect, the present invention provides a method for preparing a denture base material, comprising:
putting a base material mixture obtained by fully mixing methyl methacrylate copolymer powder, a methyl methacrylate monomer, an initiator and carbon fibers into a base material mold; placing the substrate mould into a curing environment, carrying out primary curing on the substrate mixture in the substrate mould at a curing temperature, and polishing the surface of the cured substrate mixture to expose the protruded carbon fiber end on the surface of the cured substrate mixture, so as to obtain a carbon fiber reinforced polymethyl methacrylate substrate;
taking methyl methacrylate copolymer powder, a methyl methacrylate monomer, an initiator and sericin powder, fully mixing to obtain a mixture, coating the mixture on the surface of a carbon fiber reinforced polymethyl methacrylate substrate, and putting the carbon fiber reinforced polymethyl methacrylate substrate coated with the mixture into a finished product mold; and placing the finished product mold into a curing environment, and carrying out secondary curing on the mixed material layer coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate at the curing temperature to obtain the denture base material.
Further, the average molecular weight of the methyl methacrylate copolymer powder was 5.0X 105The average grain diameter is 25-45 μm; the average molecular weight of the methyl methacrylate monomer is 100.12; the initiator is benzoyl peroxide.
Further, a constant-temperature water tank is adopted in the curing environment, the temperature is raised to 70 ℃ and kept for 90min after the constant-temperature water tank is placed in a mold, and the mold is a substrate mold or a finished product mold.
Furthermore, telescopic supporting protrusions are arranged in the finished product die, and after the carbon fiber reinforced polymethyl methacrylate substrate coated with the mixture is placed in the finished product die, the supporting protrusions are popped up, so that the supporting protrusions support the carbon fiber reinforced polymethyl methacrylate substrate, and the mixture layer is not extruded at the bottom of the carbon fiber reinforced polymethyl methacrylate substrate.
Further, the solid-to-liquid ratio of the methyl methacrylate copolymer powder and the methyl methacrylate monomer of the base material mixture and the coating mixture is 2.0; the carbon fiber content in the base material mixture is 5-9%; the sericin powder content of the mixture for coating is 1-5%.
The denture base material and the preparation method have the beneficial effects that the denture base material adopts a double-layer structure, the internal base material adopts the core mechanical property of a carbon fiber reinforced material, the surface of the base material is coated with a hydrophilic layer to enhance the surface hydrophilicity of the denture base, the base materials of the internal base material and the hydrophilic layer are polymethyl methacrylate, and the extending part of the carbon fiber of the internal base material can extend into the hydrophilic layer, so that the combination degree of the internal base material and the hydrophilic layer is greatly enhanced. The denture base material provided by the invention can improve the mechanical property and the hydrophilic property of the material at the same time.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic view of a denture base material according to an embodiment of the present invention.
Wherein, 1, a base material; 2. a hydrophilic layer; 3. carbon fibers.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and 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 invention.
Example 1
Specifically, referring to fig. 1, the denture base material provided by the present invention includes:
the carbon fiber reinforced polymethyl methacrylate substrate comprises a carbon fiber reinforced polymethyl methacrylate substrate 1, wherein a hydrophilic layer 2 is coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate; the hydrophilic layer 2 is polymethyl methacrylate doped with sericin powder. Wherein the length of the carbon fiber 3 is 3mm, and the carbon fiber 3 content of the carbon fiber-reinforced polymethyl methacrylate substrate 1 is 6% (by weight). The thickness of the hydrophilic layer 2 is 1mm, and the content of the sericin powder in the hydrophilic layer 2 is 3% (weight ratio).
The preparation method of the denture base material comprises the following steps:
collecting methyl methacrylate copolymer powder D-300 (average molecular weight 5.0 × 10)5Average particle size 25-45 μm), methyl methacrylate monomer MMA (average molecular weight 100.12), initiator (benzoyl peroxide) and carbon fiber (length 3mm), wherein the solid-to-liquid ratio of the methyl methacrylate copolymer powder to the methyl methacrylate monomer is 2.0, and the carbon fiber content is 6%. The above raw materials were mixed by a rotary mixer at 2000rpm for 60 seconds and poured into a base material mold (stainless steel groove). The specific method for injecting the substrate mold comprises the following steps: and (3) smearing a separating agent on the cavity wall of the substrate die, filling the material, covering the polyester film strip up and down after filling, covering the metal sheet, and pressurizing by using a press.
And (3) putting the substrate mould into a constant-temperature water tank, heating the water temperature of the constant-temperature water tank to 70 ℃, putting the substrate mould into the mould, boiling for 30 minutes, and heating and polymerizing for 60 minutes after boiling. And naturally cooling the polymerized stainless steel casting mold in a water tank for 24 hours, and taking out the stainless steel casting mold to obtain the base material. The paper No.240 and No.600 were ground in sequence under running water by a horizontal grinder, and since the strength of the carbon fiber was much higher than that of the polymethyl methacrylate, the polymethyl methacrylate was ground to remove a layer of the exposed carbon fiber ends. When grinding, the thickness of the ground-off material can not exceed 1 mm. The exposed carbon fiber end is coated by the hydrophilic layer of the follow-up secondary curing, the carbon fiber is inserted between the base material and the hydrophilic layer, the combination strength of the combination interface of the base material and the hydrophilic layer is enhanced, and the hydrophilic layer is prevented from being stripped from the combination interface due to long-term fatigue stress.
Then methyl methacrylate copolymer powder D-300 (average molecular weight 5.0 is multiplied by 10)5Average particle size of 25-45 μm), methyl methacrylate monomer MMA (average molecular weight of 100.12), initiator (benzoyl peroxide) and sericin powder (average molecular weight of 4.0 × 10), wherein the solid-to-liquid ratio of the methyl methacrylate copolymer powder to the methyl methacrylate monomer is 2.0, and the content of the sericin powder is 3%. The raw materials are rotationally mixed by a self-rotation mixer at the rotating speed of 2000rpm for 60 seconds and then coated on the surface of a base material, the coating thickness is controlled in the coating process, the thickness is controlled to be about 1mm, and the raw materials are injected into a finished product mold (a stainless steel groove slightly larger than the base material mold, and two ends of the finished product mold are respectively provided with a retractable probe). The specific method for injecting the finished product mold comprises the following steps: separating agent is smeared on the cavity wall of the finished product die and the probe, the materials are filled, the probe is ejected out after filling, the probe contacts the substrate, the supporting effect on the substrate is achieved, and the substrate is prevented from pressing the hydrophilic layer under the action of gravity to cause deformation of the hydrophilic layer. Then, the upper and lower sides are covered with a polyester film tape, and then with a metal sheet, and pressurized by a press.
And (3) putting the finished product mold into a constant-temperature water tank, heating the water temperature of the constant-temperature water tank to 70 ℃, putting the mold into the constant-temperature water tank, boiling for 30 minutes, and heating and polymerizing for 60 minutes after boiling. The stainless steel mold after polymerization was naturally left to cool in a water bath for 24 hours and then taken out, and then ground with abrasive papers No.240, No.600, No.1000, No.1200 in this order under running water with a horizontal grinder to obtain a denture base material 1.
Example 2
In this example, in comparison with example 1, carbon fibers of 3mm were replaced with carbon fibers of 5mm, the carbon fiber content was adjusted to 9%, and the sericin powder content was adjusted to 5%. A denture base material 2 was prepared according to the preparation method of example 1.
Example 3
In this example, in comparison with example 1, carbon fibers of 3mm were replaced with carbon fibers of 2mm, the carbon fiber content was adjusted to 5%, and the sericin powder content was adjusted to 1%. When the hydrophilic layer mixture is coated, the thickness is controlled to be 3 mm. A denture base material 3 was prepared according to the preparation method of example 1.
Comparative example 1
Collecting methyl methacrylate copolymer powder D-300 (average molecular weight 5.0 × 10)5Average particle size 25-45 μm), methyl methacrylate monomer MMA (average molecular weight 100.12), and initiator (benzoyl peroxide), wherein the solid-to-liquid ratio of methyl methacrylate copolymer powder to methyl methacrylate monomer is 2.0. The above raw materials were mixed by a rotation mixer at 2000rpm for 60 seconds and poured into a finished mold (probe was withdrawn). The specific method for injecting the finished product mold comprises the following steps: and (3) smearing a separating agent on the cavity wall of the finished product die, filling the material, covering the polyester film strip up and down after filling, covering the metal sheet, and pressurizing by using a press. And (3) putting the finished product mold into a constant-temperature water tank, heating the water temperature of the constant-temperature water tank to 70 ℃, putting the mold into the constant-temperature water tank, boiling for 30 minutes, and heating and polymerizing for 60 minutes after boiling. And naturally cooling the polymerized stainless steel casting mold in a water tank for 24 hours, and taking out the stainless steel casting mold to obtain the denture base material 4.
The denture base materials 1-4 were subjected to mechanical property test and hydrophilicity test:
mechanical characteristic analysis of the test piece: after the test pieces were periodically immersed in constant temperature drying ovens 0d, 14d, 30d, 90d, 180d, 360d, the test pieces were placed on a universal mechanical testing machine, a three-point bending test was performed according to ISO20795-1 with a span of 20mm, a loading speed of 0.5mm/min, an upper indenter radius of 2mm, the maximum load at break was recorded, and the bending strength (σ) was calculated as 3 fmo/2 WB 2 and the bending modulus (E) was calculated as FL o 3/4 δ WB 2 according to the following formulas. [ wherein F m sample breaking load value (N), F proportional limit load value (N), delta proportional limit deformation amount (mm), L o two-point distance (mm), W sample width (mm), B sample thickness (mm) ].
Preservation of each sample: soaking in 100 ml of distilled water at 37 +/-1 ℃ for 16 hours and 100 ml of distilled water at 23 +/-1 ℃ for 8 hours in a constant-temperature drying box for 0d, 14d, 30d, 90d, 180d and 360d in a periodic cycle. Analyzing the surface characteristics of the test piece: after each test piece is periodically soaked in a constant-temperature drying oven for 0d, 14d, 30d, 90d, 180d and 360d, a portable full-automatic contact angle measuring instrument is used for measuring the contact angle at intervals. The measurement temperature was (23. + -. 1) ° C, and the contact angle after dropping distilled water by a dropping method for 2 seconds was measured.
The experimental results of the above tests are shown in table 1:
| modulus of elasticity | Contact angle | |
| Denture base 1 | 5036.15 | 60.4 |
| |
3689.35 | 78.9 |
| |
3526.14 | 80.77 |
| Denture base 4 | 2948.37 | 87.1 |
TABLE 1 results of the experiment
As can be seen from the above experimental results, the denture base 1 exhibited the best modulus of elasticity and contact angle.
Although the present invention has been described in detail by referring to the drawings in connection with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A denture base material comprising:
the carbon fiber reinforced polymethyl methacrylate substrate is characterized in that a hydrophilic layer is coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate; the hydrophilic layer is polymethyl methacrylate doped with sericin powder; the surface of the carbon fiber reinforced polymethyl methacrylate base material is provided with a plurality of protruding carbon fiber ends, and the protruding carbon fiber ends are coated by the hydrophilic layer.
2. The denture base material according to claim 1, wherein the carbon fiber of the carbon fiber reinforced polymethyl methacrylate substrate is 2mm to 5mm in length.
3. The denture base material of claim 2, wherein the carbon fibers are 3mm in length.
4. The denture base material according to claim 1, wherein the carbon fiber-reinforced polymethylmethacrylate substrate has a carbon fiber content of 5% to 9%.
5. The denture base material of claim 1, wherein the hydrophilic layer has a thickness of 1mm to 3 mm.
6. A preparation method of a denture base material is characterized by comprising the following steps:
putting a base material mixture obtained by fully mixing methyl methacrylate copolymer powder, methyl methacrylate monomer, initiator and carbon fiber into a base material mold; placing the substrate mould into a curing environment, carrying out primary curing on the substrate mixture in the substrate mould at a curing temperature, and polishing the surface of the cured substrate mixture to expose the protruded carbon fiber end on the surface of the cured substrate mixture, so as to obtain a carbon fiber reinforced polymethyl methacrylate substrate;
taking methyl methacrylate copolymer powder, methyl methacrylate monomer, initiator and sericin powder, fully mixing to obtain a mixture, coating the mixture on the surface of the carbon fiber reinforced polymethyl methacrylate substrate, and putting the carbon fiber reinforced polymethyl methacrylate substrate coated with the mixture into a finished product mold; and placing the finished product mold into a curing environment, and carrying out secondary curing on the mixed material layer coated on the surface of the carbon fiber reinforced polymethyl methacrylate substrate at the curing temperature to obtain the denture base material.
7. The method according to claim 6, wherein the average molecular weight of the methyl methacrylate copolymer powder is 5.0 x 105The average grain diameter is 25-45 μm; the average molecular weight of the methyl methacrylate monomer is 100.12; the initiator is benzoyl peroxide.
8. The method according to claim 6, wherein the curing environment is a constant temperature water tank, and the temperature of the constant temperature water tank is raised to 70 ℃ and kept for 90min after the constant temperature water tank is placed in a mold, wherein the mold is a substrate mold or a finished mold.
9. The method according to claim 6, wherein a retractable supporting protrusion is arranged in the finished product mold, and after the carbon fiber reinforced polymethyl methacrylate substrate coated with the mixture is placed in the finished product mold, the supporting protrusion is ejected out, so that the supporting protrusion supports the carbon fiber reinforced polymethyl methacrylate substrate, and the mixture layer is not extruded at the bottom of the carbon fiber reinforced polymethyl methacrylate substrate.
10. The method according to claim 6, wherein the methyl methacrylate copolymer powder of the base material mixture and the coating mixture has a solid-to-liquid ratio of 2.0 for each of the methyl methacrylate monomers; the carbon fiber content in the base material mixture is 5-9%; the sericin powder content of the mixture for coating is 1-5%.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005049A1 (en) * | 1998-07-22 | 2000-02-03 | Koichi Okano | Fiber-reinforced plastic and denture base made therefrom |
| JP3041483B1 (en) * | 1999-02-22 | 2000-05-15 | 亀水化学工業株式会社 | Denture base composition and method for producing denture base using the composition |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000005049A1 (en) * | 1998-07-22 | 2000-02-03 | Koichi Okano | Fiber-reinforced plastic and denture base made therefrom |
| JP3041483B1 (en) * | 1999-02-22 | 2000-05-15 | 亀水化学工業株式会社 | Denture base composition and method for producing denture base using the composition |
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