WO2005097891A1 - 人工骨成形体の成形に用いる粉末組成物および板状成形体 - Google Patents
人工骨成形体の成形に用いる粉末組成物および板状成形体 Download PDFInfo
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- WO2005097891A1 WO2005097891A1 PCT/JP2005/007197 JP2005007197W WO2005097891A1 WO 2005097891 A1 WO2005097891 A1 WO 2005097891A1 JP 2005007197 W JP2005007197 W JP 2005007197W WO 2005097891 A1 WO2005097891 A1 WO 2005097891A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/40—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
- A61L27/44—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix
- A61L27/46—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having a macromolecular matrix with phosphorus-containing inorganic fillers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/28—Bones
- A61F2/2875—Skull or cranium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
- A61F2002/30957—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using a positive or a negative model, e.g. moulds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00179—Ceramics or ceramic-like structures
- A61F2310/00293—Ceramics or ceramic-like structures containing a phosphorus-containing compound, e.g. apatite
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00353—Bone cement, e.g. polymethylmethacrylate or PMMA
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
- C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
- C08J2333/12—Homopolymers or copolymers of methyl methacrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
Definitions
- the present invention relates to a powder material used for molding an artificial bone molded article: a plate-shaped composition suitable for forming an artificial bone molded article (the present invention relates to a book).
- hydroxyapatite Since hydroxyapatite is excellent in biocompatibility, it is narrowed down as a material constituting an artificial bone molded body to be supplemented to a bone part.
- Japanese Unexamined Patent Publication (Kokai) No. 61-68054 discloses that a pirates in which hydroxyapatite powder is dispersed in methacrylic acid is heated and heated in a mold to remove methyl methacrylate.
- a method for producing an artificial bone molded article Z in which hydroxyapatite powder is dispersed in a methyl methacrylate polymer by polymerization is disclosed.
- methyl methacrylate since methyl methacrylate has a large ratio when combined with S, it is polymerized in a mold in order to SBt a curved artificial bone molded body having a relatively large area, such as a scapula, for example. And cracks may occur. For this reason, after being formed into a lump having a sufficiently large size, it was cut into the desired curved shape. However, the cutting requires a lot of labor, and there are many wasteful parts. Disclosure of the invention
- the present inventor has conducted intensive studies to develop a composition that does not occur and has excellent storage stability and is used for molding an artificial bone molded article. As a result, the hydroxyapatite powder and the methyl methacrylate weight have been determined. The present inventors have found that a powder composition containing the combined powder can be stably stored for a long period of time, and the present invention has been achieved. In addition, a plate-like molded body in which hydroxyapatite powder is dispersed in a methyl methacrylate polymer can be easily transformed into a large-area curved artificial bone molded body by heating and deforming along a molding die. They found that they could be molded, leading to the present invention.
- the present invention provides an exfoliated product containing hydroxyapatite powder and methacrylic acid methyl polymer powder, and a plate-like molded product in which hydroxyapatite powder is dispersed in methyl methacrylate polymer. .
- the particle size of the hydroxyapatite powder used in the present invention is usually 1 mm or less, preferably 0.5 or less, usually 1 xm or more, and may be fine or granular. May be.
- the hydroxyapatite powder may be a natural hydroxyapatite powder produced from nature, or an artificial hydroxyapatite powder artificially synthesized from a calcium compound and a phosphate compound. It may be ground before use.
- the methyl methacrylate polymer powder used in the present invention is obtained by polymerizing a monomer having methyl methacrylate as a main component, usually a monomer having a methacrylate methyl content of 90 parts by weight or more. It is a powder of a methyl polymer.
- the methyl methacrylate polymer may be a methyl methacrylate polymer obtained by polymerizing methacrylic methyl in a profession, or may be methacrylic methyl and other monomers copolymerizable therewith.
- a copolymer of Other monomers copolymerizable with methacrylic methyl include, for example, a monomer having one double bond (monofunctional monomer) copolymerizable with methyl methacrylate; And two or more monomers (polyfunctional monomers).
- Monofunctional monomers include, for example, methyl acrylate, ethyl acrylate, acryl propyl, acryl butyl, 2-ethylhexyl acrylate, acryl lauryl, tetrahydrofurfuryl acrylate, isopornyl acrylate, acrylic acid Esters of acrylic acid with fatty alcohols such as cyclohexyl, etc., alcohols such as sm ⁇ alcohol, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, 2-ethyl methacrylate Such as hexyl, lauryl methacrylate, tetrahydrofurfuryl methacrylate, isopornyl methacrylate, cyclohexyl methacrylate, etc.
- Crylic acid and fatty female alcohol examples include acrylic acid, methacrylic acid, and vinyl acetate.
- Polyfunctional monomers include, for example, aryl methacrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, and polypropylene glycol diol.
- (Meth) acrylate 1,3-butylene glycol di (meth) acrylate, 1,6-hexanediyl di (meth) acrylate, neopentyldaricol di (meth) acrylate, divinylbenzene, diarylphthalate, tri Examples include methylolpropane tri (methyl) acrylate, tetramethylol methane tri (meth) acrylate, tetramethyl methane tetra (meth) acrylate, and the like.
- (meth) acrylate refers to methacrylate or acrylate.
- the methacrylic methyl polymer can be used to harden particulate matter by the usual methods such as emulsion polymerization, suspension polymerization, melt-fusion, and dispersion polymerization.
- a particle-shaped i-i powder may be used as it is, or may be further pulverized and used.
- the methacrylate methyl polymer can be formed into a bulk form by a method such as a norex polymerization method or a cast polymerization method.
- the methacrylate methacrylate polymer which constitutes the product of the present invention can be obtained.
- the powder may be used by pulverizing, for example, a methyl methacrylate methacrylate polymer produced in a lump.
- the weight average ⁇ * of the methacrylic methyl polymer is preferably 80,000 to 400,000. If it is less than 80,000, the mechanical strength of the artificial bone molded article obtained by molding the powdered pirates of the present invention tends to be reduced, and if it exceeds 400,000, molding tends to be difficult. .
- the methacrylic methylile polymer may be crosslinked, but is preferably non-crosslinked.
- Non-cross-linked methyl methacrylate polymer completely dissolves when it is dissolved in black hole form, and it is preferable that the gel fraction, which is the ratio of insoluble components, is 0%.
- examples thereof include a polymer obtained by polymerization and a copolymer with a monofunctional monomer. Meanwhile, Methacri! / m-methyl and polyfunctional monomer are copolymerized to obtain a cross-linked methyl methacrylate polymer. If a body is used, it may not melt sufficiently at the time of molding, and may have many voids, resulting in a molded body having a low mechanical bow key.
- the average particle diameter of the methyl polymer powder is usually 1 mm or less, preferably 0.5 mm or less, and usually l // m or more. If it exceeds 1 mm, it tends to be difficult to mix uniformly with the hydroxyapatite powder.
- the male ratio of hydroxyapatite powder is too large, there is a tendency that the molded product obtained by molding the powder extrudate has many voids and the bow is low. If the weight ratio of the hydroxyapatite powder is too small, biocompatibility tends to decrease.
- the weight ratio of the hydroxyapatite powder to the methyl methacrylate polymer powder is usually 78:22 to 40:60, preferably 73:27 to 45 by weight. : About 5 5
- the powdered product of the present invention can be easily subjected to SSi by a method of mixing hydroxyapatite powder and methyl methacrylate polymer powder.
- the powder composition of the present invention is useful as an artificial bone molding composition used for producing an artificial bone molded article.
- the powdered article may be heated to a molten state, and then molded in a molding die.
- the material of the mold may be, for example, a plaster, or a metal material such as stainless steel.
- the shaping mold may be made precisely by, for example, the CT scan method according to the size of the target bone defect, or may be made larger than the size of the bone M member. It may be something.
- the heat release during molding is a fig in which the methcliffe methyl polymer powder melts and does not become ⁇ , and is usually about 180 ° (: about 280. Is melted and formed into the shape of the molding die In order to precisely mold the product into the desired shape, it is preferable to completely melt the methyl methacrylate polymer powder, It is preferable to press and mold the material in the state.
- an artificial bone molded product having a structure in which hydroxyapatite powder is dispersed in a methyl methacrylate polymer, with a decomposing odor, a leg, and removed from the mold.
- the above-mentioned kintoru can be used for, for example, an artificial bone molded article having a relatively large area by forming a plate-shaped molded article.
- the thickness of the plate-shaped molded article is usually about lmm to 10 mm, and the area is 3 OmmX 3 Omn! ⁇ 200 Marshall X X 200 ⁇ .
- the thickness is preferably at least 1 due to the strength of the obtained molded body.
- the thickness of the plate-like molded product is usually 2 O mm or less. From the viewpoint of moldability into an artificial bone molded body, the dimensions of the plate-shaped molded body are preferably 30 mm ⁇ 30 mm or more, and usually 20 mm ⁇ 20 mm or less.
- the plate-like molded article of the present invention includes, for example, a hot press method in which a hydroxyapatite powder and a methyl methacrylate polymer powder are mixed and then heated and then added by a mold.
- a hot press method in which a hydroxyapatite powder and a methyl methacrylate polymer powder are mixed and then heated and then added by a mold.
- imm This is a fig in which the methyl methacrylate polymer melts and does not heat, and is usually between 180 ° C and 280 ° C.
- the methyl methacrylate polymer used in the hot press is preferably non-crosslinked in that a plate-like molded body having a small mechanical gap and excellent mechanical key is obtained. It is preferable to reduce the pressure inside.
- a monomer that is difficult to form a methyl methacrylate polymer specifically, methyl methacrylate or methyl methacrylate and other monomers copolymerizable therewith as described above.
- the mixture can be mixed with hydroxyapatite powder and polymerization initiator to form 3 ⁇ 4 ⁇ in a mold, and then polymerized in the mold.
- non-crosslinked methyl polymer As a non-crosslinked methyl polymer, a non-crosslinked methacrylic methyl polymer is melted with a hydroxyapatite powder and extruded into a plate shape. You can also «3 ⁇ 4 Molten weaving is usually carried out using an extruder, where the methyl methacrylate polymer is melted and the heat is not suitable, usually between 180 and 28 OX.
- the plate-like molded article of the present invention is easy to handle and store because it has no ⁇ due to methacrylo-low methyl, and does not polymerize and cure the methacrylyl-released methyl.
- the plate-like molded article of the present invention is preferably used as an artificial bone-forming plate-like molded article used for the artificial bone molded article ⁇ t.
- This plate-like molded article is heated and shaped along a molding die, so-called An artificial bone molded body can be obtained by heat removal.
- the heating at the time of shaping along the forming die can easily deform the plate-like molded article by an external force.
- the temperature is usually 120 ° C. or higher, though it varies depending on the monomer # methacrylate ratio to be formed, ⁇ *, the presence or absence of crosslinking, and the like. Also, it is below the fig at which the methyl methacrylate polymer melts or melts, and usually below 180.
- the plate-shaped molded body may be pressed toward the molding die by compressed air, etc., but simply placing the plate-shaped molded body on the molding die will cause the force of the plate-shaped molded body to be reduced by gravity and the molding will be performed. can do.
- the molded product thus obtained is obtained by dispersing hydroxyapatite powder in a methyl methacrylate polymer, and is useful as an artificial bone molded product, particularly an artificial bone molded product for a skull having a relatively large area.
- the specific gravity was determined by The higher the specific gravity, the smaller the voids in the molded body. (5) Average particle size of methyl methacrylate polymer powder
- Sieving was performed using meshes having different openings, and the weight was determined as a weight average particle size.
- the molded body is processed into a disk with a diameter of 2 lmm and a thickness of 2 to 3 mm. After sterilization, it is placed on a 12-we1 plate, and the ossified cell line (MC3T3-E1) 6X Ten were seeded and used as test pieces.
- the cells were cultured in an atmosphere of 37, 5% it) carbon dioxide, and test specimens were taken out after 1, 3, 5, and 7 days, respectively.
- the cells were detached from the test piece after culturing using 0.25 SS trypsin solution, neutralized and washed, and then fine Ji Fiber was counted using a hemocytometer.
- polymethyl methacrylate warworms using the same disk-shaped control as above, was operated in the same manner as described above, and the number of honken was counted in the same manner. From the brittleness N on the test piece and the cell number Nc on the control, the equation (2)
- M (1 ogioN-1 o gioNi) / (lo gioNc-1 og 10 Ni C ) (2) [where N1 is the number of cells after 1 day! ⁇ And NIC is the number of cells after 1 day. ⁇ ⁇ in each is shown. ] To calculate the relative cell growth rate (M). The higher the relative cell growth rate, the higher the biocompatibility. Sickle example 1
- Hydroxyapatite powder (“Pone Serum P G0”, manufactured by Sumitomo Pharmaceutical Co., Ltd., particle size 0.1 or less] 50 parts by weight, and a methyl methacrylate polymer powder obtained by suspension polymerization [weight average ⁇ 130,000 , Meaturi! / ⁇ Metile 98.5 weight ⁇ ! Non-crosslinked copolymer of ⁇ and methylile acrylate 1.5% by mass, particle size 0.05 mm-0.3 mm, average particle size 0.2 mmj 50 mass parts in a polyethylene bag The powder composition was obtained after the tide. The smell of this powdered creature I was careless.
- the powdered yarn obtained above is placed in a 10 cm ⁇ 10 cm deep 5 mold formed of a stainless steel plate and a stainless steel frame placed thereon. It was placed on a board, and the board surface was pressed with a 100 ton press heated to 230 ° C. for 10 minutes and pressed to form a body. At this time, the methyl methacrylate polymer powder was melted in a solid state. After pressing, the board surface was controlled while applying pressure with a 10-ton press cooled to 20 ° C. After the legs, the stainless steel plate and the metal frame were removed to obtain a flat molded body having a size of 10 cm ⁇ 10 cm and a thickness of 5 mm. Table 1 shows the evaluation results of this molded product. ⁇ Example 2
- Example 4 As a hydroxyapatite powder, from Yi Co., Ltd. ⁇ "Bone Serum PG 1", which has a diameter of 0.1 mm to 0.3 mm), and operates in the same manner as in Example 1 using 50 parts by weight to obtain a powdery extinct product and to obtain a molded product. Got. Table 1 shows the cage results of the obtained molded body.
- Example 4 As a hydroxyapatite powder, from Yi Co., Ltd. ⁇ "Bone Serum PG 1", which has a diameter of 0.1 mm to 0.3 mm), and operates in the same manner as in Example 1 using 50 parts by weight to obtain a powdery extinct product and to obtain a molded product. Got. Table 1 shows the cage results of the obtained molded body.
- Example 4 shows the cage results of the obtained molded body.
- Methyl methacrylate polymer powder methyl methacrylate polymer powder obtained by suspension polymerization method (weight average 750,000, non-crosslinked methyl methacrylate polymer, particle size 2 m-25 m, average particle (Diameter 8 m) using 50 parts by weight is operated in the same manner as in Difficult Example 3. As a result, a powdery yarn product was obtained, and a molded product was obtained. Table 1 shows the cage results of the obtained molded body. Yes
- Amount used (mass ⁇ 5 0 7 0 5 0 7 5 5 5 0
- Relative reproductive rate (%) 1 3 0 1 2 0 ⁇ ⁇ ⁇
- the amount of hydroxyapatite powder (“Poncerum PGl”) used was 80 parts by weight, and the conversion of methyl methacrylate polymer powder was 2 parts.
- methacrylic methyl polymer powder [weight average ⁇ 130000, non-crosslinked copolymer]
- methacrylic methyl polymer powder obtained by a suspension polymerization method [methacrylic acid methyl 90 dragon parts and ethylene glycol Using a crosslinked polymer with 10 parts by weight of methacrylate, a gelation ratio of 98%, and an average particle diameter of 4] 50 parts by weight, a molded article was obtained in the same manner as in Example 3. Table 2 shows the results of the molding obtained.
- methyl methacrylate polymer powder obtained by suspension polymerization method [methacrylic acid methyl methyl 90 parts by weight and ethylene Dalicol dimethacrylate crosslinked polymer with 10 parts by weight, gel fraction 100%, average particle size 10 m) 25 parts by weight was used! Got.
- Table 2 shows the results of the obtained molded body.
- Average particle size (mm) 0.2 0.008 0.004 0.01 0.2
- HAP powder hydroxyapatite powder
- Hydroxyapatite powder (“Pawn Serum PG 1 J, sold by Sumitomo Pharmaceutical Co., Ltd., particle size: 0.1-0.3 mm”) 65 parts by weight, and methyl methacrylate weight obtained by suspension polymerization Combined powder ® * Average liver volume 170,000 Non-crosslinked copolymer with methyl methacrylate 98,5 doublet and methyl acrylate 1.5 parts by weight, particle size 0.0 5 35 parts of an average particle diameter of 0.2 mm] was placed in a polyethylene bag and stirred well to obtain a powder composition.
- the plate-shaped molded body obtained above was placed on a gypsum-shaped gypsum mold, and when the gypsum mold was heated to 240, the plate-shaped molded body gradually softened and followed the shape of the gypsum mold. Deformed. After the operation, it was taken out of the mold to obtain a human skull-shaped artificial bone molded body. Visual inspection of this compact showed no defects such as voids, blemishes or S. Difficult case 1 2
- Example 11 In place of the flat molded article obtained in Example 11, the flat molded article obtained above was used! ⁇ The operation was performed in the same manner as in Example 11 to obtain an artificial bone molded article having a human bone shape. Was. Visual inspection of this molded product showed no defects such as voids or keying.
- the powdered product of the present invention can be easily obtained by heating it into a molten orchid state and molding it in a molding die.
- ⁇ the ability to maintain without hardening during the glare.
- the plate-shaped molded article of the present invention can be easily formed into an artificial bone molded article having a relatively large area such as a skull by heating and deforming the molded article along the mold.
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Abstract
Description
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS6168054A (ja) * | 1984-09-10 | 1986-04-08 | 増原 英一 | 人工骨及び人工歯 |
JP2001231848A (ja) * | 2000-02-21 | 2001-08-28 | Nippon Electric Glass Co Ltd | 生体活性セメント組成物 |
JP2004041313A (ja) * | 2002-07-09 | 2004-02-12 | Pentax Corp | リン酸カルシウムブロックを含むリン酸カルシウム−合成樹脂複合体及びその製造方法 |
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2005
- 2005-04-07 WO PCT/JP2005/007197 patent/WO2005097891A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6168054A (ja) * | 1984-09-10 | 1986-04-08 | 増原 英一 | 人工骨及び人工歯 |
JP2001231848A (ja) * | 2000-02-21 | 2001-08-28 | Nippon Electric Glass Co Ltd | 生体活性セメント組成物 |
JP2004041313A (ja) * | 2002-07-09 | 2004-02-12 | Pentax Corp | リン酸カルシウムブロックを含むリン酸カルシウム−合成樹脂複合体及びその製造方法 |
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