WO2007108411A1 - 医用材料 - Google Patents
医用材料 Download PDFInfo
- Publication number
- WO2007108411A1 WO2007108411A1 PCT/JP2007/055377 JP2007055377W WO2007108411A1 WO 2007108411 A1 WO2007108411 A1 WO 2007108411A1 JP 2007055377 W JP2007055377 W JP 2007055377W WO 2007108411 A1 WO2007108411 A1 WO 2007108411A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- medical material
- porosity
- ceramic
- bioabsorbable
- Prior art date
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Classifications
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- 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
- A61L27/28—Materials for coating prostheses
- A61L27/30—Inorganic materials
- A61L27/32—Phosphorus-containing materials, e.g. apatite
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- 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
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- 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
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- A61F2/32—Joints for the hip
-
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- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/04—Metals or alloys
- A61L27/06—Titanium or titanium alloys
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
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- A—HUMAN NECESSITIES
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- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
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- A—HUMAN NECESSITIES
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- A61C8/0012—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy
- A61C8/0013—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the material or composition, e.g. ceramics, surface layer, metal alloy with a surface layer, coating
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- 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
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- 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
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- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
- A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
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- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30062—(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
- A61F2002/30064—Coating or prosthesis-covering structure made of biodegradable material
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- 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
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
- A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
- Y10T428/1317—Multilayer [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
- Y10T428/249987—With nonvoid component of specified composition
- Y10T428/24999—Inorganic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
- Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
Definitions
- Patent Document 2 Actual Fairness 7-41467
- Patent Document 3 Japanese Patent Laid-Open No. 2002-345948
- Patent Document 4 Patent No. 3554349
- Patent Document 5 Japanese Patent Laid-Open No. 2005-95584
- Patent Document 6 WO2003Z35128
- Patent Document 7 JP-A-2005-111255
- Patent Document 8 JP-A-2005-112716
- Patent Document 9 WO2003 / 70291
- Patent Document 10 Patent 3646167
- Titanium metal has excellent properties with less foreign body reaction in vivo than other metals, has no magnetism, has high strength, and is lightweight. In addition, it is widely used as a medical material for implant materials such as artificial joints and substitute bones.
- ceramics made of calcium phosphate compounds are known to have excellent biocompatibility.
- hydroxyapatite, ⁇ -tricalcium phosphate, j8-tricalcium phosphate, etc. are known to bind directly to bone tissue, etc., and are used for bone filling materials such as artificial tooth roots and joints. Used as a material.
- ⁇ -tricalcium phosphate and ⁇ -tricalcium phosphate are absorbed into the body over time and replaced with autologous bone.
- Patent Document 1 discloses a bio-hard tissue-inducing scaffold material in which layers of titanium or titanium-based alloy fibers having a diameter of less than 100 / zm and an aspect ratio of 20 or more are entangled and formed in layers. And it is disclosed that the fiber surface of this scaffold material is coated with a calcium phosphate compound such as hydroxyapatite.
- Patent Document 2 discloses a composite bone filling material comprising a titanium mesh material and a calcium phosphate-based hardened body formed by surrounding the mesh material, and a mesh material having a ceramic fiber force
- a composite bone prosthetic material comprising a calcium phosphate-based hardened body formed by surrounding the mesh material is disclosed.
- alumina fibers and carbon fibers are listed as ceramic fibers
- ⁇ -triphosphate and tetracalcium phosphate are listed as hardened calcium phosphates.
- This composite bone prosthesis material is described as being effective for anchoring due to the invasion of bone tissue, because it does not break apart even if it is mechanically strong and destroyed.
- Patent Document 3 discloses a composite sintered body provided with titanium metal and a porous calcium phosphate compound layer formed on the surface thereof.
- Patent Document 5 discloses a biological implant material in which a coating layer mainly composed of titanium or a titanium alloy is formed on the surface of a calcium phosphate ceramic.
- Patent Document 6 discloses a composite biomaterial having a microporous structure in which the hydroxyapatite, collagen, and alginate forces are also used, and the hydroxyapatite c-axis is oriented along the collagen fibers. .
- This composite biomaterial is described as having excellent biocompatibility and osteoinductivity.
- an implant material having a metal nonwoven fabric strength such as titanium has strength because it is made of metal, but it physically binds to induced bone cells and the like. A period of at least 2 to 3 months will be required until it fully penetrates.
- a first object of the present invention is to combine metal fibers having titanium or titanium alloy strength and calcium phosphate ceramics in a layered manner so that the induction period of cells with high strength is short-layered.
- the second object of the present invention is to provide a new medical material having a multilayered ceramic structure having a structure with a high strength and a short cell induction period.
- the metal nonwoven fabric layer is formed in a cylindrical shape or a column shape, and a ceramic layer is provided on the outer periphery thereof (Claim 4), or the ceramic layer is formed in a cylindrical shape or a column shape, and the outer periphery thereof is formed on the outer periphery.
- a metal non-woven fabric layer is preferably used (Claim 5).
- the second aspect of the medical material of the present invention is provided with a first layer that is also a ceramic ska with a porosity of 0.1 to 10% (low porosity), and adjacent to the first layer. It consists of a second layer of ceramics with a porosity of 11 to 80% (high porosity), and the difference in porosity between the first layer and the second layer is 10 to 80 points. Section 6).
- a medical material at least 2 It is preferable to have one or more first layers (Claim 7).
- the ceramics of the first layer and the second layer it is preferable to use bioabsorbable ceramics or non-bioabsorbable ceramics (claims 8 and 9). Furthermore, bioabsorbable ceramics or non-bioabsorbable ceramics may be used as the first layer ceramic, and bioabsorbable ceramics may be used as the second layer ceramic.
- Ten
- a third aspect of the medical material of the present invention is provided with a cylindrical or columnar metal bar and a bioabsorbable ceramic or biononabsorbable ceramic outer layer provided on the outer periphery thereof. It is characterized (claim 13).
- the medical material of the present invention includes a metal nonwoven fabric layer having a titanium metal fiber force having a side or diameter of 100 / zm or less, and a ceramic layer made of a calcium phosphate compound provided on the surface thereof, this medical material is used.
- the metal nonwoven fabric layer is made of titanium metal fibers having a diameter S of 100 m or less, the cells are reconstructed in a structure similar to that of a living body in the metal nonwoven fabric layer (Claim 1).
- the ceramic layer is a bioabsorbable calcium phosphate compound (Claim 2)
- the ceramic layer is replaced with a living cell after treatment, a metal is not contained in the living body. Only the non-woven fabric layer remains and the cells are reconstructed with a structure close to that of a living body.
- the metal nonwoven fabric layer remains, so that the treatment site can be removed relatively easily by re-operation.
- the second aspect of the medical material of the present invention can maintain an average high strength until cells enter the medical material and are fixed after being implanted in the living body. It can be particularly preferably used as a material for inducing osteoblasts such as artificial bones and bone filling materials (Claim 6).
- the cell induction period is relatively short. It physically binds to the invading cell and is finally absorbed by the cell. Furthermore, when bioabsorbable ceramics are used for the first layer and Z or second layer (Claim 9), the cell induction period is slower than that of bioabsorbable ceramics, but the strength of the medical material should be increased. You can.
- the medical material 10 shown in Fig. La can be used for an artificial tooth root (see Fig. Lb) or an artificial bone (see Fig. Lc). And an outer layer 12 made of a bioabsorbable calcium phosphate compound.
- This support 11 is formed from a metal nonwoven fabric in which metal fibers of titanium or titanium alloy are entangled.
- the diameter of this metal fiber is 100 m or less. However, it may be a rectangle with a side of 100 / z m or less. Furthermore, it may be a polygon with one side of 100 / zm or less.
- the support 11 is molded so that the porosity is 50 to 95%, particularly 80 to 90%. This is because many types of cells prefer to grow and actively adhere to the struts 11 having such a geometrical space structure that also has thin fiber force, and the cells spread throughout the struts. The period for forming the physical connection with the support is shortened.
- the thickness is 0.01 to 1 mm, particularly 0.05 to 0.5 mm, and the diameter of the entire medical material 10 is A content of 0.1 to 10%, particularly 0.2 to 5% is preferable.
- its thickness is 0.01-2mm, especially 0.05-: Lmm, and 0.1mm to the overall diameter of the medical material 10
- the bonding strength necessary for the treatment can be obtained while the column 11 and the outer layer 12 are hardly sheared even when an external force is applied.
- the force S varies depending on the type of bioabsorbable calcium phosphate compound. S, before the ceramic layer is completely replaced with the induced cell, the cell is sufficiently induced in the support 11 and the bond between the support 11 and the cell. Power is obtained.
- the outer layer 12 may be filled with a physiologically active substance or a physiologically active aid that activates living cells.
- the overall diameter is 2 to: LOmm, especially 3 to 6mm. It is preferably formed so as to have a radial force of 40 mm, particularly 10 to 30 mm.
- the coating method is preferably a solution method. Any thickness can be coated by using the solution method
- the strut 16 can be used as an artificial tooth root (see FIG. Lc) or an artificial bone, like the strut 11 in FIG. Moreover, the size is substantially the same as the column 11 in FIG. [0038]
- the non-bioabsorbable outer layer 17 is composed of a non-bioabsorbable calcium phosphate compound such as hydroxyapatite.
- the outer layer 17 has holes with a diameter of 50 to 500 111, particularly 200 to 400 m, and is formed so that the porosity is 50 to 80%, particularly 50 to 60%.
- the outer layer 17 is not absorbed by the living body and is integrated with the bone. Therefore, the induction of cells is slower than that of the medical material 10 in FIG. 1, but the strength after the operation is increased. However, even for non-absorbing ceramics, the outer layer is absorbed and replaced over time. Furthermore, the medical material 15 having the outer layer 17 is less likely to cause shearing between the support column 16 and the outer layer 17 in the same manner as the medical material 10 in FIG. 1, and provides a bond strength between the medical material and the living body. .
- the medical material 20 shown in Fig. 2a is obtained by reversing the strut of the medical material 10 and the material of the outer layer of Fig. La, and is formed on the outer periphery of the strut 21 having a bioabsorbable calcium phosphate compound force.
- the outer layer 22 also has a titanium web force.
- the bioabsorbable support 21 also has a bioabsorbable calcium phosphate compound power such as ⁇ -tricalcium phosphate, ⁇ -tricalcium phosphate, and tetracalcium phosphate.
- struts 21 I or, ⁇ Ka 50 to 500 mu m in particular, has a mosquito larva's 200 to 400 mu m, porosity force 50 to 95 0/0, formed so as to be 50-80% in Japanese Has been.
- the post 21 when the post 21 is used as an artificial tooth root (see FIG. 2d), the post 21 has a diameter of 2 to: LOmm, particularly 3 to 6 mm, and the diameter of the post 21 is equal to the entire diameter of the medical material 20.
- the force strut 21 has a diameter of 5 to 40 mm, especially 10 to 30 mm, depending on the bone part used. It is preferable that it is ⁇ 50%, particularly 20 to 30%.
- the outer layer 22 is made of a metal nonwoven fabric in which metal fibers of titanium or titanium alloy having a diameter of 100 ⁇ m or less are entangled, and the porosity of the column is 50 to 95%, preferably 80 to 90%. It is.
- the thickness of the outer layer 22 is, for example, 1 to 10 mm, particularly 1 to 6 mm, most preferably 1 to 2 mm when used as an artificial tooth root (see FIG. 2 d).
- the thickness is preferably 10 to 50%, more preferably 10 to 30% with respect to the overall diameter of the medical material 20.
- the thickness is 1 to: LOmm, especially 1 to 6 mm, and 5 to 50%, especially 5 to 30% of the total diameter of the medical material 20 The one that becomes is preferable.
- the cell first expands in the outer layer 22 and binds to the outer layer 22.
- the cells that have reached the support column 21 through the outer layer 22 bind to the support column 21.
- the struts 21 are replaced by bone cells, only the cylindrical outer layer 22 having a titanium web force remains as a strength reinforcing material. This outer layer 22 may be removed after treatment or left depending on the treatment situation.
- Such a medical material 20 is used as an artificial tooth root or an artificial bone of an elderly person or the like where it is difficult to induce cells, so that even if the density of the bone cells guided and replaced in the support column is low, the outer layer 22 Preferred because the whole is reinforced.
- the medical material 25 shown in FIG. 2b includes a support 26 that also has a bioabsorbable calcium phosphate compound force and an outer layer 27 that also has a titanium web force formed on the outer periphery thereof.
- the non-bioabsorbable strut 26 has a non-bioabsorbable phosphate strength such as hydroxyapatite.
- pillar 26 has a diameter of 50-500 micrometers, especially 200-400 micrometers, and is formed so that the porosity may be 50-80%, especially 50-60%.
- the post 26 when used as an artificial tooth root (see FIG. 2d), the post 26 has a radial force of ⁇ to 10 mm, particularly 3 to 6 mm, and the diameter of the post 26 is equal to the overall diameter of the medical material 25. On the other hand, it is preferably 10 to 50%, particularly 20 to 30%.
- the force strut 26 has a diameter of 5 to 40 mm, specially 10 to 30 mm, and the diameter of the entire medical material 25 10 to 50 0/0 against, especially [this, is made with 20-30% preferred.
- This outer layer 27 is entangled with titanium or titanium alloy metal fibers having a diameter of 100 m or less. It is molded from a non-woven metal fabric having a porosity of 50 to 95%, preferably 80 to 90%.
- the thickness of the outer layer 27 is, for example, 0.5-5 mm, especially 0.5-2 mm, and the diameter of the entire medical material 25 when used as an artificial tooth root (see FIG. 2d). 10 to 50%, especially 20 to 30% is preferable. When used as an artificial bone (see Fig. 2e), the thickness is 5 to 40 mm, especially 10 to 30 mm, and 10 to 50%, especially 20 to 30% of the total diameter of the medical material 25. Is preferred.
- this medical material 25 As an artificial tooth root or an artificial bone and making it difficult for the elderly to induce the target cells, the density of bone cells induced in the support column is reduced as in the case of the medical material 20.
- the entire structure is reinforced by the outer layer 22, which is preferable.
- the strut is not replaced with bone having a low bone density, so that the strength is higher.
- a plurality of passages 23 for communicating the outside with the struts 21 may be provided in the outer layer 22 in Fig. 2a.
- the cells to be induced reach the support column 21 through the passage 23, and a connection with the support column 21 is first formed. Thereafter, cells expand from the outer periphery of the passage 23 and the support column 21 into the outer layer 22 to form a bond between the cell and the outer layer 22.
- This passage 23 may be provided in the outer layer 27 of the medical material 25 in FIG. 2b.
- the medical material 30 of Fig. 3a includes a cylindrical inner layer 31 made of a titanium web, an outer layer 32 made of a bioabsorbable calcium phosphate compound formed on the outer periphery of the inner layer, and a rod 33 inserted into the inner layer. Become power.
- the inner layer 31 of the medical material 30 is molded from a metal nonwoven fabric entangled with a metal fiber of titanium or titanium alloy having a diameter of 100 ⁇ m or less, and the porosity thereof is 50 to 95%, preferably 80 to 90%.
- the thickness of the inner layer 31 is, for example, when used as an artificial tooth root (see FIG. 3c), 2 to: LOmm, particularly 3 to 6 mm, and 10 to 50% of the total diameter of the medical material 30; Particularly preferred is 20 to 30%.
- the thickness is 5 to 40mm, especially 10 to 30mm, and 30 It is preferably 10 to 50%, particularly 20 to 30% of the diameter.
- the force of the outer layer 32 varies from 1 to 3 Omm, especially from 1 to 20 mm. diameter [this against and 2 to 20 0/0, especially [this, to become what is preferably 5 to 10 percent! /,.
- the rod 33 is a rod made of stainless steel or titanium, and is for increasing the strength of this medical material.
- a titanium rod because MRI can be examined during treatment.
- this medical material 30 is also used for a person who is relatively slow or difficult to induce cells such as an elderly person, or a site where cells are relatively difficult to induce such as osteoporosis and osteomalacia.
- the diameter of such a rod is 2 to 20 mm, particularly 3 to LOmm, and 5 to 50%, particularly 10 to 20%, of the entire diameter of the medical material 30 is preferable.
- This medical material 30 can also be used for artificial tooth roots (see Fig. 3c) and artificial bones (see Fig. 3d).
- this medical material 30 can be used as an attachment for attaching the rod 33 to the artificial tooth 34.
- the medical material 30 used as the artificial bone is composed of a cylindrical outer layer 32, an inner layer 31, and an outer layer 32 formed in order from the top, and a rod 33 formed so as to project vertically therethrough. By forming and using it, the protruding rod 33 can be placed so as to pierce the bones B1 and B2 that join together, and treatment can be performed while maintaining the strength of the treatment site.
- the outer layer 37 of the medical material 35 is made of a non-bioabsorbable calcium phosphate compound material such as hydroxyapatite and has a diameter of 50 to 500 ⁇ m, particularly 200 to 400 ⁇ m.
- the porosity is 50 to 80%, in particular 50 to 60%.
- the thickness of the outer layer 37 is 1 to 3 mm, particularly 1 to 2 mm, and the diameter of the outer layer 37 is smaller than the overall diameter of the medical material 35. 2 to 20%, especially 5 to 10% is preferable.
- the radial force of the outer layer 37 is 40mm, especially 10-30mm, depending on the bone site used. It is preferable that it is ⁇ 50%, particularly 20 to 30%.
- the bar 38 reinforces the strength of the medical material 35 and is substantially the same as the bar 33 in FIG. 3a.
- this medical material 35 is provided with the bar 38, so that the strength during the treatment can be maintained.
- the outer layer 42 of the medical material 40 is molded from a metal nonwoven fabric in which metal fibers of titanium or titanium alloy having a diameter of 100 ⁇ m or less are entangled. At this time, the porosity of the column is 50 to 95%, preferably 80 to 90%.
- the outer layer 42 preferably has a thickness of 1 to 3 mm, particularly 1 to 2 mm, and 2 to 20%, particularly 5 to 10%, of the entire diameter of the medical material 40.
- the rod 43 of the medical material 40 is substantially the same as the rod 33 of Figure 3a.
- This inner layer 46 is made of a non-bioabsorbable calcium phosphate compound of hydroxyapatite and has a diameter of 50 to 500 ⁇ m, particularly 200 to 400 ⁇ m. 50 to 80 0/0, in particular, those of 50% to 60%.
- the thickness of the inner layer 41 is preferably 2 to: LOmm, particularly 3 to 6 mm (in the case of an artificial tooth root), or 5 to 40 mm, particularly 10 to 30 mm (in the case of an artificial bone). And 2 to 20%, especially 5 to 10% of the total diameter of the medical material 40 (artificial teeth (In the case of roots) or 2 to 20%, particularly 5 to 10% (in the case of human bones) of the entire diameter of the medical material 40 is preferred.
- the medical material of Fig. 5a is used for an artificial joint.
- the artificial joint 50 includes an artificial bone segment 51 and a saucer 52.
- As the artificial bone segment 51 titanium or a titanium alloy is used.
- the artificial bone segment 51 is provided at the upper end of the medical material 10 of FIG. 1 used as an artificial bone attached to the bone B as shown in the figure.
- the artificial joint tray 52 includes a fan-shaped metal substrate 53, a synthetic resin layer 54 provided on the inner surface of the metal substrate, and a metal fiber layer 55 made of a titanium web provided on the outer surface of the metal substrate. And a ceramic layer 56 provided on the outer surface of the metal fiber layer.
- the arrangement of the metal fiber layer 55 and the ceramic layer 56 in FIG. 5 may be reversed. That is, other forms of the human joint tray 52 include a fan-shaped metal substrate 53, a synthetic resin layer 54 provided on the inner surface of the metal substrate, and a ceramic layer 58 provided on the outer surface of the metal substrate. And a metal fiber layer 59 having a titanium web force provided on the outer surface of the ceramic layer.
- the metal fiber layer 59 is formed from a metal nonwoven fabric entangled with titanium or titanium alloy metal fibers having a diameter of 100 m or less, and has a porosity of 50 to 95%, preferably 80 to 90%. Is used.
- the thickness is preferably 1 to 5 mm, particularly 1 to 3 mm.
- the medical material shown in Fig. 6a is used as the bone plate 60.
- This bone plate 60 Includes a metal base 61, a metal fiber layer 62 having a titanium web force provided on the inner surface thereof, and a ceramic layer 63 having a calcium phosphate compound force.
- Examples of the material of the metal substrate 61 include stainless steel, titanium, or titanium alloy having high biocompatibility.
- the thickness is preferably 1 to: LO mm, particularly preferably 1 to 5 mm.
- the metal fiber layer 62 is formed from a metal nonwoven fabric entangled with metal fibers of titanium or titanium alloy having a diameter of 100 m or less, and the porosity is 50 to 95%, preferably 80 to 90%. Is used.
- the thickness is preferably 1 to: LO mm, particularly 1 to 5 mm.
- a bioabsorbable calcium phosphate compound such as 13 tricalcium phosphate is used as the ceramic layer 63
- its diameter is 50 to 500 ⁇ m, in particular 300 to 400 ⁇ m.
- the ceramic layer 63 when a non-bioabsorbable calcium phosphate compound such as hydroxyapatite is used as the ceramic layer 63, the ceramic layer 63 has a diameter of 50 to 500 ⁇ m, particularly 300 to 400 ⁇ m. And the porosity is 20 to 60%, especially 30 to 50% is preferred. The thickness is 1 to: LOmm
- FIG. 6a Another form of the bone plate 60 includes a metal base 61, a ceramic layer 66 made of a calcium phosphate compound provided on the inner surface thereof, and a metal fiber layer 67 also having a titanium web force.
- the metal substrate 61 is substantially the same as that of FIG. 6a.
- the ceramic layer 66 when a bioabsorbable calcium phosphate compound such as ⁇ -tricalcium phosphate, ⁇ -tricalcium phosphate, or tetracalcium phosphate is used, its diameter is 50 to 500 ⁇ m, particularly 300 to 400 has a mosquito larva's mu m, porosity force 70 to 95 0/0, in particular, 8
- the preferred thickness is from 0 to 90%.
- the thickness is 1 to: LOmm, particularly 2 to 5 mm.
- Non-bioabsorbable calcium phosphate such as hydroxyapatite as ceramic layer 66
- it has a diameter of 50 to 500 ⁇ m, especially 300 to 400 ⁇ m, and a porosity of 30 to 50%, particularly 40 to 50%.
- the thickness is 1 to: LOmm, in particular 2 to 5 mm.
- the metal fiber layer 67 is formed from a metal nonwoven fabric entangled with titanium or titanium alloy metal fibers having a diameter of 100 m or less, and has a porosity of 50 to 95%, preferably 80 to 90%. Is used.
- the thickness is preferably 1 to: LOmm, particularly 3 to 5 mm.
- the medical material 70 of Fig. 6b is used as a bone prosthesis material, and is a base material made of a titanium web.
- the substrate 71 is formed from a metal nonwoven fabric in which metal fibers of titanium or titanium alloy having a diameter of 100 m or less are entangled, and a porosity of 50 to 95%, preferably 80 to 90% is used. It is done. The size of the base material 71 is adjusted according to the size of the bone defect or the filling site.
- the coating layer 72 has a diameter of 50 to 500 ⁇ m, particularly 300 to 400 mu has a mosquito larva's m, porosity force 30 to 60 0/0, especially 1 to the thickness of Guso Shi favored those 40 to 50%: LOMM, shaped to particularly be 2 ⁇ 5mm
- a non-bioabsorbable calcium phosphate compound such as hydroxyapatite is used as the covering layer 72
- the diameter is 50 to 500 m, especially 300 to 400 m
- the porosity is 30 to 60%, especially 40 to 50% of the strength S is preferable
- the thickness is 1 to: LOmm, particularly 2 to 5 mm.
- bone cells derived from the periphery of the bone grafting material are combined with the covering layer 72.
- the bone cells spread and reach the base material 71 through the covering layer 72 and bond to the base material 71.
- the arrangement of the materials of the base material 71 and the covering layer 72 may be reversed.
- the diameter is 5 0 to 500 mu m, in particular, has a mosquito larva's 300 to 400 mu m, porosity force 30 to 60 0/0, especially preferred of 40% to 50%.
- the thickness can be arbitrarily adjusted according to the size of the defect or the filling site.
- the base material 71 When a non-bioabsorbable calcium phosphate compound such as hydroxyapatite is used as the base material 71, it has a diameter of 50 to 500 ⁇ m, especially 300 to 400 ⁇ m, and has a porosity power
- the size of the base material 71 which is preferably 30 to 60%, particularly 40 to 50%, is adjusted depending on the size of the bone defect or the filling site.
- the coating layer 72 is formed from a metal nonwoven fabric in which metal fibers of titanium or titanium alloy having a diameter of 100 m or less are entangled, and the porosity is 50 to 95%, preferably 80 to 90. % Is used. Molded so that its thickness is 1 ⁇ : LOmm, especially 2 ⁇ 5mm.
- a medical material 77 shown in FIG. 7 includes a base material 78 and a coat layer 79 provided outside the base material 78.
- the base material 78 is a titanium metal fiber having a substantially rectangular cross section
- the coating layer 79 is a hydroxyapatite that is a non-absorbable ceramic. According to this electron micrograph, it can be seen that the coat layer 79 is uniformly provided around the substrate 78.
- the cross-sectional shape is a circle, and the force mainly disclosed has a diameter S of 100 m or less.
- One side may be 100 / zm or less. Further, it may be a polygon with one side of 100 / z m or less.
- the medical material 80 shown in Fig. 8a can be used for an artificial tooth root (see Fig. 8c) or an artificial bone (see Fig. 8d) and has a porosity of 0.1 to 10% (low porosity) ), Especially 1 to 5% bioabsorbable ceramic support column 81 and the outer periphery formed with a porosity of 11 to 80% (high porosity), especially 50 to 70% bioabsorbable ceramics It has an outer layer 82 that is also powerful. The difference in porosity between the support column 81 and the outer layer 82 is 10 to 80 points.
- Such a medical material support 81 also has a bioabsorbable ceramic force, and its porosity is 0.
- extracellular matrix components such as collagen, fibronectin, and albumin can be induced in the struts, and by inducing extracellular matrix components, cell proliferation and cell Promotes differentiation. Therefore, invite cells into the column. It can be guided and exerts an anchor effect in fixation with a living body. Further, the strength of the entire medical material 80 can be obtained, and after the medical material is implanted in the living body, the medical material is fixed in the living body until cells are induced. That is, by introducing an extracellular matrix component into the support column 81, cells can easily enter the layer 82, and as a whole, the strength can be further increased, and the induction period to the entire support column can be made relatively long. Can be small.
- the outer layer 82 also has bioabsorbable ceramic power, and its porosity is 11 to 80% (high), especially 50 to 70%, and the difference from the porosity of the support is 10 to 80 points.
- the pore diameter is 50 to 500 ⁇ m, in particular 300 to 400 ⁇ m.
- the porosity of the outer layer 82 is the geometrical structure that cells prefer to penetrate. Since the outer layer 82 is formed so that the porosity is 10 to 80 points larger than that of the support column, the outer layer 82 has a role of guiding the cells that have intruded into the outer layer 82 to the support column 81. To prevent shearing between. In addition, cells that physically bond to the outer layer 82 are finally chemically bonded in the same manner as the struts.
- the medical material 80 configured in this manner has sufficient strength, it is not easily displaced or broken even when placed in the living body. Therefore, this medical material is particularly preferred for use as a human tooth root, artificial bone, or bone prosthetic material. Since this medical material 80 is entirely composed of bioabsorbable ceramics, it is completely replaced with the induced bone after inducing osteoblasts and the like.
- the outer layer of the medical material 80 has a higher porosity than the support, the cells that have entered the outer layer 82 are guided in the direction of the support as described above. Therefore, it is possible to induce cells into the medical material 80 at an early stage. Furthermore, the replacement of the osteoblast with the outer layer, the invasion of the osteoblast into the strut, and the replacement with the osteoblast strut are performed in sequence, so that the medical material 80 does not support the strut 81 until the bone is replaced. On average, high strength can be maintained without causing shearing between the outer layer 82 and the outer layer 82.
- bioabsorbable ceramics used for this medical material include ⁇ -tricalcium phosphate, ⁇ -tricalcium phosphate, and the like.
- the same type of struts and outer layers may be used, or different types may be used.
- the surface of the support column 81 and the outer layer 82 may be coated with a physiologically active substance or a physiologically active auxiliary agent that activates living cells!
- physiologically active substances or physiological Examples of the activity assistant include cell growth factor, cytodynamic force in, antibiotics, cell growth regulator, enzyme, protein, polysaccharide, phospholipid, lipoprotein, and mucopolysaccharide. These can promote cell induction.
- This medical material is manufactured by a composite of a plurality of ceramic materials and a non-sintered calcium phosphate, which is not based on a single ceramic material which has been conventionally practiced.
- an outer layer 82 is provided on the outer periphery excluding the upper surface of the support 81, and is inserted into the jaw bone (alveolar bone).
- the jaw bone alveolar bone
- osteoblasts invade from the outer layer 82, the osteoblasts spread into the medical material 80, and the artificial tooth 83 is attached to the upper surface of the support column with the medical material 80 and the osteoblasts sufficiently bonded. It is intended to be fitted with feature 8 4.
- the medical material 80 is replaced with autologous bone, the autologous bone directly supports the asset 84.
- the entire diameter of the medical material 80 is 3 to 30 mm, particularly 4 to 20 mm
- the diameter of the support 81 is 2 to 25 mm, particularly 2 to 20 mm
- the thickness of the outer layer is 0.5 to : LOmm, particularly preferably 1 to 5 mm.
- a force in which the diameter of the support column 81 is 5 to 30%, particularly 10 to 20% with respect to the entire diameter of the medical material 80 is preferable because the entire medical material 80 can be given higher strength.
- a support column is formed so as to be an outer shape or a cylinder of the bone, and an outer layer 82 is formed on the upper and lower surfaces of the support column.
- the medical material (artificial bone) 80 is inserted between the bones Bl and B2 to be joined so that the outer layer 82 is in contact with the bones B 1 and B2.
- osteoblasts are guided from the outer layer 82, joined to the outer layer 82, spread to the strut 81, and are joined to the strut 81.
- early healing is possible, and osteoblasts and the medical material are tightly bound.
- the size of the medical material at this time varies depending on the bone site used.
- the overall height is 1 to 50 mm, particularly 2 to 25 mm, and the height of the column 81 is 1 to 49 mm. In particular, it is preferably 1 to 20 mm, and the thickness of the outer layer is preferably 0.5 to: LO mm, particularly 1 to 5 mm. And it is preferable because the height of the column 81 is 5 to 30%, particularly 10 to 20% with respect to the entire height of the medical material 80, and sufficient strength as a whole can be given.
- the medical material 85 in Fig. 8b has a porosity of 0.1 to 10% (low porosity), particularly 1 to 5%.
- the difference in porosity between the support column 86 and the outer layer 87 is 11 to 80 points.
- This medical material 85 is obtained by making the material of the medical material 80 in FIG. 8a non-absorbable.
- This strut 86 has a porosity of 0.1 to 10% (low), similar to the strut 81 in FIG. 8a, so that the extracellular matrix component can be guided into the strut and is used for medical purposes.
- the strength of the entire material 85 can be obtained.
- the strut 86 so that its diameter is 5-30%, especially 10-20% of the total diameter, the overall strength can be maintained, and the induction period to the entire strut can be compared. Can be made smaller.
- the outer layer 87 has a porosity of 11 to 80% (high), particularly 50 to 70%, similar to the outer layer 82 of Fig. 8a, and the difference from the porosity of the support column is 10 or more.
- the pore diameter is 50 to 500 111, especially 300 to 400 / ⁇ ⁇ . Therefore, it has the geometric structure that cells prefer and actively induces cells.
- the outer layer 87 is formed so that the porosity is 10 to 80 points larger than the column 86, shearing of the column 86 and the outer layer 87 can be prevented, and the cells can be smoothly put into the medical material 85. Can be guided.
- the medical material 85 configured in this manner is not absorbed into the living body and is integrated with the bone after the operation, and thus has high strength immediately after the operation (immediately after implantation of the medical material). For this reason, it is preferably used by people such as the elderly who are relatively slow in inducing cells, those who are difficult, or those with osteoporosis or osteomalacia. However, even non-bioabsorbable ceramics are absorbed and replaced over time. Furthermore, since the medical material 85 also has a two-layer force with a porosity difference of 10 to 80 points, like the medical material 80 in FIG. 8, shearing between the support column 86 and the outer layer 87 is difficult to occur, and the medical material Bond strength between the body and the living body can be obtained.
- bioabsorbable ceramics used for the medical material 85 include hydroxyapatite, alumina, zircoure, carbon, calcium phosphate, and crystallized glass.
- the support 86 and the outer layer 87 may be the same type or different types.
- the surface of the support column 86 and the outer layer 87 has a physiologically active substance that activates living cells in the same manner as the medical material of FIG.
- the overall diameter is 3 to 8 mm, especially 3.5. It is preferable that the diameter of the column 86 is 3 to 5 mm, particularly 3 to 4 mm, and the thickness of the outer layer 87 is 0.2 to 2 mm, particularly 0.5 to 1 mm.
- the diameter of the column 86 is preferably 5 to 20%, more preferably 10 to 15% with respect to the overall diameter of the medical material 85.
- the overall height is 10 to 200 mm, particularly 10 to 150 mm, and the height of the support 86 is 100% of the total height of the medical material 85. It is preferable.
- the medical material 90 shown in Fig. 9a has a porosity of 11 to 80% (high porosity), particularly 50 to 70% of a column 91 having a bioabsorbable ceramic force, and a porosity formed on the outer periphery thereof. And an outer layer 92 having a bioabsorbable ceramic power of 0.1 to 10% (low porosity), particularly 1 to 5%. That is, the porosity of the support column 81 and the outer layer 82 of the medical material 80 in FIG. 8 is reversed.
- the struts 91 have a porosity of 11 to 80% (high), particularly 50 to 70%, and thus have a geometrical structure preferred by the cells, and actively induce the cells.
- the diameter of the child formed on the support column 91 is 50 to 500 ⁇ m, particularly 300 to 400 ⁇ m, and the invader of the osteoblast is preferred.
- the outer layer 92 has a porosity of 0.1 to 10% (low), particularly 1 to 5%, so that cells can be guided into the outer layer and the strength of the medical material 90 as a whole can be given. Can do. Further, since the difference in the porosity between the outer layer 92 and the support column 91 is 10 to 80 points, shearing hardly occurs between the support column 91 and the outer layer 92.
- the diameter of the hole formed in the outer layer 92 is 0.01 to: LO / z m, particularly 0.1 to 5 / ⁇ ⁇ . Further, by forming the outer layer 92 so as to have a thickness of 5 to 20%, particularly 10 to 15% of the total diameter force, the overall strength can be further maintained, and cells to the entire medical material can be maintained. The induction period can be reduced.
- bioabsorbable ceramics examples include ⁇ -tricalcium phosphate, ⁇ -tricalcium phosphate, and the like, similar to the medical material 80 in FIG.
- the support and outer layer may be of the same type or different types.
- the medical material 90 configured as described above has sufficient strength, so that it does not easily shift even when placed in the living body. Since the medical material 90 is composed entirely of bioabsorbable ceramics, the induced osteoblasts are then completely replaced by bone. . Since this medical material is provided with a low porosity layer in the outer layer 92, the cell induction period is slower than that of the medical material 80 in FIG. However, since the strut 91 has a higher binding force with the cell than the outer layer 92, and when the cell is induced, the anchor effect is higher than the medical material 80 of FIG. Similarly to the medical material 80 of FIG. 8, the medical material 90 can maintain an average high strength without causing shearing between the support column 91 and the outer layer 92 until the bone is replaced. Therefore, in consideration of an appropriate induction period and strength of cells, the thickness of the outer layer 92 is preferably 5 to 20%, more preferably 10 to 15%, with respect to the overall diameter of the medical material 90.
- a through-hole 93 that communicates the outside with the support column 91 may be provided in the outer layer 92, like a medical material 99.
- the cell can accelerate the induction period.
- a through hole 93 preferably has a hole diameter of 0.1 to 5 mm, particularly 1 to 3 mm.
- the overall diameter is 3 to 2 Omm, especially 4 to 20 mm, and the diameter of the column 91 is 2 to 25 mm, especially 2 to 2 mm.
- the outer layer 92 has a thickness of 0.5 to: LO mm, particularly 1 to 5 mm.
- the thickness of the outer layer 92 is preferably 5 to 30%, particularly 10 to 20% with respect to the overall diameter of the medical material 90, since the overall strength can be obtained.
- the overall height is 1 to 50 mm, especially 2 to 25 mm, and the height of the column 91 is 1 to 49 mm, especially l to It is preferable that the thickness of the outer layer is 20 mm and the thickness of the outer layer is 0.5 to LOmm, particularly 1 to 5 mm. Also, the overall strength can be obtained by setting the thickness of the outer layer to 5 to 30%, especially 10 to 20% of the overall height of the medical material 90, so U is preferable.
- the medical material 95 shown in Fig. 9b is composed of a support 96 made of non-absorbable ceramics having a porosity of 11 to 80% (high porosity), particularly 50 to 70%, and a void formed on the outer periphery thereof. And an outer layer 97 having a non-bioabsorbable ceramic power with a rate of 0.1 to 10% (low porosity), particularly 1 to 5%.
- the porosity of the column 86 and the outer layer 87 of the medical material 85 in FIG. 8b is reversed.
- the strut 96 has a porosity of 11 to 80% (high), particularly 50 to 70%, and thus has a geometric structure that the cell prefers and actively induces the cell. Also formed on the support 96 The diameter of the child is 50-500 ⁇ m, especially 300-400 ⁇ m, and the invader of the osteoblast is preferred.
- the outer layer 97 has a porosity of 0.1 to 10% (low), cells can be guided into the outer layer, and the strength of the medical material 95 as a whole can be given. Further, since the difference in porosity between the support column 96 and the outer layer 97 is 10 to 80 points, the shearing force S hardly occurs between the support column 96 and the outer layer 97.
- the diameter of the holes formed in the outer layer 97 is 0.1 to: LO / z m, in particular 0.1 to 5 / ⁇ ⁇ . Furthermore, the outer layer 97 is formed so that the thickness of the outer layer 97 is 5 to 20%, particularly 10 to 15% of the entire diameter, thereby giving strength as a whole and comparing the induction period to the whole medical material. Can be made smaller. Further, as shown in FIG. 9c, a through hole 93 may be provided in the outer layer 97.
- non-bioabsorbable ceramics examples include hydroxyapatite, alumina, zircoure, carbon, calcium phosphate crystal and the like, similar to the medical material 85 in FIG. 8b.
- the same type of struts and outer layers can be used, and different types can be used.
- the overall diameter is 3 to 20 mm, especially 4 to 20 mm, and the diameter of the support 96 is 2 to 25 mm, especially 2 to 20 mm.
- the thickness of 97 is preferably 0.5 to: L0 mm, particularly preferably 1 to 5 mm.
- the thickness of the outer layer 97 is preferably 5 to 30%, particularly 10 to 20% with respect to the overall diameter of the medical material 95, since the overall strength can be obtained.
- the overall height is 1 to 5 Omm, especially 2 to 25 mm, and the height of the support 96 is 1 to 49 mm, especially 1 to 20 mm.
- the thickness of the outer layer is preferably 0.5 to: L0 mm, particularly preferably 1 to 5 mm. Further, it is preferable that the thickness of the outer layer is 5 to 30%, particularly 10 to 20% with respect to the total height of the medical material 95, because the overall strength can be obtained.
- the medical material 100 shown in Fig. 10a was formed on the outer periphery of the support column 101 having a porosity of 0.1 to 10% (low porosity), particularly 1 to 5% and also having a bioabsorbable ceramic force. And an outer layer 102 having a porosity of 11 to 80% (high porosity), particularly 50 to 70% and also having non-bioabsorbable ceramic power. The difference in porosity between the support column 101 and the outer layer 102 is 10 to 80 points.
- the strut 101 is substantially the same as the medical material strut 81 of FIG. 8a, and guides cells into the strut while providing strength as a whole medical material. And after induction, it is finally absorbed by the organism.
- the outer layer 102 is substantially the same as the outer layer 87 of the medical material of FIG. 8b, and has a geometric structure that the cell prefers, and actively induces the cell. And it is not absorbed by the living body for a long time. Therefore, it can be used according to a person whose cell induction is relatively slow or difficult.
- the strut 101a has a porosity substantially the same as the medical material strut 91 in Fig. 9a of 11 to 80% (high porosity), especially 50 to A void that is formed from 70% bioabsorbable ceramic and that is substantially the same as the outer layer 97 of the medical material in Fig. 9b so that the outer layer 102a has a difference in porosity of 10 to 80 points with the strut 101a.
- a non-bioabsorbable ceramic force with a rate of 0.1 to 10% (low porosity), particularly 1 to 5% may be formed.
- the medical material 105 shown in Fig. 10c is formed on the outer periphery of the column 106 having a porosity of 0.1 to 10% (low porosity), particularly 1 to 5%, which is a non-bioabsorbable ceramic force. And an outer layer 107 having a bioresorbable ceramic power of 11 to 80% (high porosity), particularly 50 to 70%.
- the difference in porosity between the column 106 and the outer layer 107 is 10 to 80 points.
- the strut 106 is substantially the same as the medical material strut 81 of FIG. 8b, and guides cells into the strut while providing strength as a whole medical material.
- the outer layer 107 is substantially the same as the outer layer 82 of the medical material of FIG. 8a, and has a geometric structure preferred by the cell, and actively induces the cell, while it is not absorbed by the living body for a long time. And it is absorbed by the living body.
- the porosity of the support 106a is substantially the same as the support 86 of the medical material of Fig. 9b is 0.1 to 10% (low porosity), especially It is also substantially the same as the outer layer 92 of the medical material in Fig. 9a so that the non-bioabsorbable ceramic force of 1-5% also forms, and the outer layer 107a has a difference of 10-80 points between the strut 106a and its porosity Bioabsorbable ceramic forces with porosity of 11-80% (high porosity), especially 50-70% may also be formed.
- the medical material 110 shown in Fig. 11a includes a cylindrical or columnar metal bar 111 and an outer layer 112 having a bioabsorbable ceramic force provided on the outer periphery thereof.
- the metal rod 111 also has a high biocompatibility metal force such as stainless steel or titanium. When using a titanium rod here, it is particularly preferable because it can be examined by MRI during treatment. By providing the metal rod 111 in this way, the strength of the medical material can be increased. In addition, sufficient strength can be maintained even when osteoblasts or the like are not sufficiently induced, or even when osteoblasts are induced or their bone density is low. Further, when re-operation is necessary, the metal rod 111 can be easily removed.
- the outer layer 112 has a porosity of 11 to 80%, a special diameter of 50 to 70%, and a pore diameter of 50 to 500 ⁇ m, particularly 300 to 400 / ⁇ m.
- This geometrical structure is the most preferred structure for cells, and cells are actively induced in the outer layer 112.
- the bioabsorbable ceramic of the outer layer 112 include ⁇ -tricalcium phosphate, j8-tricalcium phosphate, and the like.
- the outer layer 112 induces cells, and the metal rod 111 maintains the overall strength.
- the metal rod 111 since the metal rod 111 is used, its strength can be kept high, and the induction of cells such as elderly people with relatively slow or difficult induction of cells, or osteoporosis, osteomalacia, etc. Is used for relatively difficult parts.
- a non-bioabsorbable material having a porosity of 11 to 80%, particularly 50 to 70%, and a pore diameter of 50 to 500 ⁇ m, particularly 300 to 400 ⁇ m Ceramics may be used. Again, the cells are actively guided into the outer layer due to their geometric structure. Examples of such non-bioabsorbable ceramics include hydroxyapatite.
- the medical 1 material 110a shown in Fig. 120b has an inner layer 113 on the outer periphery of the metal rod 111 and also has a bioabsorbable ceramic force with a porosity of 0.1 to 10% (low porosity), particularly 1 to 5%. And an outer layer 114 having a porosity of 11 to 80% (high porosity), particularly 50 to 70% and having a bioabsorbable ceramic force formed on the outer periphery thereof. At this time, the difference in porosity between the inner 113 and the outer layer 114 is 10 to 80 points.
- This 1 lb medical material 110a is a force obtained by inserting a metal rod 111 into a column 81 of the medical material 80 of FIG. 8a.
- the medical material 85 of FIG. 8b, the medical materials 90, 95 of FIG. 9a to 9c, A metal rod may be inserted into the medical material 100, 103, 105, 108 of 99 or FIGS. 10a to 10d.
- the medical material 110 (medical material 110a (imaginary line)) is the same as other medical materials of the present invention. It can be used as an artificial tooth root (see Fig. 1 lc) or an artificial bone (see Fig. 11).
- the medical material of Fig. 12a is used for an artificial joint.
- the artificial joint 120 also acts as a human bone segment 121 and a saucer 122.
- As the artificial bone segment 121 titanium or a titanium alloy is used.
- This artificial bone segment 121 is provided at the upper end of the medical material 70 of FIG. 8 used as an artificial bone attached to the bone B as shown in the figure.
- the artificial joint tray 122 has a fan-shaped or bowl-shaped metal substrate 123, a synthetic resin layer 124 provided on the inner surface of the metal substrate, and a porosity of 1 to 2 provided on the outer surface of the metal substrate. 10% (low
- first layer 125 also having a bioabsorbable ceramic force
- second layer 126 having a porosity of 10 to 80% (high) and having a bioabsorbable ceramic force provided on the outer surface of the first layer.
- the difference in porosity between the first layer and the second layer is 10 to 70 points.
- metal substrate 123 stainless steel or titanium having high biocompatibility is used.
- a synthetic resin layer a synthetic resin such as high molecular polyethylene is slippery with the artificial bone segment 121.
- the thickness is preferably 2 to 20 mm, particularly 5 to 10 mm.
- the first layer 125 has a porosity of 0.1 to 10% (low), particularly 1 to 5%, and a pore diameter of 0.01 to 5 / ⁇ ⁇ , particularly 0.1 to 2 / ⁇ ⁇ is used. Its thickness is 2 ⁇ : LOmm
- it is 2 to 5 mm.
- the second layer 126 has a porosity of 11 to 80% (high), especially 50 to 70%, and has a hole diameter of 50 to 500 111, especially 300 to 400 / ⁇ ⁇ . Be beaten. Its thickness ⁇ 2 to: LOm m, especially 2 to 5 mm.
- the induced osteoblasts bind to the second layer 126, and the first layer passes through the second layer 126. Guided up to 125. Further, since a porosity difference of 10 to 70 points is provided between the first layer 125 and the second layer 126, shearing hardly occurs.
- non-bioabsorbable ceramics may be used as the first layer and the second layer.
- bioabsorbable ceramics or non-bioabsorbable ceramics having a porosity of 1 to 5% (low) may be used as the first layer.
- the second layer may be non-bioabsorbable ceramics with a porosity of 50 to 70% (high) or bioabsorbable ceramics!
- Bioabsorbable ceramics include tricalcium phosphate and ⁇ tricalcium phosphate.
- Examples of non-absorbable ceramics include hydroxyapatite, alumina, zirconia, carbon, calcium phosphate, and crystallized glass.
- the medical material shown in Fig. 13 is used as the bone plate 130.
- This bone plate includes a metal base 131, a first layer 132 that also has a bioresorbable ceramic force of 0.1 to 10% (low) on the inner surface thereof, and an inner surface of the first layer 132.
- the second layer 133 having a porosity of 11 to 80% (high) and also having a bioabsorbable ceramic force.
- the difference in porosity between the first layer 132 and the second layer 133 is 10 to 80 points.
- Examples of the material of the metal material 131 include titanium, titanium alloy, and stainless steel having high biocompatibility, and the thickness thereof is 1 to 10 mm, particularly 2 to 5 mm.
- the first layer 132 has a porosity of 0.1 to 10% (low), particularly 1 to 5%, and a pore diameter of 0.01 to 0.1111, particularly 0.1 to 0.1%. Those with 1 / ⁇ ⁇ are used. Its thickness is l-5mm, especially l-3mm.
- a force having a porosity of 11 to 80% (high), particularly 50 to 70%, and a pore diameter of 0 to 500 m, particularly 300 to 400 m is used. Its thickness is 1 to: LOm m, in particular 2 to 5 mm.
- osteoblasts are guided to the bone plate 130 and combined with the second layer 133. Furthermore, it is combined with the first layer 132 to firmly connect the bones Bl and B2. Eventually, osteoblasts grow between the bones Bl and B2 to form continuous bones.
- This may also be made of non-bioabsorbable ceramics for the first layer 132 and the second layer 133.
- the first layer 132 has a porosity of 0.1 to 10% (low).
- the second layer may be a non-bioabsorbable ceramic with a porosity of 11 to 80% (high), or a bioabsorbable ceramic.
- the medical material 140 in Fig. 13b is used as a bone grafting material, and is provided so as to cover the first layer 141 having a bioresorbable ceramic force with a porosity of 0.1 to 10% and covering the first layer. And a second layer 142 having a bioresorbable ceramic force with a porosity of 11 to 80%.
- the difference in porosity between the first layer 141 and the second layer 142 is 10 to 80 points.
- bioabsorbable ceramics may be used as the first layer and the second layer, and further, the bioabsorbable ceramic having a porosity of 0.1 to 10% (low) as the first layer.
- a non-bioabsorbable ceramic is used, and the second layer is a non-bioabsorbable ceramic having a porosity of 11 to 80% (high), or a bioabsorbable ceramic.
- the medical material 150 in Fig. 14a has a rectangular parallelepiped second layer 151 having a porosity of 11 to 80%, and three voids formed so as to penetrate the second layer 151.
- the force is the same as that of the first layer 152 having a columnar shape of 1 to 10%, and the difference in porosity between the first layer and the second layer is 10 to 80%.
- the second layer 151 is not particularly limited as long as it is a force solid shape in which a rectangular parallelepiped is used as the second layer 151.
- a cylindrical shape is used as the first layer 152, but the three-dimensional shape is not particularly limited as long as it is embedded in the second layer or penetrates the second layer.
- the medical material 155 in Fig. 14b has a rectangular parallelepiped second layer 156 with a porosity of 11 to 80%, and a lattice with a porosity of 0.1 to 10% embedded in the second layer 156.
- the first layer 157 is in the form of a gap, and the difference in porosity between the first layer and the second layer is 10 to 80%.
- FIG. 1 Figs. La and b are cross-sectional views showing an embodiment of the medical material of the present invention, and Fig. 1c is a cross-sectional view when the medical material is used as an artificial tooth root. Id is a cross-sectional view when the medical material is used as an artificial bone.
- FIGS. 2a, 2b, and 2c are cross-sectional views showing other embodiments of the medical material of the present invention
- FIG. 2d is a cross-sectional view when the medical material is used as an artificial tooth root
- Fig. 4 is a cross-sectional view when the medical material is used as an artificial bone.
- FIGS. 3a and 3b are cross-sectional views showing still another embodiment of the medical material of the present invention
- FIG. 3c is a cross-sectional view when the medical material is used as an artificial tooth root
- FIG. It is sectional drawing when the medical material is used as an artificial bone
- FIGS. 4a and 4b are cross-sectional views showing still another embodiment of the medical material of the present invention
- FIG. 4c is a cross-sectional view when the medical material is used as an artificial tooth root
- FIG. FIG. 3 is a cross-sectional view when the medical material is used as an artificial bone.
- FIG. 6a is a cross-sectional view when the medical material of the present invention is used as a bone plate
- FIG. 6b is a cross-sectional view when the medical material of the present invention is used as a bone grafting material.
- FIG. 8a and FIG. 8b are cross-sectional views showing an embodiment of the medical material of the present invention
- FIG. 8c is a cross-sectional view when the medical material is used as an artificial tooth root
- FIG. FIG. 3 is a cross-sectional view when a medical material is used as an artificial bone.
- FIG. 9a, b and c are cross-sectional views showing other embodiments of the medical material of the present invention, respectively, and FIG. 9d is a cross-sectional view when the medical material is used as an artificial tooth root, Fig. 4 is a cross-sectional view when the medical material is used as an artificial bone.
- FIGS. 10a, b, c, and d are cross-sectional views showing still other embodiments of the medical material of the present invention.
- FIGS. L la and b are cross-sectional views showing still another embodiment of the medical material of the present invention.
- FIG. 11c is a cross-sectional view when the medical material is used as an artificial tooth root
- FIG. Id is a cross-sectional view when the medical material is used as an artificial bone.
- FIG. 13a is a cross-sectional view when the medical material of the present invention is used as a bone plate.
- 6b is a cross-sectional view when the medical material of the present invention is used as a bone grafting material.
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Abstract
Description
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JP2008506277A JPWO2007108411A1 (ja) | 2006-03-17 | 2007-03-16 | 医用材料 |
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JP2010279653A (ja) * | 2009-06-08 | 2010-12-16 | Makoto Hirota | 人工歯根 |
JP2011526809A (ja) * | 2008-07-02 | 2011-10-20 | ジマー デンタル, インコーポレイテッド | 多孔質部を固定するための構造を備えたインプラント |
WO2012063906A1 (ja) * | 2010-11-10 | 2012-05-18 | 三菱マテリアル株式会社 | 多孔質インプラント素材 |
WO2012063907A1 (ja) * | 2010-11-10 | 2012-05-18 | 三菱マテリアル株式会社 | 多孔質インプラント素材 |
JP2015146890A (ja) * | 2014-02-06 | 2015-08-20 | 呂路可 | 骨接合材 |
JP2016540605A (ja) * | 2013-12-20 | 2016-12-28 | アドラー・オルト・ソシエタ・ア・レスポンサビリタ・リミタータAdler Ortho S.R.L. | 人工膝関節用大腿骨コンポーネント |
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JP2016540605A (ja) * | 2013-12-20 | 2016-12-28 | アドラー・オルト・ソシエタ・ア・レスポンサビリタ・リミタータAdler Ortho S.R.L. | 人工膝関節用大腿骨コンポーネント |
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Also Published As
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US20100009103A1 (en) | 2010-01-14 |
EP1997521A4 (en) | 2012-09-12 |
JPWO2007108411A1 (ja) | 2009-08-06 |
EP1997521A1 (en) | 2008-12-03 |
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