WO2014203566A1 - 生体用インプラント - Google Patents
生体用インプラント Download PDFInfo
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- WO2014203566A1 WO2014203566A1 PCT/JP2014/055448 JP2014055448W WO2014203566A1 WO 2014203566 A1 WO2014203566 A1 WO 2014203566A1 JP 2014055448 W JP2014055448 W JP 2014055448W WO 2014203566 A1 WO2014203566 A1 WO 2014203566A1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
- C25D11/02—Anodisation
- C25D11/30—Anodisation of magnesium or alloys based thereon
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- 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 or setting implements
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
-
- 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
- A61L27/02—Inorganic materials
- A61L27/04—Metals or alloys
- A61L27/047—Other specific metals or alloys not covered by A61L27/042 - A61L27/045 or A61L27/06
-
- 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
- A61L27/306—Other specific inorganic materials not covered by A61L27/303 - A61L27/32
-
- 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
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/58—Materials at least partially resorbable by the body
-
- 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
-
- 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/08—Materials for coatings
- A61L31/082—Inorganic materials
- A61L31/086—Phosphorus-containing materials, e.g. apatite
-
- 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/08—Materials for coatings
- A61L31/082—Inorganic materials
- A61L31/088—Other specific inorganic materials not covered by A61L31/084 or A61L31/086
-
- 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L31/148—Materials at least partially resorbable by the body
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C23/00—Alloys based on magnesium
- C22C23/06—Alloys based on magnesium with a rare earth metal as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/07—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing phosphates
- C23C22/08—Orthophosphates
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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
- A61L2420/00—Materials or methods for coatings medical devices
- A61L2420/02—Methods for coating medical devices
-
- 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
- A61L2430/00—Materials or treatment for tissue regeneration
- A61L2430/02—Materials or treatment for tissue regeneration for reconstruction of bones; weight-bearing implants
Definitions
- the present invention relates to a biological implant.
- Patent Document 1 The trace elements added in Patent Document 1 are zirconium (Zr), molybdenum (Mo), niobium (Nb), tantalum (Ta), titanium (Ti), strontium (Sr), chromium (Cr), manganese (Mn ), Zinc (Zn), silicon (Si), phosphorus (P), nickel (Ni) and iron (Fe).
- the trace element is an element whose standard electrode potential is higher than that of magnesium and lower than that of hydrogen, when it is implanted in a living tissue, it reacts with body fluids and is easily ionized and eluted.
- a trace element is ionized and eluted, there is a problem that magnesium or a magnesium alloy of a base material existing around the element is ionized. That is, when the base material is made of magnesium, there is an inconvenience that elution of magnesium is promoted not only by elution by reaction with the body fluid of the base material itself but also by reaction with ionized trace elements.
- This invention is made
- a ceramic film is provided on the surface of a base material made of magnesium or a magnesium alloy, and the total content of metal elements having a standard electrode potential of ⁇ 2.35 V to 0 V contained in the ceramic film is Provided is a living body implant in which the base material is set to a value that can maintain a desired mechanical strength over the healing period of the living tissue of the implantation destination.
- the ceramic film provided on the surface of the base material comes into contact with the living tissue, decomposes by reaction with the body fluid, and contains the metal Element is ionized.
- metal ions those having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less promote decomposition of magnesium or a magnesium alloy as a base material, but in this embodiment, by suppressing the total content sufficiently low
- the mechanical strength of the base material can be maintained at a desired value until the living tissue of the implant destination is healed. Thereby, it can continue to be supported by the living body implant until the affected part is healed.
- the desired mechanical strength may be a mechanical strength of 85% or more with respect to the mechanical strength before implantation.
- the said total content is 109 ppm or less. By doing so, it is possible to maintain a mechanical strength of about 85% or more even after 90 days have elapsed after implantation in a living tissue.
- the said total content is 99 ppm or less.
- the said total content is 62 ppm or less. By doing so, it is possible to maintain a mechanical strength of about 95% or more even after 90 days have elapsed after implantation in a living tissue.
- the ceramic film may contain magnesium and oxygen as the first main component and the second main component.
- the metal element is at least one metal element selected from Nd, Sm, Dy, Gd, Al, V, Zr, Mn, Zn, Cr, Fe, Ni, Sn, and Pb. May be.
- membrane may be produced
- a wet process may be sufficient as the said film
- the content of metal elements having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less can be accurately controlled by controlling the content of metal elements in the chemical solution in which the base material is immersed in the film forming process. It can be controlled well.
- the film generation treatment step may be an anodic oxidation treatment.
- a chemical conversion treatment may be sufficient as the said film
- a base material made of magnesium or a magnesium alloy can be maintained so as not to be rapidly decomposed for a predetermined period after implantation.
- FIG. 3 is a table showing the total content of metal elements having a standard electrode potential of ⁇ 2.35 V to 0 V, contained in the ceramic film of the sample of FIG. It is a figure which shows the relationship between elapsed time and intensity
- the biological implant 1 includes a base material 2 made of magnesium or a magnesium alloy and a ceramic film 3 formed on the surface of the base material 2 as shown in FIG.
- the ceramic film 3 is made of a material in which the total content of elements having a standard electrode potential of ⁇ 2.35 V to 0 V is suppressed to a predetermined amount or less.
- the elements ionized in contact with the body fluid promote the ionization of the base material 2 magnesium or magnesium alloy. That is, as the total content of the above elements increases, the base material 2 is easily corroded, and the mechanical strength decreases. Therefore, in this embodiment, the total content of the above elements is set to a value that allows the base material 2 to maintain a desired mechanical strength over a predetermined period after implantation.
- the living body implant 1 is implanted as a living tissue in a fractured part of a bone tissue as an example, and the period until the fractured part is healed, that is, the autologous bone of the fractured part is Over the period until it is repaired, the base material 2 is set to a total content that can maintain a mechanical strength of 85% or more of the mechanical strength immediately after implantation.
- the period until autologous bone at the fractured part is repaired is about 90 days according to Gurlt, although there are individual differences. That is, it is not preferable that the mechanical strength of the living body implant 1 suddenly decreases for about 90 days until the fracture is healed, and it is desirable that the mechanical strength is maintained at 85% or more.
- the ceramic film 3 is an anodized film that is formed by anodizing treatment performed after forming the base material 2 with oxygen and magnesium as the first main component and the second main component.
- the ceramic provided on the surface of the base material 2 as an affected part of the living tissue, for example, when implanted in a fractured part of the bone tissue.
- the coating 3 first contacts the body fluid and protects the magnesium or magnesium alloy constituting the base material 2 so as to suppress corrosion. Since the ceramic coating 3 also contains a trace amount of metal elements having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less, these metal elements are decomposed and ionized with the body fluid.
- the biological implant 1 since the total content of the above elements is limited, ionization of the magnesium or magnesium alloy of the base material 2 is not promoted by the ionized metal element. Limited. As a result, even if the base material 2 is decomposed by corrosion, its speed is limited to such an extent that the mechanical strength decreases within a range of 15% or less from immediately after implantation even after 90 days have elapsed after implantation. The load applied to the fracture portion is firmly supported by the living body implant 1.
- the magnesium or magnesium alloy implant may be rapidly degraded due to the progress of decomposition.
- the Young's modulus of magnesium or magnesium alloy is close to the Young's modulus of autologous bone, even if it coexists with autologous bone in the medium to long term, the physical load on the autologous bone due to the implant is low. Therefore, problems such as re-fracture due to the implant are unlikely to occur, so that the decomposition progresses slowly and the bone tissue can be safely restored.
- the ceramic film 3 made of the generated anodized film is firmly bonded to the base material 2 by a chemical reaction and is difficult to physically peel off. As a result, corrosion resistance is improved, and peeling after implantation can be prevented.
- FIG. 2 shows the difference between the analysis results of the samples A, B, and C (sample analysis result ⁇ base material analysis result) from the analysis result of the base material 2 together with the detected metal element and its standard electrode potential.
- Three samples A, B, and C were obtained by anodizing using a solution containing ammonium ions and phosphate ions, using WE43 in ASTM standard as a base material 2, respectively.
- the electrode material was made of pure magnesium, and it was prepared by changing the purity of the solution.
- WE43 is an Mg—Y—RE—Zr alloy.
- each sample A, B, and C the total content of metal elements having a standard electrode potential of ⁇ 2.35V to 0V is shown in FIG. Specifically, these metal elements are selected from Nd, Sm, Dy, Gd, Al, V, Zr, Mn, Zn, Cr, Fe, Ni, Sn, and Pb in a range surrounded by a broken line in FIG. At least one metal element.
- FIG. 4 shows the relationship between elapsed time and mechanical strength when each sample A, B, C is immersed in a simulated body fluid (PBS ( ⁇ ) solution: 37.0 ° C.).
- PBS ( ⁇ ) solution 37.0 ° C.
- a bending strength was measured by performing a three-point bending test according to JIS Z 2248 at 30 days, 60 days and 90 days after the immersion.
- the total content of metal elements having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less is the smallest in Sample A at 62.25 ppm, and the bending strength after 90 days has also decreased by about 4%.
- the total content of Sample B is 99.35 ppm, and the decrease in bending strength is about 9%.
- the total content of Sample C is the largest at 109.61 ppm, and the decrease in bending strength is about 13%.
- the bending strength after 90 days from the initial stage of implantation is 85% or more by setting the total content of metal elements having a standard electrode potential of ⁇ 2.35 V to 0 V to 109 ppm or less.
- the bending strength after 90 days from the initial stage of implantation can be increased to 90% or more, and by setting the total content to 109 ppm, 90 days from the initial stage of implantation. It can be seen that the subsequent bending strength can be 95% or more.
- WE43 is adopted as the base material 2, but instead of this, alloys classified as AE42, AM60, AS41, AZ31, EZ33, M1, QE22, ZE41, ZK51 in the ASTM standard. Either of these may be adopted. These alloys have a relatively low total content of metal elements having a standard electrode potential of ⁇ 2.35V to 0V. Even when these films are subjected to a film forming treatment as in this embodiment, the amount of metal elements having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less derived from the alloy mixed into the formed ceramic film is suppressed.
- the biomedical implant has a high corrosion resistance.
- generated by the anodic oxidation process was illustrated as the ceramic film 3, it replaces with this and the film
- a crystalline phase of magnesium phosphate may be formed on the surface of the base material 2 by immersing the base material 2 made of pure magnesium in a high purity (5 mol / L) phosphoric acid solution.
- the total content of metal elements having a standard electrode potential of ⁇ 2.35 V or more and 0 V or less is 39.6 ppm, and the three-point bending strength after 90 days after immersion in PBS is 95.2% immediately after immersion. Was maintained.
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Abstract
Description
この特許文献1で添加される微量元素は、ジルコニウム(Zr)、モリブデン(Mo)、ニオビウム(Nb)、タンタル(Ta)、チタニウム(Ti)、ストロンチウム(Sr)、クロム(Cr)、マンガン(Mn)、亜鉛(Zn)、珪素(Si)、リン(P)、ニッケル(Ni)および鉄(Fe)のうちから選択されるものである。
本発明の一態様は、マグネシウムまたはマグネシウム合金からなる母材の表面に、セラミックス皮膜を備え、該セラミックス皮膜に含まれる-2.35V以上0V以下の標準電極電位を有する金属元素の総含有量が、埋植先の生体組織の治癒期間にわたって、前記母材が所望の機械的強度を保持可能な値以下に設定されている生体用インプラントを提供する。
このようにすることで、患部が治癒するまで生体用インプラントの機械的強度を十分に確保することができ、患部を支持し続けることができる。
このようにすることで、生体組織への埋植後90日経過しても約85%以上の機械的強度を維持することができる。
このようにすることで、生体組織への埋植後90日経過しても約90%以上の機械的強度を維持することができる。
このようにすることで、生体組織への埋植後90日経過しても約95%以上の機械的強度を維持することができる。
また、上記態様においては、前記金属元素が、Nd、Sm、Dy、Gd、Al、V、Zr、Mn、Zn、Cr、Fe、Ni、Sn、Pbから選ばれる少なくとも1種類の金属元素であってもよい。
このようにすることで、セラミックス皮膜として、成形加工時に形成される皮膜や大気接触による自然酸化によって形成されるものを除き、母材の成形後の皮膜生成処理により、特定金属元素の含有量を低減させたセラミックス皮膜を形成することができる。
このようにすることで、皮膜生成処理工程において母材を浸漬する薬液中の金属元素含有量を制御することにより、-2.35V以上0V以下の標準電極電位を有する金属元素の含有量を精度よく制御することができる。
このようにすることで、生成されるセラミックス皮膜と母材との接着強度を向上することができ、物理的な皮膜剥がれを防止して耐食性を向上することができる。
このようにすることで、酸処理等の化成処理において使用する薬液として高純度のものを使用することができ、製造管理し易く、より安定的に耐食性を向上することができる。
本実施形態に係る生体用インプラント1は、図1に示されるようにマグネシウムまたはマグネシウム合金からなる母材2と、該母材2の表面に形成されたセラミックス皮膜3とを備えている。
859-877」によれば、ポリ乳酸製の骨接合材料を擬似体液(PBS)に浸漬した場合の曲げ強度試験の結果、約90日後に初期強度から16%低下したことが報告されている。上記文献からポリ乳酸の初期曲げ強度は270MPaと報告されている。一方、マグネシウム合金によれば初期曲げ強度は400MPa以上であり、少なくともポリ乳酸と同等の分解速度、すなわち、埋植初期から15%以下の機械的強度の低下であれば、ポリ乳酸よりも高い初期曲げ強度を有している分、ポリ乳酸製の既存の骨接合材が使用されている治療範囲以上の、荷重負荷への耐久が求められる骨接合治療にも適用することができる。
3つの試料A,B,Cは、それぞれASTM規格におけるWE43を母材2として、アンモニウムイオンおよびリン酸イオンを含む溶液を用いて陽極酸化処理を行って得られたものであり、混入元素とその量を制御するために電極材料を純マグネシウムとし、溶液の純度を変更することにより作成した。ここで、WE43はMg-Y-RE-Zr合金である。
これらの合金は、-2.35V以上0V以下の標準電極電位を有する金属元素の総含有量が比較的少ないものである。これらの合金に、本実施形態のように皮膜生成処理を行っても、合金由来の-2.35V以上0V以下の標準電極電位を有する金属元素が、形成するセラミックス皮膜に混入する量が抑制され、耐食性が高い生体用インプラントを作製できるという特徴がある。
例えば、純マグネシウムからなる母材2を高純度(5mol/L)のリン酸溶液に浸漬することにより、母材2の表面にリン酸マグネシウムの結晶相を形成してもよい。この場合、-2.35V以上0V以下の標準電極電位を有する金属元素の総含有量は39.6ppmであり、PBSに浸漬後90日経過後の3点曲げ強度は、浸漬直後の95.2%に維持されていた。
2 母材
3 セラミックス皮膜
Claims (11)
- マグネシウムまたはマグネシウム合金からなる母材の表面に、セラミックス皮膜を備え、
該セラミックス皮膜に含まれる-2.35V以上0V以下の標準電極電位を有する金属元素の総含有量が、埋植先の生体組織の治癒期間にわたって、前記母材が所望の機械的強度を保持可能な値以下に設定されている生体用インプラント。 - 前記所望の機械的強度は、埋植前の機械的強度に対して85%以上の機械的強度である請求項1に記載の生体用インプラント。
- 前記総含有量が109ppm以下である請求項2に記載の生体用インプラント。
- 前記総含有量が99ppm以下である請求項3に記載の生体用インプラント。
- 前記総含有量が62ppm以下である請求項4に記載の生体用インプラント。
- 前記セラミックス皮膜が、第1主成分および第2主成分として酸素およびマグネシウムを含有する請求項1から請求項5のいずれかに記載の生体用インプラント。
- 前記金属元素が、Nd、Sm、Dy、Gd、Al、V、Zr、Mn、Zn、Cr、Fe、Ni、Sn、Pbから選ばれる少なくとも1種類の金属元素である請求項1から請求項6のいずれかに記載の生体用インプラント。
- 前記セラミックス皮膜が、母材を成形した後の皮膜生成処理工程において生成されたものである請求項1から請求項7のいずれかに記載の生体用インプラント。
- 前記皮膜生成処理工程が湿式処理である請求項8に記載の生体用インプラント。
- 前記皮膜生成処理工程が陽極酸化処理である請求項9に記載の生体用インプラント。
- 前記皮膜生成処理工程が化成処理である請求項9に記載の生体用インプラント。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP14813436.4A EP3011979A4 (en) | 2013-06-18 | 2014-03-04 | Implant for living organisms |
| CN201480017391.6A CN105050631A (zh) | 2013-06-18 | 2014-03-04 | 活体用植入物 |
| JP2015522587A JPWO2014203566A1 (ja) | 2013-06-18 | 2014-03-04 | 生体用インプラント |
| US14/936,854 US20160060784A1 (en) | 2013-06-18 | 2015-11-10 | Biological implant |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013127507 | 2013-06-18 | ||
| JP2013-127507 | 2013-06-18 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US14/936,854 Continuation US20160060784A1 (en) | 2013-06-18 | 2015-11-10 | Biological implant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014203566A1 true WO2014203566A1 (ja) | 2014-12-24 |
Family
ID=52104312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2014/055448 Ceased WO2014203566A1 (ja) | 2013-06-18 | 2014-03-04 | 生体用インプラント |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20160060784A1 (ja) |
| EP (1) | EP3011979A4 (ja) |
| JP (1) | JPWO2014203566A1 (ja) |
| CN (1) | CN105050631A (ja) |
| WO (1) | WO2014203566A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015119893A (ja) * | 2013-12-25 | 2015-07-02 | 堤総研株式会社 | 生体器具 |
| WO2015186390A1 (ja) * | 2014-06-03 | 2015-12-10 | オリンパス株式会社 | 骨接合用インプラント |
| CN106999284A (zh) * | 2014-12-25 | 2017-08-01 | 奥林巴斯株式会社 | 骨接合用植入物及其制造方法 |
| CN107217185A (zh) * | 2017-06-03 | 2017-09-29 | 郑州汉东科技有限公司 | 一种可降解医学植入物 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103328015B (zh) * | 2011-01-24 | 2016-01-06 | 奥林巴斯株式会社 | 生物降解性移植材料及其制造方法 |
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| JP2009535504A (ja) * | 2006-04-28 | 2009-10-01 | バイオマグネシウム システムズ リミテッド | 生分解性マグネシウム合金およびその使用 |
| JP2010503509A (ja) * | 2006-09-22 | 2010-02-04 | ユー アンド アイ コーポレーション | 生体分解性金属を含むインプラントおよびその製造方法 |
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- 2014-03-04 EP EP14813436.4A patent/EP3011979A4/en not_active Withdrawn
- 2014-03-04 WO PCT/JP2014/055448 patent/WO2014203566A1/ja not_active Ceased
- 2014-03-04 JP JP2015522587A patent/JPWO2014203566A1/ja active Pending
- 2014-03-04 CN CN201480017391.6A patent/CN105050631A/zh active Pending
-
2015
- 2015-11-10 US US14/936,854 patent/US20160060784A1/en not_active Abandoned
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015119893A (ja) * | 2013-12-25 | 2015-07-02 | 堤総研株式会社 | 生体器具 |
| WO2015186390A1 (ja) * | 2014-06-03 | 2015-12-10 | オリンパス株式会社 | 骨接合用インプラント |
| CN106999284A (zh) * | 2014-12-25 | 2017-08-01 | 奥林巴斯株式会社 | 骨接合用植入物及其制造方法 |
| CN107217185A (zh) * | 2017-06-03 | 2017-09-29 | 郑州汉东科技有限公司 | 一种可降解医学植入物 |
| CN107217185B (zh) * | 2017-06-03 | 2021-02-12 | 西南医科大学 | 一种可降解医学植入物 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3011979A1 (en) | 2016-04-27 |
| JPWO2014203566A1 (ja) | 2017-02-23 |
| EP3011979A4 (en) | 2017-02-15 |
| US20160060784A1 (en) | 2016-03-03 |
| CN105050631A (zh) | 2015-11-11 |
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