JP6522773B2 - ウォラストナイト、ヒドロキシアパタイト及びオケルマナイトを含む高強度結晶化ガラスセラミック - Google Patents
ウォラストナイト、ヒドロキシアパタイト及びオケルマナイトを含む高強度結晶化ガラスセラミック Download PDFInfo
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- 239000002241 glass-ceramic Substances 0.000 title claims description 51
- 229910052588 hydroxylapatite Inorganic materials 0.000 title claims description 38
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 title claims description 38
- 239000010456 wollastonite Substances 0.000 title claims description 24
- 229910052882 wollastonite Inorganic materials 0.000 title claims description 24
- RBNCTJWRWOMIBO-UHFFFAOYSA-N dicalcium;magnesium;trihydroxy(trihydroxysilyloxy)silane Chemical compound [Mg+2].[Ca+2].[Ca+2].O[Si](O)(O)O[Si](O)(O)O RBNCTJWRWOMIBO-UHFFFAOYSA-N 0.000 title description 5
- 210000000988 bone and bone Anatomy 0.000 claims description 62
- 125000006850 spacer group Chemical group 0.000 claims description 43
- 239000000463 material Substances 0.000 claims description 41
- 229910004762 CaSiO Inorganic materials 0.000 claims description 24
- 229910014497 Ca10(PO4)6(OH)2 Inorganic materials 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 9
- 239000006112 glass ceramic composition Substances 0.000 claims description 9
- 229910001720 Åkermanite Inorganic materials 0.000 claims description 9
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- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910004261 CaF 2 Inorganic materials 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 2
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical group [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
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- 208000003618 Intervertebral Disc Displacement Diseases 0.000 description 1
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- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
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- NWXHSRDXUJENGJ-UHFFFAOYSA-N calcium;magnesium;dioxido(oxo)silane Chemical compound [Mg+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O NWXHSRDXUJENGJ-UHFFFAOYSA-N 0.000 description 1
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- IUMKBGOLDBCDFK-UHFFFAOYSA-N dialuminum;dicalcium;iron(2+);trisilicate;hydrate Chemical compound O.[Al+3].[Al+3].[Ca+2].[Ca+2].[Fe+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] IUMKBGOLDBCDFK-UHFFFAOYSA-N 0.000 description 1
- 229910052637 diopside Inorganic materials 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000010433 feldspar Substances 0.000 description 1
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- 229910052587 fluorapatite Inorganic materials 0.000 description 1
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- 229910052610 inosilicate Inorganic materials 0.000 description 1
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- 206010025005 lumbar spinal stenosis Diseases 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
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- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
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- A61L27/02—Inorganic materials
- A61L27/12—Phosphorus-containing materials, e.g. apatite
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
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Description
粉末形態のSiO2、ヒドロキシアパタイト、Ca(OH)2, MgO, B2O3, CaF2などを1400℃以上の高温で2時間以上煮沸した後、水の中で急冷してガラス粉末原料を製造した。各原料はSiO225〜35重量%、ヒドロキシアパタイト25〜35重量%、Ca(OH)218〜22重量%、 MgO4〜6重量%、B2O34〜5重量%、CaF24〜5重量%の比率で混合した。前記製造したガラス粉末を当業界で公知となった一般セラミック成形体の製造方法と同様の方法で成形した後、高温焼結して結晶化した。最終結晶化により得られた結晶相(crystalline phase)は、ウォラストナイト、ヒドロキシアパタイト及びオケルマナイトが類似の比率で混合されていた。これをX−線回折パターンを通じて分析し、その結果を図1に示した。具体的に、各物質の主回折線である2θはウォラストナイトの場合、29.5〜30.5°、ヒドロキシアパタイトの場合、31.5〜32.5°及びオケルマナイトの場合、30.5〜31.5°の範囲であり、強度の比率はそれぞれ36±5%、33±5%及び31±5%範囲であった。
ウォラストナイト、ヒドロキシアパタイト、オケルマナイトの結晶化のための最適の焼結温度を決定するために、同じ組成のガラス粉末をそれぞれ異なる温度で焼結して、ガラスセラミックを製造し強度を確認した。温度によるガラス粉末焼結の傾向を見ると、約700℃で焼結が進行され、前記温度で2時間焼結を進行する場合、約5%の収縮が起こった。750〜800℃で焼結した場合は、ガラス粉末の結晶化が急激に進行され、線形収縮率(linear shrinkage rate)が18〜21%の水準に達した。しかし、750℃の場合、焼結は良い反面、ウォルラストナイトの結晶化は起こらなかった。一方、800℃で焼結する場合、結晶化の中断による製品の破損が起こることが確認された(図2)。したがって、これは前記温度範囲が製品生産のための焼結に不適切であることを示すものである。温度をさらに増加させて900℃以上で焼結する場合、ウォラストナイトの結晶化が起こり、製品の破損もない安定的な焼結が進行されることを確認した。この後、温度をさらに増加させて1100℃まで同様の結晶相が存在し、これは該当範囲までの温度が焼結に適切な温度であることを示す。ただし、工程の効率性を考慮すると、結晶によるXRD回折線半価幅が大きく減る1000℃が最適の焼結温度であり得る(図3)。
本発明に係る所定の比率でウォラストナイト、ヒドロキシアパタイト及びオケルマナイトを含む高強度の結晶性ガラスセラミックを含む骨移植材の強度を測定して、既存のガラスセラミックの素材であるウォラストナイト/HA複合体及び生体セラミック焼結体であるHAに対する値と比較した。
前記本発明に係る高強度結晶化ガラスセラミックの素材を加工して、脊椎スペーサーを製造するが、圧縮強度が3,000N以上になるようにして頸椎(cervical)用途の脊椎スペーサーを製造することができ、8,000N以上になるようにして腰椎(lumbar)用途の脊椎スペーサーを製造することができる。すなわち、前記実施例2で確認したように、本発明に係る高強度結晶化ガラスセラミックの素材は、〜1321MPaの圧縮強度を示すため、理論的に、それぞれ2.27mm2と6.06mm2の大きさで製造する場合、前記頚椎及び腰椎の用途の脊椎スペーサーとしての要件を満たすことができており、一般的な脊椎スペーサーが数mmから数cmの長さ、幅及び/または高さを有することを考慮すると、本発明の結晶化ガラスセラミックの素材は、前記提示された頚椎及び腰椎用途の脊椎スペーサーとして要求される強度を満たし得ることを確認した。
(構成1)
CaSiO 3 、Ca 10 (PO 4 ) 6 (OH) 2 及びCa 2 Mg(Si 2 O 7 )をそれぞれ30〜40重量%で含む、結晶化ガラスセラミック。
(構成2)
CaSiO 3 がウォラストナイト(Wollastonite)であり、Ca 10 (PO 4 ) 6 (OH) 2 がヒドロキシアパタイト(hydroxyapatite; HA)であり、Ca 2 Mg(Si 2 O 7 )がオケルマナイト(Akermanite)である、構成1に記載の結晶化ガラスセラミック。
(構成3)
CaSiO 3 及びCa 10 (PO 4 ) 6 (OH) 2 を含むガラスセラミックに比べてCa 2 Mg(Si 2 O 7 )をさらに含むことにより増加された強度を有するものである、構成1に記載の結晶化ガラスセラミック。
(構成4)
850〜1100℃の温度で焼結して形成したものである、構成1に記載の結晶化ガラスセラミック。
(構成5)
CaSiO 3 、Ca 10 (PO 4 ) 6 (OH) 2 及びCa 2 Mg(Si 2 O 7 )を30〜40:30〜40:30〜40の重量比で含む、結晶化ガラスセラミック。
(構成6)
構成1〜4のいずれか一項に記載のガラスセラミックを含む骨移植材。
(構成7)
構成6に記載の骨移植材で製造された、脊椎間スペーサーまたは骨組織の代替用医療機器。
(構成8)
周りの骨と直接に結合される部位に構成1に記載の結晶化ガラスセラミックを含む、構成7に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
(構成9)
3,000N〜35,000Nの圧縮強度または0.6N・m〜1.5N・mのねじり強度を有するものである、構成7に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
(構成10)
相対密度の値が理論密度の95%以上の緻密成形体である骨移植材で製造されたことを特徴とする、構成7に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
Claims (8)
- CaSiO3、Ca10(PO4)6(OH)2及びCa2Mg(Si2O7)をそれぞれ30〜40重量%で含む、結晶化ガラスセラミックであって、CaSiO 3 がウォラストナイト(Wollastonite)であり、Ca 10 (PO 4 ) 6 (OH) 2 がヒドロキシアパタイト(hydroxyapatite; HA)であり、かつCa 2 Mg(Si 2 O 7 )がオケルマナイト(Akermanite)である、前記結晶化ガラスセラミック。
- CaSiO3及びCa10(PO4)6(OH)2を含むガラスセラミックに比べてCa2Mg(Si2O7)による増加された強度を有するものである、請求項1に記載の結晶化ガラスセラミック。
- CaSiO3、Ca10(PO4)6(OH)2及びCa2Mg(Si2O7)を30〜40:30〜40:30〜40の重量比で含む、結晶化ガラスセラミック組成物であって、CaSiO 3 がウォラストナイト(Wollastonite)であり、Ca 10 (PO 4 ) 6 (OH) 2 がヒドロキシアパタイト(hydroxyapatite; HA)であり、かつCa 2 Mg(Si 2 O 7 )がオケルマナイト(Akermanite)である、前記結晶化ガラスセラミック組成物。
- 請求項1又は2に記載の前記結晶化ガラスセラミックを含む骨移植材。
- 請求項4に記載の骨移植材を用いて製造された、脊椎間スペーサーまたは骨組織の代替用医療機器。
- 周りの骨と直接に結合される部位に前記結晶化ガラスセラミックを含む、請求項5に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
- 3,000N〜35,000Nの範囲の圧縮強度または0.6N・m〜1.5N・mの範囲のねじり強度を有するものである、請求項5に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
- 相対密度の値が理論密度の95%以上の緻密成形体である骨移植材を用いて製造された、請求項5に記載の脊椎間スペーサーまたは骨組織の代替用医療機器。
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KR10-2015-0069925 | 2015-05-19 | ||
PCT/KR2015/005284 WO2016085069A1 (ko) | 2014-11-28 | 2015-05-27 | 월라스토나이트, 히드록시아파타이트 및 에커마나이트를 포함하는 고강도 결정화 유리 세라믹 |
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