JP2011526500A - 椎間板エンドプロテーゼ - Google Patents
椎間板エンドプロテーゼ Download PDFInfo
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- JP2011526500A JP2011526500A JP2011515447A JP2011515447A JP2011526500A JP 2011526500 A JP2011526500 A JP 2011526500A JP 2011515447 A JP2011515447 A JP 2011515447A JP 2011515447 A JP2011515447 A JP 2011515447A JP 2011526500 A JP2011526500 A JP 2011526500A
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- zirconium dioxide
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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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
- A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
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- A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
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- A61F2/02—Prostheses implantable into the body
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- A61F2/3094—Designing or manufacturing processes
- A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
- A61F2002/30957—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using a positive or a negative model, e.g. moulds
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
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- A61F2310/00179—Ceramics or ceramic-like structures
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
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- A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
- A61F2310/00233—Ceramics or ceramic-like structures based on metal oxides containing chromia or chromium oxides CrO, CrO2 or CrO3
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- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
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- A61L2430/38—Materials or treatment for tissue regeneration for reconstruction of the spine, vertebrae or intervertebral discs
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Abstract
Description
2〜5体積%;二酸化ジルコニウム1,000:1〜100:1
>5〜15体積%;二酸化ジルコニウム200:1〜40:1
>15〜30体積%;二酸化ジルコニウム100:1〜20:1
>30〜40体積%;二酸化ジルコニウム40:1〜20:1
の範囲となるように調整することが極めて好ましいと判明した。
1.椎間板エンドプロテーゼのスライド体は、極端に低い摩耗を有する。
意想外にも、従来技術、例えばEP−A0542815に記載されるように、酸化ストロンチウムを用いてのみならず、他の特定の酸化物を用いて、小板を組織中に作製できることを確認した。小板形成のための前提条件は、"in situ"で形成されるべき小板の六方晶結晶構造を形成することである。マトリックスとして材料系Al2O3−Cr2O3−ZrO2−Y2O3(CeO2)を使用する場合、種々の酸化物を用いて下記の小板を"in situ"で形成することができる。アルカリ金属酸化物を合金化した場合、相応するアルカリ金属Al11-xCrxO17小板が形成され、アルカリ土類金属酸化物を合金化した場合、相応するアルカリ土類金属Al12-xCrxO17小板が形成され、CdO、PbO、HgOを合金化した場合、相応する(Cd、PbまたはHgAl12-xCrxO19)小板が形成され、かつ希土類金属酸化物を合金化した場合、相応する希土類金属Al11-xCrxO18小板が形成される。La2O3は、それに加えて化合物La0.9Al11.76-xCrxO19を形成することができる。小板は、マトリックスがCr2O3を含有しない場合も形成される。その時に形成される小板は、一般式:アルカリ金属Al11O17、アルカリ土類金属Al12O19、(Cd、PbまたはHgAl12O19)または希土類金属Al12O18に相当する。
a1)マトリックス材料60〜98体積%が、
a2)酸化アルミニウム/酸化クロム混晶67.1〜99.2体積%および
a3)一般式La0.9Al11.76-xCrxO19、Me1Al11-xCrxO17、Me2Al12-xCrxO19、Me2'Al12-xCrxO19および/またはMe3Al11-xCrxO18の1つに従った少なくとも1つの混晶から選択されている、さらなる混晶0.8〜32.9体積%を含有し、その際、Me1はアルカリ金属、M2はアルカリ土類金属、Me2'はカドミウム、鉛または水銀を表し、かつMe3は希土類金属を表し、かつxは0.0007〜0.045の値に相当する、かつ
b)マトリックス材料2〜40体積%が、安定化された二酸化ジルコニウムを含有することを特徴とする、マトリックス材料を有する焼結成形体が提供される。
本発明により、セラミックスからなるスライド体は、その他の実施形態において下記のものを含有する:
クロムドーピングを有する酸化アルミニウム70〜90体積割合(Al2O3:Cr)、
Y−安定化を伴う酸化ジルコニウム12〜22体積割合(ZrO2:Y)および
可変のCrドーピングを有する式SrAl12−xCrxO19のアルミン酸ストロンチウム1〜5体積割合。
Claims (20)
- 椎体骨にそのつど固定するための上側終板(1)および下側終板(2)と、前記終板(1、2)の間に配置された、互いにスライド式に形成されているスライド体(3、4)から成るスライド支承部とを有する、脊柱に移植するための椎間板エンドプロテーゼであって、その際、両終板(1、2)がプラスチックから成り、かつ前記スライド体(3、4)がセラミックスから成り、前記スライド体(3、4)が前記終板(1、2)のプラスチックでインサート成形されており、かつ前記終板(1、2)のプラスチックでインサート成形された前記スライド体(3、4)の表面領域が平らな面と比べて表面拡張部を有する椎間板エンドプロテーゼにおいて、前記表面拡張部が前記スライド体(3、4)の隆起部(6)または凹部であることを特徴とする、脊柱に移植するための椎間板エンドプロテーゼ。
- 前記表面拡張部がラフニング(7)であることを特徴とする、請求項1記載の椎間板エンドプロテーゼ。
- 前記表面拡張部がスライド体における遊隙であることを特徴とする、請求項1記載の椎間板エンドプロテーゼ。
- 前記遊隙が前記スライド体(3、4)の外周上の少なくとも1つの環状溝(5)であることを特徴とする、請求項3記載の椎間板エンドプロテーゼ。
- 前記隆起部(6)が突起(8)であることを特徴とする、請求項1記載の椎間板エンドプロテーゼ。
- a)酸化アルミニウム/酸化クロム混晶から形成されたマトリックス材料60〜98体積%、
b)前記マトリックス材料に組み入れられた二酸化ジルコニウム2〜40体積%、前記二酸化ジルコニウムは、
c)安定化酸化物として、セリウム、プラセオジムおよびテルビウムの1つ以上の酸化物10〜15モル%を、二酸化ジルコニウムと安定化酸化物とからなる混合物に対して含有し、その際
d)前記安定化酸化物の添加量の選択は、前記二酸化ジルコニウムが主として正方晶変態において存在するように、かつ
e)前記安定化酸化物を含有する二酸化ジルコニウムと酸化クロムとのモル比が1,000:1〜20:1となり、
f)全成分の割合が補い合って焼結成形体100体積%となり、
g)前記二酸化ジルコニウムが2μmを超えない粒度を有するように行われている;ことからなる、殊に請求項1から5までのいずれか1項記載の椎間板エンドプロテーゼ。 - a)酸化アルミニウムに対して0.01〜2.32質量%の酸化クロム割合を有する酸化アルミニウム/酸化クロム混晶から形成されたマトリックス材料少なくとも70体積%、
b)前記マトリックス材料に組み入れられた二酸化ジルコニウム2〜30体積%、前記二酸化ジルコニウムは、
c)二酸化ジルコニウムと酸化イットリウムとからなる混合物に対して酸化イットリウム0.27〜2.85モル%を含有し、その際、前記酸化イットリウムの添加量の選択は、前記二酸化ジルコニウムが主として正方晶変態において存在するように、かつ
d)前記二酸化ジルコニウムが2μmを超えない平均粒度において存在し、かつ
e)前記安定化酸化物を含有する二酸化ジルコニウムと酸化クロムとのモル比が1,000:1〜20:1となり、かつ
f)全成分の割合が補い合ってカッティングテンプレート100体積%となるように行われている;ことからなる、殊に請求項1から5までのいずれか1項記載の椎間板エンドプロテーゼ。 - 安定化酸化物を含有する二酸化ジルコニウムと酸化クロムとのモル比が370:1〜34:1である、請求項7記載の椎間板エンドプロテーゼ。
- a1)マトリックス材料60〜98体積%、その際、これは、
a2)67.1〜99.2体積%が酸化アルミニウム/酸化クロム混晶から
a3)0.8〜32.9体積%が式SrAl12-xCrxO19の混晶から成り、その際、xは0.0007〜0.045の値に相当し、
b)前記マトリックス材料に組み入れられた二酸化ジルコニウム2〜40体積%、前記二酸化ジルコニウムは、
c)安定化酸化物として、セリウム、プラセオジムおよびテルビウムの1つ以上の酸化物10〜15モル%を、かつ/または酸化イットリウム0.2〜3.5モル%を、二酸化ジルコニウムと安定化酸化物とからなる混合物に対して含有し、その際
d)前記安定化酸化物の添加量の選択は、前記二酸化ジルコニウムが主として正方晶変態において存在するように、かつ
e)前記安定化酸化物を含有する二酸化ジルコニウムと酸化クロムとのモル比が1,000:1〜20:1となり、
f)全成分の割合が補い合ってカッティングテンプレート100体積%となり、かつ
g)前記二酸化ジルコニウムが2μmを超えない粒度を有するように行われている;ことからなる、殊に請求項1から5までのいずれか1項記載の椎間板エンドプロテーゼ。 - a)酸化アルミニウム/酸化クロム混晶から、ならびに元素の周期系の第4副族および第5副族の金属の1つ以上の炭化物、窒化物および炭窒化物−マトリックス材料に対して−2〜25体積%から形成されたマトリックス材料60〜85体積%、
b)前記マトリックス材料に組み入れられた二酸化ジルコニウム15〜40体積%、前記二酸化ジルコニウムは、
c)安定化酸化物として、セリウム、プラセオジムおよびテルビウムの1つ以上の酸化物を10〜15モル%より多く、かつ/または酸化イットリウム0.2〜3.5モル%を、二酸化ジルコニウムと安定化酸化物とからなる混合物に対して含有し、その際
d)前記安定化酸化物の添加量の選択は、前記二酸化ジルコニウムが主として正方晶変態において存在するように、かつ
e)前記安定化酸化物を含有する二酸化ジルコニウムと酸化クロムとのモル比が100:1〜20:1となり、
f)全成分の割合が補い合って焼結成形体100体積%となり、
g)前記二酸化ジルコニウムが2μmを超えない粒度を有するように行われている;ことからなる、殊に請求項1から5までのいずれか1項記載の椎間板エンドプロテーゼ。 - 前記マトリックス材料が、そのうえさらに元素の周期系の第4副族および第5副族の金属の1つ以上の炭化物、窒化物および炭窒化物2〜25体積%−マトリックス材料に対して−を含有する、請求項9記載の椎間板エンドプロテーゼ。
- 2〜5体積%;二酸化ジルコニウム1,000:1〜100:1
>5〜15体積%;二酸化ジルコニウム200:1〜40:1
>15〜30体積%;二酸化ジルコニウム100:1〜20:1
>30〜40体積%;二酸化ジルコニウム40:1〜20:1
の範囲にある、安定化酸化物を含有する二酸化ジルコニウム対酸化クロムのモル比を有する、請求項6、7、9または11記載の椎間板エンドプロテーゼ。 - 30体積%を上回らない二酸化ジルコニウム量を有する、請求項6、9、10または11のいずれか1項および請求項12に記載の椎間板エンドプロテーゼ。
- 前記二酸化ジルコニウムが少なくとも95体積%で正方晶変態を有する、請求項6、7、9、10または11のいずれか1項および請求項12または13のいずれか1項記載の椎間板エンドプロテーゼ。
- 前記二酸化ジルコニウムが合わせて0〜5体積%で立方晶変態および/または単斜晶変態において存在する、請求項5、7、9、10または11のいずれか1項および請求項12から14までのいずれか1項記載の椎間板エンドプロテーゼ。
- 0.8〜1.5μmの酸化アルミニウム/酸化クロム混晶の平均粒度を有する、請求項6、7、9、10または11のいずれか1項および請求項12から15までのいずれか1項記載の椎間板エンドプロテーゼ。
- 0.2〜1.5μmの二酸化ジルコニウムの粒度を有する、請求項6、7、9、10または11のいずれか1項および請求項12から16までのいずれか1項記載の椎間板エンドプロテーゼ。
- 焼結成形体に対して0.5体積%を上回らない不可避の不純物を有する、請求項6、7、9、10または11のいずれか1項および請求項12から17までのいずれか1項記載の椎間板エンドプロテーゼ。
- ビッカース硬度[Hv 0.5]>1,800を有する、請求項6、7、9、10または11のいずれか1項および請求項12から18までのいずれか1項記載の椎間板エンドプロテーゼ。
- 頸部脊柱または腰部脊柱で使用するための、請求項1から19までのいずれか1項記載の椎間板エンドプロテーゼ。
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EP2349114A2 (de) | 2011-08-03 |
WO2010000766A2 (de) | 2010-01-07 |
US9237955B2 (en) | 2016-01-19 |
JP3196718U (ja) | 2015-04-02 |
JP2014208080A (ja) | 2014-11-06 |
JP5893075B2 (ja) | 2016-03-23 |
US20110218630A1 (en) | 2011-09-08 |
EP2349114B1 (de) | 2015-10-21 |
DE102009027371A1 (de) | 2010-01-07 |
WO2010000766A3 (de) | 2010-05-27 |
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