JP2010017568A - 椎間板挿入のための人工椎間板 - Google Patents
椎間板挿入のための人工椎間板 Download PDFInfo
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- JP2010017568A JP2010017568A JP2009216253A JP2009216253A JP2010017568A JP 2010017568 A JP2010017568 A JP 2010017568A JP 2009216253 A JP2009216253 A JP 2009216253A JP 2009216253 A JP2009216253 A JP 2009216253A JP 2010017568 A JP2010017568 A JP 2010017568A
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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
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- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
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- A61F2250/0043—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in electric properties, e.g. in electrical conductivity, in galvanic properties
- A61F2250/0045—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in electric properties, e.g. in electrical conductivity, in galvanic properties differing in electromagnetical properties
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
- A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
- A61F2250/0098—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers radio-opaque, e.g. radio-opaque markers
-
- 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
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00179—Ceramics or ceramic-like structures
-
- 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
- A61F2310/00598—Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
- A61F2310/00604—Coating made of aluminium oxide or hydroxides
-
- 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
- A61F2310/00856—Coating or prosthesis-covering structure made of compounds based on metal nitrides
- A61F2310/0088—Coating made of titanium nitride
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Abstract
【解決手段】隣接した椎骨間に挿入するための人工椎間板10であって、人工椎間板は、それぞれの椎骨に接して設置可能な外側表面18、内側ベアリング面、および横部分を有する、上部プレート12および下部プレート14;プレート間のコア16であって、コアは、プレートの内側ベアリング面に相補的な形状の上部表面および下部表面を有し、コア上をプレートがスライドするのを可能にする、コア;ならびにプレートのベアリング面のうちの少なくとも1つと、コアとにある形成物であって、形成物は互いに協同して、プレート間にコアを保持し、形成物は、プレートのうちの少なくとも1つにあるリブ、およびコアのチャネルを備え、リブは、チャネル内に位置して、コア上をプレートがスライド移動する際に、プレート間にコアを係留する、形成物を備える、人工椎間板。
【選択図】図1
Description
本願は、「Prosthetic Disc for Intervertebral
Insertion」と題された米国仮特許出願第60/473,802号および「Intervertebral Prosthetic Disc」と題された同第60/473,803号(共に2003年5月27日に出願)の優先権を主張し、これらの完全な開示は、本明細書中に参考として援用される。
(1.発明の分野)
本発明は、医療デバイスおよび方法に関する。より具体的には、本発明は、腰椎および頸椎などへの椎間挿入のための人工椎間板に関する。
公開された米国特許出願第2002/0035400A1号および同第2002/0128715A1号(それぞれ特許文献3および4)は、対立するプレートとそれらのプレート間のコアを備え、このコアの上をプレートがスライド可能である、椎間板移植物を記載する。このコアは、1つ以上の中心支柱を収容し、これらの支柱はプレートによって担持され、コアの中の中心開口部の向かい合った端部に位置する。このような配置により、プレートとコアの間に利用可能な耐力面積が制限される。
(項目1)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
上部曲面および下部曲面を有するコア;
上部プレートおよび下部プレートであって、各プレートが、椎骨に係合する外側表面および該コアの曲面上をスライドする内側曲面を有する、プレート;ならびに
該上部プレート、該下部プレートのうちの少なくとも1つおよび該コア上の周縁制限構造であって、該コア上を該プレートがスライド移動する間、該プレートのうちの少なくとも1つの曲面に対して該コアを保持する、周縁制限構造
を備える、人工椎間板。
(項目2)
上記曲面のうちの少なくとも1つが球状である、上記項目に記載の人工椎間板。
(項目3)
両方の曲面が球状である、上記項目のうちのいずれかに記載の人工椎間板。
(項目4)
上記周縁制限構造内での上記コアの運動が拘束を受けていない、上記項目のうちのいずれかに記載の人工椎間板。
(項目5)
上記周縁制限構造が停止構造を規定し、上記コア上を上記プレートがスライド移動する間、該プレートの相対的傾斜を制限する、上記項目のうちのいずれかに記載の人工椎間板。
(項目6)
上記周縁制限構造が上記コアの片側に係合して、該コア上を上記プレートがスライド移動する間、該コアの反対側を持ち上げる、上記項目のうちのいずれかに記載の人工椎間板。
(項目7)
上記周縁制限構造が、以下:
上記コアの周縁部の少なくとも一部に広がる、環状構造;ならびに
上記上部プレートおよび下部プレートの1つの上のリング構造であって、該リング構造は、該環状構造を係合し、かつ保持する、リング構造
を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目8)
上記リング構造が、突出部を規定するフランジを備え、ここで、上記コア上の上記環状構造の少なくとも一部が該突出部の中に伸長して、該コアと該フランジとの締り嵌めを提供する、上記項目のうちのいずれかに記載の人工椎間板。
(項目9)
上記環状構造が、上記コアの外周の周りに連続的に伸長するリムを備え、該リムが、上記フランジの内側エッジの幅よりも大きな幅を少なくともいくつかの部位に有して上記締り嵌めを提供する、上記項目のうちのいずれかに記載の人工椎間板。
(項目10)
上記周縁制限構造が、以下:
上記コアの外側エッジの周りの溝;ならびに
上記上部プレートおよび下部プレートのうちの少なくとも1つの上のリング構造であって、該リング構造は、該溝を係合するリップを有する、リング構造
を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目11)
上記リップが上記溝の中に伸長して、上記リング構造と上記コアとの間の締り嵌めを形成する、上記項目のうちのいずれかに記載の人工椎間板。
(項目12)
上記上部プレートおよび下部プレートの外側表面が、上記椎骨への該外側表面の取付けを促進するために少なくとも1つの表面特徴を有する、上記項目のうちのいずれかに記載の人工椎間板。
(項目13)
上記少なくとも1つの表面特徴が、上記外側表面に沿って配置された複数の鋸歯状の縁を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目14)
上記少なくとも1つの表面特徴が、表面コーティングをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目15)
上記表面コーティングが、プラズマ溶射されたチタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目16)
上記少なくとも1つの表面特徴が、酸化アルミニウムブラスト処理によって形成された複数の陥凹部をさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目17)
上記少なくとも1つの表面特徴が、上記外側表面の各々の上に配置された少なくとも1つのフィンをさらに含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目18)
各フィンが、上記椎骨への取付けをさらに促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目19)
各フィンが、前後方向に直線に配向される、上記項目のうちのいずれかに記載の人工椎間板。
(項目20)
各フィンが、上記椎間板の前後軸から離れて回転する、上記項目のうちのいずれかに記載の人工椎間板。
(項目21)
上記プレートが、コバルトクロムモリブデンおよびチタンからなる群より選択される少なくとも1つの金属を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目22)
各プレートが、上記内側表面を形成する硬化材料に連結されたMRI適合性の材料を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目23)
上記MRI適合性の材料が、チタン、およびコバルトクロムモリブデンを含む上記硬化材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目24)
上記MRI適合性の材料が、チタンおよび上記硬化材料の窒化チタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目25)
上記MRI適合性の材料および上記硬化材料が、積層、滑り嵌め、締り嵌めおよび接着からなる群より選択されるプロセスを用いて連結される、上記項目のうちのいずれかに記載の人工椎間板。
(項目26)
上記コアが、上記上部プレートおよび下部プレートの内側曲面をスライド可能に係合する、2つの対面する凸状低摩擦表面を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目27)
上記コアが、ポリマーおよびセラミックからなる群より選択される少なくとも1つの材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目28)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に接して設置可能な外側表面、および内側曲面を有する、上部プレートおよび下部プレートであって、該上部プレートおよび下部プレートのうちの少なくとも1つが、該内側表面の周縁部付近に広がる周縁制限構造を備える、プレート;ならびに
移動式コアであって、該プレートが該コア上をスライド可能になるように該曲面の間に配置された移動式コア
を備え、
ここで、該コアが該周縁制限構造と係合するための少なくとも1つの周縁突出を備えることにより、該コア上を該プレートがスライド移動する間、該プレート間に該コアを係留する、人工椎間板。
(項目29)
上記周縁制限構造がフランジを備え、ここで、上記コア上の突出の少なくとも一部が該フランジの中に伸長して、該コアと該フランジとの締り嵌めを提供する、上記項目のうちのいずれかに記載の人工椎間板。
(項目30)
上記突出が上記コアの外周の周りにリムを備え、該リムが上記フランジの内側エッジの直径よりも大きな直径を有する、上記項目のうちのいずれかに記載の人工椎間板。
(項目31)
上記プレートの内側表面が凹状であり、上記コアが、該凹状内側表面とスライド可能に接触するための2つの凸面を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目32)
上記凹状曲面および凸状曲面が球状である、上記項目のうちのいずれかに記載の人工椎間板。
(項目33)
上記コアがポリマーおよびセラミックからなる群より選択される材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目34)
上記プレートの外側表面の各々から伸長する少なくとも1つのフィンをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目35)
各フィンが、椎骨への該フィンの取付けを促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目36)
各フィンが、前後方向に直線に配向される、上記項目のうちのいずれかに記載の人工椎間板。
(項目37)
各フィンが、上記椎間板の前後軸から離れて回転する、上記項目のうちのいずれかに記載の人工椎間板。
(項目38)
上記プレートの外側表面をテクスチャー加工して、上記椎骨に対する該プレートの取付けを強化する、上記項目のうちのいずれかに記載の人工椎間板。
(項目39)
上記テクスチャー加工した表面が、鋸歯状の表面を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目40)
上記鋸歯状の表面が、酸化アルミニウムブラスト処理によって形成された複数の陥凹部をさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目41)
上記外側表面が表面コーティングをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目42)
上記表面コーティングが、プラズマ溶射されたチタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目43)
上記プレートの外側表面が平坦である、上記項目のうちのいずれかに記載の人工椎間板。
(項目44)
各プレートが、上記内側表面を形成する硬化材料に連結されたMRI適合性の材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目45)
上記MRI適合性の材料が、チタン、およびコバルトクロムモリブデンを含む上記硬化材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目46)
上記MRI適合性の材料が、チタンおよび上記硬化材料の窒化チタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目47)
上記MRI適合性の材料および上記硬化材料が、積層、滑り嵌め、締り嵌めおよび接着からなる群より選択されるプロセスを用いて連結される、上記項目のうちのいずれかに記載の人工椎間板。
(項目48)
上記上部プレートおよび下部プレートの1つのフランジが、上記コア上を該プレートがスライド移動する間、その内側表面に隣接した他のプレートと接触するように適合される、上記項目のうちのいずれかに記載の人工椎間板。
(項目49)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に接して設置可能な外側表面、および内側曲面を有する、上部プレートおよび下部プレートであって、該上部プレートおよび下部プレートのうちの少なくとも1つが、該内側表面の周縁部付近に広がる周縁制限構造を備える、プレート;ならびに
該プレートが上記コア上をスライド可能になるように、該曲面の間に配置された移動式コア
を備え、
ここで、該コアが該周縁制限構造と係合するための側方溝を備えることにより、該コア上を該プレートがスライド移動する間、該プレート間に該コアを係留する、人工椎間板。
(項目50)
上記周縁制限構造が、上記コア上の上記溝の中に伸長するように適合させたフランジを備えて、該コアと該フランジとの締り嵌めを提供する、上記項目のうちのいずれかに記載の人工椎間板。
(項目51)
上記溝に直接に隣接した上記コアの一部が、上記フランジの内側エッジの直径よりも大きな直径を有する、上記項目のうちのいずれかに記載の人工椎間板。
(項目52)
上記プレートの内側表面が凹状であり、上記コアが、該内側表面とスライド可能に接触するための2つの凸面を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目53)
上記凹状曲面および凸状曲面が球状である、上記項目のうちのいずれかに記載の人工椎間板。
(項目54)
上記コアがポリマーおよびセラミックからなる群より選択される材料を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目55)
上記プレートの外側表面の各々から伸長する少なくとも1つのフィンをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目56)
各フィンが、椎骨への該フィンの取付けを促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目57)
上記プレートの外側表面をテクスチャー加工して、上記椎骨に対する該プレートの取付けを強化する、上記項目のうちのいずれかに記載の人工椎間板。
(項目58)
上記テクスチャー加工した表面が、鋸歯状の表面を含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目59)
上記外側表面が表面コーティングをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目60)
上記表面コーティングが、プラズマ溶射されたチタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目61)
上記プレートの外側表面が平坦である、上記項目のうちのいずれかに記載の人工椎間板。
(項目62)
上記上部プレートおよび下部プレートの1つのフランジが、上記コア上を該プレートがスライド移動する間、その内側表面に隣接した他のプレートと接触するように適合される、上記項目のうちのいずれかに記載の人工椎間板。
(項目63)
隣接した椎骨間の間隔を制限するための方法であって、該方法は、以下の工程:
上部椎体の下部表面に対して上部プレートを移植する工程;
下部椎体の上部表面に対して下部プレートを移植する工程;および
該上部プレートと該下部プレートとの間にコアを配置する工程
を包含し、
ここで、該コアは、該上部プレートおよび該下部プレートのそれぞれの球状空洞の間に浮遊し、該プレートは、少なくとも1つの周縁制限部材を用いて該コアの周縁移動を制限する、方法。
(項目64)
上記プレートの各々を移植する工程が、そのそれぞれの椎体中に形成された対応する溝の中に、各プレート上のフィンをスライドさせる工程を包含する、上記項目のうちのいずれかに記載の方法。
(項目65)
上記フィンをスライドさせる工程が、後方から前方の方向に行われる、上記項目のうちのいずれかに記載の方法。
(項目66)
上記フィンをスライドさせる工程が、横方向に行われる、上記項目のうちのいずれかに記載の方法。
(項目67)
上記フィンをスライドさせる工程が、後方−前方と側方との間に角をなす方向に行われる、上記項目のうちのいずれかに記載の方法。
(項目68)
移植する工程が、上記上部プレートおよび上記下部プレートのテクスチャー加工した外側表面を、上記椎体の上部表面および下部表面と接触させる工程をさらに包含する、上記項目のうちのいずれかに記載の方法。
(項目69)
隣接した椎骨間に挿入するための人工椎間板を組み立てるための方法であって、該方法は、以下の工程:
コアを第1エンドプレートと移動可能に連結させて、該コアと該第1エンドプレートとの間に締り嵌めを形成する工程;および
該コアを第2エンドプレートと接触させる工程
を包含する、方法。
(項目70)
上記コアを上記第1エンドプレートと連結させる工程が、該コアを該エンドプレート中にスナップ嵌めする工程を包含する、上記項目のうちのいずれかに記載の方法。
(項目71)
上記コアを上記第1エンドプレートと連結させる工程が、該コアの周りに該エンドプレートを形成する工程を包含する、上記項目のうちのいずれかに記載の方法。
(項目72)
上記コアを上記第1エンドプレートと連結させる工程が、該コアの周縁突出を該第1エンドプレートの周縁制限構造と係合させる工程を包含する、上記項目のうちのいずれかに記載の方法。
(項目73)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に対して設置可能な外側表面、および内側曲面を有する、上部プレートおよび下部プレート;
該プレート間のコアであって、該コアは、該プレートの内側曲面に相補的な形状の上部曲面および下部曲面を有し、該コア上を該プレートがスライドするのを可能にする、コア;ならびに
該コアの上部曲面および下部曲面のうちの少なくとも1つから、該プレートの内側表面の1つの少なくとも1つの陥凹の中へ伸長する、少なくとも1つの突出物であって、該陥凹が該突出物に対して過大であることにより、該コア上を該プレートがスライド移動可能になると同時に、このようなスライド移動の間、該プレート間に該コアを保持する、突出物
を備える、人工椎間板。
(項目74)
上記コアの上部表面および下部表面から伸長する複数の突出物をさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目75)
上記複数の突出物が、上記コアの上部表面および下部表面の各々の周縁部分から、上記上部プレートおよび下部プレート上のリング形の陥凹の中へ突出する、2つの隆起リングを備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目76)
上記複数の突出物が、上記コアの上部表面および下部表面の各々の周縁部分から、上記上部プレートおよび下部プレート上の複数の陥凹の中へ突出する、複数の表面特徴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目77)
上記複数の突出物が、上記コアを貫通して軸方向に伸長する細長い直立した要素のそれぞれの端部を含み、該端部が該コアの上部表面および下部表面を越えて突出する、上記項目のうちのいずれかに記載の人工椎間板。
(項目78)
上記直立要素が、上記コアを貫通する軸方向通路を通って伸長するロッドを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目79)
上記ロッドおよび通路が、係合のために互いに相補的にねじ込まれる、上記項目のうちのいずれかに記載の人工椎間板。
(項目80)
上記プレートの外側表面の各々から伸長する少なくとも1つのフィンをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目81)
各フィンが、前後方向に直線に配向される、上記項目のうちのいずれかに記載の人工椎間板。
(項目82)
各フィンが、上記人工椎間板の前後軸から離れて回転する、上記項目のうちのいずれかに記載の人工椎間板。
(項目83)
各フィンが、上記椎骨への上記プレートの取付けを促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目84)
上記プレートの外側表面をテクスチャー加工して、上記椎骨に対する該プレートの取付けを強化する、上記項目のうちのいずれかに記載の人工椎間板。
(項目85)
上記テクスチャー加工した表面が、複数の鋸歯状の縁を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目86)
上記外側表面が、上記椎骨に対する上記プレートの取付けを強化するために表面コーティングをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目87)
上記表面コーティングが、プラズマ溶射されたチタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目88)
上記プレートの外側表面が平坦である、上記項目のうちのいずれかに記載の人工椎間板。
(項目89)
上記上部プレートおよび下部プレートの外側エッジ部分が、上記コア上を該プレートがスライド移動する間、互いに接触するように適合されている、上記項目のうちのいずれかに記載の人工椎間板。
(項目90)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に接して設置可能な外側表面、および内側曲面を有する、上部プレートならびに下部プレートであって、該内側表面の少なくとも1つが少なくとも1つの陥凹を有する、上部プレートならびに下部プレート;
該プレート間のコアであって、該コアは、該コア上を該プレートがスライドするのを可能にするために、該プレートの内側曲面に相補的な形状の上部曲面および下部曲面を有し、かつ軸方向の通路が該コアを貫通して伸長する、コア;ならびに
軸方向の通路を通って該プレートの内側表面の少なくとも1つの陥凹の中へ伸長するロッドであって、該陥凹が該突出物に対して過大であることにより、該コア上を該プレートがスライド移動可能になると同時に、このようなスライド移動の間、該プレート間に該コアを保持する、ロッド
を備える、人工椎間板。
(項目91)
上記ロッドおよび通路が、係合のために互いに相補的にねじ込まれる、上記項目のうちのいずれかに記載の人工椎間板。
(項目92)
上記ロッドが、上記上部プレート上の第1過大陥凹および上記下部プレート上の第2過大陥凹と、移動可能に係合される、上記項目のうちのいずれかに記載の人工椎間板。
(項目93)
上記プレートの外側表面の各々から伸長する少なくとも1つのフィンをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目94)
各フィンが、前後方向に直線に配向される、上記項目のうちのいずれかに記載の人工椎間板。
(項目95)
各フィンが、上記人工椎間板の前後軸から離れて回転する、上記項目のうちのいずれかに記載の人工椎間板。
(項目96)
各フィンが、上記椎骨への上記プレートの取付けを促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目97)
上記プレートの外側表面をテクスチャー加工して、上記椎骨に対する該プレートの取付けを強化する、上記項目のうちのいずれかに記載の人工椎間板。
(項目98)
上記テクスチャー加工した表面が、複数の鋸歯状の縁を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目99)
上記外側表面が、上記椎骨に対する上記プレートの取付けを強化するために表面コーティングをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目100)
上記表面コーティングが、プラズマ溶射されたチタンを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目101)
上記プレートの外側表面が平坦である、上記項目のうちのいずれかに記載の人工椎間板。
(項目102)
上記上部プレートおよび下部プレートの外側エッジ部分が、上記コア上を該プレートがスライド移動する間、互いに接触するように適合されている、上記項目のうちのいずれかに記載の人工椎間板。
(項目103)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に対して設置可能な外側表面、および内側曲面を有する、上部プレートおよび下部プレート;
該プレート間のコアであって、該コアは、該プレートの内側曲面に相補的な形状の上部曲面および下部曲面を有し、該コア上を該プレートがスライドするのを可能にする、コア;ならびに
該コアを貫いて側方に伸長し、かつ該コアの外側に端部を有する可撓性の繋ぎ部材であって、該端部が、該コア上を該プレートがスライドするときに該プレート間に該コアを保持するために、該プレートの一方または両方と係合される、可撓性の繋ぎ部材
を備える、人工椎間板。
(項目104)
上記可撓性の繋ぎ部材が、上記コアを貫通する側方通路を通って伸長し、かつ上部プレートおよび下部プレートのうちの少なくとも1つと係合される端部を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目105)
上記可撓性の繋ぎ部材が、可撓性のケーブルまたはコードを含む、上記項目のうちのいずれかに記載の人工椎間板。
(項目106)
隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
それぞれの椎骨に対して設置可能な外側表面、および内側曲面を有する、上部プレートおよび下部プレート;ならびに
該プレート間のコアであって、該コアは、該プレートの内側曲面に相補的な形状の上部曲面および下部曲面を有し、該コア上を該プレートがスライドするのを可能にする、コアを備え、
ここで、上記プレートおよびコアの曲面が、該プレートが該コア上をスライドするときに該プレート間に該コアを保持するために、互いに協同する形成物を備え、このような形成物には、陥凹および該陥凹に収容される突出物が含まれ、該陥凹および突出物は、関連する曲面の中心軸とその外周との間に設置される、人工椎間板。
(項目107)
上記突出物が、上記コアの上部表面および下部表面の各々の周縁部分から、上記上部プレートおよび下部プレート上のリング形の陥凹の中へ突出する、2つの隆起リングを備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目108)
上記突出物が、上記コアの上部表面および下部表面の各々の周縁部分から、上記上部プレートおよび下部プレート上の複数の陥凹の中へ突出する、複数の表面特徴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目109)
上記プレートの外側表面の各々から伸長する少なくとも1つのフィンをさらに備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目110)
各フィンが、前後方向に直線に配向される、上記項目のうちのいずれかに記載の人工椎間板。
(項目111)
各フィンが、上記人工椎間板の前後軸から離れて回転する、上記項目のうちのいずれかに記載の人工椎間板。
(項目112)
各フィンが、上記椎骨への上記プレートの取付けを促進するための少なくとも1つの穴を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目113)
上記プレートの外側表面をテクスチャー加工して、上記椎骨に対する該プレートの取付けを強化する、上記項目のうちのいずれかに記載の人工椎間板。
(項目114)
上記テクスチャー加工した表面が、複数の鋸歯状の縁を備える、上記項目のうちのいずれかに記載の人工椎間板。
(項目115)
上記プレートの外側表面が平坦である、上記項目のうちのいずれかに記載の人工椎間板。
(項目116)
上記上部プレートおよび下部プレートの外側エッジ部分が、上記コア上を該プレートがスライド移動する間、互いに接触するように適合されている、上記項目のうちのいずれかに記載の人工椎間板。
(発明の簡単な要旨)
本発明の1つの局面において、隣接した椎骨間に挿入するための人工椎間板は、それぞれの椎骨に係合し、かつそれぞれの椎骨に接して設置可能な外側表面、ならびに内側曲面を有する、上部プレートおよび下部プレートを備える。これらの曲面の間にコアが配置されることにより、プレートがコアの上をスライド可能になる。好ましくは、これらのプレートは、先行技術のように単一方向の移動に限定されることなく、あらゆる方向に自由にスライド可能である。本発明は、これらのプレートまたはコアの一方または両方の上に、周縁制限構造をさらに提供して、コア上でのプレートのスライド移動の間、少なくとも1つのプレートの曲面に対してコアを保持する。この周縁制限構造は、上部プレートおよび下部プレートのうちの少なくとも1つに対して、コアの移動の限界または境界を規定する。しかしながら、このような周縁境界内で、プレートに対するコアの移動は、好ましくは拘束を受けない。すなわち、プレートに対するコアの移動は、顕著な阻害または摩擦なしに、任意の方向に起こり得る。このコアは、好ましくは上部または下部プレートのいずれにも取り付けられず、従ってこれらのプレートはコアの上に互いに自由に関節でつながり得、低摩擦を生じる表面を提供する。
図1〜4は、隣接した2つの脊髄椎骨(図示せず)の間に椎間挿入するための人工椎間板10を図解する。この人工椎間板10は、3つの構成要素、すなわち上部プレートまたはシェル12、下部プレートまたはシェル14およびこれらのプレート間に配置されたコア16を備える。
Claims (1)
- 隣接した椎骨間に挿入するための人工椎間板であって、該人工椎間板は、以下:
上部曲面および下部曲面を有するコア;
上部プレートおよび下部プレートであって、各プレートが、椎骨に係合する外側表面お
よび該コアの曲面上をスライドする内側曲面を有する、プレート;ならびに
該上部プレート、該下部プレートの少なくとも1つおよび該コア上の周縁制限構造であ
って、該コア上を該プレートがスライド移動する間、該プレートの少なくとも1つの曲面
に対して該コアを保持する、周縁制限構造を備える、人工椎間板。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US47380203P | 2003-05-27 | 2003-05-27 | |
US47380303P | 2003-05-27 | 2003-05-27 |
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