JP2003534849A - 頸椎間に置くインプラント - Google Patents
頸椎間に置くインプラントInfo
- Publication number
- JP2003534849A JP2003534849A JP2001587703A JP2001587703A JP2003534849A JP 2003534849 A JP2003534849 A JP 2003534849A JP 2001587703 A JP2001587703 A JP 2001587703A JP 2001587703 A JP2001587703 A JP 2001587703A JP 2003534849 A JP2003534849 A JP 2003534849A
- Authority
- JP
- Japan
- Prior art keywords
- ring portion
- intervertebral implant
- barbed
- cutout
- leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
-
- 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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
-
- 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
- A61F2/30—Joints
- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- 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
- A61F2/4611—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 of spinal prostheses
-
- 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
- A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30182—Other shapes
- A61F2002/30187—D-shaped or half-disc-shaped
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30581—Special structural features of bone or joint prostheses not otherwise provided for having a pocket filled with fluid, e.g. liquid
- A61F2002/30588—Special structural features of bone or joint prostheses not otherwise provided for having a pocket filled with fluid, e.g. liquid filled with solid particles
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
- A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
-
- 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
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/3071—Identification means; Administration of patients
-
- 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
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30774—Apertures or holes, e.g. of circular cross section internally-threaded
-
- 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
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
- A61F2002/30845—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes with cutting edges
-
- 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
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
-
- 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
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2002/448—Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0028—Shapes in the form of latin or greek characters
- A61F2230/0034—D-shaped
-
- 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
- A61F2250/0085—Identification means; Administration of patients
-
- 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
- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
-
- 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
- A61F2310/00179—Ceramics or ceramic-like structures
Abstract
Description
権を主張している。その全文が参考用として本明細書に組み込まれている。
離すインプラントに関する。
椎間板により分離された頸椎骨から成っている。疾患のある脊椎は椎骨、椎間板
またはその両方の劣化を生じている。椎間板と椎骨は物理的原因によっても損傷
を生じうる。外科的修復は骨移植により隣接する椎骨と融合させている。骨移植
片が成長して、隣接する椎骨と融合する時点で、隣接する椎骨を一定間隔に離し
続ける必要がある。伝統的に、このことは機械的に行われていた。典型的に、そ
のシステムは、プレートとねじまたはロッドとねじから成っている。
移植に伴う問題は、移植が必ずしも成功しないことである。移植片の吸収により
椎骨間の領域が崩壊する。インプラントのような恒久的支持構造が崩壊すること
は許されない。従来技術の椎骨間インプラントの問題点は大部分が脊椎の腰部分
内で用いるように設計されていることである。それゆえ、腰椎の輪郭にマッチし
た表面に成形されている。頸椎は腰椎の輪郭と異なる輪郭を有している。
はケージ(cages)として形成された一部のインプラントが優れた強度特性を持っ
ていないことである。簡単に製造でき、かつ、優れた強度を持つインプラントが
望まれている。
ることにより、従来技術の欠点を克服している。そのインプラントは、あぶみ(s
tirrup)型であり、2個の脚部と相互接続部分を有するリング部分が含まれてい
る。リング部分の脚部は、そのリング部分の厚みを超えた厚みを有する切落し部
に接続している。さらに、そのリング部分の脚部には、とげ状(barbed)鋸歯を設
けられた上面と下面も含まれている。各歯は後ろ向きに傾いた角度を持つ近い方
の面とほぼ垂直な遠い方の面、隣接した歯の各ペアの間にある丸い谷底により形
成されている。
骨の崩壊を防止する物理的支持装置の利点を提供している。この装置は挿入しや
すく、優れた強度を持つ。本発明のこれらと他の特徴、側面および利点は以下の
説明、添付した請求項、添付図面により完全に示されている。
骨100および110の間に挿入しうる。この手順は、隣接する椎骨間の椎間板
120が損傷を生じ、または、除去されている時に、とくに一般的に行われる。
図1は、頸椎間インプラント30を示し、その形状は、患者の人体内に置かれたと
きにインプラント30に隣接し、図10および図11に示されている上側の頸椎
100の接触面102と下側の頸椎110の接触面112の形状にマッチしてい
る。
、上下が開いている一体型に形成されているリング部分40を有している。リン
グ部分40には2個の脚部42と44、および、その2個の脚部42と44の間
の相互接続部分46が含まれる。各脚部42はその相互接続部分46に接続して
いる端部で、その相互接続部分46の方に曲げられる。脚部42と44の外面4
3と45、および、相互接続部分46の外面47がリング部分40の外面41を
形成していて、この面41は滑らかである。脚部42と44および相互接続部分
46は同じ厚みを有する。相互接続部分46に接続していない脚部42の各端部
は長軸“l”に沿って切落し部70の方に伸びていて、その切落し部70に接続
している。各脚部42は上面48と下面49を有している。
部分46は曲がっていて、その曲率半径は約3/16インチ未満である。図2に
示す本発明の一実施例では、相互接続部分46の曲率半径Rは切落し部70と相
互接続部分46の間の最大距離Dの半分を超えない。相互接続部分46には図5
に示すように面取りをした上面と下面50および51が含まれる。さらに、相互
接続部分46には凸型外面47が含まれる。面取りをした面50および51と凸
型外面47が椎骨の間にインプラント30を挿入しやすくする。図1および4に
示すように、相互接続部分46には開口部52が含まれ、人体内でインプラント
30を挿入、取外し、または、位置決めをするのに用いる工具の取付に使用しう
る。開口部52の内面はねじ付き案内装置を確実に固定できるようにねじ溝を設
けて良い。
とげが、とげ状鋸歯または椎骨係合ポイント54とも言うべきものが含まれる。
とげ状鋸歯54はその脚部の上面48およびその脚部の下面49に沿って位置し
、また、その上に立ち上がっている。とげ状鋸歯54は近い方の面56と遠い方
の面58により形成されている。とげ状鋸歯54の近い方の面56はインプラン
ト30の挿入方向に対して後ろ向きの角度を有している。遠い方の面58はほぼ
垂直の角度にして良い。さらに、遠い方の面58はインプラント30の挿入方向
に対して後ろ向きの角度にしうる。とげ状鋸歯54それぞれの基部60の間には
丸い谷部59がある。図12に示すように、とげ状鋸歯54の全体的に後ろ向き
の角度方向によりインプラント30は有意な抵抗を受けずに挿入できる。挿入さ
れてしまえば、その角度方向により、インプラントの移動に対して押し戻し、ま
たは、抵抗できる。
まれる。とげ状鋸歯54の頂部62は鋭くて、上側の隣接椎骨100と下側の隣
接椎骨110の骨の中に入りやすくなっている。隣接するとげ状鋸歯54の頂部
62の向きは、その間にインプラント30を置く上側と下側の頸椎100および
110の形状により変化する。例えば、図6に示すように、とげ状鋸歯54の頂
部62はアーチ状になっている。アーチの形状により、1個の鋸歯の頂部の高さ
は、隣接する鋸歯の頂部の高さとは異なっている。
ント30を示している。一方、図6は上側の隣接椎骨100の円弧が大きい時に
用いる実施例を示している。脚部40および42の下面から立上がった頂部62
は、下側の隣接椎骨110の接触面が円弧でないのでアーチ状になっていない。
しかしながら、下側の隣接椎骨110が円弧を有している場合、脚部の下面49
から立上がっている頂部は、その椎骨の接触面112に対応してアーチ状にでき
る。脚部42と44の一方または両方の外面に識別マークを印字できるが、必要
条件ではない。
本発明の一実施例では、個々の脚部の上面と下面48および49のとげ状鋸歯5
4の数は6を超えない。図1に示すように、それぞれのとげ状鋸歯54には内側
64と外側66が含まれる。各とげ状鋸歯54の外側66は脚部43と45また
は相互接続部分47の外面と同様に平坦(同一面内に入る)である。各とげ状鋸
歯54の内側64は同様に脚部または相互接続部分の内面と同一面である。
ように、切落し部70は隣接する脚部上のとげ状鋸歯54の形状に合わせた上面
74と下面76を有している。代わりに、図6に示すように、切落し部70の上
面74は切落し部70の外面に向かって部分的に面取りを行える。さらに、面取
りをしたコーナーは切落し部70の下面76と切落し部70の外面72の間にも
存在しうる。ねじ溝付きまたはねじ溝無しの開口部78を切落し部70内の中心
に置くことができ、位置決め工具を用いてインプラント30の配置、調節および
取外しを行える。相互接続部分46と切落し部70の面取りエッジ50も椎骨の
表面に係合するように機能する。切落し部70の厚みはリング部分40の任意の
部分(脚部または相互接続部分)の厚みを超えない。
材料のような人体に適合する他の材料から作っても良い。図14に示すように、
リング部分40内に骨移植材料を置ける。その材料を多孔質バッグ90内に入れ
て良い。骨移植材料は上側の隣接椎骨100を下側の隣接椎骨110に融合する
のに役立つ。
。図1に示すように、椎骨の面の平面と位置合わせをしたインプラント30の長
軸“l”によりインプラント30が椎骨100および110の間で位置決めされ
る。インプラント30の垂直軸“v”は人体の脊椎全体の長手方向に合わされて
いる(図7に例示)。それで、頸椎インプラント30の開いている上部と下部が
頸椎の接触面102と112に接し、かつ、とげ状鋸歯54がこれらの表面に係
合する。さらに、相互接続部分46と切落し部分70の面取り面も椎骨の接触面
に係合するように機能する。インプラント30の挿入前に、椎間板120の疾患
または損傷のある部分を最初に除去するために椎間板切除が好ましく行われる。
必要な場合、当該分野の技術者なら知っている工具を用いて、隣接する椎骨10
0と110の間隔を広げても良い。その代わりに、椎骨の崩壊が好ましくない状
態になっていなければ、間隔を広げる必要はない。さらに、インプラント30は
図13に示すように後方に挿入しうる。
るが、上側の椎骨の接触面積102と下側の椎骨の接触面積112が大きければ
、1個を超えるインプラント30も使用できる。本発明は特定の好ましい実施例
および代替的実施例を参照して示し、かつ、説明しているけれども、本発明はこ
れらの特定実施例に限定されていない。請求項および同等内容として本発明の範
囲に残っていても、材料および適用方法の種々の組合わせで、小さな変形および
非本質的違いは当該分野の通常の技術者であれば生じうる。
ラントの端面図である。
Claims (10)
- 【請求項1】 上側と下側の頸椎の間に置くために、あぶみ(stirrup)型に
なっている椎骨間のインプラントで、 リング部分が2個の脚部と相互接続部分を含み、前記の脚部と相互接続部分の
厚みが等しいこと、 切落し部が前記リング部分の前記脚部を相互接続して、前記切落し部は前記の
リング部分の厚みを超える厚みを有すること、 前記リング部分の脚部が上面と下面を持つこと、それぞれの上面と下面には複
数のとげ状鋸歯が設けられていること、 前記のとげ状鋸歯のそれぞれが、後ろ向きに傾斜した角度を有する近い方の面
、ほぼ垂直な遠い方の面、および、隣接するとげ状鋸歯の間の丸い谷により形成
されていること、 から成っているあぶみ型になっている椎骨間のインプラント。 - 【請求項2】 さらに、前記リング部分の脚部の前記上面上の前記とげ状鋸
歯が前記リング部分の前記上面よりある高さまで立上がっている上側頂部により
形成され、 前記上側頂部の高さが隣接するとげ状鋸歯上の前記上側の頂部の高さから変化
していること、 前記上側の頂部の高さが、そのとげ状鋸歯が係合する上側の椎骨の輪郭にほぼ
マッチしている円弧内に配置されていること、 さらに、前記リング部分の脚部の前記下面の面の前記とげ状鋸歯が、前記のリ
ング部分の脚部の前記下面から等しい高さを有する頂部(複数)により形成されて
いること、 を特徴とする請求項1の椎骨間のインプラント。 - 【請求項3】 さらに、前記切落し部が挿入用工具を取付けるための開口部
を含むことを特徴とする請求項1の椎骨間のインプラント。 - 【請求項4】 さらに、前記相互接続部分が挿入用工具を取付けるための開
口部を含むことを特徴とする請求項3の椎骨間のインプラント。 - 【請求項5】 各リング部分の脚部の上面および下面の上のとげ状鋸歯の数
が6を超えないことを特徴とする請求項1の椎骨間のインプラント。 - 【請求項6】 相互接続部分の曲率半径が、切落し部と相互接続部分の間の
最大距離の半分を超えないことを特徴とする請求項1の椎骨間のインプラント。 - 【請求項7】 前記切落し部が面取りした上面と下面を含むことを特徴とす
る請求項1の椎骨間のインプラント。 - 【請求項8】 骨移植材料のバッグがリング部分の内部に位置していること
を特徴とする請求項1の椎骨間のインプラント。 - 【請求項9】 前記とげ状鋸歯が平坦な側面を持つことを特徴とする請求項
1の椎骨間のインプラント。 - 【請求項10】 前記リング部分と切落し部分が滑らかな外面を持つことを
特徴とする請求項1の椎骨間のインプラント。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US20793000P | 2000-05-30 | 2000-05-30 | |
US60/207,930 | 2000-05-30 | ||
PCT/US2001/017412 WO2001091686A1 (en) | 2000-05-30 | 2001-05-30 | Implant for placement between cervical vertebrae |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2003534849A true JP2003534849A (ja) | 2003-11-25 |
Family
ID=22772542
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2001587703A Pending JP2003534849A (ja) | 2000-05-30 | 2001-05-30 | 頸椎間に置くインプラント |
Country Status (5)
Country | Link |
---|---|
US (1) | US6635086B2 (ja) |
EP (1) | EP1284707A4 (ja) |
JP (1) | JP2003534849A (ja) |
AU (1) | AU2001266623A1 (ja) |
WO (1) | WO2001091686A1 (ja) |
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- 2001-05-30 AU AU2001266623A patent/AU2001266623A1/en not_active Abandoned
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- 2001-05-30 EP EP01944185A patent/EP1284707A4/en not_active Withdrawn
- 2001-05-30 WO PCT/US2001/017412 patent/WO2001091686A1/en not_active Application Discontinuation
- 2001-05-30 JP JP2001587703A patent/JP2003534849A/ja active Pending
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JP4920594B2 (ja) * | 2004-11-10 | 2012-04-18 | ウォーソー・オーソペディック・インコーポレーテッド | 椎間スペーサ |
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US6635086B2 (en) | 2003-10-21 |
AU2001266623A1 (en) | 2001-12-11 |
WO2001091686A1 (en) | 2001-12-06 |
EP1284707A4 (en) | 2003-06-25 |
EP1284707A1 (en) | 2003-02-26 |
US20020026243A1 (en) | 2002-02-28 |
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