JP4220395B2 - 椎間インプラント - Google Patents
椎間インプラント Download PDFInfo
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- JP4220395B2 JP4220395B2 JP2003569090A JP2003569090A JP4220395B2 JP 4220395 B2 JP4220395 B2 JP 4220395B2 JP 2003569090 A JP2003569090 A JP 2003569090A JP 2003569090 A JP2003569090 A JP 2003569090A JP 4220395 B2 JP4220395 B2 JP 4220395B2
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- intervertebral implant
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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
- 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
- A61F2/4465—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 having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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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
- 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
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- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
- A61B17/8052—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates immobilised relative to screws by interlocking form of the heads and plate holes, e.g. conical or threaded
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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
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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
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- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
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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
- A61F2/4455—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
- A61F2/447—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 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
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- A—HUMAN NECESSITIES
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- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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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
- 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
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
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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
- 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
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- A—HUMAN NECESSITIES
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- 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
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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
- 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
- A61F2002/30777—Oblong apertures
-
- 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
- A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
-
- 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
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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
- 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
- A61F2250/0014—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
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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
- 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
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- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Heart & Thoracic Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Cardiology (AREA)
- Vascular Medicine (AREA)
- Transplantation (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
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Description
従来技術の上記の議論は、発明の背景を説明するためにのみ行われ、引用された従来技術が本出願またはその優先権の時点でも実際に刊行され、または公知であったことを意味するものではない。
第1の構造では、穴の少なくとも1つが雌ねじを有する。その結果、ねじ頭を有する対応する骨ねじがインプラントと剛性に締められうる。
第2の構造では、三次元本体の前面において椎間インプラントの水平中央面に対して垂直に配置されたフロントプレートが付着されており、それを通じて穴が通り抜け、長手方向の固定要素が固定可能となっている。これは、分離された操作ステップにおいてフロントプレートが植込まれる従来技術による2つの部分から成るインプラントに対して、椎間インプラントの植込みがシングルステップであると同時に、容易かつ迅速に実行可能であるという利点を有する。別の利点は、それによって椎間インプラントの固定が可能な限り椎体の前面、すなわち通常、十分な骨材が存在する箇所で行われるという点にある。その結果、前部の移動の制限が得られ、それによって従来技術による椎間インプラントでの場合に比べ周辺の構造に対する大きな危険が生じることはない。負荷は椎間インプラントによって圧縮下に依然として受け入れられ、フロントプレートまたは固定ねじによっては受け入れられない。
さらに別の実施形態では、別の材料によるフロントプレートが三次元本体として製造されている。
さらに別の実施形態では、少なくとも1つの穴が下面に対してテーパ状に縮小し、そのため骨ねじが対応する円錐頭部とその中で剛性に固定されうる。円錐形の穴は、結果として生じる摩擦角よりも小さい円錐角を有することが好ましい。円錐形の穴にテーパ角は、1:3.75〜1:20.00、好ましくは、1:5〜1:15であることが適切である。
椎間インプラントの上面および/または下面は平面ではなく、好ましくは凸状に形成されていることが適切である。それによって隣接した椎体の終板への良好な適合を達成することができる。
穴は椎間インプラントの左右の側面を貫通しないことが好ましい。前面も穴から横断されないことが有利である。
別の好ましい実施形態では、穴の少なくとも2つが前面から見ると分岐して走っている。それによって、その中心に比べて良好な骨の質を示す椎体の範囲へ骨ねじで達せられる。水平の中央面に対する穴の軸は、25°〜70°、好ましくは35°〜55°の範囲の角度を有することが適切である。それによって、ねじの取入れ時の良好な通路が得られる。
状況に応じて、2つ、3つ、4つもしくはそれ以上の長手方向の固定要素を剛性に椎間インプラントと結合することができ、少なくとも1つの固定要素が椎間インプラントの上面を、少なくとも1つの固定要素がその下面を突き通すことが適切である。
長手方向の固定要素は、頭部と軸を有する骨ねじの形で使用されることが好ましく、ここで頭部は、椎間インプラントの穴の雌ねじに対応する雄ねじを備えていることが好ましい。第2の可能な剛性の結合方法では、骨ねじを使用できることが好ましく、ここで頭部は軸に対してテーパ状に縮小し、頭部の円錐角が椎間インプラントの穴の円錐角に対応する。
骨ねじとして形成された長手方向の固定要素は、自己貫通し、かつ自己切断する雄ねじを有することが好ましい。長手方向の固定要素は、好ましくはトロカールの形でビットを備えているねじのない円筒形のピンとしても形成されうる。
別の変形は、長手方向の固定要素がコイルバネとして形成されており、最終的に長手方向の固定要素は単一または複数の翼を有するコイルブレードとしても形成されうる。
さらに別の実施形態では、長手方向の固定要素の先端部は椎間インプラントの本体内に固定可能であるため、長手方向の固定要素の頭部は隣接した椎体内に固定可能である。
さらに別の実施形態では、長手方向の固定要素の頭部は拡大された直径を有し、さらに椎体への設置のために規定されている頭部用の受け板が備えられている。
さらに別の実施形態では、穴は、金属の長手方向の固定要素のねじ頭が刻み目を付けられ、成形されうる平滑な雌ねじを有しうる。
図1〜図4に示されている椎間インプラントは、その両方が2つの隣接した椎体の終板への設置のために規定されている凸状に湾曲した上面1と、同じく凸状に湾曲した下面2とを有する三次元本体10から成る。良好な固定のために、上面1および下面2は構造化されうるとともに、溝、リブ、または歯を備えることができ、またはざらざらにされた上面のみを有しうる。
三次元本体10は、さらに左側面3および右側面4のほか、前面5および後面6を有する。本体10は、中空でも形成されうるとともに、その被覆面はミシン目を備えることができる。
穴9の軸19は、上面1と下面2との間に配置されている水平の中央面7を切離す。
穴9の少なくとも1つは、その中に受入れられた長手方向の固定要素20が剛性に椎間インプラントと結合可能であるように形成されている。このために穴9は円錐形に形成されている。
固定要素20は、好ましくは、頭部21および先端部22を有する骨ねじである。頭部21は軸23に対してテーパ状に短縮し、ここで頭部21のテーパ角は穴9のテーパ角に対応する。さらに4つの穴9は、雌ねじ11を有する。
図5〜7に示されている変形では、三次元本体10はその前面5において、その中で固定要素20が固定されうる好ましくは金属の挿入物8を有する。この場合、挿入物8は三次元本体10内で垂直方向に可動式に配置されている。
3 左側面 4 右側面
5 前面 6 後面
7 中央面 8 フロントプレート
9 穴 10 三次元本体
11 雌ねじ 19 軸
20 固定要素 21 頭部
22 先端部 23 軸
25 雄ねじ
Claims (34)
- 三次元本体(10)の形の椎間インプラントであって、
A)2つの隣接した椎体の終板への設置に適した上面(1)および下面(2)と、
B)左側面(3)および右側面(4)と、
C)前面(5)および後面(6)と、
D)前記上面(1)と前記下面(2)との間に位置する水平の中央面(7)と、
E)長手方向の固定要素(20)を受入れるために適しており、かつ前記水平の中央面(7)を切離す軸(19)を含む本体(10)を貫通する複数の穴(9)と
を有し、ここで
F)前記穴(9)の少なくとも1つが、その中に受入れられた前記長手方向の固定要素(20)が剛性に椎間インプラントと結合可能であるように形成されている前記椎間インプラントにおいて、
G)前記三次元本体(10)がその前面(5)において前記水平の中央面(7)に対して垂直に配置され、挿入物として形成されるフロントプレート(8)を有し、その中を前記穴(9)が貫通し、かつその中で前記長手方向の固定要素(20)が固定可能であることを特徴とする椎間インプラント。 - 前記三次元本体(10)内の前記フロントプレート(8)が前記中央面(7)に対して垂直に可動式に配置されていることを特徴とする請求項1に記載の椎間インプラント。
- 前記フロントプレート(8)が前記三次元本体(10)と別の材料で製造されていることを特徴とする請求項1または2に記載の椎間インプラント。
- 前記フロントプレート(8)が金属製であることを特徴とする、請求項3に記載の椎間インプラント。
- 前記穴(9)の少なくとも1つが雌ねじ(11)を有することを特徴とする請求項1〜4のいずれか1つに記載の椎間インプラント。
- 少なくとも1つの前記穴(9)が前記下面(2)に対してテーパ状に縮小することを特徴とする請求項1〜5のいずれか1つに記載の椎間インブラント。
- 円錐形の前記穴(9)が、結果として生じる摩擦角よりも小さい円錐角を有することを特徴とする請求項6に記載の椎間インプラント。
- 円錐形の前記穴(9)のテーパ角が1:3.75〜1:20.00、好ましくは、1:5〜1:15であることを特徴とする請求項7に記載の椎間インプラント。
- その各側面(1、2、3、4、5、6)が実質的にすべて凸状に形成されていることを特徴とする請求項1〜8のいずれか1つに記載の椎間インプラント。
- 前記上面(1)および/または前記下面(2)が平坦ではなく、凸状に形成されていることを特徴とする請求項1〜9のいずれか1つに記載の椎間インプラント。
- 前記穴(9)が、前記左側面(3)および前記右側面(4)を突き通さないことを特徴とする請求項1〜10のいずれか1つに記載の椎間インプラント。
- 前記穴(9)の少なくとも2つが平行に走っていることを特徴とする請求項1〜11のいずれか1つに記載の椎間インプラント。
- 前記穴(9)の少なくとも2つが前記前面(1)から見ると分岐して走っていることを特徴とする請求項1〜12のいずれか1つに記載の椎間インプラント。
- 前記穴(9)の軸(19)が前記水平の中央面(7)に対して25゜〜70゜、好ましくは35゜〜55゜の範囲の角度を含めることを特徴とする請求項1〜13のいずれか1つに記載の椎間インプラント。
- 前記穴(9)が前記水平の中央面(7)を突き通さないことを特徴とする請求項1〜14のいずれか1つに記載の椎間インプラント。
- 頭部(21)と先端部(22)とともに前記穴(9)に導入される少なくとも2つの長手方向の固定要素(20)を有する、請求項1〜15のいずれか1つに記載の椎間インプラントにおいて、少なくとも1つの前記長手方向の固定要素(20)が前記上面(1)を、少なくとも1つの前記長手方向の固定要素(20)が前記下面(20)を突き通すことを特徴とする椎間インプラント。
- 前記長手方向の固定要素(20)が前記頭部(21)および軸(23)を有する骨ねじとして形成されていることを特徴とする請求項16に記載の椎間インプラント。
- 前記頭部(21)が、前記穴(9)の前記雌ねじ(11)と対応している雄ねじ(24)を備えていることを特徴とする請求項17に記載の椎間インプラント。
- 前記頭部(21)が前記軸(23)に対してテーパ状に短縮し、ここで前記頭部(21)のテーパ角が前記穴(9)のテーパ角に対応することを特徴とする請求項17または18に記載の椎間インプラント。
- 少なくとも2つの前記長手方向の固定要素(20)が前記上面(1)を、少なくとも2つの前記長手方向の固定要素(20)が前記下面を突き通すことを特徴とする請求項16〜19のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)が、その軸が自己貫通し、かつ自己切断する雄ねじ(25)を備えている骨ねじとして形成されていることを特徴とする請求項16〜20のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)が、トロカールの形でビットを備えているねじのない円筒型のピンとしても形成されていることを特徴とする請求項16〜21のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)がコイルバネとして形成されていることを特徴とする請求項16〜21のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)が単一または複数の翼を有するコイルブレードとして形成されていることを特徴とする請求項16〜21のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)の前記先端部(22)が前記本体(10)内に固定可能であるため、前記長手方向の固定要素(20)の前記頭部(21)が隣接した椎体内に固定可能であることを特徴とする請求項16〜24のいずれか1つに記載の椎間インプラント。
- 前記長手方向の固定要素(20)の前記頭部(21)が拡大された直径を有し、椎体への設置のために適している前記頭部(21)用の受け板(30)が備えられていることを特徴とする請求項25に記載の椎間インプラント。
- 前記本体(10)がプラスチックから成ることを特徴とする請求項16〜26のいずれか1つに記載の椎間インプラント。
- 前記骨ねじ(20)の前記雄ねじ(25)が、11°〜14°、好ましくは12°〜13°の範囲の負荷ねじ山角を有することを特徴とする請求項27に記載の椎間インプラント。
- 前記骨ねじの前記雄ねじ(25)が、6°〜10°、好ましくは7°〜9°の範囲の傾斜角を有することを特徴とする請求項16〜28のいずれか1つに記載の椎間インプラント。
- 前記穴(9)が前記雌ねじ(11)を有する金属チューブであることを特徴とする請求項1〜29のいずれか1つに記載の椎間インプラント。
- 部分的にプラスチックから成り、かつ前記穴(9)の範囲では金属から成ることを特徴とする請求項1〜30のいずれか1つに記載の椎間インプラント。
- 前記穴(9)が、金属の前記長手方向の固定要素(20)のねじ頭が刻み目を付けられ、又は成形されうる平滑な雌ねじを有することを特徴とする請求項27〜31のいずれか1つに記載の椎間インプラント。
- 前記上面(1)および下面(2)が構造化を歯の形で備えられていることを特徴とする請求項1〜32のいずれか1つに記載の椎間インプラント。
- その被覆面が、ミシン目が備えられている中空本体として形成されていることを特徴とする請求項1〜33のいずれか1つに記載の椎間インプラント。
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