JPH05269160A - Bone filling-up material - Google Patents

Bone filling-up material

Info

Publication number
JPH05269160A
JPH05269160A JP5034510A JP3451093A JPH05269160A JP H05269160 A JPH05269160 A JP H05269160A JP 5034510 A JP5034510 A JP 5034510A JP 3451093 A JP3451093 A JP 3451093A JP H05269160 A JPH05269160 A JP H05269160A
Authority
JP
Japan
Prior art keywords
bone
screw
vertebral bodies
hollow member
cylindrical body
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
Application number
JP5034510A
Other languages
Japanese (ja)
Inventor
Hiromi Matsuzaki
浩巳 松崎
Satoshi Kojima
聡 小島
Masafumi Nakamura
雅史 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Publication of JPH05269160A publication Critical patent/JPH05269160A/en
Pending legal-status Critical Current

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
    • A61F2/446—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 elliptical cross-section substantially parallel to the axis of the spine, e.g. cylinders or frustocones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/02—Inorganic materials
    • A61L27/04—Metals or alloys
    • A61L27/06—Titanium or titanium alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/02—Inorganic materials
    • A61L31/022—Metals or alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7059—Cortical plates
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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
    • 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
    • A61F2/30721—Accessories
    • A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
    • A—HUMAN NECESSITIES
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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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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30224—Three-dimensional shapes cylindrical
    • A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
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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
    • 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
    • A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • 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
    • A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • 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
    • 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
    • A61F2002/30784—Plurality of holes
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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
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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
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    • A—HUMAN NECESSITIES
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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
    • A61F2/30767—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
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
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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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
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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
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
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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
    • 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
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite
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    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2430/00—Materials or treatment for tissue regeneration
    • A61L2430/38—Materials or treatment for tissue regeneration for reconstruction of the spine, vertebrae or intervertebral discs

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Biomedical Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Inorganic Chemistry (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Epidemiology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Surgery (AREA)
  • Cardiology (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

PURPOSE:To stably fix vertebral bodies positioned in the upper and the lower parts of the resected intervertebral disk against force in the compression tensile direction and the direction being orthogonal to the compression tensile direction, in the case the intervertebral disk which becomes a disorder is resected, in a vertebra disease such as hernia of the intervertebral disk, etc. CONSTITUTION:The bone filling-up material is embedded extending over vertebral bodies 3, 3 positioned in the upper and the lower parts of the resected intervertebral disk, and provided with a hollow member 5 for positioning opposed parts 307, 307 of the vertebral bodies 3, 3 position in the upper and the lower parts of the resected intervertebral disk in its inside, and fixing means 9, 503 for fixing the hollow member 5 to the vertebral bodies 3, 3.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、頸椎や腰椎等におい
て、障害となった椎間板を切除した際に用いる骨補填材
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bone substitute material used when an injured intervertebral disc is resected in the cervical vertebrae, the lumbar spine or the like.

【０００２】[0002]

【従来の技術】例えば、椎間板ヘルニア等の脊椎疾患に
対する手術の一つとして、患者の前方（正面側）から障
害となった椎間板を切除し、この切除した椎間板の上下
に位置する椎体間に骨補填材を挿入する方法が用いられ
ている。そして、このような骨補填材として、患者の腸
骨から採取した自家骨や、アルミナやハイドロキシアパ
タイト等の所謂バイオセラミックスからなる骨補填材が
使用されている。2. Description of the Related Art For example, as one of the operations for spinal disorders such as disc herniation, the intervertebral disc that has been obstructed is excised from the front (front side) of the patient, and the intervertebral bodies located above and below the excised disc are separated. A method of inserting a bone substitute material is used. As such a bone filling material, an autogenous bone collected from the iliac bone of a patient or a bone filling material made of so-called bioceramics such as alumina and hydroxyapatite is used.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、従来の
方法は、切除した椎間板の上下に位置する椎体の向かい
合う部分を切除し、その部分に患者の前方から骨補填材
を嵌挿する方法で、椎間板を除去した空間を骨補填材で
埋める方法である。そのため、従来の方法では、圧縮方
向の力に対しては上下の椎体を固定できるものの、引張
方向や圧縮引張方向と直交する方向の力に対しては上下
の椎体を固定し難い。本発明は前記事情に鑑み案出され
たものであって、本発明の目的は、圧縮引張方向及び圧
縮引張方向と直交する方向の力に対して上下の椎体を安
定して固定できる骨補填材を提供することにある。However, the conventional method is a method in which the opposing parts of the vertebral bodies located above and below the resected intervertebral disc are excised, and a bone prosthesis is inserted into that part from the front of the patient. This is a method of filling the space from which the intervertebral disc is removed with a bone substitute material. Therefore, according to the conventional method, the upper and lower vertebral bodies can be fixed against the force in the compression direction, but it is difficult to fix the upper and lower vertebral bodies against the force in the tensile direction or the direction orthogonal to the compressive tension direction. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide bone replacement capable of stably fixing upper and lower vertebral bodies against a force in the compression tension direction and a force in a direction orthogonal to the compression tension direction. Is to provide wood.

【０００４】[0004]

【課題を解決するための手段】上記目的を達成するため
に本発明に係る骨補填材は、切除した椎間板の上下に位
置する椎体にわたって埋め込まれ、切除した椎間板の上
下に位置する椎体の向かい合う部分をその内部に位置さ
せる中空状の部材と、前記中空状の部材を椎体に固定す
る固定手段とを備えることを特徴とする。また、本発明
は、前記中空状の部材が円筒状を呈し、前記固定手段
は、中空状の部材の外周に形成されたねじを含んで構成
されていることを特徴とする。また、本発明は、前記中
空状の部材の端部にはフランジが設けられ、前記固定手
段は、前記フランジを挿通し椎体に結合されるねじを含
んで構成されていることを特徴とする。また、本発明
は、前記フランジが前記中空状の部材と一体に形成され
ていることを特徴とする。また、本発明は、前記フラン
ジが前記中空状の部材と別体に形成されていることを特
徴とする。また、本発明は、前記中空状の部材には、該
中空状の部材の内部と外部を連通する多数の孔が形成さ
れていることを特徴とする。In order to achieve the above object, the bone prosthesis material according to the present invention is embedded over the vertebral bodies located above and below the excised intervertebral disc, and is applied to the vertebral bodies located above and below the excised disc. It is characterized in that it is provided with a hollow member in which the facing parts are located inside and a fixing means for fixing the hollow member to the vertebral body. Further, the present invention is characterized in that the hollow member has a cylindrical shape, and the fixing means includes a screw formed on the outer periphery of the hollow member. Further, the present invention is characterized in that a flange is provided at an end of the hollow member, and the fixing means includes a screw which is inserted through the flange and is coupled to a vertebral body. .. Further, the present invention is characterized in that the flange is formed integrally with the hollow member. Further, the invention is characterized in that the flange is formed separately from the hollow member. Further, the present invention is characterized in that the hollow member is formed with a large number of holes communicating the inside and the outside of the hollow member.

【０００５】[0005]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。図１は第１実施例に係る骨補填材の使用状態の断
面側面図、図２は同・正面図を示す。１は脊髄、３は椎
体であり、障害となった椎間板を切除した部分で、この
部分に隣接する上下の椎体３，３にわたって骨補填材５
が埋め込まれ、骨補填材５はプレート７及び二本のねじ
９により上下の椎体３，３に固定されている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional side view of the bone prosthesis material according to the first embodiment in use, and FIG. Reference numeral 1 is a spinal cord, 3 is a vertebral body, and is a portion obtained by cutting off an injured intervertebral disc.
The bone filling material 5 is fixed to the upper and lower vertebral bodies 3, 3 by the plate 7 and the two screws 9.

【０００６】骨補填材５は図３に側面図で、図４に断面
側面図で、図５に正面図で示すように、円筒体５０１
と、この円筒体５０１の外周に形成された台形ねじ５０
３とで構成され、前記円筒体５０１の長さは図１に示す
ように、上下の椎体３，３にわたって埋め込まれた状態
で脊髄１側に椎体部分３１１が残る寸法で形成され、円
筒体５０１には、該円筒体５０１の内部と外部を連通す
る多数の孔５０５が貫設されている。また、前記台形ね
じ５０３を構成するねじ山には、図５に示すように、円
筒体５０１の一方の端面から見て周方向に等間隔をおき
六つのねじ孔５０７が、円筒体５０１の軸心に平行に各
ねじ山を貫通させて形成されている。このような構成か
らなる骨補填材５はチタン合金により形成され、リン酸
カルシウム系化合物でコーティングされており、実施例
ではハイドロキシアパタイト多孔体が用いられている。As shown in the side view of FIG. 3, the sectional side view of FIG. 4, and the front view of FIG.
And a trapezoidal screw 50 formed on the outer periphery of the cylindrical body 501.
As shown in FIG. 1, the length of the cylindrical body 501 is formed such that the vertebral body portion 311 remains on the spinal cord 1 side in a state of being embedded over the upper and lower vertebral bodies 3, 3. The body 501 is provided with a large number of holes 505 which communicate the inside and the outside of the cylindrical body 501. Further, as shown in FIG. 5, in the screw thread forming the trapezoidal screw 503, six screw holes 507 are arranged at equal intervals in the circumferential direction when viewed from one end face of the cylindrical body 501, and the six screw holes 507 are formed on the shaft of the cylindrical body 501. It is formed by penetrating each thread parallel to the core. The bone filling material 5 having such a structure is formed of a titanium alloy and is coated with a calcium phosphate-based compound. In the examples, a hydroxyapatite porous body is used.

【０００７】前記プレート７は、図６に正面図で、図７
に断面側面図で示すように、小径の筒部７０１と、その
端部の円形のフランジ部７０３とで構成されている。前
記筒部７０１の外径は、前記円筒体５０１の内周面に嵌
合する大きさで形成され、また、フランジ部７０３の外
径は前記台形ねじ５０３の外径とほぼ同じ寸法で形成さ
れ、フランジ部７０３には、前記ねじ孔５０７に対応し
た大きさのねじ挿通孔７０５が周方向に前記ねじ孔５０
７の間隔と同一の間隔をおいて形成されている。このよ
うな構成からなるプレート７はチタン合金により形成さ
れ、リン酸カルシウム系化合物でコーティングされてお
り、実施例ではハイドロキシアパタイト多孔体が用いら
れている。The plate 7 is shown in front view in FIG.
As shown in the sectional side view, it is composed of a small-diameter cylindrical portion 701 and a circular flange portion 703 at the end thereof. The outer diameter of the cylindrical portion 701 is formed to fit into the inner peripheral surface of the cylindrical body 501, and the outer diameter of the flange portion 703 is formed to be substantially the same as the outer diameter of the trapezoidal screw 503. The flange portion 703 is provided with a screw insertion hole 705 having a size corresponding to the screw hole 507 in the circumferential direction.
It is formed at the same interval as the interval of 7. The plate 7 having such a structure is formed of a titanium alloy and is coated with a calcium phosphate-based compound. In the examples, a hydroxyapatite porous body is used.

【０００８】前記ねじ９は、図１に示すように、ねじ部
９０１と頭部９０３とで構成されている。前記ねじ部９
０１は前記台形ねじ５０３のねじ孔５０７に螺合するよ
うに形成され、また、長さは、図１に示すように、フラ
ンジ部７０３のねじ挿通孔７０５から挿通され、骨補填
材５の先端に至る寸法で形成されている。このような構
成からなるねじ９はチタン合金により形成され、リン酸
カルシウム系化合物でコーティングされており、実施例
ではハイドロキシアパタイト多孔体が用いられている。
尚、本実施例ではプレート７が特許請求の範囲における
フランジに相当し、台形ねじ５０３や二本のねじ９が固
定手段に相当している。As shown in FIG. 1, the screw 9 is composed of a screw portion 901 and a head portion 903. The screw part 9
01 is formed so as to be screwed into the screw hole 507 of the trapezoidal screw 503, and the length thereof is inserted from the screw insertion hole 705 of the flange portion 703 as shown in FIG. It is formed with dimensions up to. The screw 9 having such a configuration is formed of a titanium alloy and is coated with a calcium phosphate-based compound. In the examples, a hydroxyapatite porous body is used.
In this embodiment, the plate 7 corresponds to the flange in the claims, and the trapezoidal screw 503 and the two screws 9 correspond to the fixing means.

【０００９】次に、障害となった椎間板を切除し、この
切除した椎間板の上下に位置する椎体３，３を骨補填材
５で固定する手順を図１を参照して説明する。まず、椎
間板を切除した椎間板の上下に位置する椎体３，３にわ
たり、円筒体５０１が嵌装される寸法の環状の溝３０１
を形成する。また、環状の溝３０１の外周部に、台形ね
じ５０３が螺合されるねじ溝３０３を形成する。また、
前記台形ねじ５０３のねじ孔５０７よりも小さい寸法の
小孔を、上下の椎体３，３に前記ねじ９の長さに対応し
た長さで夫々形成しておく。尚、この小孔の位置は、後
述するように、骨補填材５を回転させて円筒体５０１を
環状の溝３０１に嵌装した時、図１に示すように、六つ
のねじ孔５０７のうち二つのねじ孔５０７が脊髄１の延
出方向にそった位置に対応させる。更に、上下に位置す
る椎体３，３の向かい合う部分に、前記プレート７の筒
部７０１が嵌装され収容される凹部３０５を形成する。Next, a procedure for cutting off an intervertebral disc which has become an obstacle and fixing the vertebral bodies 3, 3 located above and below the cut intervertebral disc with the bone filling material 5 will be described with reference to FIG. First, an annular groove 301 having a size in which the cylindrical body 501 is fitted over the vertebral bodies 3 and 3 located above and below the intervertebral disc in which the intervertebral disc is removed.
To form. Further, a screw groove 303 into which the trapezoidal screw 503 is screwed is formed on the outer peripheral portion of the annular groove 301. Also,
Small holes having a size smaller than the screw hole 507 of the trapezoidal screw 503 are formed in the upper and lower vertebral bodies 3, 3 respectively with a length corresponding to the length of the screw 9. As will be described later, the position of this small hole is such that when the bone filling material 5 is rotated to fit the cylindrical body 501 into the annular groove 301, as shown in FIG. 1, among the six screw holes 507. The two screw holes 507 correspond to the positions along the extending direction of the spinal cord 1. Further, a concave portion 305 in which the tubular portion 701 of the plate 7 is fitted and accommodated is formed in a portion where the vertebral bodies 3 and 3 located above and below face each other.

【００１０】次いで、ねじ溝３０３に台形ねじ５０３を
螺合させ、骨補填材５を回転させつつ円筒体５０１を環
状の溝３０１に嵌装し、骨補填材５の端面が僅かに椎体
３，３の側部上に位置するまで骨補填材５を両椎体３，
３にわたって埋め込み、これにより、円筒体５０１の内
部には、上下の椎体３，３の向かい合う部分３０７，３
０７が残存する。そして、六つのねじ孔５０７のうち二
つのねじ孔５０７を前記小孔に夫々合わせ、骨補填材５
の回転を停止する。Next, a trapezoidal screw 503 is screwed into the thread groove 303, the cylindrical body 501 is fitted into the annular groove 301 while rotating the bone filling material 5, and the end face of the bone filling material 5 is slightly vertebral body 3. , 3 until the bone prosthesis 5 is placed on both sides of the vertebral body 3,
3 so that inside the cylindrical body 501, the facing portions 307, 3 of the upper and lower vertebral bodies 3, 3
07 remains. Then, two screw holes 507 of the six screw holes 507 are aligned with the small holes, respectively, and the bone filling material 5
Stop rotating.

【００１１】次いで、円筒体５０１の内周面に筒部７０
１を嵌装して筒部７０１を凹部３０５に収容し、プレー
ト７のねじ挿通孔７０５を前記ねじ孔５０７、小孔に合
わせる。次いで、二本のねじ９を、夫々対応するねじ挿
通孔７０５から前記ねじ孔５０７、小孔にねじ込み、頭
部９０３がプレート７に当接するまでねじ込んで手術を
終了する。Next, the cylindrical portion 70 is formed on the inner peripheral surface of the cylindrical body 501.
1 is fitted to accommodate the cylindrical portion 701 in the recess 305, and the screw insertion hole 705 of the plate 7 is aligned with the screw hole 507 and the small hole. Next, the two screws 9 are screwed into the screw holes 507 and the small holes from the corresponding screw insertion holes 705, and screwed until the head 903 comes into contact with the plate 7, and the operation is completed.

【００１２】本実施例によれば、骨補填材５が、切除し
た椎間板の上下の椎体３，３にわたって埋め込み固定さ
れ、且つ、骨補填材５の円筒体５０１の内部に、上下の
椎体３，３の向かい合う部分３０７，３０７が残存して
いるので、上下に位置する椎体３，３に作用する圧縮引
張方向及び圧縮引張方向と直交する方向の力を骨補填材
５により受けることができ、従って、圧縮引張方向及び
圧縮引張方向と直交する方向の力が上下の椎体３，３に
作用しても骨補填材５により上下の椎体３，３を安定し
て固定することができる。また、骨補填材５の円筒体５
０１の内部に、上下の椎体３，３の向かい合う部分３０
７，３０７が残存しているので、双方の残存部分３０
７，３０７の骨組織が成長して骨融合がなされ、上下の
椎体３，３を安定して固定する上で有利となる。According to the present embodiment, the bone prosthesis 5 is embedded and fixed over the upper and lower vertebral bodies 3, 3 of the excised disc, and the upper and lower vertebral bodies are provided inside the cylindrical body 501 of the bone prosthetic material 5. Since the facing portions 307 and 307 of the bones 3 and 3 remain, the bone prosthesis 5 can receive the force in the compression tension direction acting on the vertebral bodies 3 and 3 located above and below and the direction orthogonal to the compression tension direction. Therefore, even if a force in the compression tension direction and a force in a direction orthogonal to the compression tension direction act on the upper and lower vertebral bodies 3, 3, the upper and lower vertebral bodies 3, 3 can be stably fixed by the bone prosthetic material 5. it can. In addition, the cylindrical body 5 of the bone filling material 5
01, inside the vertebral bodies 3, 3 facing each other 30
Since 7,307 remains, both remaining parts 30
Bone tissue of 7,307 grows and bone fusion is performed, which is advantageous in stably fixing the upper and lower vertebral bodies 3, 3.

【００１３】また、骨補填材５の円筒体５０１に多数の
孔５０５を形成したので、孔５０５に骨が侵入して、骨
補填材５の円筒体５０１の内部に残存した部分３０７と
円筒体５０１の外側に位置する椎体部分３１３との骨融
合がなされ、これにより上下の椎体３，３をより一層安
定して固定することができる。この場合、円筒体５０１
を生体親和性に優れるリン酸カルシウム系化合物でコー
ティングしているので、孔５０５に骨組織が侵入し易
く、円筒体５０１の内部に残存した部分３０７と円筒体
５０１の外側に位置する椎体部分３１３部分とを骨融合
させる上で有利となる。Further, since a large number of holes 505 are formed in the cylindrical body 501 of the bone prosthetic material 5, bone penetrates into the holes 505 and the portion 307 remaining inside the cylindrical body 501 of the bone prosthetic material 5 and the cylindrical body Bone fusion with the vertebral body portion 313 located outside the 501 is performed, whereby the upper and lower vertebral bodies 3, 3 can be more stably fixed. In this case, the cylindrical body 501
Is coated with a calcium phosphate-based compound having excellent biocompatibility, bone tissue easily enters the hole 505, and the portion 307 remaining inside the cylindrical body 501 and the vertebral body portion 313 located outside the cylindrical body 501 It is advantageous for the bone fusion of and.

【００１４】また、骨補填材５、プレート７、ねじ９を
全てチタン合金で形成し、リン酸カルシウム系化合物で
コーティングしてるので、軽量化が図れ、また、リン酸
カルシウム系化合物は骨融合性に優れるので、これら部
材５，７，９の表面と椎体３との骨融合がなされ、骨補
填材５を上下の椎体３，３にわたり確実に固定できる。
また、実施例では、プレート７とねじ９を用いているの
で、骨補填材５の強度、剛性がこれら部材７，９により
高められ、上下の椎体３，３を安定して固定する上で有
利となる。Further, since the bone filling material 5, the plate 7, and the screw 9 are all formed of a titanium alloy and coated with a calcium phosphate-based compound, the weight can be reduced, and the calcium phosphate-based compound is excellent in bone fusion. Bone fusion between the surfaces of these members 5, 7, 9 and the vertebral body 3 is performed, and the bone prosthetic material 5 can be reliably fixed over the upper and lower vertebral bodies 3, 3.
Further, in the embodiment, since the plate 7 and the screw 9 are used, the strength and the rigidity of the bone prosthetic material 5 are enhanced by these members 7 and 9, and the upper and lower vertebral bodies 3 and 3 are stably fixed. Be advantageous.

【００１５】図８はプレート７の変形例を示す。この変
形例では、椎体３の形状に合わせてフランジ部７０３を
円筒面で形成したものであり、このプレート７１を用い
る場合には、フランジ部７０３に当接する骨補填材５の
端面に、該フランジ部７０３に係合する円筒面を形成し
ておく。このようなプレート７１を用いれば、プレート
７１の突出量が小さくなり、小さなスペースに配設でき
る。FIG. 8 shows a modification of the plate 7. In this modified example, the flange portion 703 is formed in a cylindrical surface according to the shape of the vertebral body 3, and when this plate 71 is used, the end surface of the bone prosthetic material 5 that abuts the flange portion 703 is A cylindrical surface that engages with the flange portion 703 is formed. If such a plate 71 is used, the amount of protrusion of the plate 71 can be reduced and the plate 71 can be arranged in a small space.

【００１６】尚、上下の椎体３，３の向かい合う部分３
０７，３０７の間に、例えば、骨融合性材料、或は生体
親和性材料からなるスペーサを挿入した状態で、骨補填
材５を埋め込むようにしてもよい。また、実施例では、
骨補填材５を固定し、骨補填材５の強度、剛性を高める
ため、プレート７とねじ９を用いた場合について説明し
たが、プレート７とねじ９は用いなくともよい。例え
ば、骨補填材５の固定方法は種々考えられ、単に円筒体
５０１の外周に形成したねじにより骨補填材５を固定し
てもよく、或は、円筒体５０１の端部にフランジを形成
し、このフランジを挿通させ椎体３に螺合させたねじに
より骨補填材５を固定してもよい。また、プレート７や
ねじ９を用いなくても、円筒体５０１の肉厚を大きくす
ることで、或は、円筒体５０１の材料を変えることで、
骨補填材５の強度、剛性を高めることができる。更に、
骨補填材５は円筒形に限定されず、例えば、中空状の矩
形であってもよい。次に、円筒体の端部にフランジを一
体に形成した第２乃至第４実施例について説明する。It should be noted that the facing portions 3 of the upper and lower vertebral bodies 3, 3
The bone filling material 5 may be embedded between 07 and 307 with a spacer made of, for example, an osteointegrative material or a biocompatible material, inserted. Also, in the example,
The case where the plate 7 and the screw 9 are used in order to fix the bone prosthetic material 5 and enhance the strength and rigidity of the bone prosthetic material 5 has been described, but the plate 7 and the screw 9 may not be used. For example, various methods for fixing the bone prosthetic material 5 are conceivable. The bone prosthetic material 5 may be simply fixed by a screw formed on the outer periphery of the cylindrical body 501, or a flange is formed at the end of the cylindrical body 501. The bone prosthesis material 5 may be fixed by a screw that is inserted through the flange and screwed into the vertebral body 3. Further, without using the plate 7 and the screw 9, by increasing the wall thickness of the cylindrical body 501 or changing the material of the cylindrical body 501,
The strength and rigidity of the bone filling material 5 can be increased. Furthermore,
The bone filling material 5 is not limited to a cylindrical shape, and may be, for example, a hollow rectangular shape. Next, second to fourth embodiments in which a flange is integrally formed at the end of the cylindrical body will be described.

【００１７】図９乃至図１１を参照して第２実施例につ
いて説明すると、第２実施例に係る骨補填材２１は円筒
体２５と円筒体２５の端部に形成されたフランジ２７と
で構成され、この円筒体２５の外周にはねじ２５０１が
形成されている。前記円筒体２５の長さは、前記第１実
施例と同様に、上下の椎体３，３にわたって埋め込まれ
た状態で脊髄１側に椎体部分３１１が残る寸法で形成さ
れ、円筒体２５には、該円筒体２５の内部と外部を連通
する多数の孔２５０２が貫設されている。前記円筒体２
５の外周の先部には、上下の椎体３，３にわたり埋め込
まれ易いように先細り状のテーパ面２５０３が形成され
ている。前記フランジ２７は矩形状を呈し、その四隅に
夫々ねじ孔２７０１が形成され、また、前記フランジ２
７の上面の両側には、図１１に示すように、円筒面２７
０３が形成されている。前記ねじ孔２７０１にはねじ２
９が螺合され、このねじ２９が上下の椎体３，３に結合
される。上記構成からなる骨補填材２１及びねじ２９
は、チタン合金で形成されており、燐酸カルシウムで被
覆されていない。尚、本実施例ではねじ２５０１、ねじ
２９が固定手段に相当している。The second embodiment will be described with reference to FIGS. 9 to 11. The bone filling material 21 according to the second embodiment is composed of a cylindrical body 25 and a flange 27 formed at the end of the cylindrical body 25. A screw 2501 is formed on the outer circumference of the cylindrical body 25. As in the first embodiment, the length of the cylindrical body 25 is formed such that the vertebral body portion 311 remains on the spinal cord 1 side in a state of being embedded over the upper and lower vertebral bodies 3, 3. Is provided with a large number of holes 2502 which communicate the inside and the outside of the cylindrical body 25. The cylindrical body 2
A tapered taper surface 2503 is formed at the tip of the outer periphery of 5 so as to be easily embedded in the upper and lower vertebral bodies 3, 3. The flange 27 has a rectangular shape, and screw holes 2701 are formed at four corners of the flange 27.
On both sides of the upper surface of 7, as shown in FIG.
03 is formed. Screw 2 in the screw hole 2701
9 is screwed and the screw 29 is connected to the upper and lower vertebral bodies 3, 3. Bone prosthesis material 21 and screw 29 having the above structure
Is made of a titanium alloy and is not coated with calcium phosphate. In this embodiment, the screw 2501 and the screw 29 correspond to the fixing means.

【００１８】次に、障害となった椎間板を切除し、この
切除した椎間板の上下に位置する椎体３，３を骨補填材
２１で固定する手順を説明する。まず、椎間板を切除し
た椎間板の上下に位置する椎体３，３にわたり、前記第
１実施例と同様に、円筒体２５が嵌装される寸法の環状
の溝を形成する。次いで、骨補填材２１を回転させつつ
円筒体２５を環状の溝に嵌装し、骨補填材２１を両椎体
３，３にわたって埋め込む。この場合、環状の溝に予め
雌ねじを形成しておいてもよく、或は、円筒体２５によ
りねじを切りつつ該円筒体２５を環状の溝に嵌装させる
ようにしてもよい。そして、円筒体２５を埋め込んだの
ち、フランジ２７のねじ孔２７０１に合致する椎体部分
にこのねじ孔２７０１よりも小径の小孔を開け、これら
ねじ孔２７０１及び小孔にねじ２９を埋め込む。尚、こ
の小孔は、前記環状の溝を上下の椎体３，３に形成する
際に予め形成しておいてもよい。Next, a procedure for cutting off the intervertebral disc which has become an obstacle and fixing the vertebral bodies 3, 3 located above and below the cut intervertebral disc with the bone filling material 21 will be described. First, an annular groove having a size in which the cylindrical body 25 is fitted is formed over the vertebral bodies 3 and 3 located above and below the intervertebral disc where the intervertebral disc is removed, as in the first embodiment. Next, while rotating the bone filling material 21, the cylindrical body 25 is fitted into the annular groove, and the bone filling material 21 is embedded over both vertebral bodies 3, 3. In this case, an internal thread may be formed in advance in the annular groove, or the cylindrical body 25 may be threaded while being fitted into the annular groove. Then, after the cylindrical body 25 is embedded, small holes having a smaller diameter than the screw hole 2701 are made in the vertebral body portion of the flange 27 that matches the screw hole 2701, and the screw 29 is embedded in the screw hole 2701 and the small hole. The small hole may be formed in advance when the annular groove is formed in the upper and lower vertebral bodies 3, 3.

【００１９】第２実施例によっても、前記第１実施例と
同様に、骨補填材２１が、切除した椎間板の上下の椎体
３，３にわたって埋め込み固定され、且つ、骨補填材２
１の円筒体２５の内部に、上下の椎体３，３の向かい合
う部分が残存するので、上下に位置する椎体３，３に作
用する圧縮引張方向及び圧縮引張方向と直交する方向の
力を骨補填材２１により受けることができる。また、骨
補填材２１の円筒体２５の内部に、上下の椎体３，３の
向かい合う部分が残存しているので、双方の残存部分の
骨組織が成長して骨融合がなされ、上下の椎体３，３を
安定して固定する上で有利となる。また、骨補填材２１
の円筒体２５に多数の孔２５０２を形成したので、孔２
５０２に骨が侵入して、円筒体２５の内部に残存した椎
体部分と円筒体２５の外側に位置する椎体部分との骨融
合がなされ、上下の椎体３，３を安定して固定する上で
有利となる。Also in the second embodiment, as in the first embodiment, the bone filling material 21 is embedded and fixed over the vertebral bodies 3, 3 above and below the excised intervertebral disc, and the bone filling material 2
Since the facing portions of the upper and lower vertebral bodies 3, 3 remain inside the cylindrical body 25 of No. 1, the compressive tension direction acting on the vertically located vertebral bodies 3, 3 and the force in the direction orthogonal to the compressive tension direction are applied. It can be received by the bone filling material 21. In addition, since the facing parts of the upper and lower vertebral bodies 3, 3 remain inside the cylindrical body 25 of the bone prosthesis 21, the bone tissue of both remaining parts grows, and bone fusion is performed. This is advantageous in stably fixing the bodies 3 and 3. In addition, the bone filling material 21
Since a large number of holes 2502 are formed in the cylindrical body 25 of
Bone invades 502, and bone fusion between the vertebral body portion remaining inside the cylindrical body 25 and the vertebral body portion located outside the cylindrical body 25 is performed, and the upper and lower vertebral bodies 3, 3 are stably fixed. It will be advantageous in doing so.

【００２０】次に、図１２乃至図１４を参照して第３実
施例について説明する。第３実施例に係る骨補填材３１
は第２実施例の変形例で、フランジの形状が前記第２実
施例と異なる。第３実施例に係る骨補填材３１は、第２
実施例と同様に、円筒体３５と、円筒体３５の端部に形
成されたフランジ３７とで構成され、円筒体３５には、
前記と同様に、ねじ３５０１、孔３５０２、テーパ面３
５０３が形成されている。前記フランジ３７は円筒体３
５の端部の両側において、円筒体３５の径外方に突出し
て形成され、各フランジ３７の先部寄り箇所に夫々二つ
のねじ孔３７０１が形成され、図１４に示すように、前
記フランジ３７の上面の両側から円筒体３５の上部にわ
たって円筒面３７０３が形成されている。図１３におい
て符合３７０１Ａは各ねじ孔３７０１の軸線を示し、前
記ねじ孔３７０１は、該ねじ孔３７０１に螺合され上下
の椎体３，３に結合されるねじ３９の先部が互いに離れ
るように傾斜して形成されている。上記構成からなる骨
補填材３１及びねじ３９は、チタン合金で形成されてお
り、燐酸カルシウムで被覆されていない。尚、本実施例
ではねじ３５０１、ねじ３９が固定手段に相当してい
る。このような第３実施例によっても前記第２実施例と
同様な効果が奏される。Next, a third embodiment will be described with reference to FIGS. Bone substitute material 31 according to the third embodiment
Is a modification of the second embodiment, and the shape of the flange is different from that of the second embodiment. The bone filling material 31 according to the third embodiment is the second one.
Similar to the embodiment, it is composed of a cylindrical body 35 and a flange 37 formed at the end of the cylindrical body 35.
As described above, the screw 3501, the hole 3502, the tapered surface 3
503 is formed. The flange 37 is a cylindrical body 3
5 are formed so as to project outward in the radial direction of the cylindrical body 35 on both sides of the end portion of 5, and two screw holes 3701 are formed in the flange 37 at positions near the front end thereof. As shown in FIG. A cylindrical surface 3703 is formed from both sides of the upper surface of the cylindrical body 35 to the upper part of the cylindrical body 35. In FIG. 13, reference numeral 3701A indicates the axis of each screw hole 3701, and the screw holes 3701 are screwed into the screw holes 3701 so that the tips of the screws 39 connected to the upper and lower vertebral bodies 3, 3 are separated from each other. It is formed to be inclined. The bone prosthesis material 31 and the screw 39 configured as described above are made of a titanium alloy and are not coated with calcium phosphate. In this embodiment, the screw 3501 and the screw 39 correspond to the fixing means. The third embodiment as described above also achieves the same effects as the second embodiment.

【００２１】次に、図１５乃至図１７を参照して第４実
施例について説明する。第４実施例に係る骨補填材４１
は、第３実施例の変形例で、第３実施例ではフランジを
二つ設けていたのに対して第３実施例ではフランジを一
つとしている。第４実施例に係る骨補填材４１は、円筒
体４５と、円筒体４５の端部に形成されたフランジ４７
とで構成され、円筒体４５には、前記と同様に、ねじ４
５０１、孔４５０２、テーパ面４５０３が形成され、フ
ランジ４７には軸線４７０１Ａを傾斜させてねじ孔４７
０１が形成され、このねじ孔４７０１に螺合するねじ４
９が椎体３に結合される。また、図１７に示すように、
前記フランジ４７の上面の両側から円筒体４５の上部に
わたって円筒面４７０３が形成され、更に、図１６に示
すように、フランジ４７が形成されない円筒体４５の端
部部分に欠部４５０９が形成されている。尚、本実施例
ではねじ４５０１、ねじ４９が固定手段に相当してい
る。このような第４実施例によっても前記第２実施例と
同様な効果が奏される。Next, a fourth embodiment will be described with reference to FIGS. Bone substitute material 41 according to the fourth embodiment
Is a modification of the third embodiment, and two flanges are provided in the third embodiment, whereas one flange is provided in the third embodiment. The bone filling material 41 according to the fourth embodiment includes a cylindrical body 45 and a flange 47 formed at an end of the cylindrical body 45.
The cylindrical body 45 is provided with a screw 4 as described above.
501, a hole 4502, and a tapered surface 4503 are formed, and the axis line 4701A is inclined on the flange 47 to form a screw hole 47.
01 is formed and screwed into the screw hole 4701.
9 is connected to the vertebral body 3. Also, as shown in FIG.
A cylindrical surface 4703 is formed from both sides of the upper surface of the flange 47 to the upper part of the cylindrical body 45. Further, as shown in FIG. 16, a cutout 4509 is formed in the end portion of the cylindrical body 45 where the flange 47 is not formed. There is. In this embodiment, the screw 4501 and the screw 49 correspond to the fixing means. The same effect as that of the second embodiment can be obtained by the fourth embodiment.

【００２２】[0022]

【発明の効果】以上の説明で明らかなように本発明に係
る骨補填材は、切除した椎間板の上下に位置する椎体に
わたって埋め込まれ、切除した椎間板の上下に位置する
椎体の向かい合う部分をその内部に位置させる中空状の
部材を備えるので、椎間板ヘルニア等の脊椎疾患におい
て、障害となった椎間板を切除した場合、この切除した
椎間板の上下に位置する椎体を、圧縮引張方向及び圧縮
引張方向と直交する方向の力に対して安定して固定する
ことが可能となる。As is apparent from the above description, the bone prosthesis material according to the present invention is embedded over the vertebral bodies located above and below the resected intervertebral disc, and the facing parts of the vertebral bodies located above and below the excised disc are removed. Since it has a hollow member located inside it, when the intervertebral disc that has become an obstacle is resected in spinal diseases such as disc herniation, the vertebral bodies located above and below the excised disc are compressed and stretched in the direction of compression and tension. It becomes possible to stably fix to the force in the direction orthogonal to the direction.

【図面の簡単な説明】[Brief description of drawings]

【図１】第１実施例に係る骨補填材の使用状態の断面側
面図である。FIG. 1 is a sectional side view of a bone filling material according to a first embodiment in a used state.

【図２】第１実施例に係る骨補填材の使用状態の正面図
である。FIG. 2 is a front view of a bone filling material according to the first embodiment in a used state.

【図３】第１実施例に係る骨補填材の側面図である。FIG. 3 is a side view of the bone substitute material according to the first embodiment.

【図４】第１実施例に係る骨補填材の断面側面図であ
る。FIG. 4 is a cross-sectional side view of the bone prosthetic material according to the first embodiment.

【図５】第１実施例に係る骨補填材の正面図である。FIG. 5 is a front view of the bone substitute material according to the first embodiment.

【図６】プレートの正面図である。FIG. 6 is a front view of a plate.

【図７】プレートの断面側面図である。FIG. 7 is a sectional side view of the plate.

【図８】プレートの変形例の断面側面図である。FIG. 8 is a sectional side view of a modification of the plate.

【図９】第２実施例に係る骨補填材の平面図である。FIG. 9 is a plan view of a bone substitute material according to a second embodiment.

【図１０】第２実施例に係る骨補填材の半部断面正面図
である。FIG. 10 is a front view of a half section of the bone prosthetic material according to the second embodiment.

【図１１】第２実施例に係る骨補填材の側面図である。FIG. 11 is a side view of the bone prosthetic material according to the second embodiment.

【図１２】第３実施例に係る骨補填材の平面図である。FIG. 12 is a plan view of a bone substitute material according to a third embodiment.

【図１３】第３実施例に係る骨補填材の半部断面正面図
である。FIG. 13 is a front view of a half section of the bone prosthetic material according to the third embodiment.

【図１４】第３実施例に係る骨補填材の側面図である。FIG. 14 is a side view of the bone prosthetic material according to the third embodiment.

【図１５】第４実施例に係る骨補填材の平面図である。FIG. 15 is a plan view of a bone substitute material according to a fourth embodiment.

【図１６】第４実施例に係る骨補填材の半部断面正面図
である。FIG. 16 is a half sectional front view of the bone prosthetic material according to the fourth embodiment.

【図１７】第４実施例に係る骨補填材の側面図である。FIG. 17 is a side view of the bone prosthetic material according to the fourth embodiment.

【符号の説明】[Explanation of symbols]

１ 脊髄 ３ 椎体 ５，２１，３１，４１ 骨補填材 ７，７１ プレート ９，２９，３９，４９ ねじ ３０７ 椎体の残存部分 1 Spinal cord 3 Vertebra 5,21,31,41 Bone substitute 7,71 Plate 9,29,39,49 Screw 307 Remaining part of vertebral body

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】 切除した椎間板の上下に位置する椎体に
わたって埋め込まれ、切除した椎間板の上下に位置する
椎体の向かい合う部分をその内部に位置させる中空状の
部材と、 前記中空状の部材を椎体に固定する固定手段と、 を備えることを特徴とする骨補填材。1. A hollow member, which is embedded over vertebral bodies located above and below a resected intervertebral disc, and in which the facing portions of the vertebral bodies located above and below the excised intervertebral disc are located, and the hollow member. A bone prosthesis material comprising: a fixing means for fixing to a vertebral body. 【請求項２】 前記中空状の部材は円筒状を呈し、前記
固定手段は、中空状の部材の外周に形成されたねじを含
んで構成されている請求項１記載の骨補填材。2. The bone filling material according to claim 1, wherein the hollow member has a cylindrical shape, and the fixing means includes a screw formed on the outer periphery of the hollow member. 【請求項３】 前記中空状の部材の端部にはフランジが
設けられ、前記固定手段は、前記フランジを挿通し椎体
に結合されるねじを含んで構成されている請求項１また
は２記載の骨補填材。3. A flange is provided at an end of the hollow member, and the fixing means includes a screw which is inserted through the flange and is connected to a vertebral body. Bone replacement material. 【請求項４】 前記フランジは前記中空状の部材と一体
に形成されている請求項３記載の骨補填材。4. The bone substitute material according to claim 3, wherein the flange is formed integrally with the hollow member. 【請求項５】 前記フランジは前記中空状の部材と別体
に形成されている請求項３記載の骨補填材。5. The bone substitute material according to claim 3, wherein the flange is formed separately from the hollow member. 【請求項６】 前記中空状の部材には、該中空状の部材
の内部と外部を連通する多数の孔が形成されている請求
項１，２，３，４または５記載の骨補填材。6. The bone substitute material according to claim 1, wherein the hollow member is provided with a large number of holes that communicate the inside and the outside of the hollow member.
JP5034510A 1992-01-28 1993-01-28 Bone filling-up material Pending JPH05269160A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3856692 1992-01-28
JP4-38566 1992-01-28

Publications (1)

Publication Number Publication Date
JPH05269160A true JPH05269160A (en) 1993-10-19

Family

ID=12528853

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5034510A Pending JPH05269160A (en) 1992-01-28 1993-01-28 Bone filling-up material

Country Status (2)

Country Link
JP (1) JPH05269160A (en)
DE (1) DE4302397C2 (en)

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