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JP2017508580A - Expandable interbody fusion device - Google Patents

Expandable interbody fusion device Download PDF

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JP2017508580A
JP2017508580A JP2016574320A JP2016574320A JP2017508580A JP 2017508580 A JP2017508580 A JP 2017508580A JP 2016574320 A JP2016574320 A JP 2016574320A JP 2016574320 A JP2016574320 A JP 2016574320A JP 2017508580 A JP2017508580 A JP 2017508580A
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inverted tooth
push rod
tooth frame
inverted
fusion
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JP6333418B2 (en
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維波 申
維波 申
雪城 路
雪城 路
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山東冠龍医療用品有限公司
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • 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 or setting implements
    • 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, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7061—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant for stabilising vertebrae or discs by improving the condition of their tissues, e.g. using implanted medication or fluid exchange
    • 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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    • 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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    • 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, e.g. stabilisers comprising fluid filler in an implant
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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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    • A61F2/00—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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    • A61F2/4455—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
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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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    • A61F2/00—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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    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305—Snap connection
    • 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
    • A61F2002/30904—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
    • 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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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Neurology (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Surgery (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Transplantation (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)

Abstract

本発明はベース部、インバーテッド歯部及びヘッド部で構成される融合体を利用し、前記融合体のベース部は融合体の軸線に沿ってプッシュロッドがあり、ネジ山によって融合体と連結され、融合体のインバーテッド歯部にΠ状のインバーテッド歯フレームが設けられ、前記インバーテッド歯フレームのインバーテッド歯フレームの最上面はプッシュロッドのプッシュロッドクランピングヘッドと連結される拡張型椎体間融合装置を提供する。【選択図】図１The present invention uses a fusion body composed of a base portion, an inverted tooth portion, and a head portion, and the base portion of the fusion body has a push rod along the axis of the fusion body and is connected to the fusion body by a screw thread. An inflatable vertebral body in which an inverted tooth frame is provided on the inverted tooth portion of the fusion body, and an uppermost surface of the inverted tooth frame of the inverted tooth frame is connected to a push rod clamping head of a push rod An interfusion device is provided. [Selection] Figure 1

Description

本発明は、医療手術機械分野に関し、より詳しくは胸腰椎後方手術に使用される拡張型椎体間融合装置に関する。   The present invention relates to the field of medical surgical machines, and more particularly to an expandable interbody fusion device for use in thoracolumbar posterior surgery.

椎体間融合装置は脊椎外科手術において広範囲に応用されるものであって、椎体間切除術で脊椎間の空間を再建するのに主に使用される。従来技術において、本願と最も近い技術方案は、中国国家知識財産権国特許局で権限を与えた出願番号２０１１２０３５０２８５．３であり、その名称は拡張型椎体間融合装置の実用新案特許である。上記発明の技術方案では骨移植窓が不足して手術中に骨粒子を注入して骨移植を行ない難く、これに因り手術後に融合装置を椎体と融合させることが容易でないことから体内の異物になるおそれがあるので、手術リスクがあると言える。これは従来技術に存在する欠点でもある。   The interbody fusion device is widely applied in spinal surgery and is mainly used to reconstruct the intervertebral space in interbody excision. In the prior art, the closest technical scheme to the present application is the application number 2012120350285.3 granted by the Chinese National Intellectual Property Rights National Patent Office, and its name is a utility model patent of the expandable interbody fusion device. In the technical solution of the above invention, it is difficult to perform bone grafting by injecting bone particles during surgery due to lack of a bone grafting window, which makes it difficult to fuse the fusion device with the vertebral body after surgery. It can be said that there is a risk of surgery. This is also a drawback existing in the prior art.

中国実用新案特許出願番号２０１１２０３５０２８５．３Chinese utility model patent application number 2011020350285.3

本発明は、拡張型椎体間融合装置という技術方案を提案することによって従来技術に存在する欠点を補う。また、本発明はベース部、インバーテッド歯部及びヘッド部で構成される融合体を利用し、前記融合体のベース部は融合体の軸線に沿ってプッシュロッドがあり、ネジ山によって融合体と連結され、融合体のインバーテッド歯部にΠ状のインバーテッド歯フレームが設けられ、前記インバーテッド歯フレームのインバーテッド歯フレームの最上面はプッシュロッドのプッシュロッドクランピングヘッドと連結される。前記構造は、手術で融合装置を椎体間内に設けるにおいて、プッシュロッドが回転進入する時にインバーテッド歯フレームを下に移動させ、インバーテッド歯フレームの両側壁が融合体のヘッド部両側に向けて開放され、椎体間の高さを調節することができ、プッシュロッド軸孔、クランピングヘッドスルー溝（ｔｈｒｏｕｇｈ ｇｒｏｏｖｅ）及びインバーテッド歯孔から骨移植通路を形成して骨粒子を注入するので、手術後に融合装置が椎体と共に融合されるように保障する。   The present invention compensates for the disadvantages present in the prior art by proposing a technical scheme called an expandable interbody fusion device. Further, the present invention uses a fusion body composed of a base portion, an inverted tooth portion, and a head portion, and the base portion of the fusion body has a push rod along the axis of the fusion body, The inverted tooth frame of the fused body is connected to the inverted tooth frame, and the uppermost surface of the inverted tooth frame of the inverted tooth frame is connected to the push rod clamping head of the push rod. In the above-described structure, when the fusion device is surgically provided between the vertebral bodies, the inverted tooth frame is moved downward when the push rod rotates and the both side walls of the inverted tooth frame are directed toward both sides of the head portion of the fusion body. And the height between the vertebral bodies can be adjusted, and bone particles are injected from the push rod shaft hole, clamping head through groove and inverted tooth hole to form a bone graft passage. Ensure that the fusion device is fused with the vertebral body after surgery.

本発明は、次のような技術方案を介して実現することができる。本発明の拡張型椎体間融合装置は、融合体と前記融合体内で前記融合体と軸方向にネジ山によって連結されるプッシュロッドを有し、前記融合体の垂直投影が面取りを（ｃｈａｍｆｅｒ）を持つ長方形であり、前記融合体の上部はベース部であり、下部はヘッド部であり、前記ベース部とヘッド部との間はインバーテッド歯部の一体型構造であり、前記ベース部の内部には軸線に沿ってネジ孔があり、前記プッシュロッドは前記ネジ孔内に有りながらネジ山と連結され、前記インバーテッド歯部は前記ベース部と連結される左右２つのインバーテッド歯部側壁で構成され、前記２つのインバーテッド歯部側壁間は中空であり、前記インバーテッド歯部にはΠ状のインバーテッド歯フレームが連結され、前記２つのインバーテッド歯部側壁の最上部とベース部の連結地点の両側にはインバーテッド歯フレームスライディング溝があり、前記２つのインバーテッド歯部側壁底部と融合体のヘッド部連結地点の両側には側壁階段状の溝があり、前記融合体のヘッド底面はアーチ（ａｒｃｈ）型であり、前記インバーテッド歯フレームの最上面には前記融合体と同軸であるクランピングヘッド孔があり、前記インバーテッド歯フレームの両側壁外側にはインバーテッド歯があり、前記インバーテッド歯フレームの両側壁には対応するインバーテッド歯フレーム孔があり、前記インバーテッド歯フレームの両側壁の底段には前記インバーテッド歯部側壁の側壁階段状の溝とマッチングされるインバーテッド歯フレームヘッドがあり、前記プッシュロッド下部にはプッシュロッドクランピングヘッドがあり、前記インバーテッド歯フレームのクランピングヘッド孔は前記プッシュロッドクランピングヘッドを覆いながら設けられ、前記プッシュロッドクランピングヘッドの軸線地点にはクランピングヘッドスルー溝があり、前記プッシュロッド最上段には前記プッシュロッドの軸線に沿ってプッシュロッド軸孔が前記クランピングヘッドスルー溝と連結されている。本発明の具体的な特徴において、前記融合体のベース部最上面にベース部スルー溝がさらにある。前記プッシュロッドの最上面は軸線に沿って内部六角形孔がさらにあり、前記内部六角形孔の軸線は前記プッシュロッド軸孔の軸線とさらに逢う。前記インバーテッド歯フレームのインバーテッド歯フレーム孔は長方形である。前記融合体に使用する材料は医療用チタニウム合金又は医療用非金属材料である。前記プッシュロッドに使用する材料は医療用チタニウム合金又は医療用非金属材料である。前記インバーテッド歯フレームに使用する材料は医療用チタニウム合金又は医療用非金属材料である。   The present invention can be realized through the following technical solution. The expandable interbody fusion device of the present invention has a fusion rod and a push rod that is axially connected to the fusion body by a screw thread in the fusion body, and the vertical projection of the fusion body chamfers. The fusion unit has a base portion at the top, a head portion at the bottom, and an integrated structure of inverted tooth portions between the base portion and the head portion. Has a screw hole along the axis, and the push rod is connected to the screw thread while being in the screw hole, and the inverted tooth portion is a left and right inverted tooth side wall connected to the base portion. And a space between the two inverted tooth side walls is hollow, and a hook-shaped inverted tooth frame is connected to the inverted tooth parts, and the outermost side walls of the two inverted tooth side walls are connected. There are inverted tooth frame sliding grooves on both sides of the connection point between the base part and the base part, and there are side wall step-like grooves on both sides of the bottom part of the two inverted tooth side walls and the head part connection point of the fusion body, The bottom surface of the fusion head is an arch type, the top surface of the inverted tooth frame has a clamping head hole that is coaxial with the fusion body, There are corresponding inverted tooth frame holes on both side walls of the inverted tooth frame, and a stepped groove on the side wall of the inverted tooth side wall at the bottom of the both side walls of the inverted tooth frame. There is an inverted tooth frame head matched with the push rod clamping head at the bottom of the push rod. A clamping head hole of the inverted tooth frame is provided so as to cover the push rod clamping head, and there is a clamping head through groove at an axial point of the push rod clamping head. On the upper stage, a push rod shaft hole is connected to the clamping head through groove along the axis of the push rod. In a specific feature of the present invention, a base portion through groove is further provided on the uppermost surface of the base portion of the fusion body. The top surface of the push rod further includes an internal hexagonal hole along the axis, and the axis of the internal hexagonal hole further meets the axis of the push rod shaft hole. The inverted tooth frame hole of the inverted tooth frame is rectangular. The material used for the fusion is a medical titanium alloy or a medical non-metallic material. The material used for the push rod is a medical titanium alloy or a medical non-metallic material. The material used for the inverted tooth frame is a medical titanium alloy or a medical non-metallic material.

上述したように、本発明は融合体の垂直投影が面取りを持つ長方形であり、前記融合体の上部はベース部、下部はヘッド部であり、ベース部とヘッド部との間はインターテッド歯部の一体型構造である。前記ベース部の内部は軸線に沿ってネジ孔があり、前記プッシュロッドは前記ネジ孔内にあり互いにマッチングされてネジ山によって連結され、前記インバーテッド歯部はベース部と連結される左右２つのインバーテッド歯部側壁で構成され、２つのインバーテッド歯部側壁間は中空であり、前記インバーテッド歯部にはΠ状のインバーテッド歯フレームが連結され、前記２つのインバーテッド歯部側壁の最上部とベース部の連結地点の両側にはインバーテッド歯フレームスライディング溝があり、二つのインバーテッド歯部側壁底部と融合体のヘッド部連結地点の両側には側壁階段状の溝があり、前記融合体のヘッド部底面はアーチ型である。前記インバーテッド歯フレームの最上面には融合体と同軸であるクランピングヘッド孔があり、インバーテッド歯フレームの両側壁外側にはインバーテッド歯があり、インバーテッド歯フレームの両側壁には対応にはインバーテッド歯フレーム孔があり、インバーテッド歯フレームの両側壁の底段にはインバーテッド歯部側壁の側壁階段状の溝とマッチングされるインバーテッド歯フレームヘッドがある。前記プッシュロッド下部にはプッシュロッドクランピングヘッドがあり、前記インバーテッド歯フレームのクランピングヘッド孔は前記プッシュロッドクランピングヘッドを覆いながら設けられ、前記プッシュロッドクランピングヘッドの軸線地点にはクランピングヘッドスルー溝があり、前記プッシュロッド最上段はプッシュロッドの軸線に沿ってプッシュロッド軸孔がクランピングヘッドスルー溝と連結されている。前記構造は融合体が長方形でありアーチ型でインバーテッド歯フレームの２つのインバーテッド歯フレーム側壁にインバーテッド歯があるので、融合体を患者の脊椎の椎体間内に挿入し易く、インバーテッド歯フレーム側壁のインバーテッド歯は融合体が容易に退出されないように保障することができる。内部六角形孔を介してプッシュロッドを回転させ、プッシュロッドはインバーテッド歯フレームを下に移動させてインバーテッド歯フレームの２つのインバーテッド歯フレーム両側が開放され、患者の脊椎の椎体間の高さを調節することによって、椎体間の高さと脊椎の生理的弧度基準を満たすことができる。また、プッシュロッドのプッシュロッド軸孔、クランピングヘッドスルー溝及びインバーテッド歯フレーム孔を介して骨移植通路と窓口を構成して椎体間骨粒子を注入し、融合体と椎体を固定融合することによって患者の脊椎が正常な機能を回復することができる。ここで分かるように、本発明は従来技術と比べる時、特段な実質的特徴と顕著な進歩性があるので、その実施による有益な効果もまた著しい。   As described above, the present invention is a rectangle in which the vertical projection of the fusion body is chamfered, the upper portion of the fusion body is the base portion, the lower portion is the head portion, and the interposed tooth portion is between the base portion and the head portion. This is an integrated structure. The inside of the base part has a screw hole along an axis, the push rod is in the screw hole and matched with each other and connected by a screw thread, and the inverted tooth part is connected to the base part by two An inverted tooth side wall is formed, and a space between the two inverted tooth side walls is hollow. A flanged inverted tooth frame is connected to the inverted tooth side, and the outermost side wall of the two inverted tooth side walls is connected. There are inverted tooth frame sliding grooves on both sides of the upper and base connection points, and two inverted tooth side wall bottoms and side wall stepped grooves on both sides of the fusion head head connection point, said fusion The bottom surface of the head of the body is arched. The top surface of the inverted tooth frame has a clamping head hole that is coaxial with the fusion body, the inverted tooth frame has inverted teeth on the outer side walls, and the inverted tooth frame has both side walls. Has an inverted tooth frame hole, and an inverted tooth frame head matched with a stepped groove on the side wall of the inverted tooth portion at the bottom of both side walls of the inverted tooth frame. A push rod clamping head is provided at a lower portion of the push rod, and a clamping head hole of the inverted tooth frame is provided so as to cover the push rod clamping head, and is clamped at an axial point of the push rod clamping head. There is a head through groove, and the push rod shaft hole is connected to the clamping head through groove at the uppermost stage of the push rod along the axis of the push rod. The structure is rectangular, fused and arched and has inverted teeth on the side walls of the two inverted tooth frames of the inverted tooth frame so that the fusion can be easily inserted between the vertebral bodies of the patient's spine. Inverted teeth on the tooth frame sidewall can ensure that the fusion is not easily withdrawn. Rotating the push rod through the internal hexagonal hole, the push rod moves the inverted tooth frame down to open both sides of the two inverted tooth frames of the inverted tooth frame, and between the vertebral bodies of the patient's spine By adjusting the height, the intervertebral body height and vertebral physiological arcuity criteria can be met. In addition, the interbody bone particles are injected through the push rod shaft hole of the push rod, the clamping head through groove and the inverted tooth frame hole to form the bone graft passage and window, and the fusion body and the vertebral body are fixed and fused. By doing so, the patient's spine can be restored to normal function. As can be seen, since the present invention has particular substantial features and significant inventive step when compared with the prior art, the beneficial effects of its implementation are also significant.

本発明において具体的な実施方式の部分的な断面図である。FIG. 4 is a partial cross-sectional view of a specific implementation method in the present invention. 図１を左から示した断面図である。It is sectional drawing which showed FIG. 1 from the left. 図２の鳥瞰図である。FIG. 3 is a bird's eye view of FIG. 2. 図２においてＡ−Ａ地点の断面図である。It is sectional drawing of the AA point in FIG.

以下、本発明の例示的な実施形態について図面を参照して詳細に説明する。   Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings.

図面で示すように、本発明の拡張型椎体融合装置は、融合体５と融合体５内で融合体５と軸方向にねじ山によって連結されるプッシュロッド７を有し、前記融合体５の垂直投影は面取りを持つ長方形であり、前記融合体５の上部はベース部４、下部はヘッド部１であり、ベース部４とヘッド部１との間はにインバーテッド歯部１の一体型構造である。前記ベース部４の内部は軸線に沿ってネジ孔があり、前記プッシュロッド７は前記ネジ孔内にありながら互いにマッチングされてネジ山と連結され、前記融合体５のベース部４の最上面にベース部スルー溝６がさらにあり、前記ベース部スルー溝６は融合装置を設ける手術において融合装置をクランピングする手術機械と融合装置とを連結することに使用される。前記インバーテッド歯部３はベース部４と連結される左右２つのインバーテッド歯部側壁１７で構成され、２つのインバーテッド歯部側壁１７間は中空であり、前記インバーテッド歯部３にはΠ状のインバーテッド歯フレーム２が連結され、前記２つのインバーテッド歯部側壁１７の最上部とベース部４の連結地点の両側にはインバーテッド歯フレームスライディング溝１６があり、二つのインバーテッド歯部側壁１７底部と融合体５のヘッド部１の連結地点の両側には側壁階段状溝１８があり、前記融合体５のヘッド部１の底面はアーチ型である。前記インバーテッド歯フレーム最上面１５には融合体５と同軸であるクランピングヘッド孔１９があり、インバーテッド歯フレーム２の両側壁外側にはインバーテッド歯９があり、インバーテッド歯フレーム２の両側壁には対応するインバーテッド歯フレーム孔１０があり、前記インバーテッド歯フレーム孔１０はアーチ型で、インバーテッド歯フレーム２両側壁の底段にはインバーテッド歯部側壁１７の側壁階段状の溝１８とマッチングされるインバーテッド歯フレームヘッド１１がある。前記プッシュロッド７の下部にはプッシュロッドクランピングヘッド８があり、前記インバーテッド歯フレーム２のクランピングヘッド孔１９は前記プッシュロッドクランピングヘッド８を覆いながら設けられ、前記プッシュロッドクランピングヘッド８の軸線地点にはクランピングヘッドスルー溝１２があり、前記クランピングヘッドスルー溝１２はプッシュロッドクランピングヘッド８の弾性を増加させる役割を果たし、前記プッシュロッド７の最上段はプッシュロッド７の軸線に沿ってプッシュロッド軸孔１３がクランピングヘッドスルー溝１２と連結される。前記プッシュロッド７の最上面は軸線に沿って内部六角形孔１４がさらにあり、前記内部六角形孔１４の軸線はプッシュロッド軸孔１３の軸線とさらに逢い、内部六角形孔１４は手術中に六角レンチを利用してプッシュロッド７を回転させてインバーテッド歯フレーム２を下に移動させることによってインバーテッド歯フレーム２の両側が開放されるようにする。前記融合体５、プッシュロッド７及びインバーテッド歯フレーム２に使用する材料は医療用チタニウム合金又は医療用非金属材料のうちいずれか一つであり、同一な材料を使用することもでき、さらには他の材料を使用することもできる。本発明の具体的な実施形態では融合体５とプッシュロッド７とも医療用チタニウム合金材料を使用し、インバーテッド歯フレーム２には医療用非金属材料を使用した。   As shown in the drawings, the expandable vertebral body fusion device of the present invention has a fusion rod 5 and a push rod 7 that is axially connected to the fusion body 5 by a screw thread in the fusion body 5. The vertical projection is a rectangle with chamfering, the upper part of the fusion body 5 is a base part 4, the lower part is a head part 1, and an inverted tooth part 1 is integrated between the base part 4 and the head part 1. Structure. The inside of the base part 4 has a screw hole along the axis, and the push rods 7 are matched with each other while being in the screw hole and connected to the screw thread, and are formed on the uppermost surface of the base part 4 of the fusion body 5. There is also a base through groove 6, which is used to connect the fusion machine with a surgical machine that clamps the fusion device in the operation of providing the fusion device. The inverted tooth portion 3 is composed of two left and right inverted tooth side walls 17 connected to the base portion 4, and the space between the two inverted tooth side walls 17 is hollow. Inverted tooth frame 2 is connected, and an inverted tooth frame sliding groove 16 is provided on both sides of the uppermost part of the two inverted tooth side walls 17 and the connection point of the base part 4, and two inverted tooth parts are provided. Side wall step-like grooves 18 are formed on both sides of the connection point between the bottom of the side wall 17 and the head portion 1 of the fusion body 5, and the bottom surface of the head portion 1 of the fusion body 5 is arched. The top surface 15 of the inverted tooth frame 15 has a clamping head hole 19 that is coaxial with the fusion body 5, and the inverted tooth frame 2 has inverted teeth 9 on the outer side of both side walls, and both sides of the inverted tooth frame 2. There is a corresponding inverted tooth frame hole 10 on the wall. The inverted tooth frame hole 10 is arch-shaped, and the bottom step of the both side walls of the inverted tooth frame 2 has a stepped groove on the side wall of the inverted tooth side wall 17. There is an inverted tooth frame head 11 matched to 18. A push rod clamping head 8 is provided below the push rod 7, and a clamping head hole 19 of the inverted tooth frame 2 is provided so as to cover the push rod clamping head 8. There is a clamping head through groove 12 at the axial point, and the clamping head through groove 12 serves to increase the elasticity of the push rod clamping head 8. The uppermost stage of the push rod 7 is the axis of the push rod 7. The push rod shaft hole 13 is connected to the clamping head through groove 12 along the line. The top surface of the push rod 7 further has an internal hexagonal hole 14 along the axis, and the axis of the internal hexagonal hole 14 is further tangled with the axis of the push rod shaft hole 13, and the internal hexagonal hole 14 is in operation. By rotating the push rod 7 using a hexagon wrench to move the inverted tooth frame 2 downward, both sides of the inverted tooth frame 2 are opened. The material used for the fusion body 5, the push rod 7 and the inverted tooth frame 2 is any one of a titanium alloy for medical use or a non-medical medical material, and the same material can be used. Other materials can also be used. In a specific embodiment of the present invention, both the fusion body 5 and the push rod 7 are made of a medical titanium alloy material, and the inverted tooth frame 2 is made of a medical non-metallic material.

本発明は、上記の具体的な実施形態に限定されず、本発明の属する技術分野の当業者は本発明の実施範囲内で変更、改善、追加または置換を行なうことができ、これは全て本発明の保護範囲に属する。   The present invention is not limited to the specific embodiments described above, and those skilled in the art to which the present invention pertains can make changes, improvements, additions or substitutions within the scope of the present invention, all of which It belongs to the protection scope of the invention.

１ ヘッド部
２ インバーテッド歯フレーム
３ インバーテッド歯部
４ ベース部
５ 融合体
６ ベース部スルー溝
７ プッシュロッド
８ プッシュロッドクランピングヘッド
９ インバーテッド歯
１０ インバーテッド歯フレーム孔
１１ インバーテッド歯フレームヘッド
１２ クランピングヘッドスルー溝
１３ プッシュロッド軸孔
１４ 内部六角形孔
１５ インバーテッド歯フレーム最上面
１６ インバーテッド歯フレームスライディング溝
１７ インバーテッド歯部側壁
１８ 側壁階段状の溝
１９ クランピングヘッド孔

DESCRIPTION OF SYMBOLS 1 Head part 2 Inverted tooth frame 3 Inverted tooth part 4 Base part 5 Fusion body 6 Base part through groove 7 Push rod 8 Push rod clamping head 9 Inverted tooth 10 Inverted tooth frame hole 11 Inverted tooth frame head 12 Clamping head through groove 13 Push rod shaft hole 14 Internal hexagon hole 15 Inverted tooth frame top surface 16 Inverted tooth frame sliding groove 17 Inverted tooth side wall 18 Side wall stepped groove 19 Clamping head hole

Claims (7)

拡張型椎体間融合装置において、
融合体と前記融合体内で前記融合体と軸方向にネジ山によって連結されるプッシュロッドを有し、前記融合体の垂直投影が面取り（ｃｈａｍｆｅｒ）を持つ長方形であり、前記融合体の上部はベース部、下部はヘッド部であり、前記ベース部とヘッド部との間はインバーテッド歯部の一体型構造であり、前記ベース部の内部には軸線に沿ってネジ孔があり、前記プッシュロッドは前記ネジ孔内に有りながらネジ山と連結され、前記インバーテッド歯部は前記ベース部と連結される左右２つのインバーテッド歯部側壁で構成され、前記２つのインバーテッド歯部側壁間は中空であり、前記インバーテッド歯部にはΠ状のインバーテッド歯フレームが連結され、前記２つのインバーテッド歯部側壁の最上部とベース部の連結地点の両側にはインバーテッド歯フレームスライディング溝があり、前記２つのインバーテッド歯部側壁底部と融合体のヘッド部の連結地点の両側には側壁階段状の溝があり、前記融合体のヘッド部底面はアーチ（ａｒｃｈ）型であり、前記インバーテッド歯フレームの最上面には前記融合体と同軸であるクランピングヘッド孔があり、前記インバーテッド歯フレームの両側壁外側にはインバーテッド歯があり、前記インバーテッド歯フレームの両側壁には対応するインバーテッド歯フレーム孔があり、前記インバーテッド歯フレームの両側壁の底段には前記インバーテッド歯部側壁の側壁階段状の溝とマッチングされるインバーテッド歯フレームヘッドがあり、前記プッシュロッド下部にはプッシュロッドクランピングヘッドがあり、前記インバーテッド歯フレームのクランピングヘッド孔は前記プッシュロッドクランピングヘッドを覆いながら設けられ、前記プッシュロッドクランピングヘッドの軸線地点にはクランピングヘッドスルー溝があり、前記プッシュロッド最上段には前記プッシュロッドの軸線に沿ってプッシュロッド軸孔が前記クランピングヘッドスルー溝と連結されていることを特徴とする拡張型椎体間融合装置。 In the expandable interbody fusion device,
A fusion rod having a push rod axially connected to the fusion body by a screw thread in the fusion body, wherein the vertical projection of the fusion body is a rectangle with a chamfer, the top of the fusion body being a base The lower part is a head part, and the base part and the head part have an integrated structure of inverted tooth parts, the base part has a screw hole along the axis, and the push rod is The inverted tooth part is composed of two left and right inverted tooth side walls connected to the base part, and the space between the two inverted tooth side walls is hollow. And a flange-like inverted tooth frame is connected to the inverted tooth part, and an inverted part is provided on both sides of the uppermost part of the two inverted tooth part side walls and the base part. There is a Ted tooth frame sliding groove, and there are side wall stepped grooves on both sides of the connection point between the two inverted tooth side wall bottoms and the head part of the fusion body, and the bottom surface of the head part of the fusion body is an arch. The inverted tooth frame has a clamping head hole that is coaxial with the fusion body, the inverted tooth frame has inverted teeth on the outer side walls, and the inverted tooth frame. There are corresponding inverted tooth frame holes on both side walls of the inverted tooth frame, and an inverted tooth frame head matched with a stepped groove on the side wall of the inverted tooth side wall is provided at the bottom of both side walls of the inverted tooth frame. There is a push rod clamping head below the push rod, and the inverted tooth frame A clamping head hole is provided so as to cover the push rod clamping head, and there is a clamping head through groove at an axial point of the push rod clamping head, and an axis of the push rod at the uppermost stage of the push rod. An expandable interbody fusion device, wherein a push rod shaft hole is connected to the clamping head through groove along the axis. 前記融合体のベース部の最上面にベース部スルー溝がさらにあることを特徴とする請求項１に記載の拡張型椎体間融合装置。   The expandable interbody fusion device according to claim 1, further comprising a base portion through groove on an uppermost surface of the base portion of the fusion body. 前記プッシュロッドの最上面は軸線に沿って内部六角形孔がさらにあり、前記内部六角形孔の軸線は前記プッシュロッド軸孔の軸線とさらに逢うことを特徴とする請求項１に記載の拡張型椎体間融合装置。   2. The expansion type according to claim 1, wherein the top surface of the push rod further includes an internal hexagonal hole along an axis, and the axis of the internal hexagonal hole further meets the axis of the push rod shaft hole. Interbody fusion device. 前記インバーテッド歯フレームのインバーテッド歯フレーム孔は長方形であることを特徴とする請求項１に記載の拡張型椎体間融合装置。   The expandable interbody fusion device according to claim 1, wherein the inverted tooth frame hole of the inverted tooth frame is rectangular. 前記融合体に使用する材料は医療用チタニウム合金又は医療用非金属材料であることを特徴とする請求項１または２に記載の拡張型椎体間融合装置。   3. The expandable interbody fusion device according to claim 1, wherein the material used for the fusion body is a medical titanium alloy or a medical non-metallic material. 前記プッシュロッドに使用する材料は医療用チタニウム合金又は医療用非金属材料であることを特徴とする請求項１または３に記載の拡張型椎体間融合装置。   4. The expandable interbody fusion device according to claim 1, wherein a material used for the push rod is a medical titanium alloy or a medical non-metallic material. 前記インバーテッド歯フレームに使用する材料は医療用チタニウム合金又は医療用非金属材料であることを特徴とする請求項１または４に記載の拡張型椎体間融合装置。

5. The expandable interbody fusion device according to claim 1, wherein a material used for the inverted tooth frame is a medical titanium alloy or a medical non-metallic material.

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