JP3704018B2 - Interbody repair device - Google Patents

Interbody repair device Download PDF

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Publication number
JP3704018B2
JP3704018B2 JP2000092382A JP2000092382A JP3704018B2 JP 3704018 B2 JP3704018 B2 JP 3704018B2 JP 2000092382 A JP2000092382 A JP 2000092382A JP 2000092382 A JP2000092382 A JP 2000092382A JP 3704018 B2 JP3704018 B2 JP 3704018B2
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contact surface
repair device
elastic guide
lower contact
interbody
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JP2001037793A (en
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智一 林
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智一 林
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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
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • 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
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2002/448—Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants

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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)
  • General Health & Medical Sciences (AREA)
  • Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Cardiology (AREA)
  • Vascular Medicine (AREA)
  • Transplantation (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Surgical Instruments (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、椎体間修復器に関し、特に、受ける力の種々の状態により、やや変形し得る椎体間修復器に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
従来の椎体間修復器は、外周に孔が形成された中空の円柱体であって、その内部に砕骨を加えて構成されている。このようなものの典型な例としては、米国特許第４，５０１，２６９号および第５，０１５，２４７号により改良した米国ＳＰＩＮＴＥＣＨ社製の、ＢＡＫＴＭ椎体間融合システム（The BAKTM Interbody Fusion System ）が挙げられる。
【０００３】
該システムは、殆ど剛体の中空円柱体であって、内部に砕骨を加えて構成されているため、人体に植入した後、脊椎関節間の空間とより合致するように、脊椎関節の相対する位置で微妙に調整することができない。
【０００４】
本発明者は、このような欠点に就き、新たに調合性を有する椎体間修復器を設計したが（米国特許第５，４２３，８１７号参照）、該発明には尚多くの欠点があった。例えば、円柱形バネを植入するようにした場合には、切り口が大きくなる、手術の時間が長くなる、術後の癒合が遅い等の欠点があった。
【０００５】
そこで、上記した従来公知の椎体間修復器の欠点に就き、本発明者は新たに本発明の椎体間修復器を設計したものであり、本発明の椎体間修復器は弾性案内溝を有するので自動調節の微動機能があり、また、左右両側面の間の距離は上下接触面の間の距離より小さく、手術に有利である。また、上下接触面の突起物は、本発明の椎体間修復器と脊椎関節の固定に有利である。
【０００６】
したがって、本発明の目的は、改良された椎体間修復器を提供することである。また、本発明の他の目的は、弾性案内溝を有する椎体間修復器を提供することである。また、本発明の他の目的は、上下接触面は実質上、長い凸状円弧面を呈し、左右両側面は実質上、互いに略平行である椎体間修復器を提供することである。
【０００７】
【課題を解決するための手段】
本発明においては、所謂、上、下、前、後、左、右、の語は、いずれも人が直立した時の上、下、前、後、左、右を指すものとして使用する。
【０００８】
本発明の椎体間修復器は、脊椎関節に接触させられる上方接触面および下方接触面と、該上方および下方接触面に連なる左右の両側面とを有する、弾性ブロックであり、その特徴としては、前記上方接触面には、表面から下方に向けて前記下方接触面に達しない深さまで伸延するとともに前記左右の両側面に開口する、相互に略平行な複数の下行弾性案内溝が形成され、前記下方接触面には、表面から上方に向けて前記上方接触面に達しない深さまで伸延するとともに前記左右の両側面に開口する、前記下行弾性案内溝と略平行な一つ又は複数の上行弾性案内溝が形成され、前記上行弾性案内溝と下行弾性案内溝とは、一つ又は複数の群の案内溝ごとに交互の順に配列され、前記左側面と前記右側面とは平面を呈し、前記上方接触面と前記下方接触面とは、前後が小さく中間が膨出した凸面を呈している。
【０００９】
上記弾性ブロックの材料としては、整形外科手術に適用する任意の生物的適合性材料、例えば、ステンレス（ＳＵＳ３１６ＬＶＭ等）、チタン合金（Ｔｉ−６−４等）、コバルト−モリブデン−ニッケル合金等が挙げられる。
【００１０】
上記弾性ブロックの左側面と右側面は、実質上、略平面であることが好ましく、また、両者が実質上、互いに平行であると更に好ましい。
【００１１】
上記弾性ブロックの上方接触面と下方接触面とは、実質上、前後が小さく、中間が膨出した凸面、好ましくは凸状円弧面を呈しており、該凸面にはいずれも複数の突起物が形成されていることが好ましい。該突起物は、不規則な突起物でも、規則性のある突起物、例えば列状突起物又は歯状突起物でもよい。
【００１２】
上記の上方接触触面には、一つ又は複数の下行（即ち、上方接触面から下方接触面への方向）の弾性案内溝があり、好ましくは複数の弾性案内溝、特に２〜５個の弾性案内溝を形成することが好ましい。
【００１３】
上記の下方接触触面には、一つ又は複数の上行（即ち、下方接触面から上方接触面への方向）の弾性案内溝があり、好ましくは複数の弾性案内溝、特に２〜５個の弾性案内溝を形成することが好ましい。
【００１４】
上記の上行弾性案内溝と下行弾性案内溝とは、実質上、互いに略平行であることが好ましく、また、上行弾性案内溝と下行弾性案内溝とが共に複数ある場合、上行弾性案内溝を「上」、下行弾性案内溝を「下」としたとき、上行弾性案内溝と下行弾性案内溝とは、例えば「下上下上下上下上」、「下下上下上上」、「下上上下下上」等の交互の順に配列するのが好ましい。
【００１５】
【発明の実施の形態】
以下、本発明の特徴、目的および効果を了解するために、図面を参照して、本発明の最も好ましい実施形態について説明する。なお、前述したように、本発明においては、上、下、前、後、左、右、の語は、いずれも人が直立した時の上、下、前、後、左、右を指すものとして使用する。
【００１６】
図１は、本発明の好ましい実施形態の斜視図である。図１において、符号１００は、椎体間修復器としての弾性ブロックを示しており、弾性ブロック１００は、上方接触面１２０と下方接触面１３０とを有している。上方接触面１２０には、表面から下方に向けて所定深さに伸延する下行弾性案内溝１１０が形成されており、下方接触面１３０には、表面から上方に向けて所定深さに伸延する上行弾性案内溝１１１が形成されている。図示のように、上行弾性案内溝１１１は二つ、下行弾性案内溝１１０は三つあり、交互の順（即ち下行、上行、下行、上行、下行の順）に配列されている。
【００１７】
また、弾性ブロック１００の上方接触面１２０上には、歯状の突起物１２１が形成されており、下方接触面１３０上には、歯状の突起物１３１が形成されている。弾性ブロック１００はさらに、後面１４０と側面１６０とを有しており、後面１４０上には、ジグ孔１４１、ジグ溝１４２，１４３が形成されている。
【００１８】
図２は、図１に示す椎体間修復器の側面を示す図である。図２において、符号１００、１１０、１１１、１２１、１３１、１４１の定義は図１と同じである。符号１２０および１３０は、それぞれ弾性ブロック１００の上方接触面と下方接触面とを示しており、図中のジグ孔１４１には、ネジ山を破線で示してある。
【００１９】
図３は、図１に示す椎体間修復器の上方接触面を示す図である。図３において、符号１１０、１２０、１２１の定義は図２と同じである。
【００２０】
図４は、図１に示す椎体間修復器の後面を示す図である。図４において、符号１２０、１３０、１４１、１４２、１４３の定義は図１〜３と同じである。符号１４１は、弾性ブロック１００のジグ孔である。その後面には、白色部分で図示するように、歯状の突起物１２１，１３１が見られる、黒色部分で図示する歯状の突起物は、上下接触面１２０，１３０の実質上前後が小さく中間が大きい凸弧面に形成された各突起物を示している。
【００２１】
図５および図６は、弾性ブロックを使用した手術を説明するための斜視図である。図５に示すように、まず、支えジグ２００で二つの脊椎関節４００と４５０を開き、ジグ３００の先端に装着された椎体間修復器としての弾性ブロック１００を、右側面を上に向けて、脊椎関節４００と４５０との間に植入する。次いで、図６に示すように、図５中の弾性ブロック１００を図６に示す方向に回転させて、弾性ブロック１００の上方接触面１２０と下方接触面１３０とを、それぞれ脊椎関節４００と４５０とに接触させる。
【００２２】
図７は、弾性ブロックを１箇所に２個使用した場合を示す斜視図である。図７に示すように、図５および図６に示した方法により別の弾性ブロック１００′を植入している。なお、図５〜図７中の弾性ブロック１００、１００′に形成されている突起物は、列状のものである。
【００２３】
このように本実施形態によれば、脊椎関節４００と４５０との間に配置される二つの椎体間修復器としての弾性ブロック１００、１００′には、いずれも弾性案内溝が形成されているので、二つの弾性ブロックは弾性案内溝によって付与される弾性によりその形状を自動的に微調整し、その結果、弾性ブロックと上下脊椎関節４００、４５０との接触密接性が良好になる。また、術後の癒合の時にも、弾性案内溝は弾性ブロックに自動的微調整の機能を与えるので、術後の癒合速度を促進する。
【００２４】
図８は、椎体間修復器に補助装置を組み合わせた実施形態を示す図である。図８において、符号１００′は本発明に係る椎体間修復器としての弾性ブロックを、符号４００，４５０は脊椎関節を、符号５００は補助固定装置を、符号５１０，５２０，５３０はそれぞれ補助固定装置５００のネジ、骨板、ナットを示す。このように、弾性ブロック１００′は、種々の補助固定装置５００と併せて使用することも可能である。
【００２５】
なお、以上説明した実施形態は、本発明を限定するために記載されたものではなく、本発明の技術的思想内において当業者により種々変更が可能である。
【００２６】
【発明の効果】
以上述べたように、発明によれば、上下脊椎関節間に配置される椎体間修復器には弾性案内溝が形成されているので、椎体間修復器は弾性案内溝によって付与される弾性によりその形状を自動的に微調整し、その結果、椎体間修復器と上下脊椎関節との接触密接性が良好になる。また、術後の癒合の時にも、弾性案内溝は椎体間修復器弾性に自動的微調整の機能を与えるので、術後の癒合速度を促進することができる。また、左右両側面の間の距離を上下接触面の間の距離より小さくすると、手術に有利となる。また、上下接触面に突起物を形成すると、椎体間修復器と脊椎関節の固定に有利となる。
【図面の簡単な説明】
【図１】 本発明の好ましい実施形態の斜視図である。
【図２】 図１に示す椎体間修復器の側面を示す図である。
【図３】 図１に示す椎体間修復器の上方接触面を示す図である。
【図４】 図１に示す椎体間修復器の後面を示す図である。
【図５】 弾性ブロックを使用した手術を説明するための斜視図である。
【図６】 図５に続く、椎体間修復器を使用した手術を説明するための斜視図である。
【図７】 椎体間修復器を１箇所に２個使用した場合を示す斜視図である。
【図８】 椎体間修復器に補助装置を組み合わせた実施形態を示す図である。
【符号の説明】
１００…弾性ブロック（椎体間修復器）、
１１０，１１１…弾性案内溝、
１２０…上方接触面、
１３０…下方接触面、
１４０…後面、
１６０…側面、
１２１，１３１…突起物、
１４１…ジグ孔、
１４２，１４３…ジグ溝、
４００，４５０…脊椎関節、
５００…補助固定装置、
５１０…ネジ、
５２０…骨板、
５３０…ナット。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an interbody repair device, and more particularly, to an interbody repair device that can be slightly deformed depending on various states of force applied thereto.
[0002]
[Prior art and problems to be solved by the invention]
A conventional interbody repair device is a hollow cylindrical body having a hole formed on its outer periphery, and is configured by adding crushed bone to the inside thereof. A typical example of such is the BAKTM Interbody Fusion System, manufactured by US SPINTEC, modified by US Pat. Nos. 4,501,269 and 5,015,247. Can be mentioned.
[0003]
The system is an almost rigid hollow cylindrical body, which is constructed by adding crushed bones inside, so that after implantation in the human body, the relative positions of the spinal joints are more closely matched to the space between the spinal joints. It cannot be finely adjusted at the position where
[0004]
The present inventor has designed a new intervertebral body repair device having such a drawback (see US Pat. No. 5,423,817), but the invention still has many drawbacks. It was. For example, when a cylindrical spring is implanted, there are disadvantages such as a large incision, a long operation time, and a slow postoperative fusion.
[0005]
Therefore, the present inventor newly designed the interbody repair device of the present invention due to the drawbacks of the above-described conventionally known interbody repair device, and the interbody repair device of the present invention is an elastic guide groove. Therefore, the distance between the left and right side surfaces is smaller than the distance between the upper and lower contact surfaces, which is advantageous for surgery. Further, the protrusions on the upper and lower contact surfaces are advantageous for fixing the interbody repair device and the spinal joint of the present invention.
[0006]
Accordingly, it is an object of the present invention to provide an improved interbody repair device. Another object of the present invention is to provide an interbody repair device having an elastic guide groove. Another object of the present invention is to provide an interbody repair device in which the upper and lower contact surfaces substantially exhibit a long convex arc surface, and the left and right side surfaces are substantially parallel to each other.
[0007]
[Means for Solving the Problems]
In the present invention, the terms “up”, “down”, “front”, “back”, “left”, “right” are all used to indicate “up”, “down”, “front”, “back”, “left”, and “right” when a person stands upright.
[0008]
The interbody repair device of the present invention is an elastic block having an upper contact surface and a lower contact surface brought into contact with the spinal joint, and both left and right side surfaces connected to the upper and lower contact surfaces. The upper contact surface is formed with a plurality of descending elastic guide grooves extending substantially parallel to each other and extending to a depth not reaching the lower contact surface from the surface and opening to the left and right side surfaces , The lower contact surface includes one or a plurality of ascending elasticities extending from the surface upward to a depth that does not reach the upper contact surface and opening to both the left and right side surfaces and substantially parallel to the descending elastic guide grooves. guide grooves are formed, and the upper row elastic guide groove descending elastic guide grooves are arranged in alternating order for each guide groove of one or more of the group, exhibits a flat surface and the left surface and the right side surface, The upper contact surface and the lower The contact surface, and has a convex front and rear has intermediate bulge small.
[0009]
Examples of the material of the elastic block include any biocompatible material applied to orthopedic surgery, such as stainless steel (SUS316LVM, etc.), titanium alloy (Ti-6-4, etc.), cobalt-molybdenum-nickel alloy, and the like. It is done.
[0010]
It is preferable that the left side surface and the right side surface of the elastic block are substantially flat, and it is more preferable that both are substantially parallel to each other.
[0011]
The upper contact surface and the lower contact surface of the elastic block have a convex surface, preferably a convex arc surface, which is substantially small in the front and rear direction and bulged in the middle, and each of the convex surfaces has a plurality of protrusions. Preferably it is formed. The protrusion may be an irregular protrusion or a regular protrusion, for example, a line protrusion or a tooth protrusion.
[0012]
The upper contact touch surface has one or a plurality of descending elastic guide grooves (that is, a direction from the upper contact surface to the lower contact surface), preferably a plurality of elastic guide grooves, particularly 2 to 5 It is preferable to form an elastic guide groove.
[0013]
The lower contact touch surface has one or more elastic guide grooves (that is, a direction from the lower contact surface to the upper contact surface), preferably a plurality of elastic guide grooves, particularly 2 to 5 elastic guide grooves. It is preferable to form an elastic guide groove.
[0014]
The ascending elastic guide groove and the descending elastic guide groove are preferably substantially parallel to each other, and when there are a plurality of ascending elastic guide grooves and descending elastic guide grooves, The upper elastic guide groove and the lower elastic guide groove are, for example, “lower, upper, lower, upper, lower, upper, upper”, “lower, lower, upper, lower, upper,” It is preferable to arrange them in an alternating order.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, in order to understand the features, objects, and effects of the present invention, the most preferred embodiments of the present invention will be described with reference to the drawings. As described above, in the present invention, the terms “up”, “down”, “front”, “back”, “left”, and “right” all refer to “up”, “down”, “front”, “back”, “left”, and “right” when a person stands upright. Use as
[0016]
FIG. 1 is a perspective view of a preferred embodiment of the present invention. In FIG. 1, reference numeral 100 indicates an elastic block as an interbody repair device, and the elastic block 100 has an upper contact surface 120 and a lower contact surface 130. The upper contact surface 120 is formed with a descending elastic guide groove 110 extending downward from the surface to a predetermined depth, and the lower contact surface 130 is extending upward from the surface to a predetermined depth. An elastic guide groove 111 is formed. As shown in the figure, there are two ascending elastic guide grooves 111 and three descending elastic guide grooves 110, which are arranged in an alternating order (that is, in the order of descending line, ascending line, descending line, ascending line, descending line).
[0017]
In addition, a tooth-like protrusion 121 is formed on the upper contact surface 120 of the elastic block 100, and a tooth-like protrusion 131 is formed on the lower contact surface 130. The elastic block 100 further includes a rear surface 140 and a side surface 160, and a jig hole 141 and jig grooves 142 and 143 are formed on the rear surface 140.
[0018]
FIG. 2 is a side view of the interbody repair device shown in FIG. 2, the definitions of reference numerals 100, 110, 111, 121, 131, and 141 are the same as those in FIG. Reference numerals 120 and 130 respectively denote an upper contact surface and a lower contact surface of the elastic block 100, and a screw thread is indicated by a broken line in the jig hole 141 in the drawing.
[0019]
FIG. 3 is a view showing an upper contact surface of the interbody repair device shown in FIG. 1. 3, the definitions of reference numerals 110, 120, and 121 are the same as those in FIG.
[0020]
FIG. 4 is a view showing a rear surface of the interbody repair device shown in FIG. 1. 4, the definitions of reference numerals 120, 130, 141, 142, and 143 are the same as those in FIGS. Reference numeral 141 denotes a jig hole of the elastic block 100. On the rear surface, tooth-like projections 121 and 131 are seen as shown in the white portion. The tooth-like projections shown in the black portion are substantially smaller in the front and back of the upper and lower contact surfaces 120 and 130 and are intermediate. Each protrusion is formed on a convex arc surface having a large.
[0021]
5 and 6 are perspective views for explaining a surgery using an elastic block. As shown in FIG. 5, first, the two spinal joints 400 and 450 are opened by the support jig 200, and the elastic block 100 as an interbody repair device attached to the tip of the jig 300 is faced upward. Implanted between spinal joints 400 and 450. Next, as shown in FIG. 6, the elastic block 100 in FIG. 5 is rotated in the direction shown in FIG. 6, so that the upper contact surface 120 and the lower contact surface 130 of the elastic block 100 are connected to the spinal joints 400 and 450, respectively. Contact.
[0022]
FIG. 7 is a perspective view showing a case where two elastic blocks are used in one place. As shown in FIG. 7, another elastic block 100 ′ is implanted by the method shown in FIGS. In addition, the protrusion formed in the elastic blocks 100 and 100 ′ in FIGS.
[0023]
As described above, according to the present embodiment, the elastic blocks 100 and 100 ′ serving as the two interbody repair devices disposed between the spinal joints 400 and 450 are each formed with the elastic guide groove. Therefore, the shape of the two elastic blocks is automatically finely adjusted by the elasticity provided by the elastic guide groove, and as a result, the contact closeness between the elastic block and the upper and lower spine joints 400 and 450 is improved. In addition, the elastic guide groove imparts an automatic fine adjustment function to the elastic block also at the time of postoperative fusion, thereby promoting the postoperative fusion speed.
[0024]
FIG. 8 is a view showing an embodiment in which an auxiliary device is combined with an interbody repair device. In FIG. 8, reference numeral 100 'denotes an elastic block as an interbody repair device according to the present invention, reference numerals 400 and 450 denote spinal joints, reference numeral 500 denotes an auxiliary fixing device, and reference numerals 510, 520 and 530 denote auxiliary fixings. The screws, bone plates and nuts of the device 500 are shown. As described above, the elastic block 100 ′ can be used in combination with various auxiliary fixing devices 500.
[0025]
The embodiments described above are not described for limiting the present invention, and various modifications can be made by those skilled in the art within the technical idea of the present invention.
[0026]
【The invention's effect】
As described above, according to the invention, since the elastic guide groove is formed in the interbody repair device arranged between the upper and lower spine joints, the interbody repair device is provided with the elastic force provided by the elastic guide groove. Automatically fine-tunes the shape, and as a result, the contact tightness between the interbody repair device and the upper and lower spine joints is improved. In addition, the elastic guide groove gives an automatic fine adjustment function to the intervertebral body repair device elasticity at the time of postoperative fusion, so that the postoperative fusion speed can be accelerated. Further, if the distance between the left and right side surfaces is smaller than the distance between the upper and lower contact surfaces, it is advantageous for surgery. In addition, forming protrusions on the upper and lower contact surfaces is advantageous for fixing the interbody repair device and the spinal joint.
[Brief description of the drawings]
FIG. 1 is a perspective view of a preferred embodiment of the present invention.
2 is a side view of the interbody repair device shown in FIG. 1. FIG.
3 is a view showing an upper contact surface of the interbody repair device shown in FIG. 1. FIG.
4 is a view showing a rear surface of the interbody repair device shown in FIG. 1. FIG.
FIG. 5 is a perspective view for explaining a surgery using an elastic block.
FIG. 6 is a perspective view for explaining an operation using the interbody repair device following FIG. 5;
FIG. 7 is a perspective view showing a case where two interbody repair devices are used at one place.
FIG. 8 is a view showing an embodiment in which an auxiliary device is combined with an interbody repair device.
[Explanation of symbols]
100 ... elastic block (interbody repair device),
110, 111 ... elastic guide groove,
120 ... upper contact surface,
130 ... lower contact surface,
140 ... rear surface,
160 ... side,
121, 131 ... projections,
141 ... Jig hole,
142, 143 ... jig grooves,
400, 450 ... spinal joint,
500 ... auxiliary fixing device,
510 ... screw,
520 ... bone plate,
530 ... nut.

Claims (8)

脊椎関節に接触させられる上方接触面および下方接触面と、該上方および下方接触面に連なる左右の両側面とを有し、ブロック状を呈した椎体間修復器であって、
前記上方接触面には、表面から下方に向けて前記下方接触面に達しない深さまで伸延するとともに前記左右の両側面に開口する、相互に略平行な複数の下行弾性案内溝が形成され、
前記下方接触面には、表面から上方に向けて前記上方接触面に達しない深さまで伸延するとともに前記左右の両側面に開口する、前記下行弾性案内溝と略平行な一つ又は複数の上行弾性案内溝が形成され、
前記上行弾性案内溝と前記下行弾性案内溝とは、一つ又は複数の群の案内溝ごとで交互の順に配列され、
前記左側面と前記右側面とは平面を呈し、
前記上方接触面と前記下方接触面とは、前後が小さく中間が膨出した凸面を呈していることを特徴とする椎体間修復器。An intervertebral body repair device having an upper contact surface and a lower contact surface brought into contact with a spinal joint, and both left and right side surfaces connected to the upper and lower contact surfaces, and having a block shape,
The upper contact surface is formed with a plurality of descending elastic guide grooves that extend from the surface downward to a depth that does not reach the lower contact surface and open to both the left and right side surfaces and are substantially parallel to each other,
The lower contact surface includes one or a plurality of ascending elasticities extending from the surface upward to a depth that does not reach the upper contact surface and opening to both the left and right side surfaces and substantially parallel to the descending elastic guide grooves. A guide groove is formed,
The ascending elastic guide grooves and the descending elastic guide grooves are arranged alternately in one or more groups of guide grooves,
The exhibits a flat surface and the left surface and the right side surface,
The intervertebral body repair device, wherein the upper contact surface and the lower contact surface have a convex surface with a small front and rear and a middle bulge. 前記上行弾性案内溝は、複数形成されている請求項１に記載の椎体間修復器。  The intervertebral body repair device according to claim 1, wherein a plurality of the ascending elastic guide grooves are formed. 前記上行弾性案内溝を上、前記下行弾性案内溝を下とした場合に、前記上行弾性案内溝と下行弾性案内溝とは、上下上下の交互の順に配列されている請求項２に記載の椎体間修復器。  The vertebra according to claim 2, wherein the ascending elastic guide groove and the descending elastic guide groove are arranged in an alternating order of up, down, up and down when the ascending elastic guide groove is set to the upper side and the descending elastic guide groove is set to the lower side. Interbody repair device. 前記左側面と前記右側面との間の距離は、前記上方接触面と前記下方接触面との間の最大距離より小さい請求項１、２又は３に記載の椎体間修復器。  The interbody repair device according to claim 1, 2, or 3, wherein a distance between the left side surface and the right side surface is smaller than a maximum distance between the upper contact surface and the lower contact surface. 前記上方接触面と前記下方接触面とに、それぞれ複数の突起物が形成されている請求項１、２又は３に記載の椎体間修復器。  The interbody repair device according to claim 1, wherein a plurality of protrusions are formed on each of the upper contact surface and the lower contact surface. 前記突起物は、歯状突起物又は列状突起物である請求項５に記載の椎体間修復器。  The interbody repair device according to claim 5, wherein the protrusion is a dentate protrusion or a line protrusion. 前記上方接触面と前記下方接触面とに、それぞれ複数の突起物が形成されている請求項４に記載の椎体間修復器。  The interbody repair device according to claim 4, wherein a plurality of protrusions are formed on each of the upper contact surface and the lower contact surface. 前記突起物は、歯状突起物又は列状突起物である請求項７に記載の椎体間修復器。  The interbody repair device according to claim 7, wherein the protrusion is a dentate protrusion or a row protrusion.
JP2000092382A 1999-07-20 2000-03-29 Interbody repair device Expired - Fee Related JP3704018B2 (en)

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