JPH10179622A - Vertebral implant - Google Patents

Vertebral implant

Info

Publication number
JPH10179622A
JPH10179622A JP8341332A JP34133296A JPH10179622A JP H10179622 A JPH10179622 A JP H10179622A JP 8341332 A JP8341332 A JP 8341332A JP 34133296 A JP34133296 A JP 34133296A JP H10179622 A JPH10179622 A JP H10179622A
Authority
JP
Japan
Prior art keywords
plate
part
portion
vertebral arch
cervical vertebra
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
JP8341332A
Other languages
Japanese (ja)
Inventor
Hideaki Iwano
Tatsuya Nemoto
Masakazu Takayasu
Jun Yoshida
田 純 吉
野 英 昭 岩
本 達 哉 根
安 正 和 高
Original Assignee
Mizuho Ika Kogyo Kk
瑞穂医科工業株式会社
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 Mizuho Ika Kogyo Kk, 瑞穂医科工業株式会社 filed Critical Mizuho Ika Kogyo Kk
Priority to JP8341332A priority Critical patent/JPH10179622A/en
Publication of JPH10179622A publication Critical patent/JPH10179622A/en
Application status is Pending legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical 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
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7071Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs

Abstract

PROBLEM TO BE SOLVED: To reduce time required for vertebral arch plastic operation of a spine, by providing a fixing means to fix a plate to be placed so as to bridge a bone prosthesis mounted between an ablated part or a cut-up part of an ablated part of a vertebral arch part of the vertebra and the bone prosthesis on the plate.
SOLUTION: When this vertebral implant is to be mounted on a cervical vertebra 1, a bone prosthesis 11 is mounted on an ablation part 6 from which a vertebral arch is ablated and a plate 12 is placed to bridge the ablated part 6 of the cervical vertebra 1 by inserting a screw 13 into a hole in the plate 12, and a lock nut 13a is screwed with a screw 13 of the bone prosthesis 11 protruded from the plate 12 to complete the mounting. In this case, pins 15, 15 protruded from the bone prosthesis 11 are engaged with the ablated part 6 of the cervical vertebra 1 to retain the prosthesis 11 on a prescribed position on the cervical vertebra 1, and an engaging part 16 equipped on the plate 12 is engaged with the cervical vertebra 1 to fix the prosthesis 11 on the prescribed position without slipping.
COPYRIGHT: (C)1998,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、たとえば頸椎椎骨の椎弓形成手術に用いられる脊椎インプラントに関する。 The present invention relates to relates to, for example, spinal implant for use in vertebral arch plastic surgery cervical vertebrae.

【0002】 [0002]

【従来の技術】人間の脊柱は7個の頸椎と12個の胸椎と5個の腰椎と5個の仙椎が融合した仙骨と融合した尾骨から構成されている。 BACKGROUND OF THE INVENTION human spine is composed of seven cervical vertebrae and twelve thoracic and five lumbar and five sacral vertebrae are fused fused to the sacrum coccyx. 正常な頸椎椎骨1は、図5に示すように、椎管が通る部分2と神経が通る椎孔3を有し、椎孔3に隣接する椎弓4には棘突起4aが形成されており、椎弓4は椎孔3を通る神経に影響を与えない構造をなしている。 Normal cervical vertebra 1, as shown in FIG. 5 has a portion 2 and vertebral foramen 3 that nerve passes through the vertebral tube, the vertebral arch 4 adjacent to the vertebral foramen 3 is formed spinous process 4a is , vertebral arch 4 is without a structure that does not affect the nerve that passes through the vertebral foramen 3. ところで、正常な頸椎椎骨1に異常が発生すると、頸椎椎骨1は、図6に示すように、点線で示す椎弓4が椎孔3の方向に張り出し、椎弓4の張り出し部分5が椎孔3を通る神経を圧迫し、運動機能に影響を与えることになる。 Incidentally, when abnormality in normal cervical vertebra 1 occurs, cervical vertebra 1, as shown in FIG. 6, lamina 4 shown by a dotted line protruding in the direction of the vertebral foramen 3, the overhang 5 of vertebral arch 4 vertebral foramen 3 pressure on the nerve that passes through the, will affect the motor function. 椎弓4の張り出し部分5が椎孔3 Vertebral arch overhang 5 is the vertebral foramen 3 of 4
を通る神経を圧迫する場合の治療法として椎弓形成手術が知られている。 Lamina plastic surgery is known as a treatment in the case of compressing the nerves through.

【0003】上記椎弓形成手術には、頸椎椎骨1の椎弓4の部分および張り出し部分5を切除し、張り出し部分が椎孔3を通る神経を圧迫しないようにする方式のものと、棘突起4aを切除し椎弓4を切り起こすことで張り出し部分5が椎孔3を通る神経を圧迫しないようにする方式のものとがある。 [0003] the vertebral arch forming surgery, and of a type to allow excised portions and overhang 5 pedicle 4 of cervical vertebrae 1 and overhang do not compress the nerve through the vertebral foramen 3, spinous portion 5 projecting by cutting and raising a vertebral arch 4 was excised 4a is and those methods that do not compress the nerve through the vertebral foramen 3.

【0004】頸椎椎骨1の椎弓4の部分を切除する椎弓形成手術は、図7に示すように、頸椎椎骨1の椎弓4の部分を切除し、この切除部分6に図8に示すような骨補填片7を装着し、骨補填片7を頸椎椎骨1に糸により縫合し、骨補填片7を頸椎椎骨1の椎弓4の部分として用いるものである。 [0004] laminoplasty surgery to remove portions of the vertebral arch 4 cervical vertebra 1, as shown in FIG. 7, it was excised portion of the vertebral arch 4 cervical vertebra 1, shown in Figure 8 to the cutting portion 6 bone filling piece 7 mounted as a bone filling piece 7 sutured by yarn cervical vertebra 1, it is to use a bone filling piece 7 as part of the lamina 4 cervical vertebra 1.

【0005】頸椎椎骨1の椎弓4を切り起こす椎弓形成手術は、図9に示すように棘突起4aを切除し、図示しないサージェアトームを用いて棘突起4aを切除した椎弓4に中央部に切れ目9aと両端側に切り込み9b,9 [0005] lamina plastic surgery cutting and raising lamina 4 cervical vertebra 1, was excised spinous process 4a as shown in FIG. 9, the central portion vertebral arch 4 was resected spinous processes 4a using Sajeatomu not shown to cut the slit 9a and both ends 9b, 9
bを図10に示すように設け、切れ目9aにより分断された椎弓部分4b,4bを切り込み9bに沿って切り起こし、この切り起こし部分4b,4bの間に図11に示すように骨補填片7を装着し、骨補填片7を椎弓4の切り起こし部分4b,4bに糸により縫合し、骨補填片7 b The provided as shown in FIG. 10, cut 9a by shed vertebral arch portion 4b, raised outright along 9b cut to 4b, the cut and raised portion 4b, the bone filling piece, as shown in FIG. 11 between 4b 7 is mounted, and sutured thread bone filling piece 7 cut and raised portions 4b of the vertebral arch 4, the 4b, the bone filling piece 7
を頸椎椎骨1の椎弓4の部分として用いるものである。 The is to use as part of the lamina 4 cervical vertebra 1.

【0006】 [0006]

【発明が解決しようとする課題】上記頸椎の椎弓形成手術に用いられる骨補填片は、頸椎椎骨の切除部分または椎弓の切り起こし部分の間に嵌合するような形状に成形されているが、骨補填片は、セラミック成形品であるため高価であり、しかも、骨補填片の頸椎椎骨への固定は糸縫合手段による行なわれるため、この操作に熟練度と相当の時間を必要とする。 SUMMARY OF THE INVENTION It is an object of the bone filling pieces used in the vertebral arch plastic surgery of the cervical spine is formed into a shape to fit between the cut portions or cut and raised portions of the vertebral arch of the cervical vertebrae but bone filling pieces are expensive for a ceramic shaped article, moreover, fixed to the cervical vertebrae of the bone filling pieces to be done by the thread suturing means, requiring skill and considerable time for this operation .

【0007】本発明は上記した点に鑑みてなされたもので、脊椎椎骨の椎弓形成手術の手術に要する時間を短縮できる脊椎インプラントを提供することを目的とする。 [0007] The present invention has been made in view of the above, and an object thereof is to provide a spinal implant which can shorten the time required for surgery of the vertebral arch plastic surgery of the spine vertebrae.

【0008】 [0008]

【課題を解決するための手段】本発明の脊椎インプラントは、脊椎椎骨の椎弓部分を切除して形成される切除部分または椎弓部分の切り起こし部分の間に装着される骨補填片と、脊椎椎骨の切除部分を橋絡するように配置されたプレートと、骨補填片をプレートに固定するための固定手段とから構成される。 Spinal implant of the present invention SUMMARY OF] includes a bone filling piece is mounted between the cut and raised portion of the cutting portion or the vertebral arch portion is formed by cutting the vertebral arch portion of the spine vertebrae, configured to cut part of the spine vertebrae from a plate disposed so as to bridge, and fixing means for fixing the bone filling pieces to the plate.

【0009】本発明の脊椎インプラントは、骨補填片の脊椎椎骨に接する面にピンを設けることで骨補填片の脊椎椎骨への固定を確実にしたり、プレートの脊椎椎骨に接する面に係止部を設けることでプレートを脊椎椎骨の所定の位置に固定することができる。 [0009] Spinal implants of the present invention, or to ensure the fixation of the spine vertebra bone filling piece by providing a pin on a surface contacting the spinal vertebra bone filling piece, the engaging portion on a surface contacting the spinal vertebra plate plates can be fixed in place in the spinal vertebra by providing a.

【0010】 [0010]

【発明の実施の形態】以下本発明の実施の形態を図面を参照して説明する。 DETAILED DESCRIPTION OF THE INVENTION be described with reference to the drawings showing an embodiment invention. なお、図1および図2において図5 Note that FIG. 5 in FIG. 1 and FIG. 2
および図6と同一部材については同一符号を付す。 Denoted by the same reference numerals and 6 the same member.

【0011】図1は本発明による脊椎インプラントを頸椎椎骨の椎弓形成手術に適用した例を示すものであり、 [0011] Figure 1 shows an example of a spinal implant according to the present invention is applied to the vertebral arch plastic surgery cervical vertebrae,
脊椎インプラント10は、頸椎椎骨1の椎弓4の切除部分6に取付けられている。 The spinal implant 10 is attached to the cutting portion 6 of the lamina 4 cervical vertebra 1.

【0012】上記脊椎インプラント10は、図2に示すように、頸椎椎骨1の椎弓を切除して形成される切除部分6に装着される骨補填片11と、頸椎椎骨1の切除部分6を橋絡するように配置されたプレート12と、骨補填片11をプレートに固定するための固定手段13とから構成されている。 [0012] The spinal implant 10, as shown in FIG. 2, the bone filling piece 11 which is mounted on the cutting portion 6 formed by cutting the vertebral arch of the cervical vertebrae 1, the cutting portion 6 of the cervical vertebrae 1 and arranged plate 12 so as to bridge, and a fixing means 13 for for fixing the bone filling pieces 11 to the plate.

【0013】上記骨補填片11は、ステンレス(SUS [0013] The bone filling pieces 11, stainless steel (SUS
316系)またはチタン合金を材料として頸椎椎骨1の切除部分6の形状に対応した形状に成形された全体形状を扇形状とした本体14と、この本体14の両側面に突設されたピン15,15とを有する。 316 system) or the overall shape, which is formed into a shape corresponding to the shape of the cutting portion 6 of the cervical vertebral 1 and body 14 and fan shape as a titanium alloy material, a pin 15 projecting from the both sides of the main body 14 , and a 15. この本体14の大径面にはねじ13が外方に延びるように突設されている。 Screw 13 is protruded so as to extend outwardly for large diameter surface of the body 14. このねじ13にはロックナット13aが螺着される。 Lock nut 13a is screwed into the screw 13.

【0014】上記プレート12は、ステンレス(SUS [0014] The plate 12 is, stainless steel (SUS
316系)またはチタン合金の薄板を弓形に成形して形成されるものであり、両端面に鋸歯のような係止部16 316-based) or those formed of a thin plate of titanium alloy is molded into an arcuate engaging portion 16 such as serrated on both end faces
が形成されている。 There has been formed. この係止部16はプレート12のスリップを防止し、プレート12を頸椎椎骨1の所定の位置に固定する。 The engaging portion 16 prevents the slippage of the plate 12 to secure the plate 12 to a predetermined position of the cervical vertebra 1. このプレート12の中央部分にはねじ1 Screw 1 in the center portion of the plate 12
3が通る孔17が形成されている。 3 holes 17 through which are formed.

【0015】つぎに作用を説明する。 [0015] Next, a description will be given of the operation. 脊椎インプラント10を頸椎椎骨1に取付けるには、骨補填片11を頸椎椎骨1の椎弓を切除して形成される切除部分6に装着し、プレート12をプレート12に設けた孔17に骨補填片11のねじ13を通すようにして頸椎椎骨1の切除部分6を橋絡するように配置し、プレート12より突き出る骨補填片11のねじ13にロックナット13aを螺着することで行なう。 In mounting the spinal implant 10 in cervical vertebra 1, bone filling bone filling piece 11 is attached to the cutting portion 6 formed by cutting the vertebral arch of the cervical vertebrae 1, the hole 17 having a plate 12 to the plate 12 so as to pass the screw 13 of the piece 11 arranged cutting portion 6 of the cervical vertebrae 1 to bridging performed by screwing the lock nut 13a to the screw 13 of the bone filling piece 11 projecting from the plate 12. この場合、骨補填片11に突設されたピン15,15が頸椎椎骨1の切除部分6に係止されるので、骨補填片11は、頸椎椎骨1の所定の位置に保持され、また、プレート12に設けた係止部16が頸椎椎骨1に係止されるので、プレート12が固定された後スリップすることがなく、所定の位置に固定される。 In this case, the pin 15, 15 projecting from the bone filling piece 11 is locked to the cutting portion 6 of the cervical vertebrae 1, bone filling piece 11 is held in place cervical vertebra 1, also since the engaging portion 16 provided on the plate 12 is locked to the cervical vertebra 1, without slipping after plate 12 has been fixed, it is fixed to a predetermined position.

【0016】図3および図4は本発明の他の実施の形態を示し、この実施の形態に用いられる脊椎インプラント10は、図2に示す脊椎インプラントと同じ構造のものであるが、骨補填片11は頸椎椎骨1の椎弓4の切り起こし部分4b,4bの間に形成される空間に嵌合される形状をなしている。 [0016] Figures 3 and 4 show another embodiment of the present invention, the spinal implant 10 used in this embodiment is of the same structure as the spinal implant illustrated in FIG. 2, the bone filling piece 11 has a shape to be fitted to the space formed between the cut and raised portions 4b, 4b of the lamina 4 cervical vertebra 1.

【0017】脊椎インプラント10を頸椎椎骨1に取付けるには、骨補填片11を頸椎椎骨1の椎弓4の切り起こし部分4b,4bの間に装着し、プレート12をプレート12に設けた孔17に骨補填片11のねじ13を通すようにして頸椎椎骨1の椎弓4の切り起こし部分4 [0017] mounting the spinal implant 10 in cervical vertebra 1, fitted with a bone filling piece 11 cut and raised portions 4b of the lamina 4 cervical vertebra 1, during 4b, holes are provided plate 12 to the plate 12 17 cut of the pass a screw 13 of the bone filling piece 11 lamina 4 cervical vertebrae 1 and raised portions 4
b,4bを橋絡するように配置し、プレート12より突き出る骨補填片11のねじ13にロックナット13aを螺着することで行なう。 b, arranged 4b the so bridging performed by screwing the lock nut 13a to the screw 13 of the bone filling piece 11 projecting from the plate 12.

【0018】上記実施の形態では、脊椎インプラントを頸椎椎骨に適用したものについて説明したが、脊椎インプラントは胸椎椎骨や腰椎椎骨に適用できるのはもちろんである。 [0018] In the above embodiment, the spinal implant has been described applied to a cervical vertebra, the spinal implant is of course applicable to thoracic vertebrae and lumbar vertebrae.

【0019】なお、上記実施の形態では、骨補填片11 [0019] In the above embodiment, the bone filling piece 11
をプレート12に固定する固定手段として、ねじとロックナットを用いたが、骨補填片11をプレート12にゆるむことなく固定できるものであれば、スナッブビンのような固定手段であってもよい。 As fixing means for fixing to the plate 12, although using a screw and lock nut, as long as it can fix without loosening the bone filling pieces 11 to the plate 12, may be a fixing means such as a Sunabbubin.

【0020】 [0020]

【発明の効果】以上述べたように本発明によれば、脊椎椎骨の椎弓形成手術の手術時間を短縮することができる。 According to the present invention as described above, according to the present invention, it is possible to shorten the operation time of the vertebral arch plastic surgery of the spine vertebrae.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明による脊椎インプラントの頸椎椎骨へ取付けた状態を示す斜視図。 Perspective view showing a state attached to the cervical vertebrae of a spinal implant according to the invention; FIG.

【図2】本発明による脊椎インプラントの頸椎椎骨へ取付ける前の状態を示す斜視図。 Perspective view showing a state before attachment to cervical vertebrae of a spinal implant according to the invention, FIG.

【図3】本発明による脊椎インプラントの他の実施の形態の図1に対応する図。 Corresponding diagram to Figure 1 of another embodiment of a spinal implant according to the invention, FIG.

【図4】本発明による脊椎インプラントの他の実施の形態の図2に対応する図。 Corresponding Figure 2 of another embodiment of a spinal implant according to the invention; FIG.

【図5】正常な頸椎椎骨を示す図。 FIG. 5 is a diagram showing the normal cervical vertebrae.

【図6】異常な頸椎椎骨を示す図。 FIG. 6 shows an abnormal cervical vertebrae.

【図7】異常な頸椎椎骨から椎弓部分を切除した状態を示す図。 7 is a diagram showing a state in which laminectomy portion from the abnormal cervical vertebrae.

【図8】従来の頸椎の椎弓形成手術を示す図。 FIG. 8 is a diagram showing the vertebral arch plastic surgery of a conventional cervical spine.

【図9】異常な頸椎椎骨から棘突起を切除した状態を示す図。 9 is a diagram showing a state in which excised spinous processes from abnormal cervical vertebrae.

【図10】棘突起を切除した異常な頸椎椎骨の椎弓部分に切れ目と切り込みを入れた状態を示す図。 10 is a view showing a state in which an incision and cut the vertebral arch portion of abnormal cervical vertebrae were excised spinous process.

【図11】棘突起を切除した異常な頸椎椎骨の椎弓部分を切り起こした状態を示す図。 FIG. 11 shows a state in which cut and raised vertebral arch portion of abnormal cervical vertebrae were excised spinous process.

【図12】従来の頸椎の椎弓形成手術を示す図。 12 is a diagram showing a vertebral arch plastic surgery conventional cervical.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 頸椎椎骨 4 椎弓部分 4a 棘突起 4b 切り起こし部分 6 切除部分 10 脊椎インプラント 11 骨補填片 12 プレート 13 固定手段 15 ピン 1 cervical vertebra 4 vertebral arch portions 4a spinous process 4b cut-and-raised portions 6 cut portion 10 spinal implant 11 bone filling piece 12 plate 13 fixing means 15 pin

Claims (5)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】脊椎椎骨の椎弓部分を切除して形成される切除部分または椎弓部分の切り起こし部分の間に装着される骨補填片と、脊椎椎骨の切除部分または椎弓部分の切り起こし部分を橋絡するように配置されたプレートと、骨補填片をプレートに固定するための固定手段とを有する脊椎インプラント。 1. A bone filling piece is mounted between the cut and raised portion of the cutting portion or the vertebral arch portion is formed by cutting the vertebral arch portion of the spine vertebrae, cut the cutting portion or the vertebral arch portion of the spine vertebrae spinal implant having a plate arranged to bridge the portion raised, and a fixing means for fixing the bone filling pieces to the plate.
  2. 【請求項2】骨補填片の脊椎椎骨に接する面にピンを設けたことを特徴とする請求項1に記載の脊椎インプラント。 2. A spinal implant according to claim 1, characterized in that a pin in the surface contacting the spinal vertebra bone filling piece.
  3. 【請求項3】プレートの脊椎椎骨に接する面に係止部を設けたことを特徴とする請求項1に記載の脊椎インプラント。 3. A spinal implant according to claim 1, characterized in that a locking portion on a surface contacting the spinal vertebra plate.
  4. 【請求項4】固定手段がねじ手段であることを特徴とする請求項1に記載の脊椎インプラント。 The spinal implant of claim 1, wherein the fixing means is characterized in that it is a screw means.
  5. 【請求項5】固定手段がスナップピン手段であることを特徴とする請求項1に記載の脊椎インプラント。 The spinal implant of claim 1, wherein the fixing means is characterized in that it is a snap pin means.
JP8341332A 1996-12-20 1996-12-20 Vertebral implant Pending JPH10179622A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8341332A JPH10179622A (en) 1996-12-20 1996-12-20 Vertebral implant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8341332A JPH10179622A (en) 1996-12-20 1996-12-20 Vertebral implant

Publications (1)

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JPH10179622A true JPH10179622A (en) 1998-07-07

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Family Applications (1)

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JP8341332A Pending JPH10179622A (en) 1996-12-20 1996-12-20 Vertebral implant

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Country Link
JP (1) JPH10179622A (en)

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