JPH03275055A - Artificial intervertebral disk - Google Patents
Artificial intervertebral diskInfo
- Publication number
- JPH03275055A JPH03275055A JP2074524A JP7452490A JPH03275055A JP H03275055 A JPH03275055 A JP H03275055A JP 2074524 A JP2074524 A JP 2074524A JP 7452490 A JP7452490 A JP 7452490A JP H03275055 A JPH03275055 A JP H03275055A
- Authority
- JP
- Japan
- Prior art keywords
- disc
- bodies
- artificial intervertebral
- polymer
- intervertebral disk
- 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.)
- Granted
Links
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 8
- 239000013013 elastic material Substances 0.000 claims abstract description 6
- 229920002379 silicone rubber Polymers 0.000 claims abstract description 5
- 239000004945 silicone rubber Substances 0.000 claims abstract description 5
- 230000000975 bioactive effect Effects 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 3
- 229920006311 Urethane elastomer Polymers 0.000 claims description 2
- 239000005313 bioactive glass Substances 0.000 claims 1
- 229920000249 biocompatible polymer Polymers 0.000 claims 1
- 239000000919 ceramic Substances 0.000 abstract description 23
- 229920000642 polymer Polymers 0.000 abstract description 18
- 229910052588 hydroxylapatite Inorganic materials 0.000 abstract description 2
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 abstract description 2
- 238000005452 bending Methods 0.000 description 6
- 239000007822 coupling agent Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229910052586 apatite Inorganic materials 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002241 glass-ceramic Substances 0.000 description 2
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 208000003618 Intervertebral Disc Displacement Diseases 0.000 description 1
- 206010050296 Intervertebral disc protrusion Diseases 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000005312 bioglass Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 210000000944 nerve tissue Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 208000029761 vertebral disease Diseases 0.000 description 1
- 239000010456 wollastonite Substances 0.000 description 1
- 229910052882 wollastonite Inorganic materials 0.000 description 1
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
-
- 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
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Neurology (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Prostheses (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、椎間板ヘルニア等の疾患や事故によるを椎
の損傷等を治療するために用いられる人工椎間板に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an artificial intervertebral disc used to treat diseases such as intervertebral disc herniation and damage to the vertebrae caused by accidents.
人体のを椎は、第７図に示すように、縦一列に並ぶ硬い
椎体１と、上下に隣接する椎体１同士を連結する軟骨質
の椎間板２がら形成されている。As shown in FIG. 7, the vertebrae of the human body are made up of hard vertebral bodies 1 arranged in a vertical line and cartilaginous intervertebral discs 2 that connect vertically adjacent vertebral bodies 1 to each other.
上記を椎の疾患や損傷がひどい場合には、切開手術によ
って椎体１の全部ないし一部と椎間板２を除去し、その
部分に自家骨または人工椎体を埋め込むという外科的な
治療が行われている。If the vertebral disease or damage described above is severe, surgical treatment is performed in which all or part of the vertebral body 1 and the intervertebral disc 2 are removed through open surgery, and autologous bone or an artificial vertebral body is implanted in that area. ing.
このような人工椎体としては、従来がら、第８図および
第９図に示すように、アルミナセラミックスを略円板状
もしくは直方体状に成形したものが用いられている。ま
た、最近では、アパタイト結晶相を有する公知の生体活
性セラミックス材料や、これに高密度ポリエチレンもし
くはメタクリレート系樹脂等を配合したもの等が用いら
れている。As such an artificial vertebral body, as shown in FIGS. 8 and 9, alumina ceramics molded into a substantially disk shape or rectangular parallelepiped shape have been conventionally used. In addition, recently, known bioactive ceramic materials having an apatite crystal phase and materials blended with high-density polyethylene or methacrylate resins have been used.
しかしながら、これらの人工椎体は、いずれも、椎間板
等を切除した場合にその隙間を埋めて荷重を支持するス
ペーサーとして用いられているにすぎず、本来の椎間板
を挟む椎体のような柔軟性がない。したがって、人体の
運動に追従しきれず、無理な荷重が治療部にかかつて、
治療部あるいはその周辺部を再度損傷することが多く、
問題となっている。However, these artificial vertebral bodies are only used as spacers to fill the gap and support the load when an intervertebral disc is removed, and they do not have the same flexibility as the original vertebral bodies that sandwich the intervertebral disc. There is no. Therefore, it cannot follow the movement of the human body, and an unreasonable load is placed on the treatment area.
Often, the treated area or surrounding area is reinjured,
This has become a problem.
この発明は、このような事情に鑑みなされたもので、人
体の運動に充分に追従しうる柔軟な人工椎間板の提供を
その目的とする。The present invention was made in view of the above circumstances, and an object of the present invention is to provide a flexible artificial intervertebral disc that can sufficiently follow the movements of the human body.
上記の目的を達成するため、この発明の人工椎間板は、
生体活性セラミックス材料からなる２枚の略板状体が、
生体適合性ある高分子弾性材料からなる略板状体の上面
および下面に、それぞれ−体的に取り付けられていると
いう構成をとる。In order to achieve the above object, the artificial intervertebral disc of the present invention includes:
Two approximately plate-shaped bodies made of bioactive ceramic material,
The structure is such that they are physically attached to the upper and lower surfaces of a generally plate-shaped body made of a biocompatible polymeric elastic material.
すなわち、この発明は、従来の人工椎体が硬いブロック
状のものであったのに対し、弾力性ある高分子製の略板
状体を上下両側から硬いセラミックス製略板状体で挟ん
でサンドイッチ構造にしたものである。したがって、こ
の人工椎間板の上下のセラミックス部分を生体内の椎体
に接合すれば、あたかも椎間板が上下の椎体を柔軟に連
結しているように、弾力ある高分子板を中心にして上下
のセラミックス板がある程度自由に旋回する。したがっ
て、この人工椎間板は前屈、後屈等の動きに合わせて柔
軟に動くので、を椎全体がスムーズに動き、無理な荷重
がかからない。また、人工椎間板が上下のセラミックス
部と中央の弾性体部の３部分に分かれているため、それ
ぞれの部分の形状や材質を適宜に選択することにより、
患者の体格や他のを椎機能とのバランス等をみながら、
その人その人に合った人工椎間板を提供することができ
、きめこまやかな治療を施すことができる。In other words, whereas conventional artificial vertebral bodies were shaped like hard blocks, this invention creates a sandwich in which a roughly plate-shaped body made of elastic polymer is sandwiched between roughly plate-shaped bodies made of hard ceramics from both the upper and lower sides. It is structured. Therefore, if the upper and lower ceramic parts of this artificial intervertebral disc are bonded to the in-vivo vertebral body, the upper and lower ceramic parts can be connected with the elastic polymer disc at the center, just as if the intervertebral disc flexibly connects the upper and lower vertebral bodies. The board can rotate freely to some extent. Therefore, this artificial intervertebral disc moves flexibly according to movements such as forward bending and backward bending, so the entire vertebra moves smoothly and no unreasonable load is applied. In addition, since the artificial intervertebral disc is divided into three parts: the upper and lower ceramic parts and the central elastic body part, by appropriately selecting the shape and material of each part,
While looking at the patient's physique and balance with other spinal functions,
It is possible to provide an artificial intervertebral disc that is suitable for each person, and it is possible to provide detailed treatment.
つぎに、この発明の詳細な説明する。Next, this invention will be explained in detail.
この発明の人工椎間板は、例えば、第１図に示すような
３層構造になっている。すなわち、上下の２層がともに
セラミックス製の硬い円板状体１０．１１で形成され、
上記２層に挟まれた中間層が、弾力的な高分子からなる
円板状体１２で形成されている。The artificial intervertebral disc of the present invention has, for example, a three-layer structure as shown in FIG. That is, the upper and lower two layers are both formed of hard disk-shaped bodies 10 and 11 made of ceramics,
The intermediate layer sandwiched between the above two layers is formed of a disk-shaped body 12 made of an elastic polymer.
上記上層および下層となるセラミックス円板１０ １１
は、骨と化学的に結合し分離不可能となる生体活性を備
えていることが必要であり、生体活性を備えたセラミッ
クス材料からつくられる。Ceramic disks 10 and 11 to be the upper and lower layers
It must have bioactivity to chemically bond with bone and become inseparable, and it is made from a bioactive ceramic material.
上記セラミックス材料としては、例えば、ハイドロキシ
アパタイト、バイオガラス、ガラスセラミックス等があ
げられる。なかでも、結晶化ガラスであるアパタイト−
ウオラストナイト含有ガラスセラミックスが好適である
。Examples of the ceramic material include hydroxyapatite, bioglass, glass ceramics, and the like. Among them, apatite, which is crystallized glass,
Wollastonite-containing glass ceramics are preferred.
一方、上記セラミックス円板１０．１１に挟まれる高分
子円板１２は、生体適合性および一定の弾力性を備えて
いることが必要で、例えば生体用シリコーンゴムや生体
用ウレタンゴム等からつくられる。また、発泡によって
弾性が与えられたシリコーン樹脂やウレタン樹脂を用い
てもよい。ただし、これらの高分子弾性材料は、硬さ（
ＪＩＳ Ａ）が１０〜５０度の範囲内であることが望ま
しい。硬さが１０度未満では、軟らかすぎてを椎途中に
埋め込んだ場合に、負荷によってこの部分が簡単に変形
して前後左右方向にはみ出し、神経組織を圧迫するため
不適である。逆に、硬さが５０度を超えると硬すぎて得
られる人工椎間板に屈曲性がなくなり、使い勝手が悪い
。On the other hand, the polymer disk 12 sandwiched between the ceramic disks 10 and 11 needs to be biocompatible and have a certain elasticity, and is made of, for example, biological silicone rubber or biological urethane rubber. . Alternatively, silicone resin or urethane resin that has been given elasticity by foaming may be used. However, these polymeric elastic materials have a hardness (
JIS A) is preferably within the range of 10 to 50 degrees. If the hardness is less than 10 degrees, it is unsuitable because it is too soft and when implanted in the middle of a vertebra, this part easily deforms under load and protrudes in the front, back, left and right directions, compressing nerve tissue. On the other hand, if the hardness exceeds 50 degrees, it will be too hard and the resulting artificial intervertebral disc will have no flexibility, making it difficult to use.
そして、上記高分子弾性材料を略円板状に成形するには
、ゴムを用いるのであれば、所定形状の型内に未加硫（
未架橋）の樹脂材料を充填し、これを加硫（架橋）させ
て硬化させるようにすればよい。また、発泡樹脂を用い
る場合には、所定形状の発泡樹脂を切断によって円板状
に成形するようにすればよい。In order to mold the above-mentioned elastic polymer material into a substantially disk shape, if rubber is used, unvulcanized (
What is necessary is to fill it with an uncrosslinked resin material and vulcanize (crosslink) it to harden it. Further, when using a foamed resin, the foamed resin of a predetermined shape may be cut to form a disk shape.
この発明の人工椎間板は、上記高分子円板１２を中央に
置き、上下から前記セラミックス円板１０．１１でこれ
を挟むようにして３者を一体的に接合して得ることがで
きる。上記接合には、生体適合性ある接着剤が用いられ
る。このような生体適合性ある接着剤としては、シリコ
ーン系カップリング剤、チタン系カップリング剤、アル
ミニウム系カップリング剤等があげられ、なかでも、シ
リコーン系カップリング剤が好適である。The artificial intervertebral disc of the present invention can be obtained by placing the polymer disc 12 in the center and sandwiching it between the ceramic discs 10 and 11 from above and below, and joining the three parts together. A biocompatible adhesive is used for the above bonding. Examples of such biocompatible adhesives include silicone-based coupling agents, titanium-based coupling agents, aluminum-based coupling agents, and the like, with silicone-based coupling agents being particularly preferred.
なお、この発明の人工椎間板において、セラミックス円
板１０．１１および高分子円板１２の形状や厚み、ある
いは弾性体層の硬さは、患者の体格や他のを椎機能との
バランス等に応じて個別に設定することができる。例え
ば、高分子円板１２の外周面を、第２図に示すように、
凹状にへこませて全体がくの字状に屈曲しやすくしても
よいし、逆に、第３図に示すように、凸状の丸みを持た
せて上下方向にかかる荷重に対し強い抵抗力を示すよう
にしてもよい。In the artificial intervertebral disc of the present invention, the shape and thickness of the ceramic disc 10.11 and the polymer disc 12, or the hardness of the elastic body layer, may vary depending on the patient's physique and balance with other vertebral functions. can be set individually. For example, as shown in FIG. 2, the outer peripheral surface of the polymer disk 12 is
You can make it concave so that the whole body bends easily in a dogleg shape, or conversely, as shown in Figure 3, you can make it convex and rounded so that it has strong resistance to loads applied in the vertical direction. may also be shown.
また、セラミックス円板１０．１１の外側にくる面に、
第４図に示すような突起（あるいは筋状の溝）を形成す
るようにしてもよい、このようにすると、生体内に埋め
込む場合に、椎体（第７図参照）とセラミックス円板１
０．１１との接合面積が大きくなり、人工椎間板の固定
が強固に行われるようになる。In addition, on the outer surface of the ceramic disk 10.11,
It is also possible to form protrusions (or streak-like grooves) as shown in Fig. 4. In this way, when implanted in a living body, the vertebral body (see Fig. 7) and the ceramic disc
The joint area with 0.11 becomes larger, and the artificial intervertebral disc is firmly fixed.
さらに、上下のセラミックス円板１０．１１および高分
子円板１２の形状を、実際のを椎を模して、第４図に示
すように、円の片側がおしつぶれたような形状に設定し
てもよい。Furthermore, the shapes of the upper and lower ceramic discs 10 and 11 and the polymer disc 12 are set to resemble an actual vertebra, with one side of the circle crushed as shown in Figure 4. You may.
なお、上下のセラミックス板および高分子板は円板状に
限定されず、四角板状等、適宜の形状のものを用いるこ
とができる。Note that the upper and lower ceramic plates and polymer plates are not limited to a disk shape, but may have an appropriate shape such as a square plate shape.
つぎに、実施例について比較例と併せて説明する。Next, examples will be described together with comparative examples.
〔実施例１〜３〕
まず、生体活性結晶化ガラスの円板（直径４０■、厚み
５閣）を２枚作製した。また、シリコーンゴム（Ｑ７４
７２０．ダウコーニング社製、硬度３０度）を、直径４
０■、厚み１０閣の円板状に成形した。ただし、円周面
を凹状にへこませた、そして、これらを、接着剤（プラ
イマーＡ、信越化学社製）によって接合し、第２図に示
すような人工椎間板をつくった。[Examples 1 to 3] First, two discs (diameter 40 cm, thickness 5 cm) of bioactive crystallized glass were produced. In addition, silicone rubber (Q74
720. Made by Dow Corning, hardness 30 degrees), diameter 4
It was molded into a disk shape with a thickness of 0 mm and a thickness of 10 mm. However, the circumferential surface was recessed into a concave shape, and these were bonded together using an adhesive (Primer A, manufactured by Shin-Etsu Chemical Co., Ltd.) to create an artificial intervertebral disc as shown in FIG. 2.
また、シリコーンゴムの硬度を１０度（実施例２）、５
０度（実施例３）のそれぞれに変えた人工椎間板をつく
った。In addition, the hardness of silicone rubber was 10 degrees (Example 2), 5 degrees
Artificial intervertebral discs with different angles of 0 degrees (Example 3) were made.
このようにして得られた３種類の人工椎間板について、
試験速度１■／ｓｉｎで試料を圧縮することにより圧縮
ばね特性を測定した。その結果を第６図に示す。Regarding the three types of artificial intervertebral discs obtained in this way,
Compression spring properties were measured by compressing the sample at a test rate of 1/sin. The results are shown in FIG.
〔実施例４〜７〕
下記の表にしたがって、セラミックス円板のセラミック
ス材料および高分子円板の高分子弾性材料の種類を変え
た。それ以外は実施例１と同様にして人工椎間板をつく
った。[Examples 4 to 7] According to the table below, the ceramic material of the ceramic disk and the type of polymer elastic material of the polymer disk were changed. An artificial intervertebral disc was produced in the same manner as in Example 1 except for this.
そして、上記実施例１〜７の人工椎間板を死体標本に埋
め込んで、前方屈曲性、後方屈曲性、軸方向ねじり性、
側方屈曲性を測定し、実際の椎間板のそれと対比し、動
きの良否を評価した。The artificial intervertebral discs of Examples 1 to 7 above were implanted into cadaveric specimens, and the forward bending, backward bending, and axial torsion properties were improved.
Lateral bendability was measured and compared with that of an actual intervertebral disc to evaluate the quality of movement.
これらの結果を下記の表に示す。また、対照例として、
第８図に示す従来の人工椎体を準備し、上記と同様の評
価を行い、その結果を下記の表に併せて示した。These results are shown in the table below. Also, as a comparative example,
The conventional artificial vertebral body shown in FIG. 8 was prepared and evaluated in the same manner as above, and the results are also shown in the table below.
（以下余白）
以上の結果から、実施例品は、いずれも良好なばね圧縮
性を示し、また、対照品に比べて屈曲性に優れているこ
とがわかる。(The following is a blank space) From the above results, it can be seen that all of the example products exhibited good spring compressibility and were superior in flexibility compared to the control product.
以上のように、この発明の人工椎間板は、弾力性ある高
分子製の略板状体を上下両側から硬いセラミックス製略
板状体で挟んでサンドイッチ構造にしているため、この
人工椎間板は、弾力ある高分子板を中心にして上下のセ
ラミックス板がある程度自由に旋回する。したがって、
この人工椎間板は前屈、後屈等の動きに合わせて柔軟に
動くので、を椎全体がスムーズに動き、無理な荷重がか
からない、また、人工椎間板が上下のセラミックス部と
中央の弾性体部の３部分に分かれているため、それぞれ
の部分の形状や材質を適宜に選択することにより、患者
の体格や他のを椎機能とのバランス等をみながら、その
人その人に合った人工椎間板を提供することができ、き
めのこまかい治療を施すことができる。As described above, the artificial intervertebral disc of the present invention has a sandwich structure in which a substantially plate-like body made of an elastic polymer is sandwiched between the substantially plate-like bodies made of hard ceramics from both the upper and lower sides. The upper and lower ceramic plates rotate with some degree of freedom around a certain polymer plate. therefore,
This artificial intervertebral disc moves flexibly according to movements such as forward bending and backward bending, so the entire vertebra moves smoothly and no undue load is applied. Since it is divided into three parts, by appropriately selecting the shape and material of each part, we can create an artificial intervertebral disc that suits each person, taking into account the patient's physique and balance with other spinal functions. can be provided and can provide detailed treatment.
第１図はこの発明の一実施例を示す斜視図、第２図は他
の実施例を示す斜視図、第３図はさらに他の実施例を示
す斜視図、第４図はセラミックス円板の変形例を示す斜
視図、第５図はセラミックス円板および高分子円板の形
状の変形例を示す平面図、第６図は実施例品の圧縮ばね
特性を示す線図、第７図はを椎の構成を示す部分的な斜
視図、第８図および第９図はそれぞれ従来品の一例を示
す斜視図である。
１０．１１・・・セラミックス円板 １２・・・高分子
円板Fig. 1 is a perspective view showing one embodiment of the present invention, Fig. 2 is a perspective view showing another embodiment, Fig. 3 is a perspective view showing still another embodiment, and Fig. 4 is a perspective view showing a ceramic disk. FIG. 5 is a perspective view showing a modified example, FIG. 5 is a plan view showing a modified example of the shape of the ceramic disc and polymer disc, FIG. 6 is a diagram showing the compression spring characteristics of the example product, and FIG. A partial perspective view showing the structure of a vertebra, and FIGS. 8 and 9 are perspective views each showing an example of a conventional product. 10.11... Ceramic disk 12... Polymer disk
Claims (3)
体が、生体適合性ある高分子弾性材料からなる略板状体
の上面および下面に、それぞれ一体的に取り付けられて
いることを特徴とする人工椎間板。(1) Two substantially plate-like bodies made of a bioactive ceramic material are integrally attached to the upper and lower surfaces of the substantially plate-like body made of a biocompatible polymer elastic material, respectively. artificial intervertebral disc.
たは生体活性結晶化ガラスである請求項（１）記載の人
工椎間板。(2) The artificial intervertebral disc according to claim 1, wherein the bioactive ceramic material is bioactive glass or bioactive crystallized glass.
もしくはシリコーンゴムである請求項（１）または（２
）記載の人工椎間板。(3) Claim (1) or (2) wherein the biocompatible polymeric elastic material is urethane rubber or silicone rubber.
) Artificial intervertebral disc described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074524A JPH084606B2 (en) | 1990-03-23 | 1990-03-23 | Artificial disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2074524A JPH084606B2 (en) | 1990-03-23 | 1990-03-23 | Artificial disc |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03275055A true JPH03275055A (en) | 1991-12-05 |
| JPH084606B2 JPH084606B2 (en) | 1996-01-24 |
Family
ID=13549793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2074524A Expired - Lifetime JPH084606B2 (en) | 1990-03-23 | 1990-03-23 | Artificial disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084606B2 (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277141A (en) * | 1992-03-30 | 1993-10-26 | Tokai Rubber Ind Ltd | Artificial intervertebral disk |
| JPH06285099A (en) * | 1993-02-09 | 1994-10-11 | Acromed Corp | Spinal intervertebral disk prosthesis for exchanging injured spinal intervertebral disk |
| US6129763A (en) * | 1996-09-13 | 2000-10-10 | Chauvin; Jean-Luc | Expandable osteosynthesis cage |
| DE10337088A1 (en) * | 2003-08-12 | 2005-03-10 | Biedermann Motech Gmbh | Placeholder for vertebral bodies or intervertebral discs |
| JP2007275545A (en) * | 2006-04-04 | 2007-10-25 | Rnp Korea Co Ltd | Vertebral arch spacer for dilation operation of vertebral canal of cervical vertebra body |
| JP2007530093A (en) * | 2003-07-17 | 2007-11-01 | ネクスジェン スパイン、インク． | Intervertebral disc prosthesis |
| JP2010281742A (en) * | 2009-06-05 | 2010-12-16 | Nihon Univ | Intervertebral disk hardness measuring device |
| US9233011B2 (en) | 2006-09-15 | 2016-01-12 | Pioneer Surgical Technology, Inc. | Systems and apparatuses for inserting an implant in intervertebral space |
| US9314348B2 (en) | 2014-06-04 | 2016-04-19 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US9351852B2 (en) | 2002-05-23 | 2016-05-31 | Pioneer Surgical Technology, Inc. | Artificial disc device |
| US9408714B1 (en) | 2015-06-12 | 2016-08-09 | Amendia, Inc. | Artificial disc |
| US9445916B2 (en) | 2003-10-22 | 2016-09-20 | Pioneer Surgical Technology, Inc. | Joint arthroplasty devices having articulating members |
| USD907771S1 (en) | 2017-10-09 | 2021-01-12 | Pioneer Surgical Technology, Inc. | Intervertebral implant |
| US11147682B2 (en) | 2017-09-08 | 2021-10-19 | Pioneer Surgical Technology, Inc. | Intervertebral implants, instruments, and methods |
| US11219531B2 (en) | 2019-04-10 | 2022-01-11 | Wenzel Spine, Inc. | Rotatable intervertebral spacing implant |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006078663A2 (en) * | 2005-01-19 | 2006-07-27 | Nexgen Spine, Inc. | Elastomeric intervertebral disc prosthesis |
| JP5028276B2 (en) * | 2005-01-19 | 2012-09-19 | ケー２エム， インコーポレイテッド | Fixing elastomers to rigid structures |
-
1990
- 1990-03-23 JP JP2074524A patent/JPH084606B2/en not_active Expired - Lifetime
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05277141A (en) * | 1992-03-30 | 1993-10-26 | Tokai Rubber Ind Ltd | Artificial intervertebral disk |
| JPH06285099A (en) * | 1993-02-09 | 1994-10-11 | Acromed Corp | Spinal intervertebral disk prosthesis for exchanging injured spinal intervertebral disk |
| US6129763A (en) * | 1996-09-13 | 2000-10-10 | Chauvin; Jean-Luc | Expandable osteosynthesis cage |
| US6371989B1 (en) | 1996-09-13 | 2002-04-16 | Jean-Luc Chauvin | Method of providing proper vertebral spacing |
| US8992621B2 (en) | 1996-09-13 | 2015-03-31 | Liliane Attali | Expandable osteosynthesis cage |
| US9351852B2 (en) | 2002-05-23 | 2016-05-31 | Pioneer Surgical Technology, Inc. | Artificial disc device |
| JP2007530093A (en) * | 2003-07-17 | 2007-11-01 | ネクスジェン スパイン、インク． | Intervertebral disc prosthesis |
| US7896918B2 (en) | 2003-08-12 | 2011-03-01 | Biedermann Motech Gmbh | Space holder for vertebrae or intervertebral discs |
| US8551174B2 (en) | 2003-08-12 | 2013-10-08 | Biedermann Technologies Gmbh & Co. Kg | Space holder for vertebrae or intervertebral discs |
| US9078762B2 (en) | 2003-08-12 | 2015-07-14 | Biedermann Technologies Gmbh & Co. Kg | Space holder for vertebrae or intervertebral discs |
| DE10337088A1 (en) * | 2003-08-12 | 2005-03-10 | Biedermann Motech Gmbh | Placeholder for vertebral bodies or intervertebral discs |
| US9445916B2 (en) | 2003-10-22 | 2016-09-20 | Pioneer Surgical Technology, Inc. | Joint arthroplasty devices having articulating members |
| JP2007275545A (en) * | 2006-04-04 | 2007-10-25 | Rnp Korea Co Ltd | Vertebral arch spacer for dilation operation of vertebral canal of cervical vertebra body |
| US9233011B2 (en) | 2006-09-15 | 2016-01-12 | Pioneer Surgical Technology, Inc. | Systems and apparatuses for inserting an implant in intervertebral space |
| US9693872B2 (en) | 2006-09-15 | 2017-07-04 | Pioneer Surgical Technology, Inc. | Intervertebral disc implant |
| US10080667B2 (en) | 2006-09-15 | 2018-09-25 | Pioneer Surgical Technology, Inc. | Intervertebral disc implant |
| JP2010281742A (en) * | 2009-06-05 | 2010-12-16 | Nihon Univ | Intervertebral disk hardness measuring device |
| US9314348B2 (en) | 2014-06-04 | 2016-04-19 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US9707095B2 (en) | 2014-06-04 | 2017-07-18 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US10098756B2 (en) | 2014-06-04 | 2018-10-16 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US10945857B2 (en) | 2014-06-04 | 2021-03-16 | Wenzel Spine, Inc. | Bilaterally expanding intervertebral body fusion device |
| US9408714B1 (en) | 2015-06-12 | 2016-08-09 | Amendia, Inc. | Artificial disc |
| US11147682B2 (en) | 2017-09-08 | 2021-10-19 | Pioneer Surgical Technology, Inc. | Intervertebral implants, instruments, and methods |
| USD907771S1 (en) | 2017-10-09 | 2021-01-12 | Pioneer Surgical Technology, Inc. | Intervertebral implant |
| USD968613S1 (en) | 2017-10-09 | 2022-11-01 | Pioneer Surgical Technology, Inc. | Intervertebral implant |
| US11219531B2 (en) | 2019-04-10 | 2022-01-11 | Wenzel Spine, Inc. | Rotatable intervertebral spacing implant |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH084606B2 (en) | 1996-01-24 |
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