JP4202918B2 - 復元力供給部材としてスロット付きベルビルワッシャを備えた人工椎間板 - Google Patents
復元力供給部材としてスロット付きベルビルワッシャを備えた人工椎間板 Download PDFInfo
- Publication number
- JP4202918B2 JP4202918B2 JP2003531935A JP2003531935A JP4202918B2 JP 4202918 B2 JP4202918 B2 JP 4202918B2 JP 2003531935 A JP2003531935 A JP 2003531935A JP 2003531935 A JP2003531935 A JP 2003531935A JP 4202918 B2 JP4202918 B2 JP 4202918B2
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- Prior art keywords
- plate member
- replacement device
- plate
- ball
- disc replacement
- 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.)
- Expired - Fee Related
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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
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- A61F2/442—Intervertebral or spinal discs, e.g. resilient
- A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
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- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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-
- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
- A61F2250/0006—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting angular orientation
-
- 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
- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
-
- 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
-
- A—HUMAN NECESSITIES
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- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- 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
- A61F2310/00365—Proteins; Polypeptides; Degradation products thereof
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (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)
Description
れにより、メッシュを有したプレートは、他の人工椎間板製品と比較して、初期的埋設時の把持強度および保持強度という点において実質的に優位なものとなる。凸状メッシュは、さらに、究極的にはこのメッシュを通して骨組織を成長させ得るような骨結合性表面を提供する。このメッシュは、好ましくは、チタンから形成される。しかしながら、メッシュは、他の金属からおよび/または非金属から、形成することもできる。メッシュがドーム形状であることにより、メッシュは、人工椎間板を埋設し得る角度を制限しない。ここではフレキシブルドームが好ましくはワイヤメッシュであるとして説明されているけれども、非金属材料および/または他の金属材料からなるフレキシブル部材も含めた他のメッシュ部材や中実フレキシブル部材を使用することもできることは、理解されるであろう。また、フレキシブルさや撓み性や変形性は、フレキシブル材料によってもたらされる必要はなく、これに代えてあるいはこれに加えて、機械的にもたらすことも、また、他の手段によってもたらすことも、できる。
100b 下側プレート
103a 内表面
103b 内表面
130 ベルビルワッシャ(復元力供給部材)
131 スロット
200 下側プレート
203 内面
204 ポスト部材
205 位置決めネジ(撓み防止部材)
207 ボール形状ヘッド(球形突起)
209 中心軸穴
230 ベルビルワッシャ
232 中央開口
233 湾曲容積(湾曲ソケット)
300 上側プレート
302 外表面
304 多孔性コーティング
306 周縁スカート(保持壁)
310 保持リング
330a ベルビルワッシャ
330b ベルビルワッシャ
332a 内側エッジ
332b 内側エッジ
334a 外側エッジ
334b 外側エッジ
336a 湾曲容積
336b 湾曲容積
338a 螺旋スロット
338b 螺旋スロット
400 下側プレート
402 外表面
404 多孔性コーティング
406 ポスト部材
410 ボール形状ヘッド(半球形突起)
412 径方向スロット
414 軸方向穴
416 位置決めネジ(撓み防止部材)
500a 下側プレート
500b 上側プレート
502a 円形凹所
502b ボール形状突起
504a 内面
504b 内面
506a 凸状メッシュ
506b 凸状メッシュ
508a 外表面
508b 外表面
516a リベット(撓み防止部材)
518a シールド(保持部材)
520b スロット(径方向スロット)
522b 軸穴
524b リベット(撓み防止部材)
600 ベルビルワッシャ
633 湾曲ソケット
638 螺旋スロット
Claims (21)
- 椎間板代替デバイスであって、
第1プレート部材および第2プレート部材であるとともに、各プレート部材が、互いに離間している第1表面と第2表面とを有し、第1プレート部材の第1表面と第2プレート部材の第1表面とが、互いに対向しており、第1プレート部材の第2表面と第2プレート部材の第2表面とが、背骨内の隣接椎骨の各係合対象面に対する係合のために、互いに反対側を向いており、第2プレート部材の第1表面には、内向きに突出した環状保持壁が設けられているような、第1プレート部材および第2プレート部材と;
前記第1プレート部材の第1表面に設けられかつ少なくとも部分的にボール形状を有したボール形状ヘッドと;
外側端と内側端とを有した凸状ハウジング部材であるとともに、内側端には湾曲容積が設けられており、この湾曲容積は、前記ボール形状ヘッドに対して係合し得るとともにこのボール形状ヘッドと一緒に関節結合を形成し得るようなサイズおよび形状とされた内表面を有し、外側端は、前記第2プレート部材の前記第1表面に対して延在しているような、凸状ハウジング部材と;
この凸状ハウジング部材および前記第2プレート部材の前記環状保持壁と協働することによって、前記第2プレート部材の前記第1表面に対しての前記凸状ハウジング部材の前記外側端の動きを抑制するよう機能する、環状リングと;
を具備し、
前記環状リングが、前記外側端と前記内側端との間において、前記凸状ハウジング部材と協働することを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
さらに、前記第2プレート部材の前記第1表面から垂下されているとともに前記内向き環状保持壁を有している環状スカートを具備していることを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
前記内向き環状保持壁が、少なくとも1つのノッチを形成し、
このノッチ内において、前記環状リングが、前記第2プレート部材の前記第1表面に対しての前記凸状ハウジング部材の前記外側端の動きを抑制するよう機能するものとされていることを特徴とする椎間板代替デバイス。 - 請求項3記載の椎間板代替デバイスにおいて、
前記ノッチが、前記ボール形状ヘッドに対して同軸的に配置された環状ノッチであることを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
前記環状リングの少なくとも一部が、前記内向き環状保持壁から前記ボール形状ヘッドに向けて径方向内向きに延在していることを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
前記内向き環状保持壁と、前記環状リングと、前記凸状ハウジング部材とが、中心軸に対して同軸的に配置されていることを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
さらに、前記第1プレート部材および前記第2プレート部材の少なくとも一方の前記第2表面に設けられた端面係合部材を具備し、
この端面係合部材が、背骨内の隣接椎骨の係合対象面に対する係合を補助し得るよう機能することを特徴とする椎間板代替デバイス。 - 請求項7記載の椎間板代替デバイスにおいて、
前記端面係合部材が、
隣接椎骨の係合対象面がなす凹状表面に接触し得るような凸形状を有しつつ前記第2表面から膨出した凸形状表面と;
解剖学的負荷の存在下において隣接椎骨の係合対象面に対して固定的に係合し得るよう機能する変形可能かつ再成形可能な部材と;
隣接椎骨の係合対象面に対して固定的に係合し得るよう、解剖学的負荷の存在下において隣接椎骨の係合対象面に対して適合的に変形し得るような変形可能かつ再成形可能な部材と;
隣接椎骨の係合対象面に対して係合し得るよう前記第2表面から膨出する向きに付勢された椎骨接触面を有した椎骨接触部材であるとともに、前記椎骨接触面の少なくとも一部が、前記付勢力に打ち勝った負荷によって前記第2表面に向けて移動可能とされているような、椎骨接触部材と;
メッシュと;
の中の少なくとも1つを備えていることを特徴とする椎間板代替デバイス。 - 請求項8記載の椎間板代替デバイスにおいて、
前記メッシュが、
(i) 前記第2表面から凸状に膨出するドーム形状をなす静止形状を有しているか;
(ii)前記第2表面に対してレーザー溶接されているか;
(iii) チタンを含有しているか;
のいずれかとされていることを特徴とする椎間板代替デバイス。 - 請求項8記載の椎間板代替デバイスにおいて、
(i) 前記メッシュに隣接して骨結合特性部材が配置されているか;
(ii)骨結合特性部材が、前記第2表面上に多孔性表面を有しているか;
(iii) 骨結合特性部材が、ワイヤメッシュとされたメッシュを有しているか;
のいずれかとされていることを特徴とする椎間板代替デバイス。 - 請求項1記載の椎間板代替デバイスにおいて、
前記凸状ハウジング部材が、前記第1プレート部材および前記第2プレート部材の外表面に対して印加された圧縮性負荷を緩衝し得るような復元力をもたらすことを特徴とする椎間板代替デバイス。 - 請求項11記載の椎間板代替デバイスにおいて、
前記凸状ハウジング部材が、ベルビルワッシャとされていることを特徴とする椎間板代替デバイス。 - 請求項12記載の椎間板代替デバイスにおいて、
前記ベルビルワッシャが、互いに離間した複数の螺旋スロットを備え、
各スロットが、前記ベルビルワッシャの周縁エッジ上の地点から、前記周縁エッジから径方向内側の地点までにわたって、延在していることを特徴とする椎間板代替デバイス。 - 請求項12記載の椎間板代替デバイスにおいて、
前記ベルビルワッシャが、径方向において変化する厚さを有し、その場合、
(i) 径方向において変化する厚さが、内側端における厚さの方が、外側端における厚さよりも、厚いものとされているか;
(ii)径方向において変化する厚さが、外側端における厚さの方が、内側端における厚さよりも、厚いものとされているか;
のいずれかとされていることを特徴とする椎間板代替デバイス。 - 椎間板代替デバイスであって、
第1プレート部材および第2プレート部材であるとともに、各プレート部材が、互いに離間している第1表面と第2表面とを有し、第1プレート部材の第1表面と第2プレート部材の第1表面とが、互いに対向しており、第1プレート部材の第2表面と第2プレート部材の第2表面とが、背骨内の隣接椎骨の各係合対象面に対する係合のために、互いに反対側を向いており、第2プレート部材の第1表面には、結合部材が設けられているような、第1プレート部材および第2プレート部材と;
前記第1プレート部材の第1表面に設けられかつ少なくとも部分的にボール形状を有したボール形状ヘッドと;
外側端と内側端とを有した凸状ハウジング部材であるとともに、内側端には湾曲容積が設けられており、この湾曲容積は、前記ボール形状ヘッドに対して係合し得るとともにこのボール形状ヘッドと一緒に関節結合を形成し得るようなサイズおよび形状とされた内表面を有し、外側端は、前記第2プレート部材の前記第1表面に対して延在しているような、凸状ハウジング部材と;
を具備し、
前記結合部材が、
(i) 前記凸状ハウジング部材と前記ボール形状ヘッドとの係合によって、前記第1プレート部材と前記第2プレート部材とに対して引っ張り力が印加された時にでもこれら第1および第2プレート部材どうしを分離させ得ないようにして、なおかつ、
(ii)前記第1プレート部材と前記第2プレート部材とに対して圧縮負荷が印加された時にでも前記ボール形状ヘッドから前記凸状ハウジング部材の内表面を実質的に分離させ得ないようにして、
前記凸状ハウジング部材に対して係合しており、
前記結合部材が、前記外側端と前記内側端との間において前記凸状ハウジング部材と協働することによって、引っ張り負荷が印加された時と圧縮負荷が印加された時とのいずれにおいても、前記第2プレート部材の前記第1表面に対しての前記凸状ハウジング部材の前記外側端の動きを所定に維持する、環状リングを備えていることを特徴とする椎間板代替デバイス。 - 請求項15記載の椎間板代替デバイスにおいて、
前記結合部材が、前記第2プレート部材の前記第1表面に設けられた内向きに突出した環状保持壁を備えていることを特徴とする椎間板代替デバイス。 - 請求項15記載の椎間板代替デバイスにおいて、
前記結合部材が、第1結合部材とされ、
前記ボール形状ヘッドが、前記第1プレート部材および前記第2プレート部材が引っ張り力を受けた時にこれら第1および第2プレート部材どうしの分離を防止することを補助し得るよう動作する第2結合部材を受領するための軸穴を備えていることを特徴とする椎間板代替デバイス。 - 請求項17記載の椎間板代替デバイスにおいて、
前記ボール形状ヘッドが、このボール形状ヘッドに対して径方向内向き力が印加された時に、径方向に撓むことを可能とし得るよう動作する少なくとも1つの径方向スロットを備え、
前記凸状ハウジング部材が、前記湾曲容積を形成することとなる開口を備え、
前記ボール形状ヘッドが、このボール形状ヘッドが径方向に撓んだ時に、前記開口を通して通過移動し得るものとされ、
前記ボール形状ヘッドの径方向の前記撓みと、前記開口を通しての前記ボール形状ヘッドの前記通過移動とが、前記軸穴内に前記第2結合部材を係合した後には、禁止されるようになっていることを特徴とする椎間板代替デバイス。 - 請求項18記載の椎間板代替デバイスにおいて、
前記第2結合部材が、前記軸穴に対して係合し得るよう、前記第2プレート部材内の開口を通して挿入されることを特徴とする椎間板代替デバイス。 - 請求項17記載の椎間板代替デバイスにおいて、
前記第2結合部材が、前記軸穴に対して係合し得るよう、前記凸状ハウジング部材の前記内側端内の開口を通して挿入されることを特徴とする椎間板代替デバイス。 - 椎間板代替デバイスであって、
第1プレート部材および第2プレート部材であるとともに、各プレート部材が、外面と内面とを備え、前記第1および第2プレート部材は、前記内面どうしが互いに対向しておりかつ前記外面どうしが互いに反対側を向いているようにして、互いに離間した位置関係でもって配置され、第1プレート部材の前記内面には、この内面から起立する中央ポスト構造が設けられ、このポスト構造が、第2プレート部材に向けて内方へと延出されたボール形状ヘッドを有しているような、第1プレート部材および第2プレート部材と;
外側端が前記第2プレート部材の前記内面に対して対向するようにして前記第1および第2プレート部材の各内面どうしの間に配置される少なくとも1つの凸状ハウジング部材であるとともに、内側端のところに湾曲容積が設けられているような、少なくとも1つの凸状ハウジング部材と;
を具備し、
前記ボール形状ヘッドの中心回りに前記ボール形状ヘッドが前記湾曲容積内において回転可能かつ傾斜可能であるようにして、前記湾曲容積内に捕捉され、
前記第2プレート部材の前記内面が、この内面に沿っての前記凸状ハウジング部材の前記外側端の移動を制限し得るような壁を備え、
前記凸状ハウジング部材の前記外側端が、前記壁に隣接して配置され、
前記第2プレート部材の前記内面に沿っての前記移動が、前記外側端と前記壁との間の干渉によって制限されるようになっており、
前記第2プレート部材の前記内面が、さらに、この内面から離間する向きにおける前記凸状ハウジング部材の前記外側端の移動を制限するためのリングを備え、
前記リングが、前記外側端と前記内側端との間において前記凸状ハウジング部材と協働するものとされ、
前記第2プレート部材の前記内面から離間する向きの前記移動が、前記外側端と前記リングとの間の干渉によって制限されるようになっていることを特徴とする椎間板代替デバイス。
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US09/968,045 US6740117B2 (en) | 2001-02-15 | 2001-10-01 | Intervertebral spacer device having a radially thinning slotted belleville spring |
PCT/US2002/019660 WO2003028595A1 (en) | 2001-10-01 | 2002-06-19 | Artificial intervertebral disc having a slotted belleville washer force restoring element |
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JP2005503890A JP2005503890A (ja) | 2005-02-10 |
JP2005503890A5 JP2005503890A5 (ja) | 2005-12-08 |
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US (4) | US6740117B2 (ja) |
EP (3) | EP2319465B1 (ja) |
JP (1) | JP4202918B2 (ja) |
AT (1) | ATE462381T1 (ja) |
AU (1) | AU2002316316B2 (ja) |
CA (1) | CA2461791C (ja) |
DE (1) | DE60235824D1 (ja) |
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- 2002-06-19 EP EP10178946A patent/EP2319465B1/en not_active Expired - Lifetime
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CA2461791C (en) | 2008-05-27 |
CA2461791A1 (en) | 2003-04-10 |
IL161136A (en) | 2010-05-31 |
EP1437988A1 (en) | 2004-07-21 |
US20040204764A1 (en) | 2004-10-14 |
DE60235824D1 (de) | 2010-05-12 |
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US6918934B2 (en) | 2005-07-19 |
ATE462381T1 (de) | 2010-04-15 |
EP2177180A1 (en) | 2010-04-21 |
EP2319465B1 (en) | 2012-07-11 |
US20030065395A1 (en) | 2003-04-03 |
WO2003028595A1 (en) | 2003-04-10 |
IL161136A0 (en) | 2004-08-31 |
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