TWI413515B - 椎間盤彌補器 - Google Patents
椎間盤彌補器 Download PDFInfo
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- TWI413515B TWI413515B TW097127719A TW97127719A TWI413515B TW I413515 B TWI413515 B TW I413515B TW 097127719 A TW097127719 A TW 097127719A TW 97127719 A TW97127719 A TW 97127719A TW I413515 B TWI413515 B TW I413515B
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- intervertebral disc
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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
-
- 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
- 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
- A61F2/30721—Accessories
- A61F2/30742—Bellows or hose-like seals; Sealing membranes
-
- 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
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30092—Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol
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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
- A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
-
- 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
- A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
-
- 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
- A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
- A61F2002/30571—Leaf springs
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0014—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
-
- 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
- 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
- A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
-
- 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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Heart & Thoracic Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Cardiology (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)
- Surgical Instruments (AREA)
Description
本發明係關於一種椎間盤彌補器,有基板、與基板對立之頂板、延伸貫穿基板和頂板中心之中心軸線,以及各具有環形段和二自由端之補數彈簧,配置在包圍中心軸線,其中自由端分別連接基板和頂板,又其中環形段係指向背離彌補器之中心軸線。
例如從US 4,309,777號已知一種椎間盤彌補器,使用金屬彈簧,配置在基板和頂板之間。此種人工椎間盤包括上盤部和下盤部,有複數蝸形彈簧,從上盤部延伸至下盤部,可屈服性逼使盤部彼此分離。
US 6,770,094 B2號記載一種椎間盤彌補器,包括頭盤和尾盤,在被盤簧壓縮時,彼此彈性相偎支持。彈簧為記憶金屬合金組成,在體溫時顯示超彈性之性能。在一具體例中,彈簧係由葉片彈簧形成,呈長條形狀,其一端安裝於上盤,而另一端安裝於下盤。
US 7,201,776 B2號揭示一種人工盤替代品(ADR),包含一對相對立的端板組件,各附設於上、下椎骨之一,有一緩衝組件,介置於端板組件之間;以及充填材料,含於緩衝組件內。在一具體例中,緩衝組件係輪胎狀組件,與裝置中心的金屬轂合作,輪胎內保持空氣、液體、凝膠或其他材料。
商業化的椎間盤彌補器,有一或若干缺點,諸如無軸向阻尼、無轉動控制、不恢復所有自由度,以及較自然椎間盤過份之運動範圍(ROM)。
本發明之目的,在於提供一種椎間盤彌補器,具有改進軸向阻尼,加上轉動控制和屈曲/延伸控制。
此目的是由申請專利範圍第1項之椎間盤彌補器達成。進一步發展列於申請專利範圍附屬項。
本發明椎間盤彌補器達成高度軸向阻尼,利用環形彈簧,其環形部指向背離中心軸線。由於彈簧以其自由端分別連接基板和頂板,可達成轉動控制。屈曲/延伸之運動範圍(ROM)減少大約±5∘,保護周圍關節,尤其是小平面關即。
末端止動部宜由彈料性材料製成,額外限制和阻尼軸向運動。
屈曲性保護軸套防止血管和組織成長進入彈簧間之空間內。
本發明其他特點和優點,凡精於此道之士從以下就本發明具體例參照附圖所述,即可明白。須知本發明可有其他不同的具體例,其細節亦可在諸方面加以修飾。因此,附圖和說明,只視為參考性質,並非僅限於此。
由第1至4圖可見,椎間盤彌補器包括基板1,和基板1對立之頂板2。基板1和頂板2各有板部1a,2a和中央圓筒形凸部1b,2b。基板1和頂板2的配置,使圓筒形凸部1b,2b彼此面對。中心軸線M延伸穿過凸部1b,2b的中心。螺紋腔孔11延伸貫穿與圓筒形凸部1b,2b共軸的基板1和頂板2。板部1a,2a在具體例內呈圓形,但可有任意其他形狀,尤其是適合相鄰椎骨端板輪廓之形狀。板部1a,2a稍微向外彎曲,各板部包括複數齒3,供固定於相鄰椎骨之端板。
基板1和頂板2係生理相容性材料製成,諸如鈦或不銹鋼,或生理相容性塑膠材料,諸如聚芳基醚醚酮(PEEK)。
複數彈簧4配置在基板1和頂部2之間。詳見第3圖,各彈簧4呈實質上平坦長條形狀,類似葉片彈簧,並包括二自由端段5a,5b,和自由端段5a,5b中間之環形彎段6。在較
佳具體例中,彈簧為葉片彈簧。
自由端段5a,5b係筆直平坦段,詳見第1圖。形成彈簧4的長條寬度使複數,例如六個彈簧,可配置包圍中心軸線M,相鄰彈簧間有空間。環形段6最外部份的寬度w最大,朝自由端段5a,5b遞減,見第3圖。彈簧4從自由端段5a,5b至環形段6最外部份之長度l是,當彈簧安裝於環形段6時,完全位在板部1a,2a之間。環形段6沿彌補器中心軸線M平行方向之最大直徑,使得在第1和2圖所示安裝狀態時,於彈簧4和基板1及頂板2之間有距離。
彈簧4可由任何高度屈曲性生理相容性材料製成。例如,彈簧可由顯示超彈性的形狀記憶性材料製成,尤指形狀記憶體金屬,諸如鎳鈦合金,此合金之特例為鎳鈦諾(Nitinol)。
由第1、3、5圖可見,安裝螺釘7係供彈簧安裝於基板1和頂板2間之用。各安裝螺釘7包括有螺紋的螺釘段8及其自由端之凹部9,供旋入工具結合之用。安裝螺釘7自由端對面,包括盤形部10,其直徑相當於圓筒形凸部1b,2b的直徑。各螺釘段8與分別延伸貫穿基板1及其圓筒形凸部1b和貫穿頂板2及其圓筒形凸部2b的共軸螺紋腔孔11結合。螺釘段的長度使得安裝螺釘7分別連接於基板1和頂板2,而彈簧4被盤形部10及圓筒形凸部1b,2b夾持時,凹部9可與旋入工具結合。安裝螺釘7係由類似基板和頂板的生理相容性材料製成。
在安裝螺釘7的盤形部10之間,設有阻尼元件12。阻尼元件以盤形為佳,更好是彈料性材料製成,諸如聚碳酸酯胺酯(PCU)。選用碟形厚度使其充滿安裝螺釘7間之空間。選用材料以達成所需阻尼效應。
在第1-4圖中可見,設有保護軸套13,沿周圍繞彈簧4,並從基板1延伸至頂板2。軸套13在徑向部份包圍彈簧4
之環形段6。因此,環形段6不與基板1和頂板2的板部1a,2a直接接觸。如此導致進一步軸向阻尼。保護軸套13是屈曲性材料製成,尤其是可用彈料性材料製造,諸如聚碳酸酯胺酯(PCU)。
椎間盤彌補器經預組裝,其方式是把彈簧4夾在安裝螺釘7的盤形部10和基部1及頂部2的圓筒形凸部1b,2b之間。阻尼元件12可固定於安裝螺釘的盤形部10之自由側,例如以粘著方式。當全部彈簧夾持時,安裝保護軸套。
使用時,把椎間盤彌補器***二相鄰椎骨之間,以取代椎間盤。基板和頂板外表面之齒部3,結合入相鄰椎骨之端板內。於脊椎屈曲和延伸之際,即對一或若干彈簧施壓或釋壓,加以壓縮或延伸。同時,阻尼元件12阻尼純軸向運動。彈簧4亦提供轉動控制,因為自由端段5a,5b固定,當基板和頂板發生彼此相對扭動時,造成環形段6扭曲至某一程度。
彈簧的彈性和彈簧形狀在屈曲/延伸中限制運動範圍(ROM)至大約±5∘,以保護相鄰結構,諸如小平面關節和韌帶不致超過負荷。實質軸向阻尼(與天然椎間盤相似),限制軸向壓力至生理範圍,並容許人工盤和小平面關節(「鎖定小平面」)之彈性互動。
可以修改。基板和頂部形狀在解剖學上可更為適應椎骨的端板。因此,可呈腎臟形或橢圓形,或其他形狀。齒部可呈圖示以外的形狀。例如,齒部可呈釘形或不對稱形狀。再者,基板1和頂板2的外表面可粗糙化或加塗,以改進生長入端板內。
彈簧的安裝可直接旋入基板1或頂板2的凸部1b,2b,代替夾持。
阻尼元件12可以其他方式實施,例如用水凝膠墊材,或其他類彈簧,諸如蝸形彈簧或盤式彈簧。
阻尼元件12亦可省略,雖然會減少軸向阻尼的優點。此外,保護軸套可以省略。
1‧‧‧基板
2‧‧‧頂板
1a,2a‧‧‧板部
1b,2b‧‧‧圓筒形凸部
3‧‧‧齒部
4‧‧‧彈簧
5a,5b‧‧‧自由端段
6‧‧‧環形段
7‧‧‧安裝螺釘
8‧‧‧螺釘段
9‧‧‧自由端凹部
10‧‧‧盤形部
11‧‧‧螺紋腔孔
12‧‧‧阻尼元件
13‧‧‧軸套
M‧‧‧中心軸線
w‧‧‧環形段最外部份的寬度
l‧‧‧環形段最外部份的長度
第1圖為本發明椎間盤彌補器具體例之斷面圖;第2圖為第1圖椎間盤彌補器部份斷面之透視側視圖;第3圖為椎間盤彌補器之透視分解圖;第4圖為椎間盤彌補器之透視側視圖;第5圖為用來把彈簧夾持於頂板之椎間盤一部份。
1‧‧‧基板
2‧‧‧頂板
1a,2a‧‧‧板部
1b,2b‧‧‧圓筒形凸部
3‧‧‧齒部
4‧‧‧彈簧
5a,5b‧‧‧自由端段
6‧‧‧環形段
7‧‧‧安裝螺釘
11‧‧‧螺紋腔孔
13‧‧‧軸套
M‧‧‧中心軸線
Claims (11)
- 一種椎間盤彌補器,包括:基板(1);頂板(2),其中心軸線(M)延伸貫穿基板和頂板的中心;至少二彈簧(4),配置在基板和頂板之間,彈簧各有環形段(6)和自由端段(5a,5b);其中自由端之一(5a)連接至基板,另一自由端(5b)連接至頂板;其中環形段在徑向指向背離中心軸線;而且環形段(6)在中心軸線(M)平行方向之最大直徑(d),使彌補器在安裝狀態時,環形段(6)與基板(1)和頂板(2)有一段距離者。
- 如申請專利範圍第1項之椎間盤彌補器,其中彈簧(4)係實質上平坦長條者。
- 如申請專利範圍第1項之椎間盤彌補器,其中設有夾持裝置(7),把自由端段(5a,5b)夾持於基板(1)和頂板(2)者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中基板(1)和頂板(2)各有凸部(1b,2b),與中心軸線共軸,凸部彼此面對者。
- 如申請專利範圍第4項之椎間盤彌補器,其中彈簧之自由端段(5a,5b),夾持於凸部(1b,2b)者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中夾持元件(12)配置在基板和頂板之間,夾持元件以彈料為佳者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中設有複數環形彈簧(4),在中心軸線(M)周圍呈圓形配置者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中彈簧(4)係由顯示超彈性之材料製成,以鎳鈦等形狀記憶性合金為佳者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中屈曲性保護軸套(13)係配置在基板和頂板之間者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中基板和頂板在彈簧(4)相反側,包括結合結構(3),可與椎骨的相鄰端板結合者。
- 如申請專利範圍第1至3項之一項椎間盤彌補器,其中自由端係鄰接環形段者。
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US95220107P | 2007-07-26 | 2007-07-26 | |
EP07014709A EP2018832B1 (en) | 2007-07-26 | 2007-07-26 | Intervertebral disc prosthesis |
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TWI413515B true TWI413515B (zh) | 2013-11-01 |
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US (1) | US20090076613A1 (zh) |
EP (1) | EP2018832B1 (zh) |
JP (1) | JP5553974B2 (zh) |
KR (1) | KR101421684B1 (zh) |
CN (1) | CN101352377B (zh) |
ES (1) | ES2373980T3 (zh) |
TW (1) | TWI413515B (zh) |
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US20090076613A1 (en) | 2009-03-19 |
JP5553974B2 (ja) | 2014-07-23 |
EP2018832A1 (en) | 2009-01-28 |
CN101352377B (zh) | 2013-10-16 |
KR20090012097A (ko) | 2009-02-02 |
TW200904388A (en) | 2009-02-01 |
EP2018832B1 (en) | 2011-09-21 |
KR101421684B1 (ko) | 2014-07-22 |
JP2009028536A (ja) | 2009-02-12 |
ES2373980T3 (es) | 2012-02-10 |
CN101352377A (zh) | 2009-01-28 |
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