DE10361957B4 - cervical spine implant - Google Patents
cervical spine implant Download PDFInfo
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- DE10361957B4 DE10361957B4 DE2003161957 DE10361957A DE10361957B4 DE 10361957 B4 DE10361957 B4 DE 10361957B4 DE 2003161957 DE2003161957 DE 2003161957 DE 10361957 A DE10361957 A DE 10361957A DE 10361957 B4 DE10361957 B4 DE 10361957B4
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- implant
- implant part
- cervical spine
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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
- A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
-
- 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
- A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
-
- 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
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
-
- 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
- A61F2002/30108—Shapes
- A61F2002/30199—Three-dimensional shapes
- A61F2002/30299—Three-dimensional shapes umbrella-shaped or mushroom-shaped
-
- 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
- A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
- A61F2002/30649—Ball-and-socket joints
-
- 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
- A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
- A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
- A61F2002/30685—Means for reducing or preventing the generation of wear particulates
-
- 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
- A61F2/3094—Designing or manufacturing processes
- A61F2002/30968—Sintering
-
- 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
- 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
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
- A61F2230/0015—Kidney-shaped, e.g. bean-shaped
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0093—Umbrella-shaped, e.g. mushroom-shaped
-
- 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
- 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
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
-
- 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
-
- 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
- A61F2310/00179—Ceramics or ceramic-like structures
-
- 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
- A61F2310/00329—Glasses, e.g. bioglass
-
- 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
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00928—Coating or prosthesis-covering structure made of glass or of glass-containing compounds, e.g. of bioglass
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- 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)
Abstract
Halswirbelsäulenimplantat
zum Einsatz zwischen zwei benachbarten Halswirbelkörpern, aufweisend
ein in einem Halswirbelkörper
zu implantierenden ersten Implantatteil (2) und ein in dem benachbarten
Halswirbelkörper
zu implantierenden zweiten Implantatteil (3), bei dem
– das erste
Implantatteil (2) rückseitig
eine plane Auflagefläche
für den
Knochen aufweist, die zumindest teilweise mit einer dreidimensionalen
offenmaschigen Raumnetzstruktur (4) versehen ist, und vorderseitig
eine gewölbte Oberfläche (7)
aufweist,
– das
zweite Implantatteil (3) rückseitig
ebenfalls eine plane Auflagefläche
für den
Knochen aufweist, die zumindest teilweise mit einer dreidimensionalen
offenmaschigen Raumnetzstruktur (4') versehen ist, und vorderseitig
eine der Wölbung
der Oberfläche
(7) des ersten Implantatteils (2) entsprechend konkave Oberfläche (8)
aufweist, wobei beide Oberflächen
(7, 8) nach Art eines Gelenkes zusammenwirken, derart, dass sie
zueinander Bewegungen mit mediallateralen und dorsal-ventralen Komponenten
ausführen können, dadurch
gekennzeichnet, dass in die gewölbte Oberfläche (7)
des ersten Implantatteils (2) ein gewölbtes Einlegeteil (5) als Gleitpartner
für die
konkave Oberfläche...Cervical spine implant for use between two adjacent cervical vertebrae, comprising a first implant part (2) to be implanted in a cervical vertebra and a second implant part (3) to be implanted in the adjacent cervical vertebra
The first implant part (2) has on the back a planar bearing surface for the bone which is at least partially provided with a three-dimensional open-mesh spatial network structure (4) and has an arched surface (7) on the front side,
- The second implant part (3) on the back also has a flat bearing surface for the bone, which is at least partially provided with a three-dimensional open-mesh spatial network structure (4 '), and on the front side of the curvature of the surface (7) of the first implant part (2) corresponding concave Surface (8), wherein both surfaces (7, 8) interact in the manner of a joint, such that they can perform mutually movements with mediallateral and dorsal-ventral components, characterized in that in the curved surface (7) of the first implant part (2) a curved insert (5) as a sliding partner for the concave surface ...
Description
Die vorliegende Erfindung betrifft ein Halswirbelsäulenimplantat.The The present invention relates to a cervical spine implant.
Derartige Implantate sind bekannt und im Einsatz. Problematisch bei diesen Implantaten ist die eingeschränkte Beweglichkeit der Halswirbelsäule nach der Implantation. Weitgehend natürliche Bewegungen wie mit dem Kopf nicken oder den Kopf schütteln sind oftmals nur eingeschränkt möglich. Je größer die Beweglichkeit des Implantates ist, desto stabiler muss die Sekundärfixation des Implantates sein, um die auftretenden Kräfte abfangen zu können. Hier zeigen bekannte Implantate deutliche Defizite.such Implants are known and in use. Problematic with these Implants is the limited Mobility of the cervical spine after implantation. Largely natural Movements like nodding your head or shaking your head often only limited possible. The bigger the The flexibility of the implant is, the more stable the secondary fixation of the implant to be able to absorb the forces occurring. Here show known implants significant deficits.
Ein Wirbelkörperimplantat gemäß der WO 00/53127 A1 setzt sich aus drei Teilen zusammen, nämlich einem ersten (kranialen) Implantatteil, einem zweiten (kaudalen) Implantatteil sowie einem zwischen diesen beiden Implantatteilen eingebrachten Meniskusteil. Dieser Meniskusteil ist zwischen den beiden anderen Implantatteilen frei verschieblich. Seine aktuelle Lage stellt sich anhand des momentanen Belastungszustandes der Wirbelsäule ein. Dieses Prinzip ist im Halswirbelbereich verantwortungsbewusst nicht einsetzbar, da die Gefahr besteht, dass das Meniskusteil sich aus seiner Lage zwischen den beiden anderen Implantatteilen löst.One Vertebral body implant according to WO 00/53127 A1 is composed of three parts, namely a first (cranial) Implant part, a second (caudal) implant part and a inserted between these two implant parts Meniskusteil. This meniscus part is between the other two implant parts freely movable. His current situation is based on the current Stress condition of the spine one. This principle is responsible for cervical vertebrae can not be used, since there is a risk that the meniscus part itself from its position between the other two implant parts triggers.
Vor diesem Hintergrund ist es die Aufgabe der vorliegenden Erfindung, ein Halswirbelsäulenimplantat anzugeben, das bei einer sicheren Verankerung die größtmögliche Bewegungsfreiheit zulässt.In front In this context, it is the object of the present invention a cervical spine implant indicate the greatest possible freedom of movement with a secure anchoring allows.
Gelöst wird diese Aufgabe durch ein Halswirbelsäulenimplantat mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen sind in den Unteransprüchen angegeben.Is solved this task by a cervical spine implant with the features of claim 1. Advantageous developments are specified in the subclaims.
Das erfindungsgemäße Halswirbelsäuleimplantat weist auf ein in einem Halswirbelkörper zu implantierenden erstes Implantatteil und ein in den benachbarten Halswirbelkörper zu implantierenden zweites Implantatteil. Das erste Implantatteil weist rückseitig eine plane Auflagefläche für den Knochen auf, die zumindest teilweise mit einer dreidimensionalen offenmaschigen Raumnetzstruktur versehen ist, sowie vorderseitig eine gewölbte Oberfläche. Das zweite Implantatteil weist rückseitig ebenfalls eine plane Auflagefläche für den Knochen auf, die zumindest teilweise mit einer dreidimensionalen offenmaschigen Raumnetzstruktur versehen ist, und vorderseitig eine der Wölbung der Oberfläche des ersten Implantatteils entsprechend konkave Oberfläche. Beide Oberflächen der Implantatteile wirken nach Art eines Gelenkes zusammen, und zwar derart, dass sie zueinander Bewegungen mit medial-lateralen und dorsal-ventralen Komponenten ausführen können.The cervical spine implant according to the invention indicates a first to be implanted in a cervical vertebra Implant part and one in the adjacent cervical vertebrae too implanting second implant part. The first implant part has the back a flat bearing surface for the Bone on, at least partially, with a three-dimensional open mesh network structure is provided, as well as front side a domed one Surface. The second implant part has the back also a flat bearing surface for the Bone on, at least partially, with a three-dimensional open mesh network structure is provided, and front one the vault the surface the first implant part corresponding concave surface. Both surfaces the implant parts act together in the manner of a joint, and Although in such a way that they each other movements with medial-lateral and dorsal-ventral components.
Darüber hinaus ist vorgesehen, dass in die gewölbte Oberfläche des ersten Implantatteils ein gewölbtes Einlegeteil als Gleitpartner für die konkave Oberfläche des zweiten Implantatteils eingelassen ist. In Analogie hierzu ist vorgesehen, dass in die konkave Oberfläche des zweiten Implantatteils ein zweites Einlegeteil als Gleitpartner für die gewölbte Oberfläche des ersten Implantatteiles eingelassen ist. Durch diese Maßnahmen wird der Gelenkcharakter des Implantates noch stärker herausgehoben. Diese Ausführungsform bietet die Möglichkeit, die gegeneinander laufenden Flächen aus einem anderen Material zu fertigen als die übrigen Teile der Implantatteile, welche üblicherweise aus einem körperverträglichen Metal bestehen werden. Die Einlegeteile als Gleitpartner bieten die Möglichkeit unterschiedliche Paarungen von Gleitpartnern.Furthermore is provided that in the arched surface of the first implant part a curved insert as a sliding partner for the concave surface is embedded in the second implant part. In analogy to this is provided in that in the concave surface of the second implant part a second insert as a sliding partner for the curved surface of the first implant part is admitted. Through these measures the joint character of the implant is lifted even more. This embodiment offers the possibility, the opposing surfaces made of a different material than the other parts of the implant parts, which usually from a biocompatible Metal will be. The inserts offer as sliding partners the possibility different pairings of sliding partners.
Das Halswirbelsäulenimplantat wirkt also wie ein Gelenk, welches alle natürlichen Körperbewegungen des Patienten zulässt. Die Vorraussetzung hierfür ist eine sichere Fixation in den Halswirbelkörpern. Hierzu dient die jeweils plane Auflagefläche beider Implantatteile mit der dreidimensionalen offenmaschigen Raumnetzstruktur. In diese Raumnetzstruktur und durch diese hindurch wachsen Knochentrabekel und sorgen für eine sichere Sekundärfixation. Knochenmaterial organisiert sich nach der Implantation in die Raumnetzstruktur ein und bildet damit die Grundlage für die sichere Sekundärfixation.The cervical spine implant So it acts like a joint, which controls all natural body movements of the patient allows. The prerequisite for this is a secure fixation in the cervical vertebrae. This is the purpose of each flat contact surface of both Implant parts with the three-dimensional open-mesh spatial network structure. In this spatial network structure and through this grow bone trabeculae and take care of a secure secondary fixation. Bone material organizes after implantation in the spatial network structure and thus forms the basis for safe secondary fixation.
Bevorzugt können beide Einlegeteile aus Metall bestehen, wenn dieses als Ausgangsmaterial ein Metallpulver ist, welches in weiteren Schritten versintert wird.Prefers can both inserts are made of metal, if this as a starting material Metal powder is, which is sintered in further steps.
Es ist auch möglich, dass ein Einlegeteil aus Metall und das andere Einlegeteil aus Polyethylen besteht. Diese Paarung ist insbesondere aus der Hüftgelenksendoprothetik bekannt.It is possible, too, one insert is made of metal and the other insert is made of polyethylene. This mating is known in particular from hip arthroplasty.
Eine weitere Möglichkeit besteht darin, dass beide Einlegeteile aus Keramik bestehen.A another possibility is that both inserts are made of ceramic.
Eine noch weitere Ausführungsform sieht vor, dass zumindest ein Einlegeteil aus einem mit einer Glaskeramikschicht beschichteten Metall besteht. Auch die Variante, dass beide Einlegeteile aus dem so beschichteten Metall bestehen, ist möglich.A yet another embodiment provides that at least one insert from a with a glass ceramic layer coated metal. Also the variant that has both inserts Made of the coated metal is possible.
Es ist auch denkbar, dass ein Einlegeteil aus einem keramischen Kompositwerkstoff besteht. An dieser Stelle sei an ein Kompositwerkstoff mit keramischen Anteilen in einer Polyurethanmatrix gedacht.It It is also conceivable that an insert made of a ceramic composite material consists. At this point let s.ein composite material with ceramic Proportions in a polyurethane matrix thought.
Eine weitere Maßnahme ist gemäß einer vorteilhaften Ausführungsform geeignet, die Belastungen noch tiefer in den jeweiligen Halswirbelkörper zu leiten. Danach ist vorgesehen, daß beide Implantatteile rückwärtig wenigstens jeweils einen von medial nach lateral verlaufenden Arretierungssteg aufweisen. Für die Implantation muss eine entsprechende Nut in den jeweiligen Halswirbelkörper gefräst werden, in welche dann der oder die Stege eingesetzt werden können. Die Größenverhältnisse sind dabei so zu wählen, daß der oder die Stege in die Nut oder Nuten eingeschlagen werden können, womit eine gewisse Primärstabilität erzeugt wird.Another measure is suitable according to an advantageous embodiment, the Belastun even deeper into the respective cervical vertebrae. Thereafter, it is provided that both implant parts have at least one backward extending from medial to lateral Arretierungssteg. For the implantation, a corresponding groove must be milled into the respective cervical vertebral body, into which then the bar or struts can be inserted. The proportions are to be chosen so that the one or more webs can be taken in the groove or grooves, whereby a certain primary stability is generated.
Die Erfindung wird anhand eines Ausführungsbeispieles gemäß der Zeichnungsfiguren näher erläutert. Hierbei zeigt:The Invention is based on an embodiment according to the drawing figures explained in more detail. in this connection shows:
Nachfolgend sind gleiche Teile mit denselben Bezugszeichen versehen.following the same parts are provided with the same reference numerals.
Einen
ersten Überblick
verschafft
Deutlich
erkennbar ist das erste Implantatteil
Rückwärtig sind
beide Implantatteile
Die
Beide Implantatteile sind fast nierenförmig ausgebildet und mit dieser Außenkontur jenen der Halswirbelkörper angepasst.Both Implant parts are almost kidney-shaped and with this outer contour those of the cervical vertebrae customized.
Claims (7)
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DE2003161957 DE10361957B4 (en) | 2003-12-23 | 2003-12-23 | cervical spine implant |
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DE2003161957 DE10361957B4 (en) | 2003-12-23 | 2003-12-23 | cervical spine implant |
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DE10361957A1 DE10361957A1 (en) | 2005-07-21 |
DE10361957B4 true DE10361957B4 (en) | 2006-03-02 |
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Also Published As
Publication number | Publication date |
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DE10361957A1 (en) | 2005-07-21 |
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OP8 | Request for examination as to paragraph 44 patent law | ||
8364 | No opposition during term of opposition | ||
R081 | Change of applicant/patentee |
Owner name: ORTHODYNAMICS GMBH, DE Free format text: FORMER OWNER: ESKA IMPLANTS GMBH & CO.KG, 23556 LUEBECK, DE Effective date: 20110707 |
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R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20130702 |