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Bone anchoring element and stabilization device for bones in particular for the spinal column

A stabilizing device and anchoring technology, applied in the direction of fixators, internal fixators, spinal implants, etc., can solve problems such as not being able to tolerate for a long time

Inactive Publication Date: 2010-03-10
BIEDERMANN TECH GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, flexible rods made of metal or elastomers cannot withstand large forces for a long time due to their small diameter

Method used

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  • Bone anchoring element and stabilization device for bones in particular for the spinal column
  • Bone anchoring element and stabilization device for bones in particular for the spinal column
  • Bone anchoring element and stabilization device for bones in particular for the spinal column

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] like Figure 1-5 As shown in , the bone stabilization device 1 according to the first embodiment comprises a flexible rod 2 and at least one laterally arranged connecting rod 3, both of which are connected to bone anchoring elements 4, 4' .

[0033] The flexible rod 2 comprises at least one flexible portion 2a which exhibits flexibility under compressive and elongative forces acting along the rod axis and under torsion, shear and / or bending forces . In the illustrated embodiment, the flexible rod 2 is made of a rigid material (e.g. biocompatible metal, metal alloy, especially titanium, nitinol, stainless steel) or a rigid biocompatible plastic material (e.g. PEEK or carbon fiber reinforced PEEK). made of hollow tubes. The length of the flexible rod is such that the flexible rod spans the distance between at least two adjacent vertebrae, and in the illustrated embodiment three adjacent vertebrae. The flexible parts 2a are arranged between the rigid parts 2b. The rig...

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PUM

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Abstract

A bone anchoring element is provided comprising an anchoring section (41) for anchoring in the bone and a receiving part (43) connected to the anchoring section, wherein the receiving part (43) comprises an opening (45) suitable for accommodation of a stabilization rod (2,20) having a rod axis, the opening (45) being limited perpendicular to the rod axis by two side walls (46a,46b), characterizedin that the side walls (46a,46b) comprise guides (47a,47b;47a',47b';470a,470b) orientated parallel to the rod axis for guiding at least one connection rod (3,3',3'') therethrough.

Description

technical field [0001] The present invention relates to a bone anchoring element and a stabilization device for bone, especially for the spine, comprising such a bone anchoring element. The receptacle has a U-shaped groove forming a channel into which a stabilizing rod can be inserted and additionally comprises a lateral guide for receiving a connecting rod with a smaller diameter. The stabilization device comprises at least two such anchoring elements and at least one connecting rod. The bone anchoring element is preferably a polyaxial bone screw. Background technique [0002] In cases of replacement of severely damaged or degenerated discs or vertebrae, fusion cages or segmental stabilization devices using rigid metal rods anchored in adjacent vertebrae with polyaxial bone screws are commonly employed. [0003] In certain clinical applications, it is advantageous to maintain some mobility in the motion segment of the spine. In these cases a dynamic stabilization system ...

Claims

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Application Information

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IPC IPC(8): A61B17/86A61B17/70
CPCA61B17/7028A61B17/701A61B17/7011A61B17/7041A61B17/7032A61B17/7037A61B17/58A61B17/70A61F2/44A61B2017/564
Inventor L·比德曼J·哈姆斯H·拉普B·丹内克尔
Owner BIEDERMANN TECH GMBH & CO KG