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Improved Orthopedic Devices

A technology of orthopedic and restraint devices, applied in medical science, muscles, ligaments, etc., can solve the problem that plane motion cannot replicate actual joint motion, etc.

Inactive Publication Date: 2016-06-15
ALMA MATER STUDIORUM UNIV DI BOLOGNA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] The two surfaces are effectively rolling on top of each other, but the resulting planar motion according to the proposed scheme does not replicate the actual joint motion with sufficient accuracy

Method used

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Examples

Experimental program
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Embodiment Construction

[0032] Referring to the accompanying drawings, especially image 3 , 4 , 5 and 7, numeral 1 denotes an orthopedic device, or in general, a prosthesis of the present invention.

[0033] As described in patent application WO2007 / 074387 (which is hereby incorporated by reference in its entirety), the motion of the joint can be approximated as a spherical motion, that is, with reference to a series of variable directions around points fixed on the two parts Instantaneous rotation of the axis.

[0034] In general, the spherical motion defined by the spherical pair has three degrees of freedom. However, spherical motion similar to knee motion (this specification relates specifically to knee motion, but does not limit the scope of the invention) has only one degree of freedom.

[0035] like figure 1 As shown in , the joint 2 can thus be represented schematically with reference to an equivalent spatial mechanism with one degree of freedom.

[0036] By way of non-limiting example,...

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PUM

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Abstract

An orthopaedic device (1) for the mobile connection of a first bone segment (4) with a second bone segment (5) of an organic system to replace or assist a damaged joint (2) comprises a first component (10) that can be associated with the first bone segment (4) and a second component (11) that can be associated with the second bone segment (5); the first and second components (10, 11) are coupled virtually or physically by a spherical kinematic pair centred at a point (O) that is the centre of a 1-degree-of-freedom spherical motion representing the real relative spatial motion between the first bone segment (4) and the second bone segment (5); the device (1) also comprises connecting elements (20, 21) which guide the relative motion between the first and the second bone segment (4, 5).

Description

technical field [0001] The present invention relates to an improved orthopedic device, and more particularly to an artificial orthopedic device designed to assist or replace damaged joints. Background technique [0002] Artificial orthopedic devices of the prior art are widely used in the field of medical surgery, which are broadly divided into external or limb prostheses, correctors or orthoses and internal or joint prostheses. [0003] In a joint (meaning here any general joint, although for convenience it is preferred to refer to the knee joint) there is contact between joint surfaces that move relative to each other. [0004] This relative movement is essentially defined by relative rolling and relative sliding between the articular surfaces. [0005] Relative motion is ensured by joint structures, such as ligaments, muscles and cartilage tissue, that keep the joint surfaces in the correct relative position. [0006] Internal prostheses can be used to restore joint fun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61F2/38
CPCA61F2/08A61F2/38A61F2002/30639A61F2002/30934A61F2002/30943
Inventor V·帕伦蒂卡斯泰利F·卡塔尼N·桑奇西A·莱亚尔迪尼
Owner ALMA MATER STUDIORUM UNIV DI BOLOGNA