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Body joint replacement titanium implant comprising one or several base bodies

A technology for implants and joints, applied in the direction of joint implants, joint implants, hip joints, etc., can solve the problems of not being able to prevent fixation, achieve the effect of preventing cold welding and improving slidability

Inactive Publication Date: 2006-09-06
NEW YORK CITY DEPARTMENT OF TRANSPORTATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a polished surface delays osteocyte formation on metal surfaces, it does not prevent firm fixation in bone

Method used

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  • Body joint replacement titanium implant comprising one or several base bodies
  • Body joint replacement titanium implant comprising one or several base bodies
  • Body joint replacement titanium implant comprising one or several base bodies

Examples

Experimental program
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Embodiment Construction

[0013] figure 1 The hip implant consists of a base body 1 with a region 2 in its proximal part, which is firmly fixed to the bone. The region preferably has a rough surface, which is formed by sandblasting with a coarse-grained material or by titanium coating. In order to stimulate bone growth, it is advantageous to coat the rough surface with one or more absorbable calcium phosphate layers. In the region of the distal end of the implant, a region 3 which is not intended to ossify and is thus anodically (type II) oxidized adjoins the aforementioned region. During the surface modification, oxygen and silicon are introduced into the titanium surface, where they form the integral constituents of the conversion layer. Said regions do not have a TiO2 layer. Carbon and nitrogen can also be introduced into the conversion layer if desired.

[0014] On the one hand, the transformed layer prevents the growth of bone cells. However, the conversion layer also imparts greater hardness...

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PUM

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Abstract

The invention relates to a body joint replacement titanium implant comprising one or several base bodies. In known titanium implants, there is a risk of loosening due to the anchoring of the implants in the bone at points where an optimum bone regeneration is undesirable. The functioning of the joints of the implants can be impaired by coalescing with connective tissue. The novel titanium implants avoid said problems by virtue of the fact that parts (3, 4, 8, 9) of the implant are provided with an anodically (type II) oxidised layer containing oxygen and silicon.

Description

technical field [0001] The present invention relates to a titanium implant having one or more matrices fixed in bone. Background technique [0002] Titanium or titanium alloys are used in orthopedics as material for the production of implants, since titanium or titanium alloys are on the one hand lighter than steel alloys and on the other hand are biocompatible. This allows the implant to coalesce, for example, with bone cells. [0003] But for some implants, this incorporation is only partially desired. For example, in order to fix cement-free hip implants, it is required to stimulate the growth of bone cells in its proximal part, so as to achieve a good connection between bone and implant. Since, as Wolff's law teaches, regeneration of bone is strongest where there is an optimal physiological load, there is a risk that the region of bone regeneration will migrate to the distal portion of the implant. Bone growth is most strongly stimulated in this area, and it is here t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61L27/32A61F2/30A61L27/30A61F2/36A61F2/38A61F2/42A61L27/58A61L27/50A61F2/00A61F2/46A61L27/06
CPCA61L27/30A61F2/30767A61F2/3094A61F2/36A61F2/3662A61F2/367A61F2/3676A61F2/38A61F2/4241A61F2002/30016A61F2002/30028A61F2002/30064A61F2002/30322A61F2002/30332A61F2002/30604A61F2002/30626A61F2002/3069A61F2002/30878A61F2002/30906A61F2002/30922A61F2002/30929A61F2002/3093A61F2002/30932A61F2002/3611A61F2002/3625A61F2002/365A61F2002/4641A61F2220/0033A61F2250/0019A61F2250/0026A61F2250/0051A61F2310/00023A61F2310/00407A61F2310/00598A61F2310/00616A61F2310/00796A61L27/06A61L27/306A61L27/32A61L2430/24A61F2002/30624
Inventor H-G·诺伊曼P·泽格尔G·梅尔索姆E·赫尔姆森
Owner NEW YORK CITY DEPARTMENT OF TRANSPORTATION
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