Two-Part Implant with a Hydroxylated Soft Tissue Contact Surface

a soft tissue contact surface and implant technology, applied in the field of two-stage implants, can solve the problems of bone resorption, inflammation of the peri-implant mucosa, etc., and achieve the effects of good osteointegration, good osteointegration, and good vivo results

Inactive Publication Date: 2007-08-30
STRAUMANN HLDG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015]In a preferred embodiment of the present invention the soft tissue contact surface is completely hydroxylated. Such an implant showed good results in vivo and said implants are economically interesting and can be produced in a controlled process. In addition it has been shown that with the implants according to the present invention the healing process is improved, that is a good osteointegration as well as an excellent soft tissue integration is achieved. Therefore, the implants comprise a reduced risk of periimplantitis and as a consequence fewer implants will have to be replaced. Due to their purity, meaning that the soft tissue contact surface is free of organic compounds, the surface charge is better available. Therefore, the surface is hydrophilic, which results in an improved soft tissue integration. Therefore, they do not bear the risk of autoimmune reactions and other unwanted side effects.
[0016]In a further embodiment of the present invention the soft tissue contact surface is roughened and hydroxylated. A roughened surface in terms of the present invention means a macroscopic texture of the surface which is obtained for example by sandblasting the soft tissue contact surface. It has been found that if the soft tissue contact surface is roughened and hydroxylated the blood coagulum is stabilized which accelerates the healing procedure.
[0017]In a further embodiment of the present invention the soft tissue contact surface is smooth but hydroxylated. A smooth surface in terms of the present invention means a macroscopic texture of the surface which is obtained for example by machining or additional polishing, preferably by electropolishing the soft tissue contact surface. With a smooth surface the accumulation of plaque can be prevented or at least minimized,

Problems solved by technology

Indeed, the presence of bacteria on the implant surface may lead to an inflammation of the peri-impl

Method used

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Examples

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example 1

Implant With a Roughened Hydroxylated Soft Tissue Contact Surface

[0044]A common shape of dental implant in the form of a screw of diameter 4 mm and length 10 mm was produced. The crude shape was obtained in a manner known per se by removing material from the cylindrical blank by turning on a lathe and milling. The bone contact surface as well as the soft tissue surface were then sandblasted with particles having a mean size of 0.25-0.5 mm as described in EP 0 388 575. The roughened surface was then treated for about five minutes at a temperature above 80° C. with an aqueous hydrochloric acid (conc.) / sulfuric acid (conc.) mixture having an HCl:H2SO4:H2O ratio of 2:1:1. The implant formed in this way was washed with pure water and then heat-sealed directly in a glass ampoule filled with pure water containing 150 mM Na+ ions, and the corresponding amount of Cl− anions.

[0045]To test the soft tissue integration, the above implants were placed in four female fox hounds. Each animal receiv...

example 2

Implant With a Smooth Hydroxylated Soft Tissue Contact Surface

[0046]A common shape of dental implant in the form of a screw of diameter 4 mm and length 10 mm was produced. The crude shape was obtained in a manner known per se by removing material from the cylindrical blank by turning on a lathe and milling. The bone contact surface was then sandblasted with particles having a mean size of 0.25-0.5 mm, whereas the soft tissue contact surface has been electropolished. The sandblasted bone contact surface as well as the electropolished soft tissue contact surface were then treated for about five minutes at a temperature above 80° C. with an aqueous hydrochloric acid (conc.) / sulfuric acid (conc.) mixture having an HCl:H2SO4:H2O ratio of 2:1:1. The implant formed in this way was washed with pure water and then heat-sealed directly in a glass ampoule filled with pure water containing 150 mM Na+ ions, and the corresponding amount of Cl− anions.

[0047]To test the soft tissue integration, the...

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Abstract

Two-part implant for attachment of artificial teeth comprising a base body having a bone contact surface and a soft tissue contact surface. Said soft tissue contact surface is at least partially hydroxylated or silanated which results in an improved soft tissue integration.

Description

FIELD OF THE INVENTION [0001]The present invention relates to a two-stage implant comprising a base body having a bone contact surface and a tissue contact surface and to a method for preparing such an implant.BACKGROUND [0002]Implants which are used for insertion into bone, for example for attachment of artificial teeth, are known per se. Different types of implant systems are known, for example two-part implant systems. Said two-part implant systems comprise first an anchoring part for anchoring within the bone and second a mounting part. Onto the mounting part prosthesis elements, such as bridges or crowns, are screwed or cemented usually using intermediate so-called abutments.[0003]A central property of said implants is their osteointegration time, that is to say the time that passes before the bone substance has become connected with sufficient strength and permanently to the bone contact surface, that is to say it has become integrated with it.[0004]Therefore, much effort has ...

Claims

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Application Information

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IPC IPC(8): A61C8/00
CPCA61C8/0012A61C8/0015A61C8/005A61L27/50A61L2400/18B65D85/50A61C8/0009A61C8/0013A61C8/0093A61C2008/0046A61K6/0023A61L2430/12A61K6/30
Inventor SCHWARZ, FRANKBECKER, JURGENWIELAND, MARCODARD, MICHEL
Owner STRAUMANN HLDG AG
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