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Process for providing a topography to the surface of a dental implant

a dental implant and topography technology, applied in dental implants, dental prosthetics, dental preparations, etc., can solve the problems of limited use of ceramic materials for dental implants, mismatch with natural tooth color, and dark color of dental implants, and achieve high osteointegration ceramic dental implants, the invention of the present invention, and the effect of fast, efficient and industrially applicabl

Inactive Publication Date: 2008-10-23
STRAUMANN HLDG AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0024]The present invention provides a simple and straightforward process for providing highly osteointegrative properties to the ceramic surface of a dental implant.
[0028]Due to its highly osteointegrative surface topography, the dental implant obtainable by the process of the present invention fastly integrates into the bone. This is further substantiated by studies on the cell response to the dental implant of the present invention, revealing a much higher expression of differentiation factors which are known to play a role in the bone formation process.
[0030]The process of the present invention is very simple and allows highly osteointegrative ceramic dental implants to be produced in a fast, efficient and readily industrially applicable manner.

Problems solved by technology

From an aesthetic point of view, titanium implants have, however, the disadvantage that they are dark in color and therefore mismatch with the natural tooth color.
Despite their advantageous properties with regard to the color, the use of ceramic materials for dental implants have been limited by their low fatigue stability and thereby by their tendency to crack.
Conventional techniques for treating the implant's surface in order to achieve a osteointegrative surface have failed, mostly due to the extreme hardness of the material.
The composite structures disclosed in WO-A-2005 / 027771 and EP-A-0870478 have the disadvantage that the ceramic coating is easily chipped off.
However, the level of osteointegration of such zirconia implants revealed by their removal torque values have been shown to be lower compared to the conventionally used titanium implants.

Method used

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  • Process for providing a topography to the surface of a dental implant
  • Process for providing a topography to the surface of a dental implant
  • Process for providing a topography to the surface of a dental implant

Examples

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examples

1. Etching of a Surface Made of Yttria-Stabilized Zirconia Ceramic

[0092]For Examples 1 to 11, densely sintered bodies made of yttria-stabilized zirconia ceramic as described by Burger, W. et al, New Y-TZP powders for medical grade zirconia. J Mater. Sci. Mater. Med. 1997, 8 (2), 113-118, and having the shape of a disc with a diameter of 15 mm and a thickness of 2 mm are prepared by low pressure injection molding and subsequent hot isostatic pressing. The material falls within the definition of ASTM F 1873 and ISO 13356 and is further specified by an average grain size from about 0.1 μm to about 0.3 μm.

[0093]For preparing the bodies, casting molds are used which optionally have been treated by erosion techniques to obtain a macroscopic roughness (or “macroroughness”) on the inner surface of the mold. Depending on the erosion parameters used, a pronounced or a non-pronounced macroroughness is, thus, provided to the surface of the body. Alternatively, a pronounced macroroughness can al...

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Abstract

A process for providing a topography to the surface of a dental implant, said surface being made of a ceramic material. At least a part of the surface of the dental implant is etched with an etching solution comprising hydrofluoric acid at a temperature of at least 70° C. Thereby, discrete grains or agglomerates of grains are removed from the ceramic material.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a process for providing a topography to the surface of a dental implant, to a dental implant obtainable by this process, and to the use of a solution comprising hydrofluoric acid for etching the ceramic surface of a dental implant.BACKGROUND[0002]Dental implants which are inserted into the jawbone, for example for the attachment of artificial teeth, have been successfully used for more than a decade. The major part of the dental implants currently used consist of titanium, since titanium is biocompatible, has a sufficiently low elastic modulus and a relatively high strength.[0003]Apart from its biocompatibility and its mechanical properties, the osteointegrative properties of a dental implant are of major importance. A good osteointegration means that the implant, after reaching a primary stability by screwing it into the bone, safely ossifies within a short healing time so that a permanent bond between implant and bone is...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61C13/34
CPCA61C8/0012C04B2111/00836A61K6/024A61K6/0255A61C2008/0046C04B41/5353C04B41/009C04B41/91A61C8/0037A61C13/00A61C13/206A61L27/10A61L2430/12C23F1/30C04B35/00C04B35/48A61C8/00A61K6/818A61K6/824A61K6/822
Inventor HOMANN, FRANKHABERSETZER, PHILIPPE
Owner STRAUMANN HLDG AG
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