Patent number 8632337 is assigned to Dental Vision BVBA (Tervuren, BE).
The following quote was obtained by the news editors from the background information supplied by the inventors: "The invention concerns a method to determine the position of a dental implant, which is fixed to the bone of the jaw of a person, in relation to said jaw, whereby an image is formed of the jaw or of a reproduction model of this jaw with the prosthetic element by means of X-rays or magnetic resonance (NMR).
"More particularly, when manufacturing dental prostheses which are mounted on an implant in the oral cavity of a patient, the implant must be precisely positioned in relation to the jaw. This is particularly the case when one wishes to manufacture a superstructure for a dental prosthesis by milling it for example out of a chunk of metal.
"However, the known techniques do not allow to determine the three-dimensional position of an implant in the jaw of a person in a simple and precise manner. It is not possible, for example, to form a sharp image with sufficient contrast of an implant in a jaw by means of X-rays. From such an image obtained with X-rays, the orientation and the position of an implant cannot be derived with great precision."
In addition to the background information obtained for this patent, NewsRx journalists also obtained the inventor's summary information for this patent: "The invention aims to provide a method which makes it possible to determine the orientation and the position of a prosthetic element, such as a dental implant, in relation to a jaw in which this element is fixed, with very great precision.
"To this aim, a marker element is fixed to said prosthetic element. This marker element produces a strong contrast when making X rays. The position of the marker element in relation to the jaw is hereby determined on the basis of the image which is formed with said X-rays. Next, the position of the above-mentioned prosthetic element is derived from the observed position of said marker element.
"Practically, a support made of a material which is transparent to X-rays, in which said marker element is provided, is fixed to said prosthetic element in a detachable manner.
"According to a preferred embodiment of the method according to the invention, when the prosthetic element consists of a dental implant or comprises such an implant, said support, which is preferably bar-shaped en detachable, is fixed to the free end of said implant, such that this support extends coaxially to the implant.
"In an advantageous manner, use is made of a spherical marker element which is preferably made of tantalum, platinum or tungsten.
"According to an interesting embodiment of the method according to the invention, said image is formed by means of computer tomography.
"The invention also concerns a marker element to determine the position of a prosthetic element which is fixed to the jaw of a person, such as a dental implant, in relation to this jaw, whereby an image is formed of the jaw or of a reproduction model of this jaw with the prosthetic element by means of X-rays or another imaging technique. This marker element is characterised in that it produces a strong contrast in X rays, compared to said prosthetic element itself.
"This marker element preferably mainly consists of tantalum, platinum or tungsten.
"According to a specific embodiment of the marker element according to the invention, it is provided on a support having means to be fixed to said prosthetic element in a detachable manner, in a fixed position."
URL and more information on this patent, see: De Clerck,
Keywords for this news article include: Dentistry, Dental Vision BVBA.
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