摘要:
Method for the manufacturing of a dental restoration including a dental restoration core 2 and a veneer layer 3, the veneer layer 3 being located at predetermined locations on the dental restoration core 2 and having predetermined thickness at the predetermined locations; the method including: manufacturing the dental restoration core; filling a void 5 in a mould block 1; 10 with a slurry or paste containing a constituent material for a veneer layer, the dental restoration core being positioned in the void; pressing the slurry or paste into the void, the void being arranged to have the slurry cover the dental restoration core at at least the predetermined locations; heating the slurry or paste in a hardening or pre-sintering process to obtain a hardened veneer structure covering the dental restoration core; milling a contour of the veneer layer into the hardened veneer structure to form the dental restoration.
摘要:
The present invention relates to a method for manufacturing a tooth prosthesis, for insertion in a jawbone, including an implant and an abutment on top of the implant. The method includes: defining a shape of the prosthesis and its location in the jawbone by using first data from a first CT scan image of the jawbone and second data from a second image of a gypsum cast, correlating first and second data by extracting from the first data first position reference data of a first reference in the first image, and from the second data second position reference data of a second reference in the second image, the second reference being identical to the first reference; performing a geometric transformation on the second data and/or the first data to have a coincidence of the second image with the first image and to combine the first and second data into composite scan data.
摘要:
The invention relates to silver-palladium alloys for the manufacture of dental prostheses which can be faced with dental ceramic. Because of selected contents of the alloy elements indium, tin and zinc, these cause no discolorations when combined with low-melting dental ceramic with a coefficient of thermal expansion of approx. 16.5 &mgr;m/mK.
摘要:
The present invention relates to a method for manufacturing a tooth prosthesis, for insertion in a jawbone, including an implant and an abutment on top of the implant. The method includes: defining a shape of the prosthesis and its location in the jawbone by using first data from a first CT scan image of the jawbone and second data from a second image of a gypsum cast, correlating first and second data by extracting from the first data first position reference data of a first reference in the first image, and from the second data second position reference data of a second reference in the second image, the second reference being identical to the first reference; performing a geometric transformation on the second data and/or the first data to have a coincidence of the second image with the first image and to combine the first and second data into composite scan data.
摘要:
A method for manufacturing a heat-resistant mold for manufacturing a dental restoration, wherein a wax model is manufactured in a conventional manner and wherein from a powdered heat-resistant material consisting of powdered particles coated with a hydrophobic material liquid at room temperature, with water or another mixing liquid, a slurry is prepared, wherein the slurry is applied to the wax model, and wherein the wax model covered slurry is subjected to a heating step, wherein the wax is burnt off.
摘要:
The invention relates to a method for manufacturing a dental restoration, comprising the steps of applying a powdered dental metal comprising composition to a refractory model mass, which powdered dental metal consist of at least three alloys each having a different solidus temperature, the difference between the successive solidus temperatures always ranging between 25 and 100.degree. C., heating the powdered dental material in such a manner that one porous mass is formed, and infiltrating the porous mass with a filler metal alloy in such a manner that the refractory model mass is provided with a homogenous metal coating.
摘要:
Method for the manufacturing of a dental restoration including a dental restoration core 2 and a veneer layer 3, the veneer layer 3 being located at predetermined locations on the dental restoration core 2 and having predetermined thickness at the predetermined locations; the method including: manufacturing the dental restoration core; filling a void 5 in a mould block 1; 10 with a slurry or paste containing a constituent material for a veneer layer, the dental restoration core being positioned in the void; pressing the slurry or paste into the void, the void being arranged to have the slurry cover the dental restoration core at at least the predetermined locations; heating the slurry or paste in a hardening or pre-sintering process to obtain a hardened veneer structure covering the dental restoration core; milling a contour of the veneer layer into the hardened veneer structure to form the dental restoration.
摘要:
The present invention relates to a process for the preparation of a full-ceramic dental restoration, comprising heat pressing of a tooth coloured pressing glass on a fully or partially supporting structure of yttria doped tetragonal zirconia (YTZP), comprised of yttria doped tetragonal zirconia ceramic having a grain size, as measured by the linear intercept method, of less than 0.6 μm, wherein the pressing glass has a thermal expansion coefficient (TEC) of between 9.0 and 11.0 μm/m.K (measured in the range of from 25 to 500° C.) and wherein the pressing glass has a pressing temperature of between 750 and 1200° C. In a further aspect, the invention relates to a full-ceramic dental restoration, comprising a fully or partially supporting structure of yttria doped tetragonal zirconia (YTZP) and a heat pressed tooth coloured pressing glass, which restoration is modeled to be in occlusal contact with opposing teeth and in mesio-distal contact with neighbouring teeth.
摘要:
The invention relates to a method for producing an artificial tooth, comprising a base layer substantially determining strength and at least one cover layer substantially determining appearance of a finished artificial tooth, said method comprising: establishing the available outer shape and dimensions for the finished artificial tooth, e.g. with a CAD-CAM system; acquiring an image of a natural tooth to be replaced by the artificial tooth or a corresponding natural tooth over at least the in use visible outer surface thereof, including variations in appearance in said outer surface; determining in the appearance determining properties of the cover layer to correspond with the variations in the appearance of the natural tooth to be replaced or the corresponding natural tooth, and determining a thickness of the cover layer locally required for said correspondence; constructing the base layer to a shape and dimensions, which are based on the shape and dimensions available for the artificial tooth and prior to construction deducting, in the CAD-CAM system therefrom the locally required thickness of the cover layer; and applying the cover layer over the base layer to attain the available outer shape and dimensions for the finished artificial tooth.
摘要:
A pressable glass ceramic which contains lithium silicate glass and leucite is disclosed. Also, disclosed is the combination of leucite and a lithium silicate glass to stably increase the coefficients of thermal expansion of the resulting glass composition, and the preparation of leucite suitable for addition to the glass composition. Also disclosed are methods for fabricating glass ceramic and dental products from the pressable glass ceramic.