Process for Producing a Blank for Dental Restorations by Way of a Multi-Step Sedimentation Process

    公开(公告)号:US20240350239A1

    公开(公告)日:2024-10-24

    申请号:US18559647

    申请日:2022-05-19

    IPC分类号: A61C13/00 A61C13/08

    CPC分类号: A61C13/0022 A61C13/082

    摘要: The present invention relates to a process for producing a color-graded blank for dental restorations by way of a sedimentation process, to a blank obtained by the process according to the invention and to the use of a suspension for producing a color-graded dental restoration. The method comprises: a) providing a suspension comprising i) a liquid dispersant and ii) a base material and iii) one or more coloring substances; b) partial sedimentation with the formation of a sediment having a color gradient and a suspension supernatant; c) optionally completely or partially removing the suspension supernatant; d) adding a suspension comprising coloring substances, which suspension differs from the suspension in step a); e) sedimentation or partial sedimentation with the formation of a sediment having a color gradient and a suspension supernatant; f) optionally repeating steps c) and d) or step d) one or more times; g) solidifying the sediment with the formation of a color-graded blank.

    Dental zirconia blank having high relative density

    公开(公告)号:US12115032B2

    公开(公告)日:2024-10-15

    申请号:US18136575

    申请日:2023-04-19

    申请人: SHOFU INC.

    IPC分类号: A61C13/00 A61C13/08

    摘要: The present disclosure relates to a dental cutting zirconia blank having high relative density for preparing a dental restoration. More specifically, the present disclosure relates to a dental cutting zirconia blank which consists of a zirconia ceramics used for the cutting with the CAD/CAM system in the dental field, a semi-sinter zirconia blank (pre-sintered body) of which has high relative density, and which can provide a prosthesis device having high aesthetics after sintering. There is provided a dental cutting zirconia blank wherein the dental cutting zirconia blank has at least one layer consisting of zirconia powder containing 4 to 15 mol % of yttria or erbium oxide as a stabilizer, a relationship among pre-sintering density, final-sintering density and relative density satisfies the following relation:

    54≤Relative density (%)={(Pre-sintering density)/(Perfect-sintering density)}×100≤70.

    Method for manufacturing a glazed dental prosthesis

    公开(公告)号:US12109083B2

    公开(公告)日:2024-10-08

    申请号:US17914859

    申请日:2021-03-29

    摘要: In one aspect, a method for manufacturing a glazed dental prosthesis includes at least the steps of: a) providing a dental prosthesis body; b) position sensitive application of a predetermined amount of a glaze composition to at least a part of the dental prosthesis body surface, wherein the glaze comprises a heat sensitive coloring indicator and wherein this step is performed one or more times; c) controlling the applied glaze amount at least at one position of the glazed dental prosthesis body surface by assessing the color intensity at that position; and d) subjecting the coated dental body to a heat treatment to form the glazed dental prosthesis, wherein the temperature in the heat treatment is larger or equal to the de-composition temperature of the heat sensitive color indicator, wherein at least 90 mol-% of the coloring indicator are transformed into the colorless leuko-form.