Title:
LARGE-AREA BLANK FOR PROSTHESIS FABRICATION AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/146227
Kind Code:
A1
Abstract:
The present invention provides a large-area blank wherein no crystal-phase peak exists in the range of 2θ 10-70, and the degree of crystallinity of 0.00% in an X-ray diffraction analysis pattern using CuKα rays, but crystalline particles having an average particle size of 10-70nm are confirmed to be distributed in an amorphous SiO2-Li2O-Al2O3-series glass matrix from an SEM-based analysis, and the blank has a long-axis length of at least 60mm and a thickness of at least 6mm. The present invention is advantageous as follows: the blank is a workpiece having a large area and excellent processability such that processability can be improved during cutting, thereby reducing tool resistance and wear ratio, and increasing the tool lifespan; edge chipping can be reduced during processing; when fabricating multiple dental restorations successively as needed by using a single blank, the blank use efficiency can be improved, and dental restoration productivity can be improved; high-strength dental restorations having different degrees of transparency can be manufactured from processed dental restorations through simple processes with different post heat treatment conditions; and dental restorations that implement various shades can be manufactured through a single blank, thereby contributing to circulation management simplification.
Inventors:
LIM HYUNG BONG (KR)
KIM YONG SU (KR)
SON SI WON (KR)
LEE SEONG EUN (KR)
KIM YONG SU (KR)
SON SI WON (KR)
LEE SEONG EUN (KR)
Application Number:
PCT/KR2023/001018
Publication Date:
August 03, 2023
Filing Date:
January 20, 2023
Export Citation:
Assignee:
HASS CO LTD (KR)
International Classes:
A61C13/00; A61C5/70; A61C13/083; C03B11/12; C03C3/085; C03C3/097; C03C4/00; C03C10/00
Domestic Patent References:
| WO2013167722A1 | 2013-11-14 |
Foreign References:
| KR20200137198A | 2020-12-09 | |||
| KR20180018929A | 2018-02-22 | |||
| KR20200118375A | 2020-10-15 | |||
| KR102127542B1 | 2020-06-29 |
Attorney, Agent or Firm:
HAEDAM IP GROUP (KR)
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