公开(公告)号：US20240374361A1

公开(公告)日：2024-11-14

申请号：US18782203

申请日：2024-07-24

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM ,  Si Won SON ,  Seong Eun LEE

IPC: A61C13/00

Abstract: The present disclosure 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 10-70 nm 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 60 mm and a thickness of at least 6 mm. The present disclosure has the following advantages: 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 by using a single blank, the blank use efficiency can be improved, and dental restoration productivity can be improved.