公开(公告)号：US20210214483A1

公开(公告)日：2021-07-15

申请号：US16954779

申请日：2020-02-04

Applicant: HASS CO., LTD.

Inventor： Yong Su KIM ,  Hyung Bong LIM ,  Kyung Sik OH ,  Sung Min KIM ,  Young Pyo HONG ,  Joon Hyung KIM ,  Si Won SON ,  Yena KIM

IPC: C08F222/10 ,  C03C10/00 ,  C08F222/22 ,  C08K9/06 ,  C08K3/40 ,  A61K6/833 ,  A61K6/60 ,  C03C17/30

Abstract: Dental composite composition including a glass ceramic and a curable organic material is described in which the glass ceramic includes a crystal phase having an average grain size of 50 to 400 nm, and the dental composite composition is provided as a dental prosthetic material exhibiting superior transparency and mechanical properties comparing to conventional composite products containing micro-sized crystal grains and also has excellent aesthetics and processability required for prosthetic materials for same-day dental prosthetic service.

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.

公开(公告)号：US20230200937A1

公开(公告)日：2023-06-29

申请号：US18089120

申请日：2022-12-27

Applicant: HASS CO., LTD.

Inventor： Hwan Soon KOH ,  Kyung Sik OH ,  Young Pyo HONG ,  Duk Won HAM ,  Yong Su KIM

IPC: A61C5/77 ,  A61K6/802 ,  A61C13/265 ,  A61L27/10 ,  A61L27/06 ,  A61L27/14

CPC classification number: A61C5/77 ,  A61K6/802 ,  A61C13/2656 ,  A61L27/10 ,  A61L27/06 ,  A61L27/14 ,  A61F2002/30065

Abstract: Proposed is a hybrid ceramic prosthesis. Since the prosthesis is made of a novel hybrid ceramic material, the prothesis has a similar color and transmittance to natural teeth, minimizes tooth removal during preparation for placement of the prothesis, is securely attached to the target tooth by snap-fit fastening to prevent detachment of the prothesis and re-treatment caused by the prothesis detachment, and can be more conveniently applied to the patient than conventional prostheses, enabling an one-day-one-stop dental procedure, thereby reducing burden to patients. The prothesis is useful as a primary crown.

公开(公告)号：US20220378561A1

公开(公告)日：2022-12-01

申请号：US17658112

申请日：2022-04-06

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM

IPC: A61C13/00 ,  C03B32/02 ,  C03C10/00 ,  C03C4/00 ,  A61C5/77 ,  A61C5/73 ,  A61C8/00

Abstract: A dental bulk block for a CAD/CAM machining process. The dental bulk block is a glass-ceramic block having a crystalline phase embedded in an amorphous glass matrix. The crystalline phase includes lithium disilicate as a main crystalline phase, no sub-crystalline phase exists, and the crystalline phase has a mean grain size of 0.01 to 1.0 μm and a crystallinity degree of 25 to 45%. The dental bulk block can improve machinability during cutting such as CAD/CAM machining in the state of a high-strength workpiece with high flexural strength, thereby reducing a tool resistance and a wear rate, increasing a tool life span, and reducing edge chipping during a machining process. In addition, a dental restoration with desired translucency variations can be manufactured through a simple process of machining a block and altering post-heat treatment conditions, and thus can be realized with various shades.

公开(公告)号：US20180257973A1

公开(公告)日：2018-09-13

申请号：US15453296

申请日：2017-03-08

Applicant: HASS CO., LTD

Inventor： Yong Su KIM ,  Hyun Jun JEON ,  Hyung Bong LIM ,  Kyung Sik OH ,  Sung Min KIM ,  Young Pyo HONG ,  Joon Hyung KIM

IPC: C03B32/02 ,  C03C3/097 ,  C03C4/02 ,  C03C4/00 ,  C03C10/00 ,  A61C13/08

CPC classification number: C03B32/02 ,  A61C13/0022 ,  A61C13/083 ,  C03C3/097 ,  C03C4/0021 ,  C03C4/02 ,  C03C10/0027

Abstract: The present invention relates to a method for preparing a lithium disilicate glass-ceramics containing silicate as a main component, and more particularly, to a method for preparing a glass-ceramics, which is capable of adjusting machinability or translucency according to a crystalline size by using a first heat treatment or a second heat treatment. To this end, a method for preparing a glass-ceramics containing a silica crystalline phase includes: performing a first heat treatment on a glass composition at a temperature of 400 to 850° C., so that a lithium disilicate crystalline phase and a silica crystalline phase each having a size of 5 to 2,000 nm are formed through the first heat treatment. After the first heat treatment, the method further includes performing a second heat treatment at a temperature of 780 to 880° C., so that translucency is adjusted by a temperature of the second heat treatment.

公开(公告)号：US20240158288A1

公开(公告)日：2024-05-16

申请号：US18422680

申请日：2024-01-25

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM

IPC: C03C10/00 ,  C03C23/00

CPC classification number: C03C10/0027 ,  C03C23/007 ,  C03C2214/20

Abstract: Methods for manufacturing a glass-ceramic substrate and a glass-ceramic substrate manufactured thereby. The method comprises a step of manufacturing a predetermined-shaped substrate from a specific bulk glass composition, followed by heat treatment step. In the method, the heat treatment step is performed by one method selected from: a) a method of raising and maintaining the temperature within a maximum temperature range of 500° C. to 650° C.; b) a method of raising and maintaining the temperature within a maximum temperature range of 650° C. to 700° C.; c) a method of raising and maintaining the temperature within a maximum temperature range of 700° C. to 800° C.; and d) a method of raising and maintaining the temperature within a maximum temperature range of 800° C. to 870° C., whereby the method is capable of easily manufacturing several types of glass-ceramic substrates with various combinations of flexural strength and light transmittance.

公开(公告)号：US20240090986A1

公开(公告)日：2024-03-21

申请号：US18521267

申请日：2023-11-28

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM

IPC: A61C13/00 ,  A61K6/833 ,  C03B19/02 ,  C03B25/02 ,  C03B32/02 ,  C03C4/00 ,  C03C4/02 ,  C03C10/00

CPC classification number: A61C13/0022 ,  A61K6/833 ,  C03B19/02 ,  C03B25/02 ,  C03B32/02 ,  C03C4/0021 ,  C03C4/02 ,  C03C10/00 ,  A61C13/0004 ,  C03C2204/04

Abstract: A dental bulk block for machining, which is a glass-ceramic block including a crystalline phase in an amorphous glass matrix. The bulk block is a functionally graded material including crystalline phases where among the crystalline phases, a main crystalline phase is lithium disilicate, and an additional crystalline phase includes quartz, lithium phosphate, and at least one selected from among cristobalite and tridymite, in which the main crystalline phase has a size gradient with respect to a depth, and no interface is present at a point where a size gradient value of the main crystalline phase changes. Thus, the bulk block is useful in manufacturing artificial tooth prostheses that are similar to natural teeth and thus can not only reduce the time and processes for manufacturing artificial tooth prostheses but also obtain the effect of enhancing structural stability in terms of force distribution based on functionally graded mechanical characteristics.

公开(公告)号：US20230021279A1

公开(公告)日：2023-01-19

申请号：US17934315

申请日：2022-09-22

Applicant: HASS CO., LTD.

Inventor： Yong Su KIM ,  Kyung Sik OH ,  Hyung Bong LIM ,  Joon Hyung KIM ,  Sung Min KIM ,  Si Won SON ,  Yena KIM

IPC: A61C13/09 ,  A61C13/083 ,  A61C13/00 ,  A61K6/836 ,  A61K6/889

Abstract: Dental prosthesis having a structure similar to that of natural teeth and a method for manufacturing the same. Provided is a dental prosthesis capable of expressing a structure and properties similar to natural teeth in which enamel is a surface layer and dentine is an inner layer underneath the enamel. In addition, a method of manufacturing the same dental prosthesis through three-dimensional printing is provided. The dental prosthesis is a cured product including ceramic particles dispersed in a polymer matrix. The cured product includes a first cured product layer including 70% to 90% by weight of ceramic particles having an average particle diameter of 100 to 1,000 nm and a second cured product layer including 40% to 60% by weight of ceramic particles having an average particle diameter of 10 μm to 500 μm, the second cured product layer being adjacent to the inner surface of the first cured product layer.

公开(公告)号：US20220401311A1

公开(公告)日：2022-12-22

申请号：US17466157

申请日：2021-09-03

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM

IPC: A61K6/833 ,  A61C5/77 ,  A61C5/73

Abstract: Provided is a dental bulk block comprising a crystalline phase includes lithium disilicate as a main crystalline phase and eucryptite as a sub-crystalline phase in an amorphous glass matrix that is a functionally graded material having a main crystalline size gradient with respect to the depth thereof, and having no interface at the point of change in the main crystalline size gradient value, and is useful for manufacturing artificial teeth having structural characteristics similar to those of natural teeth, is facile to machine into an artificial tooth prosthesis due to the inclusion of eucryptite as the sub-crystalline phase compared to when only lithium disilicate exists, and can not only shorten the manufacturing time, but also increase the structural stability in terms of force distribution through functional grading of mechanical properties.

公开(公告)号：US20220096213A1

公开(公告)日：2022-03-31

申请号：US17096381

申请日：2020-11-12

Applicant: HASS CO., LTD.

Inventor： Hyung Bong LIM ,  Yong Su KIM

IPC: A61C13/00 ,  A61C13/083 ,  A61C13/08 ,  B28B11/04 ,  B28B11/08 ,  B28B11/12

Abstract: Disclosed is a machinable dental bulk block that is a glass ceramic block including an amorphous glass matrix and crystalline phases introduced into the matrix. A major crystalline phase is lithium disilicate and a minor crystalline phase is lithium phosphate. The dental block is made of a functionally gradient material in which the major crystalline phase exhibits a gradient of particle sizes in a depth direction of the dental block and which has no interface at a point where the gradient of particle sizes of the major crystalline phase changes. The dental bulk block is useful for production of a dental prosthesis (artificial tooth) similar to a natural tooth. The dental bulk block can reduce time and the number of processing steps to manufacture a dental prosthesis and provides improved structural stability through good force distribution obtained by functionally graded mechanical properties.