Hass Co., Ltd.

Other

Kyung Sik Oh

Hyung Bong Lim

Yong Su Kim

Joon Hyung Kim

Young Pyo Hong

Hyun Jun Jeon

Cheol Young Kim

Sung Ho Ha

Sung Min Kim

Si Won Son

Yena Kim

Se-Hoon Kim

Jin Su Jeong

Yong-Su Kim

Hyun-Jun Jeon

Sung Ki Kim

Provided is a silicate glass, a method for preparing a silicate glass-ceramics by using the silicate glass, and a method for preparing a lithium disilicate glass-ceramics by using the silicate glass, and more particularly, to a method for preparing a glass-ceramics that has a nanosize of 0.2 to 0.5 &#x3bc;m and contains lithium disilicate and silicate crystalline phases. A nano lithium disilicate glass-ceramics containing a SiOcrystalline phase includes: a glass composition including 70 to 85 wt % SiO, 10 to 13 wt % LiO, 3 to 7 wt % POworking as a nuclei formation agent, 0 to 5 wt % AlOfor increasing a glass transition temperature and a softening point and enhancing chemical durability of glass, 0 to 2 wt % ZrO, 0.5 to 3 wt % CaO for increasing a thermal expansion coefficient of the glass, 0.5 to 3 wt % NaO, 0.5 to 3 wt % KO, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and LaO.

Silicate glass, method for preparing silicate glass-ceramics by using the silicate glass, and method for preparing nano lithium disilicate glass-ceramics by using the silicate glass

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.

Dental composite comprising glass ceramic

Provided is a dental bulk block for grinding processing. The dental bulk block includes a crystalloid, which includes lithium disilicate as a main crystal phase and silicate as a sub-crystal phase, and hyaline as a remainder. The dental bulk block is a functionally gradient material having a crystalline size gradient with respect to a depth thereof and having no interface at a change point of a crystalline size gradient value. The dental bulk block is useful for manufacturing an artificial dental prosthesis that is similar to natural teeth. Accordingly, the time and process for manufacturing the artificial dental prosthesis are shortened, and structural stability is increased in terms of dispersion of force due to gradient functionalization of mechanical properties.

Dental bulk block for grinding processing and method of manufacturing the same

Provided is 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&#xb0; 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&#xb0; C., so that translucency is adjusted by a temperature of the second heat treatment.

Method for preparing glass-ceramics, capable of adjusting machinability or translucency through change in temperature of heat treatment

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&#xb0; 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&#xb0; C., so that translucency is adjusted by a temperature of the second heat treatment.

A method of bonding a high-strength zirconia post serving as a core in a glass-ceramic block, a method of bonding a metal link fastened with an implant fixture to the zirconia post, and glass-ceramic bondable to the zirconia post and a preparation method thereof, when preparing artificial teeth through a CAD/CAM processing method by using the glass-ceramic block as an artificial-teeth material. The lithium disilicate glass-ceramics containing cristobalite crystalline includes glass-ceramics composition including 10 to 15 wt % LiO, 68 to 76 wt % SiO, 2 to 5 wt % POworking as a nuclei formation agent, 0 to 5 wt % AlOto increase glass transition temperature and softening temperature and increase chemical durability of the glass, 2 to 3 wt % ZrO, 0.5 to 3 wt % CaO for enhancing a thermal expansion coefficient of the glass, 0.5 to 5 wt % NaO, 0.5 to 5 wt % KO, and 1 to 2 wt % colorants, and 0 to 2.0 wt % mixture of MgO, ZnO, F, and LaO.

Dental glass-ceramics block bonded with abutment and preparation method thereof

Exemplary embodiments of the present disclosure provide a lithium silicate crystalline or amorphous glass overlaying the top surfaces of zirconia and the manufacturing process thereof. More specifically, exemplary embodiments of the present disclosure provide a lithium silicate glass or lithium silicate crystalline glass with high light transmittance and good coloring characteristics and the manufacturing process thereof, which overlays the top surface of zirconia with high mechanical strength, frameworks, or copings. The lithium silicate crystalline or amorphous glass may include 10-15 wt % LiO, 71.1-85.0 wt % SiO, 2-5 wt % POworking as nuclear formation agent, 1-5 wt % AlOto increase glass transition temperature and softening temperature, as well as chemical durability of the glass, and 0.01-1.0 wt % ZrOwhich increases the binding strength of the zirconia substructure.

Lithium silicate amorphous or crystalline glass overlaying top surface of zirconia and preparation methods thereof

Provided is lithium disilicate crystalline glass containing cristobalite crystal phase for high strength and aesthetic traits and its manufacturing process thereof. Exemplary embodiments of the present invention provide the high strength and aesthetic lithium disilicate crystalline glass, one kind of dental restoration materials, and its manufacturing method which induces the growth of the different crystal phase, cristobalite, from glass with lithium disilicate crystal.

High strength and aesthetic lithium disilicate crystalline glass-ceramics containing cristobalite crystal and preparation method thereof

A method of manufacturing a ceramic primary crown including mixing a source material including zirconia or alumina that configures a frame of a primary crown, a polymer for reducing viscosity and applying ductility upon injection molding, and a toner for providing the same or similar color as baby teeth, heating the polymer contained in the mixed source material to have ductility, injection molding the heated source material, extracting the polymer to reduce brittleness and increase ductility with respect to the injection-molded matter, removing fat to completely eliminate the polymer element from the injection-molded matter, from which the polymer is partially extracted through the polymer extraction, sintering the fat-removed body, from which the polymer is removed, to improve mechanical properties, and polishing an outer surface of the sintered body to provide gloss, and performing barrel-finishing to remove a burr.

Method of manufacturing ceramic primary crown and ceramic primary crown manufactured by the same

The present invention relates to a method of making bean curd using rice in which 65-70 wt % of soya beans and 30-35 wt % of parched rice in about a total weight of 5 kg for one block of bean curd are soaked, and in which the soya beans are soaked for about 8-12 hours and the parched rice is soaked for about 2 hours in water. The soya beans and parched rice are then mixed and ground into a powder with the addition of 15 g of a defoaming agent and 60 g of water. Bean curd refuse is filtered by passing the mixture through a filter, and then the remaining parched rice/soya bean milk is boiled at 80-99&#xb0; C. Water and 42 g of magnesium chloride added to the heated parched rice/bean curd milk, 14 g of salt or JukYum (salt roasted in bamboo) is added and the mixture is coagulated. The coagulated mixture is then mashed to a diameter or 3-4 cm and then pressed. Accordingly, consumers' health can be improved by the bean curd containing rice, and it is possible to satisfy various tastes of the consumers by providing high-quality bean curd.

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Incheon, South Korea

Kyung Sik Oh