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Manufacturing method of the molded zirconia crowns
The present invention relates to a method for manufacturing a pre-molded zirconia crown for dental restoration, which is manufactured by injection molding and sintering, secures a color tone by an immersion method, and forms a dense structure through isostatic heating. According to the present invention, the method comprises: a step of molding zirconia powder including 3 to 5% of yttria added thereto by injection molding; a preliminary sintering step of sintering and degreasing the molded body; a primary cooling step of primarily cooling the preliminary sintered body; a two-step heat treatment step of heating the cooled sintered body; a cooling step of cooling the heat-treated body; a step of immersing the cooled heat-treated body in an aqueous metal chloride solution and drying the same; a step of secondary sintering the immersed heat-treated body and cooling the secondary sintered body; and a step of isotropic pressure sintering the secondary sintered body. Accordingly, provided are effects of manufacturing an aesthetic zirconia pre-formed crown close to the natural tooth securing a production capacity capable of performing mass-production.
본 발명은 사출성형 및 소결로 제작하고, 침지방식으로 색조를 확보하고 등방압 가열을 통해 치밀한 조직을 형성하는 치아수복용 지르코니아 기성형 크라운의 제조방법에 관한 것이다. 본 발명은, 이트리아가 3~5%첨가된 지르코니아 분말을 사출방식으로 성형하는 단계, 이를 소결하여 탈지하는 예비 소결단계 및 냉각하는 1차 냉각단계, 상기 냉각된 예비 소결체를 열처리하는 2단계 열처리단계 및 냉각하는 냉각단계, 이를 금속염화물 수용액에 침지 및 건조하는 단계, 이를 2차소결 및 냉각하는 단계, 이를 등방 가압 소결하는 단계를 포함하는 것을 특징으로 한다. 이에 자연치에 근접한 심미적 지르코니아 기성형 크라운을 제작할 수 있으며 대량생산이 가능한 생산량을 확보하는 효과를 제공한다.
Manufacturing method of the molded zirconia crowns
The present invention relates to a method for manufacturing a pre-molded zirconia crown for dental restoration, which is manufactured by injection molding and sintering, secures a color tone by an immersion method, and forms a dense structure through isostatic heating. According to the present invention, the method comprises: a step of molding zirconia powder including 3 to 5% of yttria added thereto by injection molding; a preliminary sintering step of sintering and degreasing the molded body; a primary cooling step of primarily cooling the preliminary sintered body; a two-step heat treatment step of heating the cooled sintered body; a cooling step of cooling the heat-treated body; a step of immersing the cooled heat-treated body in an aqueous metal chloride solution and drying the same; a step of secondary sintering the immersed heat-treated body and cooling the secondary sintered body; and a step of isotropic pressure sintering the secondary sintered body. Accordingly, provided are effects of manufacturing an aesthetic zirconia pre-formed crown close to the natural tooth securing a production capacity capable of performing mass-production.
본 발명은 사출성형 및 소결로 제작하고, 침지방식으로 색조를 확보하고 등방압 가열을 통해 치밀한 조직을 형성하는 치아수복용 지르코니아 기성형 크라운의 제조방법에 관한 것이다. 본 발명은, 이트리아가 3~5%첨가된 지르코니아 분말을 사출방식으로 성형하는 단계, 이를 소결하여 탈지하는 예비 소결단계 및 냉각하는 1차 냉각단계, 상기 냉각된 예비 소결체를 열처리하는 2단계 열처리단계 및 냉각하는 냉각단계, 이를 금속염화물 수용액에 침지 및 건조하는 단계, 이를 2차소결 및 냉각하는 단계, 이를 등방 가압 소결하는 단계를 포함하는 것을 특징으로 한다. 이에 자연치에 근접한 심미적 지르코니아 기성형 크라운을 제작할 수 있으며 대량생산이 가능한 생산량을 확보하는 효과를 제공한다.
Manufacturing method of the molded zirconia crowns
지르코니아 기성형 크라운 제조방법
LEE TAE SUNG (author)
2021-04-23
Patent
Electronic Resource
Korean
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