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Zirconium oxide having multilayer structure and having different yttrium oxide contents
Provided is a dental zirconia blank which has high transmittance, can reproduce a color tone close to that of natural teeth, and has intraoral tolerance strength. Also provided is a dental zirconia blank which has high strength and which can be produced even with a 4-unit or more prosthetic device. [Solution] A dental zirconia green body having a plurality of layers, the dental zirconia green body comprising: a first layer comprising a highly transmissive ceramic containing 91.6-96.5 mol% of zirconia and 3.5-8.4 mol% of yttrium oxide, and a second layer comprising a highly transmissive ceramic containing 91.6-96.5 mol% of zirconia and 3.5-8.4 mol% of yttrium oxide; and a second layer comprising a low-transmissivity ceramic containing 95.6 to 98.5 mol% of zirconium oxide and 1.5 to 4.4 mol% of yttrium oxide, said second layer comprising a low-transmissivity ceramic containing 95.6 to 98.5 mol% of zirconium oxide and 1.5 to 4.4 mol% of yttrium oxide. The yttrium oxide content of the low-transmissivity ceramic is 0.5-5.4 mol% less than the yttrium oxide content of the high-transmissivity ceramic, and the first layer is located at one end in the stacking direction of the plurality of layers.
本发明提供一种高透射性且能够再现接近于天然牙的色调并且具有口腔内耐受强度的牙科用氧化锆坯体。进一步地，提供一种具有高强度并且4单位以上的补缀装置也能够制作的牙科用氧化锆坯体。本发明的解决手段是一种牙科用氧化锆坯体，其具有复数的层，其包括：第一层，由高透射性陶瓷构成，该高透射性陶瓷含有91.6‑96.5mol％的氧化锆和3.5～8.4mol％的氧化钇；以及第二层，由低透射性陶瓷构成，该低透射性陶瓷含有95.6‑98.5mol％的氧化锆和1.5～4.4mol％的氧化钇。低透射性陶瓷的氧化钇的含有率比高透射性陶瓷的氧化钇的含有率少0.5‑5.4mol％，并且第一层位于复数的层的层叠方向的一端。
Zirconium oxide having multilayer structure and having different yttrium oxide contents
Provided is a dental zirconia blank which has high transmittance, can reproduce a color tone close to that of natural teeth, and has intraoral tolerance strength. Also provided is a dental zirconia blank which has high strength and which can be produced even with a 4-unit or more prosthetic device. [Solution] A dental zirconia green body having a plurality of layers, the dental zirconia green body comprising: a first layer comprising a highly transmissive ceramic containing 91.6-96.5 mol% of zirconia and 3.5-8.4 mol% of yttrium oxide, and a second layer comprising a highly transmissive ceramic containing 91.6-96.5 mol% of zirconia and 3.5-8.4 mol% of yttrium oxide; and a second layer comprising a low-transmissivity ceramic containing 95.6 to 98.5 mol% of zirconium oxide and 1.5 to 4.4 mol% of yttrium oxide, said second layer comprising a low-transmissivity ceramic containing 95.6 to 98.5 mol% of zirconium oxide and 1.5 to 4.4 mol% of yttrium oxide. The yttrium oxide content of the low-transmissivity ceramic is 0.5-5.4 mol% less than the yttrium oxide content of the high-transmissivity ceramic, and the first layer is located at one end in the stacking direction of the plurality of layers.
本发明提供一种高透射性且能够再现接近于天然牙的色调并且具有口腔内耐受强度的牙科用氧化锆坯体。进一步地，提供一种具有高强度并且4单位以上的补缀装置也能够制作的牙科用氧化锆坯体。本发明的解决手段是一种牙科用氧化锆坯体，其具有复数的层，其包括：第一层，由高透射性陶瓷构成，该高透射性陶瓷含有91.6‑96.5mol％的氧化锆和3.5～8.4mol％的氧化钇；以及第二层，由低透射性陶瓷构成，该低透射性陶瓷含有95.6‑98.5mol％的氧化锆和1.5～4.4mol％的氧化钇。低透射性陶瓷的氧化钇的含有率比高透射性陶瓷的氧化钇的含有率少0.5‑5.4mol％，并且第一层位于复数的层的层叠方向的一端。
Zirconium oxide having multilayer structure and having different yttrium oxide contents
氧化钇含量不同的多层结构的氧化锆
AEBA RIEKO (author) / TAKAHASHI SHUHEI (author) / KITAMURA TOSHIO (author)
2023-12-08
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
A61K
Zubereitungen für medizinische, zahnärztliche oder kosmetische Zwecke
,
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
/
B32B
LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
,
Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse
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