PROBLEM TO BE SOLVED: To provide a dental prosthesis comprising a zirconia frame in which fracture toughness is improved and the generation of cracks are suppressed.SOLUTION: The dental prosthetic comprises a substrate and porcelain, the substrate comprising zirconia, the coefficient of thermal expansion after firing the porcelain being lower than the coefficient of thermal expansion of the zirconia sintered body, with the difference between the coefficient of thermal expansion of the zirconia sintered body and the coefficient of thermal expansion after firing the porcelain being 1.0×10/°C to 3.5×10/°C, and the thickness of the porcelain after firing being 10-500 μm.SELECTED DRAWING: None【課題】破壊靭性が向上し、クラックの発生が抑制された、ジルコニアで形成されたフレームを含む歯科用補綴物を提供する。【解決手段】基材と陶材を含む歯科用補綴物であって、前記基材がジルコニアを含み、前記陶材の焼成後の熱膨張係数が、前記ジルコニア焼結体の熱膨張係数より低く、前記ジルコニア焼結体の熱膨張係数と前記陶材の焼成後の熱膨張係数の差が１．０×１０-6／℃～３．５×１０-6／℃であり、前記陶材の焼成後の厚さが１０～５００μｍであることを特徴とする、歯科用補綴物。【選択図】なし
