Katsura H, Kaneko K, Kameda T, Tennichi T, Kuroki M
Shika Rikogaku Zasshi. 1975 May;16(35):138-43.
Using an equipment with sensitive vibretor-controller oscillater of elactrostatic drive system, we sought for the difference between elastic modulus of various kinds of dental porcelain and elastic modulus by firing method. We examined the relation between temperature of firing and elastic modulus as well. The obtained results are as follows: 1). Elastic modulus of low fusing porcelain of enamel color was 4.32 times 10(11) dyn/cm2 by air firing 3.95 approximately 4.63 times 10(11) dyn/cm2 by vacuum firing. Low fusing of porcelain of dentin color and the one of enamel color had the same elastic modulus. 2). Elastic modulas of high fusing porcelain of enamel color was 3.58 times 10(11) dyn/cm2 by air firing, 3.41 approximately 3.64 times 10(11) dyn/cm2 by vacuum firing. High fusing porcelain of dentin color and the one of enamel color were of the same elastic modulus. 3). Porcelain of opaque color for metal bond was 3.22 times 10(11) dyn/cm2 by air firing 3.97 approximately 4.22 times 10(11) dyn/cm2 by vacuum firing. When dentin color was added to opaque color elastic modulus was low (3.90 times 10(11) dyn/cm2). 4). Alumina porcelain of opaque color was 5.42 times 10(11) dyn/cm2 by air firing, 6.50 approximately 6.80 times 10(11) dyn/cm2 by vacuum firing. When dentin color was added to opaque color elastic modulus was very low (3.90 times 10(11) dyn/cm2). 5). Elastic modulus to various kinds porcelain changes according to temprature of fusing. And the highest elastic modulus is at the temperature which is 50 approximately 100 degrees C lower than final firing temperature.
我们使用一台配备静电驱动系统的灵敏振动控制器振荡器的设备，通过烧制方法探寻各类牙科陶瓷的弹性模量与弹性模量之间的差异。我们还研究了烧制温度与弹性模量之间的关系。所得结果如下：1）. 牙釉质颜色的低熔陶瓷在空气烧制时弹性模量为4.32×10¹¹达因/平方厘米，真空烧制时为3.95至4.63×10¹¹达因/平方厘米。牙本质颜色的低熔陶瓷与牙釉质颜色的低熔陶瓷具有相同的弹性模量。2）. 牙釉质颜色的高熔陶瓷在空气烧制时弹性模量为3.58×10¹¹达因/平方厘米，真空烧制时为3.41至3.64×10¹¹达因/平方厘米。牙本质颜色的高熔陶瓷与牙釉质颜色的高熔陶瓷具有相同的弹性模量。3）. 用于金属粘结的不透明颜色陶瓷在空气烧制时弹性模量为3.22×10¹¹达因/平方厘米，真空烧制时为3.97至4.22×10¹¹达因/平方厘米。当向不透明颜色中添加牙本质颜色时，弹性模量较低（3.90×10¹¹达因/平方厘米）。4）. 不透明颜色的氧化铝陶瓷在空气烧制时弹性模量为5.42×10¹¹达因/平方厘米，真空烧制时为6.50至6.80×10¹¹达因/平方厘米。当向不透明颜色中添加牙本质颜色时，弹性模量非常低（3.90×10¹¹达因/平方厘米）。5）. 各类陶瓷的弹性模量随烧制温度而变化。最高弹性模量出现在比最终烧制温度低50至100摄氏度的温度下。
