Walton T R, O'Brien W J
J Dent Res. 1985 Mar;64(3):476-80. doi: 10.1177/00220345850640031801.
Cracking or rupturing, due to thermal stress, of porcelain bonded to a palladium-silver alloy indicated that porcelain-metal thermal compatibility was dependent on: the difference in thermal expansion coefficients of the porcelain and metal; the geometry and dimensions of the samples; and the porcelain-metal thickness ratio. A spherical configuration was more sensitive to thermal expansion coefficient differences than was a disc configuration. A higher incidence of cracking resulted from an increase in both specimen size and porcelain-metal thickness ratio.
由于热应力导致的与钯银合金结合的瓷层出现裂纹或破裂表明，瓷-金属热相容性取决于：瓷和金属的热膨胀系数差异；样品的几何形状和尺寸；以及瓷-金属厚度比。球形结构比盘形结构对热膨胀系数差异更敏感。样品尺寸和瓷-金属厚度比的增加都会导致更高的裂纹发生率。
