Watts D C, el Mowafy O M, Grant A A
J Dent Res. 1987 Jan;66(1):29-32. doi: 10.1177/00220345870660010601.
The effect of temperature on compressive stress/strain behavior of human dentin obtained from recently extracted permanent lower molar teeth has been determined over the range 0-80 degrees C. Dentin specimens were loaded uni-axially in a direction perpendicular to the tubule orientation. A statistically significant, linear regression relationship was found between modulus (E) and temperature (T): E (GPa) = 15.55-0.0734 . (T degrees C). The observed temperature coefficient of the modulus is in close agreement with that observed for cortical bone. Proportional limit, compressive strength, and resilience were also found to undergo a linear decrease with increasing temperature. Mechanical failure of specimens generally occurred along lines determined by maximum shear stresses, approximately 45 degrees to the axial load direction.
已测定了温度在0至80摄氏度范围内对从近期拔除的恒下磨牙获取的人牙本质抗压应力/应变行为的影响。牙本质标本在与小管方向垂直的方向上进行单轴加载。发现模量（E）与温度（T）之间存在统计学上显著的线性回归关系：E（吉帕斯卡）= 15.55 - 0.0734×（T摄氏度）。观察到的模量温度系数与皮质骨的观察结果密切一致。还发现比例极限、抗压强度和弹性随着温度升高呈线性下降。标本的机械失效通常沿着由最大剪应力确定的线发生，与轴向载荷方向大约成45度角。
