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引用次数: 0
摘要
测定了人牙和部分牙水泥的热性能(热扩散率和热导率)。同时测量全金属冠修复前后牙髓腔温度的变化。讨论了牙水泥的隔热性能。牙本质、牙釉质和牙水泥的热扩散率分别为2.04 × 10(-3)、3.22 × 10(-3)和0.99 ~ 1.87 × 10(-3) cm2/sec。导热系数分别为1.36 x 10(-3)、1.84 x 10(-3)和0.50-1.51 x 10(-3) cal/ ccm .sec.℃。牙冠下牙水泥对牙髓的热冲击有一定的隔热作用，并且随着牙水泥的热扩散率和热导率的降低，牙水泥的隔热效率有所提高。
[Thermal properties of human teeth and dental cements].
The thermal properties (thermal diffusivity and thermal conductivity) of human teeth and some dental cements were measured. The temperature change at the pulp cavity was also measured before and after the restoration with the full metal crown. The thermal insulating efficiency of dental cement was discussed. The thermal diffusivity of human dentin, enamel and dental cements was 2.04 x 10(-3), 3.22 x 10(-3), and 0.99-1.87 x 10(-3) cm2/sec, respectively. The thermal conductivity was 1.36 x 10(-3), 1.84 x 10(-3), and 0.50-1.51 x 10(-3) cal/cm.sec.degrees C, respectively. The dental cement beneath the crown insulated the thermal shock to dental pulp and the thermal insulating efficiency was increased with the decrease in the thermal diffusivity and thermal conductivity of dental cement.
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