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在现代牙科学领域中,尽管复合材料的修复占有重要地位,但是对复合材料的热传性能的细致研究,相对来说几乎没有。目前,一系列复合材料的使用,有效地提供了评价的机会,通过评价可以预测某种组成的新材料的性质。继Braden的开创性研究以后,就选定了热扩散率作为确定防止牙髓遭受热刺激重要的瞬态热参数,这个参量对于断定修复体对瞬态的温度刺激的瞬态热应变反应的性质也同样具有重要意义。本文提出和探讨了一组有代表性的复合材料数据。材料和方法试样准备:所研究的材料见表。试样为圆柱状,直径0.5cm,高0.5cm,其内部埋入铬铝温差电偶计的子。在试验前24小时,将试样置于37℃
In the field of modern dentistry, although the repair of composite materials occupies an important position, the detailed study on the heat transfer properties of composite materials is relatively few. At present, the use of a series of composite materials effectively provides an opportunity for evaluation by which properties of a new material of a certain composition can be predicted. Following Braden's seminal study, thermal diffusivity was chosen as an important transient thermal parameter to determine the extent to which tooth pulp was exposed to thermal stimuli, a parameter that determines the transient thermal strain response of the restoration to transient temperature stimuli It is also of great significance. This article presents and explores a representative set of composite data. Materials and methods Sample preparation: The materials studied are shown in the table. The sample was cylindrical, 0.5cm in diameter and 0.5cm in height, embedded in the chrome-aluminum thermocouple meter. 24 hours prior to testing, the sample was placed at 37 ° C