Saitoh Masahiro, Masutani Shigeyuki, Kojima Taishi, Saigoh Masataka, Hirose Hideharu, Nishiyama Minoru
Department of Dental Materials, Nihon University School of Dentistry, Tokyo, Japan.
Dent Mater J. 2004 Sep;23(3):399-405. doi: 10.4012/dmj.23.399.
We studied the thermal properties of cavity liners that included calcium phosphate as inorganic filler, in contrast to the conventional pulp capping agents. Therefore, thermal diffusivity, specific heat capacity, and thermal conductivity were measured. In addition, thermal conductivity results were compared with those of restorative materials and human dentin to examine thermal insulation effects. The thermal conductivity of cavity liners ranged from 0.23 to 0.28 W m(-1) K(-1), and that of pulp capping agents ranged from 0.44 to 0.48 W m(-1) K(-1). Test results indicated that the thermal conductivity of cavity liner was lower than those of human dentin, pulp capping agent, cast alloy, and composite resin for restoration, hence suggesting that cavity liner has a good thermal insulation effect.
与传统的盖髓剂相比，我们研究了含有磷酸钙作为无机填料的窝洞衬层材料的热性能。因此，我们测量了热扩散率、比热容和热导率。此外，将热导率结果与修复材料和人牙本质的结果进行比较，以检验隔热效果。窝洞衬层材料的热导率范围为0.23至0.28W m(-1) K(-1)，盖髓剂的热导率范围为0.44至0.48W m(-1) K(-1)。测试结果表明，窝洞衬层材料的热导率低于人牙本质、盖髓剂、铸造合金和用于修复的复合树脂，因此表明窝洞衬层材料具有良好的隔热效果。
