title: Thermal properties of dental materials--cavity liner and pulp capping agent.
abstract: 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.
authors.affiliation: Department of Dental Materials, Nihon University School of Dentistry, Tokyo, Japan. saito-ms2@dent.nihon-u.ac.jp
authors.forename: Masahiro
authors.initials: M
authors.lastname: Saitoh
authors.forename: Shigeyuki
authors.initials: S
authors.lastname: Masutani
authors.forename: Taishi
authors.initials: T
authors.lastname: Kojima
authors.forename: Masataka
authors.initials: M
authors.lastname: Saigoh
authors.forename: Hideharu
authors.initials: H
authors.lastname: Hirose
authors.forename: Minoru
authors.initials: M
authors.lastname: Nishiyama
mesh_terms: D000180:Acrylic Resins; D002057:Burns, Chemical / Q000517:prevention & control; D002126:Calcium Hydroxide; D002130:Calcium Phosphates; D003736:Dental Cavity Lining; D003764:Dental Materials; D003782:Dental Pulp / Q000293:injuries; D003785:Dental Pulp Capping; D006801:Humans; D006882:Hydroxyapatites; D008422:Materials Testing; D008903:Minerals; D009930:Organic Chemicals; D012822:Silicon Dioxide; D017550:Spectroscopy, Fourier Transform Infrared; D013814:Thermal Conductivity; D013816:Thermodynamics
chemical_list: D000180:Acrylic Resins; D002130:Calcium Phosphates; D003764:Dental Materials; D006882:Hydroxyapatites; D008903:Minerals; D009930:Organic Chemicals; C493639:cavios; C074672:Ultrablend; C025702:Dycal; D012822:Silicon Dioxide; C040408:Life (dental material); C020243:calcium phosphate; C061123:Cavalite; D002126:Calcium Hydroxide