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Thermal Conductivity

The thermal conductivity of a substance is the quantity of heat in cal/sec passing through a body 1 cm thick with a cross section of 1 sq. cm when the temperature difference between the hot and cold sides of the body is 1 deg. C.

_________________________________________________________________

                                       Thermal conductivity
                                           [mcal/(sec)
Material                    Product    (sq. cm)(deg. C/cm)]  Ref.
_________________________________________________________________

Amalgam                                         54.0          192
Alumina (recrystallized)                        38.7           20
Bones
  Cancellous                                     1.4          192
  Cortical                                       1.4          192
Cement (base consistency)
  Zinc phosphate            Tenacin              3.1           13
Cements (luting consistency)
  Glass-ionomer             Ketac-cem            1.5*         205
  Zinc phosphate            Tenacin              2.5           13
Cements (liners)
  Calcium hydroxide         Dycal                1.5          206
                            Life                 1.2          206
  Glass-ionomer             Base cement          1.6*         205
                            Dentin cement        1.3*         205
  Unmodified ZOE                                 1.4#          24
                            Cavitec              0.7          206
Denture resins
  Acrylic                                        0.37          82
  Polystyrene                                    0.22          82
Gold alloy
  Au-Ag-Pd alloy                               300            192
Gypsum                                           3.1          147
Hydroxyapatite                                   3.0          192
Impression materials (polymerized)
  Polyether                 Impregum             2.3          207
  Silicone, addition        Baysilex             1.0          207
                            Provil
                              medium             1.4          207
                              high               0.72         207
Mercury                                         19.6$         130
Porcelain (feldspathic)                          2.39          20
Pure metals
  Chromium                                     160**          130
  Copper                                       941**          130
  Gold                                         710**          130
  Nickel                                       220##          130
  Palladium                                   1680$$          130
  Platinum                                     165***         130
  Silver                                      1000$           130
  Titanium                                      10.0          192
  Zinc                                         270##          130
Restorative materials
  Acrylic                  Bonfil                0.38          24
  Composite resin          Adaptic               2.61          24
                                                 3.27         109
Silicate                    Improved Filling
                              Porcelain       1.78-1.86        13
                                                 0.82#         24
Tooth structures
  Dentin                                         1.36          41
  Enamel                                         2.23          41
Vitreous carbon                                 15            117
Water                                            1.42***        1
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*    Powder/liquid ratio, 1.0 g/ml.
#    Powder/liquid ratio, 3.0 g/ml.
$    At 0 deg. C.
**   Near 20 deg. C.
##   At 25 deg. C.
$$   At 18 deg. C.
***  At 17 deg. C.

Introduction to Biomaterials Properties | Biomaterials Properties Table Listing |
References (1-100) | References (101-200) | References (201-244) |

Revised April, 1996
Biomaterials Properties Database, University of Michigan
Contact: Dr William J. O'Brien, Director (FAX: 313-647-5293).
Copyright © Quintessence Publishing, 1996.

http://www.lib.umich.edu/dentlib/Dental_tables/Thermcond.html

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