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Index of Refraction

The index of refraction for any substance is the ratio of the velocity of light in a vacuum to its velocity in the substance.

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                         Extraordinary         Ordinary
                           index of            index of
Material                   refraction         refraction     Ref.
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Filler particles for
    dental composites
  Barium borosilicate                            1.554        158
  Quartz                                         1.540        158
  Strontium glass                                1.550        158
  Ytterbium trifluoride                          1.530        158
  Zirconium glass                                1.520        158
Fluorapatite, synthetic       1.630              1.633        103
Hydroxyapatite, synthetic     1.643              1.649        104
Monomers
  Bisphenol-A-glycidyl 
    dimethacrylate                               1.545        168
  2-Hydroxyethyl methacrylate                    1.448        168
  Triethyleneglycol dimethacylate                1.457        168
  Urethane dimethacrylate                        1.481        168
Porcelain, feldspathic                           1.504        147
Quartz                                           1.544        147
Tooth structure, enamel                          1.655        105
Water                                            1.333          1
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Introduction to Biomaterials Properties | Biomaterials Properties Table Listing |
References (1-100) | References (101-200) | References (201-244) |

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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/Indref.html

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