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DENTAL MATERIAL

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Dental materials Mind Map on DENTAL MATERIAL, created by aahughes on 03/24/2014.
aahughes
Mind Map by aahughes, updated more than 1 year ago
aahughes
Created by aahughes over 8 years ago
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Resource summary

DENTAL MATERIAL
  1. DENTAL COMPOSITES: fill material and sp tray
    1. Consits of: RESIN, FILLER, COUPLING AGENT
    2. FIBRE REINFORCED MATERIALS:type of composite
      1. consits of: FIBRES OF HIGH STRENGTH AND MODULUS
        1. EMBEDDED IN A BONDED MATRIX
          1. TESTS USED TO CHARACTERISE MATERIALS
            1. TENSILE = for applied to elongate rod
              1. COMPRESSIVE = force applied, not recommended for brittle materials
                1. DIAMETRAL TENSILE STRENGTH = for brittle mat where conventional tensile n/a
                  1. FLEXURAL = determines how material bends (3points)
                    1. VICKERS,BRINELL,KNOOP = surface hardness test
                      1. Large num - low hardness, small num - high hardness
                        1. SHEAR BOND STRENGTH = adhesive failure. Pebdulum swing #'s specimen
                          1. SURFACE ROUGHNESS = Profilometer asses surface characteristics
                            1. THERMAL PROPERTIES = thermal conductivity (K) rate of heat transfer
                            2. RHEOLOGICAL PROPERTIES
                              1. Study of the flow of materials
                                1. ie Luting cement , flowable comp
                                  1. Study of VISCOSITY and how it vaaries with rate of shear and time
                                    1. DILATANT: viscosity INCREASES with applied pressure
                                      1. NEWTONIAN: viscosity remains CONSTANT with applied pressure
                                        1. PSEUDOPLASTIC= viscosity DECREASES with applied pressure
                                        2. CHEMICAL PROPERTIES - CORROSION
                                          1. Chemical reactivity of metals and alloys
                                            1. An electrolytic property
                                              1. Should dispaly good corrosion resistance
                                              2. BIOLOGICAL PROPERTIES
                                                1. lab screening, in vivo test, human randomised cotrolled trial
                                                  1. Ideal material - non toxic, non irritant to the pulp, non cariogenic
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