Please enable JavaScript.

Coggle requires JavaScript to display documents.

Biomaterials - Coggle Diagram

- - - - gives a negative likeness of the oral structure
      - allows a cast to be made from it
      - gives an accurate replica of the tissues
    - - should be able to flow and adapt to the tissues
      - should be viscous enough to retain in the tray
      - should have reasonable setting time
      - should not tear during removal
      - should remain dimesionally stable until cast is poured
      - should remain stable after cast pouring, so that more casts can be poured
      - should be biocompatible
      - should be cost-effective
    - - Conventional
        
        elastic
        
        reversible hydrocolloid
        
        agar
        
        sets by gelation
        
        induced through temp change
        
        liquefies at 70 - 100 C
        
        1 more item...
        
        formed from agar and water
        
        irreversible hydrocolloid
        
        alginate
        
        low cost
        
        easy to use
        
        good setting time
        
        enough to handle properly
        
        hydrophilic
        
        flexible and easy to remove
        
        deforms during removal
        
        dimensionally unstable
        
        shrinkage overtime
        
        absorb water
        
        elastomer
        
        polysulfide
        
        polyether
        
        hydrophilic
        
        very accurate
        
        good elastic recovery
        
        high tear strength
        
        have different viscosity available
        
        taste bitter
        
        more expensive
        
        addition silicone
        
        no by-product
        
        hydrophobic
        
        add surfactant to make surface hydrophilic
        
        latex gloves can contaminate the material
        
        has sulfur in it
        
        1 more item...
        
        good detail capture
        
        good properties
        
        can be poured several times
        
        doesn't need to be poured immediately
        
        vinyl polyether siloxane
        
        inelastic
        
        irreversible
        
        plaster of paris
        
        zinc oxide eugenol
        
        good dimensional stability
        
        minimal shrinkage
        
        captures detail well
        
        2 more items...
        
        inexpensive
        
        harder to handle
        
        can irritate the soft tissues
        
        reversible
        
        impression waxes
        
        impression compound
        
        thermoplastic
        
        reversible based on temperature
      - Digital
        
        Direct
        
        Indirect
        
        advantages
        
        real-time evaluation
        
        easy to manipulate images
        
        no need for physical storage
        
        easy communication with the dtech
        
        easier to choose shade
        
        disadvantages
        
        expensive initial cost
        
        steep learning curve
        
        must follow manufactures scanning patterns
        
        difficult to capture occlusion interaction
        
        several different closed systems
        
        edentulous arches
        
        doesnt move the soft tissue to see full displacement available.