Shade Assessment Flashcards
Aesthetic restoration - factors to take into account
Shape Aesthetic Colour Surface texture Translucency
Communicating shape
Tricky if?
Use adjacent teeth –> mirror image
Adjacent teeth not present
Use DIAGNOSTIC WAX UP
IMPRESSIONS if poss before prep
Diagnostic wax up allows for
Shape and aesthetics
Tooth reduction
Occlusal contacts present
OVD - occlusal vertical dimension
Communicating colour - methods
Subjective shade assessment
Objective shade assessment
Objective shade assessment
Issues with colourimetry
Uses technology
Colorimeter
Changing translucency, staining
Subjective assessment i.e
Colour perceived is determined by
Complications
Shade taking
Illuminant - varies
Object
Observer
Lighting conditions Distracting strong colours Colour variation within individual tooth Translucency variation Surface reflection Individual colour perception
Colour and translucency variation
Surface reflections
Has to be taken into account
Have to change new surface to match surroundings - shade above or below as long as shape and finish are correct
Describing colour - systems
Chroma
Munsell system
Hue - colour family - stays the same
Chroma - colour saturation - e.g with tea increases with brewing
Value
Colour space
Gives dimension to colour
Can plot hue, chroma and value
3D shade guide
Best method
Equal distribution
Logical sequence
Remove main hue changes
Communicating translucency
Picture in ICP
Picture in space
Shade taking tips
Hydrated teeth
Switch off operating light
Corrected light
Multiple opinions and work quickly
Lab comms
Planning wax up
Patient coms
Pre-op impression
Pre-op impression Working impression Opposing impression Inter-occlusal record Lab card Shade - shape translucency and shade guide
