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→Extrinsic Staining
Line 22:
Line 22:
'''Gingival haemorrhage''': green from breakdown of haemoglobin into green biliverdin
−'''Crown fragments''': less translucent due to dehydration of the fragment
'''Foods''': charcoal biscuits can penetrate pits and fissures in the enamel, green from foods containing abundant chlorophyll.
'''Foods''': charcoal biscuits can penetrate pits and fissures in the enamel, green from foods containing abundant chlorophyll.
−'''Dental restorative materials''': black-grey from amalgam
+'''Dental restorative materials''': black-grey from amalgam (rare in animals)
−'''Medications''': black from products containing iron or iodide, yellow-brown from products containing sulfide or silver nitrate, green from products containing copper or nickel, golden brown from products containing cadmium.
+'''Medications''': most commonly tetracyclines given prior to development of the permanent teeth.
'''Metal''': wear from chewing on cages or from removed endodontic bands or wires
'''Metal''': wear from chewing on cages or from removed endodontic bands or wires
−'''Discoloured restorations'''
'''Discoloured restorations'''