Enamel Flashcards
what is the hardest tissue in the body
enamel
where in the tooth is enamel the thickest
incisal/ cuspal regions
where is enamel most mineralised and therefore hardest
surface
decreases towards the cervical region
where do you find enamel rods/ prisms
running perpendicular to the EDJ
what is contained within enamel rods
hydroxyapatite crystals at various orientations
striae of retzius
run obliquely from EDJ to enamel surface
represent periods of enamel formation
what do the horizontal bandings on enamel prisms represent
daily amount of tissue formed
filliform papillae
most numerous papillae on tongue
give tongue its texture and ability to sense touch
fungiform papillae
contain taste buds
vallate papillae
largest , found at back of tongue
surrounded by cleft that contains von ebner glands
von ebner glands
secrete serous fluid into cleft surrounding vallate papillae to facilitate taste
conditioned response of increasing salivary flow
visual and auditory stimuli
what is meant by the two stage mechanism of saliva secretion
primary secretion by acini cells
secondary modification by striated ducts
what region of the mouth sees more calculus formation and why
lower as to form calculus plaque must be mineralised which requires calcium phosphate from saliva and saliva flow is greatest in lower region of the mouth
