Tooth Surface Loss Flashcards
what is erosion?
the loss of enamel and dentine primarily from attack other than those chemicals produced intraorally by bacteria.
what is dentine hypersensitivity? 4
loss of enamel exposing dentine
dentine is tubular so liquids go into tubules
picked up by nerves in the pulp
hot/cold sensitivity
what is the rim of confidence?
the enamel goes but there is a rim of enamel at the edge of the tooth
what is sub-margination?
filling is higher up than the tooth as tooth has eroded around it but filling has not
teeth are weaker due to erosion which causes ?
chipping
tooth exposure to acids come from? 2
the diet (fizzy drinks)
gastrointestinal tract (GIT)
Acid diffuses from the ? and ? upon the tooth surface. It then has to penetrate the ? or ? coating of individual ? ? that make up the enamel tooth substance
plaque
pellicle
protein
lipid
hydroxyapatite crystals
how is hydroxyapatite not perfect?
it has substitutions
which make it more acid soluble than pure
why is dentine more acid soluble than enamel? 3
smaller crystals
higher surface area per gram
more carbonate
mode of attack of an acid is to? 2
dissolve by combining with carbonate/phosphate ion (direct surface etching)
Form a complex with calcium to remove calcium from the lattice (surface softening)
how does acid come up into the mouth?
vomiting
regurgitation
gastroesophageal reflux
rumination
how does saliva modify the erosion process? 4
dilutes and clears fluid
neutralisation and buffer
assists in acquired pellicle formation
provision of Ca, phosphate and fluoride for remineralisation
how does dental anatomy and occlusion modify the erosion process? 2
tooth prominence in relation to drinking
occlusion causing abfraction -> more susceptible tooth surface
what is abfraction?
when teeth together, flexural forces at the gum margin cause chipping of tooth substance
how does soft tissue anatomy and physiological function modify the erosion process?
influence areas acid contacts
influence how acid moves through the mouth
where is the most sever erosion normally found in the mouth?
palatal surface of teeth as the tongue has an abrasive action on softened surface
where is it rare to find erosion in the mouth?
lingual surfaces of lower incisors
why is noticing erosion as a dentist important?
may be the first sign to a healthcare professional that the patient is not well
what is anorexia nervosa?
aversion to food leading to severe weight loss
what is Bulimia nervosa?
recurrent episodes of binge eating followed by inappropriate behaviours to avoid weight gain
what are binge eating disorders?
binge eat to excess but demonstrate no compensatory behaviour to avoid weight gain
GORD (gastro oesophageal reflux disease) causes? 4
Oesophagitis
Barretts epithelium
Oesophageal adenocarcinoma
Aspirational pneumonitis
