Materials Flashcards
generally, why is a pregnant patients caries and erosion risk increased?
sugary diet
acid reflux
what does pregnancy increase the risk of, relating to oral health?
caries
erosion
periodontitis
mobility issues
when is the foetus most prone to teratogenic effects?
trimester 1
what trimester do you change patient position?
trimester 3
in trimester 3 patients how should they be seated?
supine
right hip elevated 10-12cm
5-15% tilt to left
why do we lay patient down in 3rd trimester?
prevent hypotension
why do you tilt patient to left during 3rd trimester?
avoid maternal vena cava and aorta compression
what acts as an interface between mother and foetus?
placental barrier
how does the placental barrier act as an interface?
gas exchange
transfer of nutrients and waste products
transfer immunity
secretion of hormones
what are the potential mechanisms of transfer across the placenta?
simple diffusion
molecular weight
lipid solubility
degree of ionisation
protein binding
what dental material should not be used on pregnant patients?
amalgam
how is mercury from amalgam uptook?
vapour - passive diffusion
methyl mercury - active transport by AA carriers
what is the concern around resin composites?
bisphenol A (BPA)
what is the issue with BPA?
endocrine disruption
mimics oestrogen
may cross placental barrier
