DIAN Flashcards
pros and cons of alginate
pros - easy to use, can alter working time, cheap, hydrophilic
cons - poor dimensional stability due to syneresis and imbibition of water, low tear resistance
what are addition silicones also known as
polyvinylsiloxane
pros and cons of PVS
pros - range of viscosities available, good surface detail reproduction, good tear strength, low setting shrinkage, good dimensional stability, good elasticity (good for undercuts)
cons - hydrophobic (moisture will reduce accuracy), expensive
pros and cons of polyether
pros - accurate, low setting shrinkage, hydrophillic, good surface detail reproduction, good dimensional stability, good elastic recovery
cons - occasional allergies, expensive, bad taste, adheres to clothing, rigid so can be difficult to remove
compare CoCr and acrylic as denture bases
cost - acrylic cheaper
strength - CoCr stronger
Comfort - CoCr thinner, acrylic less thermal conductivity
Retention - CoCr more accurate fit and can incorporate clasps into structure
Addition - acrylic easy to add to
Support - acrylic more palatal support
what strength of toothpaste should a child under 3 use
standard caries risk
1000
what strength of toothpaste should a child under 3 use
high caries risk
1350-1500ppm
what strength of toothpaste should a child age 11 use if high caries risk
2800ppm
(prescribed)
age 10+
what strength of toothpaste should a 16 year old at high risk of caries use
5000ppm prescribed
(16+)
fluoride varnish volume for primary, mixed and permanent dentition
primary - 0.25
mixed - 0.4
permanent - 0.75
(ml)
instructions after applying fluoride varnish
no eating or drinking for 30 mins
contraindications to fluoride varnish
severe asthma
allergy to colophony (elastoplast)
ulcerative gingivitis
