Unit 307- restorative Flashcards
class 1
fissures
class 2
two surfaces like mo
class 3
m or d of a incisor or canine
class 4
MI OR DI extended cavity
class 5
cervical margin
class 6
cusps/occlusal
what is a gingival margin trimmer
to trim margin of cavity
what is the effect cutting out a DO cavity and what do the tiny grooves do
dovetail effect
they provide adequate retention
what is an enamel chisel
remove any enamel from cavity
reasons for moisture control
-protect patient airway
-pt is comfortable
-good visibility
-allow materials to set
low speed suction name
saliva ejector
revolutions of high speed
500,000
revolutions of low speed
400,000
burs with diamond carbide surfaces are used for what
enamel, dentine, old fillings
contra angled and shank are used for what
caries, dentine, small on children
use of the type of burs round, pear, fissure
r-access to cavities
p-shaping
f-outlining
difference between slow speed and high speed burs
ss- latch grip
hs- friction grip
what is air abrasion
compressed air abrasive practices
zinc oxide and eugenol example
kalzinol
ad and dis and use of zinc phosphate
A-quick, hard, adhesive to dentine
D-moisture sensitive, irritants pulp due to it’s acidity
Use-temp fill, cavity base, luting cement
ad and dis and use of zinc oxide and eugenol
A-cheap, sedative to inflamed pulp
D-reacts with composites, burn soft tissues
Use-metalic fillings cavity base
what is a thin mix of zinc phosphate called and for
luting cement for crown cementation
ad and dis and use of zinc polycarboxylate
A-most adhesive cement to dentine
D-sticky to place
Use- cavity base, luting cement
what material is used for linings and what is it for
calcium hydroxide
protect the pulp from thermal and chemical shock, it kills bacteria
what is in a amalgam capsule
powered alloy silver copper and liquid mercury
disadvantages of calcium hydroxide
soluble in water
requires a base on top as it’s too thin
ad and dis of amalgam
A- easy to use, cheap, good strength, longevity
D-mercury is toxic, not retentive, thermal shocks, metal colour
large amalgam spill instructions
-PPE
-mercury absorbent paste(calcium hydroxide and sulphur with water)
-left to dry and cleaned with wet towel and placed in container
-risk assess
how does composite set
blue light which makes catalyst set
what is in acid etch
37% phosphoric acid
how much does the light penetrate composite
2mm
advantage and disadvantage of composite
A- colour, adhesive from etch and bond, strength in small, fast set, premixed
D- long procedure, expensive, can only use glass ionomer for base, moisture
what is unfilled resins
fissure sealant
what does glass ionomer capsule consist of
aluminosilicate and polyacrylic acid and water
ad and dis of GIC
A- adhesive, good for abrasion class 5 cavities, release fluoride
D- low strength, deep cavities require calcium hydroxide, moisture
what type of comp for anterior teeth
microfine
what classification would you use gi on
class 5
what is in comp that makes it its shade
inorganic filler
what would you use at the end for a deep cavity
spoon excavator
what is cermet
ceramic metal mixture
what two materials would you use on a crown core
cermet, hybrid comp
what is hybrid comp for teeth
posterior
universal comp uses on what teeth
both ant and post
name 4 components of comp
powdered glass, quartz, silica, ceramic particles
what is the resin base in comp called
bisphenol A-glycidyl methacrylate (BISGMA)
