Yellow And Blue Books Flashcards
When shouldn’t we use a eugenol lining?
With composite as it plasticises the resin base
What are the benefits of calcium hydroxide lining?
Remineralise remaining altered dentine
Stimulate odontoblasts to make reparative dentine
What are the advantages of a GIC lining?
Naturally adheres
Fluoride
Command set
Bonds to overlying composite
What happens if you over etch dentine?
Pulpal inflammation and pain
What are the functions of a matrix band?
Forms the missing wall of the tooth
Helps restore contact point
Permits close adaption of the amalgam to the cervical margin of the tooth using wooden wedges
Which way should the latch be engaged on a siqveland matrix band?
Gingivally
What is the palodent matrix system?
Used in composite class 2 Small bit of foil held in place by bitine ring
What are the benefits of a chamfer finish?
Seen readily
Resists distortion
Reasonable adaption to finish line at tooth margin
What angle is a chamfer?
135
What’s the maximum taper acceptable on crowd walls?
5 degrees
What is trim?
High molecular weight resin
Consists of poly ISO butyl methacrylate
Lines a crown
What is temp bond?
Luting zinc oxide eugenol
Remove excess after set
Discuss toffelmire matrix bands?
Allows band to be removed from holder
Boomerang shape adopts flare of tooth
Where should the open end of a toffelmire be?
Facing gingival tissues, to allow the holder to be separately removed
Describe an automatrix
Adjustable stainless steel band that can be tightened using a hand wrench
Taper to create anatomy
After amalgam insertion, band can be removed by cutting
Describe copper bands
Wide range of diameters but standard height
Adapted with rotary instruments
Not flared
Can’t easily be adjusted to create a snug fit
Thicker so poor contact point
Can be left in situ
What is GIC conditioner?
10% poly acrylic
Removes smear layer and improves bond strength
Which etch do we use with compomers?
Maleic and polyacrylic acid
What are the advantages of bevelling the enamel margins?
Provides a large sa for bonding
Reduces the amount of microleakage
Cross cuts the prisms and gives better etch pattern
Blends composite into the surrounding tooth tissue
What are the disadvantages of bevelling?
Damage to the adjacent tooth
Lacerated the gingiva and rubber dam
Increased cavity size
What types of mirrors are there?
Plain vs magnified
Front surface reflecting vs rear
What are the uses of a dental mirror?
Retracting soft tissues Protecting tissues Indirect vision Reflecting light Trans-illumination
What are the uses of a probe?
Diagnosis
Removing plaque
Checking dentine in cavity
Checking restoration margins
What are the types of probes?
Straight
Perio
Briault
What’s the difference between a discoid and spoon excavator?
Discoid has flat upper surface whilst spoon is concave
What are the uses of flat plastics?
Transfer and shape dental cements or restorative material where a pressure is not required to condense
How can we tell the difference between a wards cared and a half hollenbach?
Wards is is slimmer and pointer with a flat plastic on the other end
Describe an airotor
400 000 rpm
Less torque
Water spray
Friction grip burs
Describe a low speed handpiece
Contra angled or straight High torque Max 40 000 rpm, usually 3-4000 Normally withou water Latch grip burs
