Day 1 Lecture 1 Flashcards
Operative Dentistry
The science and art in Dentistry that studies the prevention, diagnosis and treatment of defects/disease in the enamel and dentin.
Carious
Bacterial infection, removal of tissue, precise cavity prep.
Non-carious
Loss due to chemical or mechanical abrasion. Attrition, abrasion, erosion, abfraction
Attrition
Breakdown from pressure
Abfraction
Angular notch caused by bending of tooth
Direct Restoration
Soft material placed then hardened.
Indirect Restoration
Formed outside body then cemented or bonded to tooth
Airdriven vs. Electric
Volume, higher power, less stalling
Slow speed
12000 RPM, no water coolant, close to pulp removal, surface polishing and finishing.
Medium Speed
12-20 thousand
High Speed
> 200000, needs water coolant, most cutting.
Most common connector line
4 hole
Slight angle
Contrangled
Base of hand piece
coupler
Push button
One chuck mechanism
Nose cone
Straight attachment, slow speed, extraoral work, long shank type bur, straight bur.
2 latch type head
Swing latch
Friction Grip head
Slow speed, push/screw
Rotary Cutting Instruments 3 components
Head neck shank
3 types of rotary instruments
Bladed, Diamond (abrasive), Other (?)
Tapered neck - why
Visibility
Bladed instruments
Excavating, Finishing
Finishing burs
10-30 blades - 10-12 red, 16-20 yellow, 30 white
Excavating/cutting burs
6-8 blades
Blade cutting composition/use
Tungsten carbide, intracoronal prep
Diamond for abrasive cutting
metal blank with diamond for extracoronal preps.