D1 Quiz 1 Continued Flashcards
Almagam Well
mix in
Articulating Paper Forcep
spins
4/5
Cleoid Discoid
Half Hollenback Carver
Rounded, longer, sharp end
Composite Resin Placement Instrument
Plastic Filling Instrument
Novatech Spatula and blade
2 ended with spatula
13/14
Mccall Scaler
Rounded bladed end
Spoon Excavater
Electric Rotary RPM; torque
200,000 max; increased torque; no slowing as load increases
Air Driven RPM and torque
400,000 max; decreased torque as load goes up
Air Abrasion use
less invasive
Drills Synomyn
Dental Handpieces
One component device
High Speed
Two component device
Slow speed handpiece
Better Tactile (slow or fast)
slow-vibrates
Higher Toque
Slow
Uses of slow speed
finishing/polishing
To remove caries close to pulp
Slow speed
Latch grip
slow speed-finishing
Friction grip
Both speeds
Cut enamel, dentin, and remove old restorations
High sped
Carbide
Blade Cutting-brittle fractures;end cutting; low heat
Diamond
Abrasive Cutting-more effective for intracoronal and extracoronal tooth prep, beveling enamel marginsm and enamelplasty
better for end cutting
Carbide
Lower heat
carbide
Shear off
Carbide
Abrade away
(scratching) Diamonds
Effectiveness
amt. of structure removed per unit of time
Efficiency
amt of energy utilized in cutting, not wasted as heat or vibration
Efficiency increases with
higher speeds and lighter pressure and air water
Concentricity
symmetry of bur-no wobble
Run out
bur head not symmetrical
How carbide burs are made
Sintering
Ball shaped Carbide
Round
Upside down pyramid carbide
inverted cone
cut tip shape carbide
pear shaped
Long barrel like-cylindrical
Straight fissure
Long push pop like (top narrower than base)
Tapered fissure
Bur that removes decay
round
Flatten floors and produce undercut
inverted cone
amalgam an composite prep-versatile
pear shaped
Spaces between blades
Flutes
Each blade has
2 sides (Rake and clearance)
Each bur has
Three angles (Rake, Edge, Clearance)
Most important design of Bur
Rake Angle
Negative Angle
Most important-allows burr to sweep but not dig-rake face ahead of radius from cutting angle to axis of burr
clearance angle
behind the rake angle, increased allows less friction
Spiral blades
increase cutting efficiency at high speeds
Cross cut blade
Increase cutting at low speeds
Number of blades
larger gives smooth at lower speeds
Flutes
increase efficiency by removing debris
Bur with rounded-wheel like end
wheel
looks like a flame
flame
pointed oval bur
oval
more efficient and longer lasting bur type
diamond
Can be made smaller
Carbides
looks like wheel but with rounded edges
donut burr
Hold burr at what angle to block
Perpendicular