Unit 2 - Dental Handpeices & Accessories
what is a Bur?
A sharp roational instrument meant to cut tooth surfaces with its head.
How many types of Burs are there?
There are 8:
Round, inverted cone, straight fissure plain cut, straight fissue cross-cut, tapered fissure plain cut, tapered fissure cross cut, pear, and end cutting.
Name all types of dental unit Handpieces:
1. High speed
2. Low speed
3. Ultra sonic Scalar
4. Lazer
5. Air abrasion
6. Laboratory
7. Electric
how should you maintain the handpieces?
by the Manufacturer's instructions
What is a Rheostat?
A foot operated device that controlled the speed on the dental handpieces.
What is a High-speed handpiece?
Used for restorative procedures.
Has no attachments, has water-cooling system, uses Friction-grip burs, 450,000rpm
What is a Low-speed handpiece? Name all attachments.
kinda use it for anything and everything. But mostly polishing and trimming
10-40,000rpms
3 basic attachments:
1. straight 2. Contra-angle 3. Prophy
What is an Ultra-sonic scaler?
Use electircal energy of water and sound vibrations to create a pulsation effect.
Removes tartar and ortho binding material
What is the Lazer handpiece?
Uses a lazer to vaporize decay.
It has a watercooling system and is generally painless, however the procedure does take longer.
What is an Air-abrasion handpiece?
A high pressure "sandblaster". Delivers aluminum-oxide thriugh a small probe. no need for anesthesia. Lots of prep prior to procedure.
What is a Laboratory handpiece?
Used in dental labs for various grinding and polishing procedures. Can withstand heavier pressure.
What is an Electric handpiece?
Can be used as both a High-speed and a low-speed handpiece. but without sound, vibration or air.
What is a Central Air Compressor?
A machine that creates high-quality, high-pressure air, which is then delivered through specialized lines to dental instruments for use.
What is a Central Vacuum Compressor?
Is similar to an Air compressor, but instead it provides suction to each dental unit.
What is a Dental Radiography Unit?
Used with low levels of radiation to capture images of the interior of teeth and gums.
What is a View Box?
the view box allows images capruted by the radiography unit to be seen for evaluation.
What is an Amalgamator?
Used to triturate(mix) dental materials by vigorously shaking.
3 reasons we must maintain the equipment?
1. To provent cross-contamination
2. Function properly
3. Maintain appearance
Describe the Prophy-angle attachment.
Used for polishing💅. Holds the Prophy cup and bristle brush.(prophy head)
Describe the Contra-angle attachment?
Easy intraoral access and adapts to the tooth surface well. for soft decay, polish, and removing stains. (latch bur)
Describe the straight attachment.
For lab procedures, and recontoring dentures/retainers.
what are the components of the Dental units?
irrigation system, handpieces, evacuations
what are the different delivery systems?
front, side, and rear
What are reasons for biofilm in waterlines?
slow tubes, stangnant tubes, suck back, heated water
methods to reduce bacteria in waterlines:
1. Self-contained reservoirs
2. Microfiltration Cartrige
3. Chemical agents
biofilm
slim-producing bacteria that have fungi, algae, ans protozoa