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What is Beading Wax?
It extends the impression tray, protects soft tissues, and hold the materials in the tray.
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What is Stop Wax?
It is to buffer the cusp from impinging.
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What is Agar made?
Seaweed
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How does agar set?
Thermoplastically (physical reaction)
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What kind of tray do you use with agar?
water cooled tray
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How do you store agar?
Limit it to 30 min at 100% relative humidity.
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Why do you remove impressions with a "snap"?
To MIN deformation, to MAX strength.
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Is agar reversible or irreversible?
Reversible
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Alginate reversible or irreversible?
Irreversible
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How does Alginate set up?
Chemically via Gellation
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What kind of trays do you use with alginate?
perforated trays
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What is alginate made from?
kelp
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When should training be used? (Safety)
- For all new employees
- When a new hazardous material is obtained
- Whenever safety procedures are modified
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What is MSDS?
- Material, Safety, Data, Sheets
- Product information
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When do you label materials?
Whenever transferring materials to a different container.
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What should be on a label?
- The name, date, contents
- If hazardous make a xeroxed copy of the original label
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What is OSHA?
- Occupational Safety and Health Administration
- They are part of the US department of labor
- They have a control program and hazard communications regulations.
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What is EPA?
- Environmental Protection Agency
- They deal with issues regarding the environment
- EPA and State medical tracking regulations
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Does wax have a melting point?
No, they have a melting range.
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Describe thermal expansion of wax?
Waxes have high coefficient of thermal expansion, uniform cooling is important.
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What is pattern waxes?
They are used to create a model (inlay, casting, baseplate)
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What is Processing waxes?
- They are used in dental procedures
- Boxes in the impression trays
- Records position of the teeth in occlusion
- Attach 2 different objects together
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What does wax do at relatively low temperatures?
Distorts; it is easily deformed.
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Pattern Wax Inlays
Fabricate wax patterns of crowns, bridges, inlays, etc..wax is melted and then poured into a die prep.
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Pattern Casting Wax
Forms wax patterns for metal framework of partials and full dentures.
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Pattern Wax Baseplate
Builds contours of a denture and holds denture teeth in position; also used for spacers.
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What is a dental implant?
An artificial replacement of teeth that are permanently affixed into the alveolar bone via biomedical device.
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What does Inert mean?
Do not react chemically
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What is Osseointegration?
Apparent direct attachment of osseous tissue to an inert material without intervening connecting tissue.
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Endosseous means what?
Into the bone (80%). Metal screw or cylinder fixtures anchor to bone and eventually implants fuse to bone via osseointegration.
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Who makes our masks?
NIOSH
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What does NIOSH stand for?
National Institute for Occupation Safety and Health
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What What type of implant is Subperiosteal?
- Below the periosteum but above the bone. Implant fixtures are positioned on bone surface and held in place by connective tissue.
- Only used for over dentures.
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Which type of implant is done through the bone?
Transosteal
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What are the parts of a dental implant?
- Implant
- Abutment
- Superstructure
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What is a metallic post attached to the implant so a restoration can be placed over it?
Abutment
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What is a prosthetic replacement that is affixed to the abutment or a removable replacement tooth?
Superstructure
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What type of implant goes through the root canal?
Endodontic
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How do you prevent distortion with wax?
- Uniform temperature
- Positive pressure while cooling
- No over manipulation
- Warm, not hot temperature for softening
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