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