Dental Materials

Question 1

Liners,bases, and temp. Fillings.

Answer 1

Calcium hydroxide - promotes reparative dentin growth (tertiary)
Zinc oxide and eugenol - sedative temporary filling when mixed to a putty like consistency because it has a sedative effect on the pulp.
Glass ionomer - can be used as a liner under any type of restoration. Excellent benefits of high strength glass ionomer: it helps prevent secondary decay by the continues release of fluoride. It provides a protective insulation to the pulp. It has low solubility in saliva.

Question 2

Zinc phosphate

Answer 2

To help minimize irritationto the pulp, zinc phosphate cement is properly mixed on a cool glass slab by adding small increments of powder to the liquid and using a large area and a wide sweeping motion with long strokes to mix the powder into the liquid. Wrist movement.

Question 3

Glass ionomer

Answer 3

Releases fluoride and helps prevent secondary decay

Question 4

Types of impression trays:

Answer 4

For alginate impressions use perforated or rim-locked trays

Question 5

Positive reproduction

Answer 5

Model made of gypsum product

Question 6

Negative reproduction

Answer 6

An impression

Question 7

Regular-body polysulfide -

Answer 7

may be used for a final impression in a custom tray ( most commonly used for dentures

Question 8

Light-body polysulfide

Answer 8

Is syringes into the prepared area of the arch