Exam 16: Gypsum and Wax Products

Which of the following gypsum products is ideal for making full or partial denture models,orthodontic models,and casts requiring higher strength and abrasive resistance?

As the temperature of the wax increases,the _____ of the wax decreases until the wax becomes a liquid.

Which of the following is true regarding trimming of models with a model trimmer?

Which of the following is true of the double-pour method for fabricating and trimming diagnostic/working casts?

Which of the following kinds of waxes is used to adhere components of metal,gypsum,or resin together temporarily during fabrication and repair?

β-Hemihydrate is commonly used for:

What does it mean when freshly mixed gypsum loses its gloss?

An increase in the recommended water-to-powder ratio will result in a _____ accurate model.

Match the items with the correct description below. -Models

Which material is able to withstand the high heat and stress produced when molten metal is forced into molds to form indirect restorations?

Wax patterns should be invested within _____ of carving.

Which kind of wax is used to construct the metal framework of partial and complete dentures?

Match the items with the correct description below. -Diagnostic casts

Sheets of baseplate wax are usually layered to:

For regular-set gypsum products,the initial set occurs within _____ minutes from the beginning of the mix.

Match the items with the correct description below. -Casts

Which of the following represents the correct sequence for creation of a casting using the lost wax technique? 1)The pattern and sprue are encased in an investment ring. 2)A wax or plastic sprue is attached to the pattern. 3)A wax pattern of the restoration is carved on the die. 4)The enclosed pattern and sprue are heated in a burnout oven at high temperatures.