Dental Materials Final exam study guide

The largest component of an amalgam alloy is:

The process of physically mixing an amalgam is known as:

match the cavity prep classification with the surface area:
Class I
Class II
Class III
Class IV
Class V

If amalgam is carved after it has started to set, what will occur?

Best definition of an alloy?

Which of the following sequences is proper for placement of an amalgam alloy?

What is the main cause of an overhang on a Class II proximal restoration?

Which element is most responsible for reacting with mercury to cause the hardening of dental amalgam?

What is the phenomenon that results when a restorative material contracts and expands which in turn opens and closes the gaps at the margin of a restoration?

Which of the following materials is most often placed into a deep cavity with the intent of promoting secondary dentin formation?

In some states, including Michigan, it is legal for a dental hygienist to condense and carve restorations?

What component of many cements has a definite soothing (obtundant) property of pulpal tissue?

Placing a base in the "bottom" of a cavity preparation serves what purpose?

Which of the follow cements actually bonds to tooth structure?

Define: Under cuts and grooves

Define: Trituration

Define: Creep

Define: Dispersion Alloy

Define: Matrix Band

Define: Obtundant

Define: Lute

Define: Glass Ionomer

Define: Polycarboxylate

Define: Soluable

A patient complains that tooth #3, which contains a crown, is sensitive to hot and cold. The dentist notices that there has been a substantial loss of cement at the margins, and suspects that it is leaking. Which of the follow characteristics of the cement best explains the reason for the cement loss?

In removing a temporary zinc phosphate cement restoration from a molar prepared for an amalgam restoration, the material in the deepest portion of the restoration was left in place. This procedure was followed primarily to:

Imbibition is the :

The amount of water needed to mix various gypsum products is related to:

Increasing the water beyond the recommended amount when mixed with the powder (stone) will result in:

The preferred method for altering the setting period of an alginate impression is to change the:

The main difference between model plaster powder and dental stone powder is:

Why is dental stone vibrated after mixing?

The most likely reason for portions of teeth breaking off when a plaster or stone model is removed from an impression is:

The form of gypsum that is mined from the ground is called calcium sulfate:

The form of gypsum in a study model is calcium sulfate :

Contamination of alginate powder will occur in the presence of:

Heat is used during the gypsum manufacturing process to

The weakest of the gypsum products is

Define: Alginate Impression

Define: Fog

Define: Study model

Define: die

The ability of a material to withstand compressive stresses without fracturing is known as:

Composite restorations are classified by particle size. T/F

The filler component of a resin restoration causes the restoration to appear radiopaque on a radiograph. T/F

Strong bonding to dentin requires:

If the inflammation continues until the pulpal tissue cannot recover, this condition is called:

Plaster requires more water for mixing than stone because:

A busy dental hygienist took alginate impression on a patient and left the unwrapped on the counter in the lab. Several hours later, the models were pourred. Which process was most likely to have occurred?

This layer of debris prevents contact between intact dentin and bonding agent/adhesive is called:

Adhesion of dental materials to enamel is accomplished by:

The name of the removable tooth or teeth in a positive gypsum stone cast used in the fabrication of crowns and bridges is called:

Composites that are currently used for the restoration of anterior teeth are called (this composite produces luster and shine):

The dental laboratory ____________ the appliance on models to simulate how it will occlude in various jaw positions.

The size of the filler particles in a dental composite determines the:

Glass ionomer composites are recommended for class V restorations. T/F

Jan, 20 years old, is at the DDS office and inquiring about bleaching options. She has disclosed she is a smoker, has tetracycline stain and is under care for gingivitis. She really wants to have whiter teeth and a healthier mouth. Since Jan has tetracycline stain, what would you tell her about bleaching possibilities?

Since Jan has gingivitis, you would recommend what before bleaching:

Jan smokes and she does not understand how that effects bleaching:

The most commonly accepted universal impression material type is known as:

Ideally, dental materials should have a _______ coefficient rate of thermal conductivity.

Which type of bleaching system is used to lighten a tooth that has previously had endodontic treatment?

What is the correct bleaching agent used for at- home tray bleaching:

Bonding to dentin is dependent on the mechanical bonding of materials as opposed to chemical bonding. T/F

The gypsum product whose powder particles is smallest, round in shape, and produce the strongest and least porous product is:

Sensitivity in the form of an electrical shock to the pulp that results when two restorations of different metals occlude with each other during mastication is known as:

Percolation results when a restorative material _________ and ______________.

The Linear coefficient of thermal expansion is a measurement of a change in volume of a material in relation to a change in:

Existing darker composite restorations should be replaced after bleaching so that the new color of the teeth will match the restorations.
T/F

In patients with exposed root surfaces, tooth whitening is commonly a contraindication.
T/F

A variety of clinical trials have validated the safety and efficacy of tooth whitening, so pregnant and lactating women can safely bleach their teeth.
T/F

The ADA recommends disinfecting impressions with sodium hypochlorite prior to pouring them up in plaster or stone.
T/F

The bleaching agent used for take- home bleaching trays is carbamide peroxide.
T/F

The warmer water mixed with alginate, combined with a warm oral cavity will make the impression material set faster
T/F

Define: Intrusive Luxation