Dental materials #2

A dental laboratory with various dental materials and equipment, including gypsum products, acrylics, and dental tools, in a bright and organized setting.

Dental Materials Knowledge Quiz

Test your knowledge on dental materials and practices with our comprehensive quiz! This quiz covers various aspects, including gypsum products, acrylic, denture teeth, and more. Perfect for students, professionals, and anyone interested in dental sciences.

26 multiple choice questions
Assess your understanding of dental materials
Engage with practical scenarios and facts

26 Questions6 MinutesCreated by MixingMud27

When should impressions be disinfected

At the dental lab check in

Before rinsing with water

Chairside upon removal and after rinsing under water

For an hour before pouring in gypsum

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

Impression plaster (Type I)

Model plaster (Type II)

Dental stone (Type III)

Dental stone, high strength (Type IV)

Which of the following statements is true concerning the mixing of plaster and stone materials?

The measured amount of powder is placed into the mixing bowl and the water is slowly sifted into the powder

The measured amount of powder is placed into the mixing bowl and the water is dumped into the powder

The measured amount of water is placed into the mixing bowl and the powder is slowly sifted into the water

The measured amount of water is placed into the mixing bowl and the powder is dumped into the water

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

Beginning of the working time

Final compressive strength

Initial set

Final set

Utility was may be used to 1. Adapt the periphery of an impression tray 2. Provide a better fit into the vestibule of the impression material 3. Cover sharp brackets and wires for orthodontic patients

1,2,3

1,2

2,3

Which of the following correctly represents the stages seen when acrylic powder and liquid are mixed together

Dough, sandy, rubber, and strungy

Stringy, sandy, dough, and rubber

Sandy, stringy, dough, and rubber

Rubber, stringy, dough, and sandy

Which of the following is true of plastic (acrylic) and porcelain denture teeth?

Porcelain teeth are used more often than plastic teeth

Porcelain denture teeth chemically bond to the acrylic base of the denture

Plastic denture teeth do not wear the opposing natural or artificial teeth or restorations

It is easier to grind porcelain denture teeth rather than acrylic denture teeth to adjust the occlusion or to reshape a tooth to fit the available space

A specialized aspect of a/an ___ practice may include the fabrication of maxillofacial prostheses to replace facial tissues lost as the result of trauma, disease, surgery, or birth defect

Prosthodontic

Periodontic

Endodontic

Orthodontic

Why must dentures be relined periodically?

Dentures absorb odors from plaque and food

Dimensional changes in acrylic occur

Alveolar ridges shrink over time

How long would it take a prepared tooth without occlusal/incisal and proximal contact to migrate laterally or occlusally/incisally?

Days

Weeks

Months

Years

Which of the following is true of preformed polycabonate provisional crowns

They are incompatible with acrylic resin

Like metal, they are flexible and may be crimped with contouring pilers

The primary advantage is their esthetics for replacement of anterior teeth

Unlike their metal partners, they do not come in several sizes and shapes

_______ generated during the polymerization of chemical-cured acrylic can potentially damage the pulp or burn soft tissues.

Heat

Off-gassing

Chemical by-products

Hydroquinone

Cement provisionals are most frequently fabricated with which material?

Zinc polycarboxylate

Zinc oxide eugenol

Calcium hydroxide

Zinc phosphate

Zinc oxyde provisionals should not be used if a permanent restoration is to be cemented with a _____ luting agent

Resin

Glass ionomer

Zinc phsphate

Zinc polycarboxylate

If a provisional crown comes off during a time that the dental office is closed, the patient can be instructed to replace it after cleaning the interior of the crown and placing a small amount of ____ into the crown

Cyanoacrylate (super glue)

Liquid nails cement

Denture adhesive

Chewing gum

What home care instructions would be given to a patient with a provisional restoration

Do not brush or floss the restoration

Brush but do not floss the restoration

Brush and floss the restoration as you would any other tooth

Brush and floss the restoration sliding the floss through the cervical embrasure

What is the most common use of stainless steel crown?

Crown prep on an adult molar

Crown prep on a primary molar

Crown prep on an anterior tooth

Bridge prep in the adult posterior teeth

Which of the following is true regarding sports guards

They usually cover the mandibular teeth, gingiva, and bone

They can absorb 100% of the energy from a traumatic hit to the mouth

They cannot prevent lacerations to the lips for athletes with orthodontic braces or brackets

They can cushion the maxillary and mandibular teeth when an athlete's jaw are forced together by a blow to the lower jaw

A sports guard thickness of about ___mm is desirable for heavy contact sports in which injuries are more likely

What is a risk factor for obstructive sleep apnea (OSA)

Obesity

Large neck

High blood pressure

All of the above

What is a common treatment for people with severe OSA

Weight loss

Use of a CPAP machine

Reduced alcohol intake

Use of nasal decongestants

What is the function of an appliance for treating OSA?

Lifts the soft palate

Repositions the mandible

Postures the tongue forward

All are correc

When would a space maintainer be used?

Hold space for a permanent tooth

Guide a permanent tooth into place

Prevent a primary tooth from being lost prematurely

Open more space in the dental arch for accurate eruption

Which type of tooth aligner would be used for minor tooth movement

Space maintainer

Acrylic bite guard

Thermoplastic guard worn at night

Removable appliances that direct forces on the teeth to move them into proper alignment

One of the most important jobs of a dental hygienist is

Discussing weight with an overweight patient

Educating our patients on proper homecare

Judging patients on their lifestyle

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Dental materials #2

Dental Materials Knowledge Quiz

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