Chapter 19 Preventive and Corrective Oral Appliances

Chapter 19  Preventive and Corrective Oral Appliances

Complete Chapter Questions And Answers
 

Sample Questions

MULTIPLE CHOICE

1. Which of the following is true regarding sports guards?
a.
They usually cover the mandibular teeth, gingiva, and bone.
b.
They can absorb 100% of the energy from a traumatic hit to the mouth.
c.
They cannot prevent lacerations to the lips for athletes with orthodontic braces or brackets.
d.
They can cushion the maxillary and mandibular teeth when an athlete’s jaws are forced together by a blow to the lower jaw.

ANS: D
Sports guards can cushion the maxillary and mandibular teeth when an athlete’s jaws are forced together by a blow to the lower jaw. They can absorb 80% of the energy from a traumatic hit to the mouth. They usually cover the maxillary teeth, gingiva, and bone. Occasionally, they are made to cover both arches at the same time. They can prevent lacerations to the lips for athletes with orthodontic braces or brackets and can protect dental work such as bridges, anterior veneers, or crowns.

REF: p. 344 TOP: Preventive and Corrective Oral Appliances (Protection)

2. A sports guard thickness of about _____ mm is desirable for heavy contact sports in which injuries are more likely.
a.
1
b.
2
c.
4
d.
8

ANS: C
A sports guard thickness of about 4 mm is desirable for heavy contact sports in which injuries are more likely. For less physical sports, 2 mm of thickness may suffice. Sports guards need a certain thickness and stiffness to maximize their protective qualities.

REF: p. 344 TOP: Preventive and Corrective Oral Appliances (Protection)

3. Hard acrylic guards are usually fabricated in the dental _____ and usually require _____ time to adjust than guards made from soft thermoplastic sheets.
a.
office; more
b.
office; less
c.
laboratory; more
d.
laboratory; less

ANS: C
Hard acrylic guards are usually fabricated in the dental laboratory and usually require more time to adjust than guards made from soft thermoplastic sheets, because the acrylic, like other resins, shrinks when cured. Guards often feel tight on the patient’s teeth when first tried in. Guards made from soft thermoplastic sheets are easy to make and may be fabricated in the dental office by the assistant, hygienist, or dentist or sent to a commercial dental laboratory.

REF: p. 345 TOP: Preventive and Corrective Oral Appliances (Types of Materials)

4. Which statement best describes a soft guard?
a.
Made from acrylic
b.
Constructed in a dental lab
c.
Requires less time to adjust
d.
Requires more time to adjust

ANS: C
Soft guards are better suited for patients who do not grind their teeth consistently. They are made of thermoplastic sheets and may be fabricated in the dental office by the assistant, hygienist, or dentist.

REF: p. 345 TOP: Preventive and Corrective Oral Appliances (Types of Materials)