Question 54 · LDEK · Functional appliances
Indicate the true statements about trainers:
1) they are standard appliances made of flexible materials;
2) they are standard appliances made of rigid acrylic;
3) they are contraindicated if there are obstacles in the respiratory tract, e.g. allergic swelling of the mucosa;
4) a significant disadvantage of these appliances is greater discomfort than in the case of an individual functional apparatus;
5) a significant advantage of these appliances is greater comfort than in the case of an individual functional appliance.
The correct answer is:
2) they are standard appliances made of rigid acrylic;
3) they are contraindicated if there are obstacles in the respiratory tract, e.g. allergic swelling of the mucosa;
4) a significant disadvantage of these appliances is greater discomfort than in the case of an individual functional apparatus;
5) a significant advantage of these appliances is greater comfort than in the case of an individual functional appliance.
The correct answer is:
- A. 1,4.
- B. 1,3,4.
- C. 1,3,5.
- D. 2,3,5.
- E. 2,4.
Hint
Think about what prefabricated trainers are made of, what breathing they require and how a soft ready-made device compares with a custom acrylic one.
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