Question 164 · LDEK · Functional appliances
The springs, bended in the shape of a sinusoid, which connect the acrylic plates of an appliance are characteristic of:
1) Karłowska appliance type A, used for the treatment of distocclusions and a posterior functional position of the mandible, where sinusoid springs run from anterior lower part of the appliance in the canine region to posterior upper part of the appliance in the region of first permanent molars;
2) Karłowska appliance type B, used for the treatment of mesiocclusions and an anterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars;
3) Karłowska appliance type A, used for the treatment of mesiocclusions and an anterior functional position of the mandible, where sinusoid springs run from anterior lower part of the appliance in the canine region to posterior upper part of the appliance in the region of first permanent molars;
4) Karłowska appliance type B, used for the treatment of distocclusions and a posterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars;
5) Karłowska appliance type A, used for the treatment of distocclusions and a posterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars.
The correct answer is:
2) Karłowska appliance type B, used for the treatment of mesiocclusions and an anterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars;
3) Karłowska appliance type A, used for the treatment of mesiocclusions and an anterior functional position of the mandible, where sinusoid springs run from anterior lower part of the appliance in the canine region to posterior upper part of the appliance in the region of first permanent molars;
4) Karłowska appliance type B, used for the treatment of distocclusions and a posterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars;
5) Karłowska appliance type A, used for the treatment of distocclusions and a posterior functional position of the mandible, where sinusoid springs run from anterior upper part of the appliance in the canine region to posterior lower part of the appliance in the region of first permanent molars.
The correct answer is:
- A. 1,2.
- B. 1,4.
- C. 2,3.
- D. 3,4.
- E. 2,5.
Hint
Picture which way a compressed spring pushes the lower plate when it runs from the lower canine area up to the upper molars, and which class needs that.
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