Question 147 · LDEK · Biomechanics and tissue response to treatment
Schwarz provided data for the assessment of force values used in orthodontic treatment by introducing four stages of biological force application. The first degree of biological force application concerns forces:
1) that are sub-threshold;
2) of value up to 15 g/cm²;
3) exceeding the capillary blood pressure;
4) of value in the range of 20-50 g/cm²;
5) causing the destruction of periodontal tissues.
The correct answer is:
2) of value up to 15 g/cm²;
3) exceeding the capillary blood pressure;
4) of value in the range of 20-50 g/cm²;
5) causing the destruction of periodontal tissues.
The correct answer is:
- A. 1,4.
- B. 1,2.
- C. only 3.
- D. 3,4.
- E. only 5.
Hint
Schwarz's first degree describes forces too weak to trigger tissue remodelling.
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