Question 198 · LDEK · Biomechanics and tissue response to treatment
“It happens when the point of force application lays apically towards the centre of tooth resistance, and centre of rotation is positioned coronally. In order to obtain only such movement, ratio of the torque to force acting on the tooth must be at least 12/1”. Above-mentioned description concerns:
- A. uncontrolled tooth inclination.
- B. controlled tooth inclination.
- C. root movement or torque.
- D. tooth translation.
- E. none of the above mentioned.
Hint
Consider which movement keeps the crown nearly still while the root moves, and what moment-to-force ratio it requires.
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