Because the duration of a force is more important than the magnitude (strength) of the force applied, habits such as thumbsucking will not produce tooth movement unless practiced for at least how many hours per day?

Question

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Because the duration of a force is more important than the magnitude (strength) of the force applied, habits such as thumbsucking will not produce tooth movement unless practiced for at least 6 hours per day.

Because the Duration of a Force Is More Important Than