Based on the equilibrium theory, the position of the teeth is determined by forces applied by which of the following?

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Based on the equilibrium theory, the position of the teeth is determined by forces applied by all of the above soft tissues. Although the forces applied by the lips, cheeks, tongue, and periodontal ligament are light in magnitude, they are applied for a long period of time throughout the day. Tooth position remains stable as long as the magnitude of the forces applied by these tissues exists in a state of equilibrium.

Based on the Equilibrium Theory, the Position of the Teeth