When setting the anchorage, what is the main goal concerning the movement of units involved?

In orthodontics, effective anchorage is crucial for managing tooth movement. The main goal when setting the anchorage is to restrict movement of the passive unit. This means that while one unit (the active unit) is being moved, the unit being used for anchorage (the passive unit) should remain stable and not move.

By restricting the movement of the passive unit, the orthodontist ensures that the force applied to the active unit is not countered by undesired movement of the passive unit. This allows for greater control and predictability in the desired tooth movement, ultimately leading to more effective treatment outcomes.

The focus on limiting the movement of the passive unit is essential in scenarios where maintaining a specific anchor point is crucial, such as when closing spaces or moving teeth into alignment. It prevents any unwanted movements that could complicate the treatment process or lead to less effective corrections.