Which of the following is NOT a type of tooth movement based on one plane of space?

In the context of orthodontic tooth movement, looking at the types based on one plane of space helps us understand how teeth can be moved effectively. Translation, rotation, and to some extent, uncontrolled tipping all describe movements that can occur within a single plane.

Translation refers to the movement of the tooth in a straight line within the same plane, which is clearly a one-dimensional movement. Rotation involves the tooth pivoting around a specific axis, again fitting within a singular plane of motion. The combination of both describes movements that can occur in a straightforward manner but still remain confined to one plane at a time.

Uncontrolled tipping, however, does not fit neatly into the category of one-plane movements. It involves a tipping motion that can occur in multiple directions or planes, causing the tooth to tilt rather than moving strictly within one dimension. This complexity is what distinguishes uncontrolled tipping from the other forms of movement. Thus, it is accurate to identify uncontrolled tipping as not being a movement confined to a single spatial plane, making it the correct identification in this context.