For information regarding the basic principles for difficult movements, refer to the following:

• Basic Principles for Intrusions & Extrusions
• Basic Principles for Rotations

Basic Principles for Intrusions & Extrusions

For basic principles or intrusions and extrusions, refer to the following:

1. A tooth that’s not upright will not extrude or intrude easily.

2. Place a horizontal engager and tilt it upright first.

3. Make sure there is adequate interproximal space; use IPR where appropriate to make space and prevent collisions.

4. Then extrude or intrude slowly.

Extrusion

Intrusion

5. If an extrusion doesn't work, try button & elastic auxiliaries..

Basic Principles for Rotations

For basic principles for rotations, refer to the following:

1. A tooth without space won't rotate.

2. Give it adequate space to move/rotate without restriction by adjacent teeth.

3. Then place an engager on the tooth to be rotated and rotate it.

4. If you're having trouble with rotations, see our article on troubleshooting rotations.