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Extra-radicular screw placement addresses one of the main challenges of inter-radicular screw placement, that is root interference during a large scale of tooth movement. This lecture will provide application examples of extra-radicular screws in treating sagittal and vertical problems as well as impactions.
Learning Objectives:
Identify appropriate screw insertion sites according to the corresponding types of malocclusions.
Describe the function of a 3-D lever arm in the force system for impaction treatment.
Compare the difference between inter-radicular screw placement versus extra-radicular screw placement.
