Abstract
The goal of this paper is to describe and discuss the clinical use of intrusion mechanics during orthodontic therapy. The biomechanics of the classic segmented intrusion arch is explored along with modification of the appliance design to intrude and retract anterior teeth simultaneously. The advantages and limitations of intrusion mechanics are presented and the side effects analyzed to avoid undesired tooth movement and optimize clinical outcomes. The implications for the esthetic of the smile and the retention of intrusion are also discussed.
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