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Tooth movement facilitated by corticotomy and distraction osteogenesis, new paradigm in orthodontics, was discussed Intrusive tooth movement of anterior or posterior teeth was thought to be difficult or impossible. In this study, a part of cortical bone, which was a sort of resistance to tooth movement in alveolar bone, was removed On the other hand, active bone deposition was made possible in the tension side. That was the main concept of tooth movement facilitated by corticotomy and distraction osteogenesis. Teeth moved at such a speedy rate as we could not imagine in conventional tooth movement, which lead to the reduction of total treatment period. And intrusive movement was possible without a side effect for example, root resorption or the periodontal breakdown. Those were the superior aspects to the conventional orthodontics.
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