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Fig. 4. Treatment objectives. A, Treatment plan for repositioning of the molars. B, Schematic diagram of treatment objectives. The maxillary first molar is intruded by 3 mm. The mandibular first and second molars are uprighted by 60° and 30°, and extruded by 6 mm and 1 mm, respectively. U6, Upper first molar; L6, lower first molar; L7, lower second molar; CR, center of resistance.
Korean J Orthod 2020;50:268~277 https://doi.org/10.4041/kjod.2020.50.4.268
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