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Fig. 2. A, Coronal slice consisting of the apex of the distobuccal root of the permanent first maxillary molar. B-D, Measurement of infrazygomatic crest thickness, performed at 11 mm above the buccal tip of the right first maxillary molar at an angle of 70 degrees to the occlusal plane.
Korean J Orthod 2021;51:387~396 https://doi.org/10.4041/kjod.2021.51.6.387
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