Since the tooth #15 is supraerupted (Fig.1 arrow) and there is limited vertical space at #18 (Fig.3), Magicore and FC (5x11 mm) will be placed at #18 and 19, respectively (Fig.3,2).  The lingual crest is more apical than the buccal (B) one.

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Xin Wei, DDS, PhD, MS 1st edition 08/17/2019, last revision 08/17/2019