In addition to tilting of UL7 (Fig.7), there are diastemata between U1s and UL3 and 4 (Fig.8,9 arrowheads).  54岁男缺失左上6，左下7（图七，九），邻牙移位，准备局部牙齿矫正，然后植牙。

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Xin Wei, DDS, PhD, MS 1st edition 06/14/2020, last revision 03/21/2021