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The roots of the teeth #15 and 16 are so close to each other that interference may occur when the tooth #15 is being uprighted (Fig.9). 53岁男右上5根裂，种植后要求修复左侧缺牙。理想方法：竖直左上7，创造6空间种植。埋伏牙可能影响7竖直。
Xin Wei, DDS, PhD, MS 1st edition 05/25/2019, last revision 12/06/2020