Vanilla bone and cortical bone hydrated with GEM21 S are placed for socket preservation (Fig.4,5), followed by 12x12 mm BioXclude and 4/0 PGA.  决定植骨，使用两种生物活性材料。

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Xin Wei, DDS, PhD, MS 1st edition 07/13/2020, last revision 07/29/2020