Due to new coronal virus fear, the patient wants extraction first.  The sinus floor perforates (*) apical to MB (Fig.6) and DB (Fig.7) roots.  After debridement, sinus lift will be conducted using allograft hydrated with GEM21S liquid portion. ^: furca radiolucency.

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Xin Wei, DDS, PhD, MS 1st edition 03/17/2020, last revision 03/18/2020