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