Before placement of a 4.5x11.5 mm final UF implant, allograft is placed in the 3 defective bony areas mentioned above, including the apical mesial one (Fig.6 *).  But the final UF implant seems too short with non-satisfactory torque.  S: graft lost in the sinus.

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Xin Wei, DDS, PhD, MS 1st edition 09/27/2019, last revision 09/27/2019