The patient requests extraction of the tooth #17; the tooth #18 seems non-salvageable.  When an immediate implant is placed in the middle of the socket (Fig.3,4 (coronal section)), there is limited amount of the native bone to stabilize the implant (~1 mm). 

Osteogen Plug Last Next Xin Wei, DDS, PhD, MS 1st edition 12/01/2019, last revision 12/01/2019