In fact the implants either perforate the palaatal or buccal (B) plate, as revealed by CBCT (1 year 6 months postop, immediately post cementation, Fig.8,9).  It appears necessary to have guided surgery and smaller implant in the narrow ridge.

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Xin Wei, DDS, PhD, MS 1st edition 08/31/2018, last revision 09/01/2018