The bone is narrow apical to the tooth #5 (Fig.7), which may be the reason for the severe bone loss at #6 and 7 after extraction.  Either a 2- (Fig.10) or 1- (Fig.11) piece implant will be placed.  Prepare angled 1-piece ones.

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Xin Wei, DDS, PhD, MS 1st edition 05/28/2018, last revision 07/20/2018