The anterior retainer is kept as a crown at #11 (Fig.2: C), whereas the posterior abutment (the tooth #13) will be extracted and an immediate implant is going to be placed.  Note the atrophic buccal plate corresponding to the site of #12 (arrowheads).  A narrower implant will be used at the site of #12.

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Xin Wei, DDS, PhD, MS 1st edition 05/06/2014, last revision 01/19/2018