When the surgical guide for #28 is removed, the 4x13 mm implant is found to be superficial and buccal.  Part of the buccal mucosa is nonkeratinized.  After 1 mm deeper placement of the implant, CT confirms the buccal placement (Fig.1, as compared to design).

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Xin Wei, DDS, PhD, MS 1st edition 04/18/2019, last revision 04/18/2019