By breaking the proximal contacts, the crown, abutment and implant at #14 are shaken loose using forceps.  Finally the crown breaks off.  Make a slot on the top of the abutment and use a screw bit to turn the abutment/implant counterclockwise.  There is abundant granulation tissue with arterial hemorrhage associated with removal.  The defect involves the distal surface of the implant at #13 and the mesial surface of the tooth #15.  Therefore bone graft is deposited in these surfaces (Fig.4 arrowheads).  The bone height 5.5 months postop should be enough for implantation (Fig.6).

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Xin Wei, DDS, PhD, MS 1st edition 02/21/2019, last revision 08/01/2019