The crown at #8 is loose 2 years postop (1 year 9 months post cementation, Fig.19).  Following implant removal and debridement, extend the osteotomy for 2 mm using 1.2, 1.5 and 2 mm drills.  If the defect is not too extensive, bone graft will be done from inside the osteotomy out.  Insert a 3x16(4) mm 1-piece or 3.5x17 mm 2-piece implant (Fig.21).  Take Alginate impression when the patient returns for surgery in case of failure of implant re-placement.

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Xin Wei, DDS, PhD, MS 1st edition 09/28/2018, last revision 09/29/2018