A 4.5x12 mm implant is placed as planned (Fig.4). Dashed line: the upper border of the inferior alveolar canal.  Then autogenous bone (harvested from reamers) is placed around the most coronal portion of the implant (with microthreads).

The 1st 4 coronal threads remains outside the bone 3.5 months postop (Fig.7).  It appears that less thread exposure (3 instead) 1 year 7 months postop (Fig.8), suggesting bone growth.

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Xin Wei, DDS, PhD, MS 1st edition 08/10/2014, last revision 01/19/2018