Fig.9: When a D2 implant (3.5x4.5x20 mm) is just placed, there is no bone between threads.

When a definitive restoration is cemented 5 months postop, the bone has initally grown into most of the spaces between threads.  But the 1st thread is not completely covered by the bone (Fig.14<). 

D Implant Last Next Xin Wei, DDS, PhD, MS 1st edition 09/20/2015, last revision 09/09/2018