A 8x14 mm tissue-level implant is placed with insertion torque ~ 55 Ncm (Fig.4).  A: 6x3 mm abutment; red dashed line: the superior border of the Inferior Alveolar Canal.

Fig.6: Nearly 3 months postop.  There is no bone loss 7 months post cementation (Fig.7). 

The crown becomes loose because of occlusal perforation and limited vertical space.  When a new crown is cemented, the bone density around the coronal threads is high (Fig.8 *). 

Extra Large Immediate Implant Last Next Xin Wei, DDS, PhD, MS 1st edition 05/25/2019, last revision 10/19/2019