Tapered or D2 Implant?

The tooth #13 has broken down to residual root now.  CBCT sagittal (Fig.1,3) and coronal (Fig.2,4) sections show designs of T (4.5x17 mm Fig.1,2) and D2 (Fig.3,4) implants.  Which is better?  It appears that sinus lift with bone graft is expected.

In fact, D2 implant is placed.

Return to Professionals, Upper Premolar Immediate Implant

Xin Wei, DDS, PhD, MS 1st edition 04/22/2014, last revision 09/10/2014