At the site of #20, a 1-piece implant (3 mm) will be used (Fig.5,6): apparently the shorter one (10 mm) is safer than 12 mm one.
For the narrow ridge at the site of #19 (Fig.7), the coronal exposed threads of the 5x12 mm implant will be bone grafted (Fig.8 red circles).
On the top of the ridge is CT scan stent.
Xin Wei, DDS, PhD, MS 1st edition 05/23/2015, last revision 05/28/2015