If primary stability is questionable with the bone-level implants mentioned above (when the corresponding tap is being used), a 7x14 mm gingiva-level implant will be the next alternative (Fig.7).  If primary stability is still insufficient, a 7x17 mm (with sinus lift) or 8x14 or 17 mm will be placed (Fig.8).  The larger the implant, the less bone graft is used (compare Fig.7,8).

Bone vs. Gingival Level Implants

Xin Wei, DDS, PhD, MS 1st edition 01/01/2015, last revision 01/01/2015