To place a bone-level implant (Fig.7 green), an abutment (blue) with long cuff (pink) is to be used.  With poor implant/crown (white) ratio, stress occurs at the junction of the implant/abutment (red arrow), resulting in easy abutment screw loosening.  In contrast, stress may be applied to directly to a tissue-level implant (Fig.8 arrow) with less likelihood of abutment screw loosening.  The implant/crown ratio improves by approximately 5.5 mm.

Tissue-Level Last Next Surgery

Xin Wei, DDS, PhD, MS 1st edition 03/03/2019, last revision 05/31/2019