Fig. 1
From: Clinical analysis of successful insertion of orthodontic mini-implants in infrazygomatic crest
Measurement items. A Mini-implant coordinates(a, b): the long axis of the mini-implant (i.e., the line from the center point of the implant crown to the implant tip) which in contact with the buccal surface of the infrazygomatic crest. B Implantation angle and bone thickness around the mini-implant: α: Implantation angle formed with the horizontal reference plane; c: Buccal bone thickness d: Palatal bone thickness; (L1 + L2)/2 + (L3 + L4)/2: Cumulative cortical bone thickness