Figure 12 Diagrams of sagittal breast axis of normal IMF anatomy (above, left) where the dotted line arrow indicates the full-thickness incision of the breast tissue to reach the PM with the periareolar approach; implant positioning in a correct dissection route (above, right); double bubble characterized by the presence of a groove or indentation which creates a double convexity (below, left); and bottoming out characterized by a too lowered implant, without any double convexity and with an unaesthetic lengthening of the nipple to fold distance (below right) deformities (Salgarello et al., 2017)