A Rational Approach to Sinus Augmentation: The Low Window Sinus Lift

Figure 1

The Low Window Sinus Lift antrostomy. The lower osteotomy line (blue) is positioned flush with the sinus floor. The upper one (green) is 6 mm higher; that is, it is placed at a distance from the ridge equal to the residual bone height plus 6 mm. The mesial line (brown) is flush to the sinus anterior wall. The distal one (red) should be placed in correspondence with the position of the most distal implant.