When a 3.5x17 implant is placed at the site of #8, it has to be placed along the long axis of the ridge (Fig.1: CT coronal section). It causes the abutment to be too labial; angle of the abutment has to be 45°. The maximum angle of 3 mm abutment is 20°.
If a shorter implant is placed (3.5x14 mm, Fig.2 (at the site of #9)), the trajectory could be oblique. That is, the apical end of the implant is close to the labial plate (upper arrowhead: <), whereas the coronal end close to the palatal plate (lower arrowhead: >). The end result is that the angled abutment could be 20°.
Return to Oblique Placement
Xin Wei, DDS, PhD, MS 1st edition 02/22/2015, last revision 02/22/2015