on the higher post with the single-head seating instrument (23), which may be used to level the implant, or alternate from post to post to completely sink it. If one shoulder still cannot be buried, the implant is removed and the groove in the area is deepened with a 700 XXL bur.

The pointed seating instrument may be necessary when the posts are acutely angled. With a finger securing one shoulder (24), the other is tapped with the pointed seating instrument (25). The instrument is rotated from shoulder to shoulder until the bladevent is seated to its proper depth.

Caution: Continue securing (26) the untapped shoulder even after the implant enters the crest. The implant should not rock in its site, and can be easily knocked above the crest if a finger does not trap it there.

Caution: When using a modified, notched screwdriver (27) to insert a bladevent, do not approach the crest too closely with the implement. It can injure crestal bone, and should be substituted at this stage with a pointed inserting tool.

Frequently when the posts have been acutely angled and the socket entrance is labially offset, it is impossible to correctly seat the implant — with all faces of the bottom of a post resting on alveolar bone — without additional remodeling of the crest. The neck may be exposed labially (28), although palatally it contacts bone.

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