Mandibular endosseous implant interventions 375

Fig. 9-136. A, The operative site. B, A clean cut is made down to the bone. C, The fibromucosal tissue is reflected with a periosteal elevator to expose the underlying bone.

Fig. 9-137. The bifid implant is carefully eased into the holes made by the twist drills.

into the bone and left there. Still holding the template, the second hole was made in the bone with the helical bur. Both the helical bur and duplicate implant pin were then removed from the bone and the template, and the template was taken out of the mouth.

The bifid implant was then inserted for a trial

Fig. 9-138. The twist drills are guided through the bone for the second implant using a plastic template.

fit (Fig. 9-137). The two parallel, but angulated, pins of the implant should slide through the two artificially-made holes in the bone. All adjustments were made until it fit properly.

When the implant was finally seated to its proper depth in the bone, the horizontal bar touched the alveolar crest. The implant was then removed. A