570 Theories and techniques of oral implantology

as much tooth structure as possible so that the teeth would not interfere with the peripheral struts of the subperiosteal implant framework that straddled them. An incision was made from the retromolar pad on one side to the pad area on the other side. The incision extended to the distoproximal surfaces of the terminal abutments on each side. The tissues were retracted in the edentulous areas and from the gingival attachments around the remaining teeth with a blunt periosteal elevator.

It was necessary to expose the same bony land-marks as is done when doing the full subperiosteal implant procedures (Fig. 12-101, B).

An acrylic tray was fashioned to fit over the pre-

Fig. 12-102. The universal subperiosteal implant is fitted to the bone. There should be no interference from the anterior teeth.

pared teeth in the anterior quadrant and over both posterior edentulous areas (Fig. 12-101, C). A rubber base impression of the entire mandible was taken (Fig. 12-101, D and E). It became necessary to ex-pose as much of the symphysis and genial tubercles as possible so that the framework of the implant could encircle the teeth without the teeth interfering

Fig. 12-103. A, The implant superstructure is processed from an impression taken after the anterior restoration is completed. It contains a lingual type Kennedy bar to further support the anterior teeth. B and C, The superstructure is fitted in the mouth.

A

B

C