382 Theories and techniques of oral implantology

Fig. 9-155. Copings are placed over the implant shafts.

Fig. 9-156. The copings are picked up with a plaster index.

Fig. 9-157. Duplicate implant shafts are placed inside the plaster index.

Fig. 9-158. A, The processed full arch fixed denture. B, The finished prosthesis affixed with hard cement.

rectly over the duplicated shafts. The final impression can also be accomplished with elastic impression materials, if desired.

Case 16

A removable prosthesis for an edentulous mandible using vertical post implants with a connecting bar

When a fixed full arch denture that is easily re-movable is desired, the following technique can be used. In the patient in this case, the implants were first set into the bone (Fig. 9-159). Interchangeable copings were then placed over them.

A plaster index was immediately taken and the master model poured. A round or oval gold bar can be soldered to the copings in an around-the-arch fashion (Fig. 9-160), or a vertical connecting bar may be cast and soldered to the copings (Fig. 9-161). The prosthesis, with a groove made on its undersurface, will fit over the bar (Fig. 9-162). The completed superstructure, consisting of copings connected by a gold bar, was cemented over the implants with hard cement (Fig. 9-163) .