394 Theories and techniques of oral implantology

compound tube impression should never be used for duplicating an acrylic core, because some compound might lodge under the tissue-bearing surface of the core, thereby loosening the triplant.)

A full arch acrylic-and-gold veneer fixed denture was then fabricated and tried in the mouth

Fig. 10-29. The cemented prosthesis.

(Fig. 10-28). After balancing for fine adjustments, the prosthesis was affixed with hard cement (Fig. 10-29). A final periapical intraoral radiograph reveals the posterior abutment (Fig. 10-30).

Case 4

Full arch splint for a long unilateral span using mixed implants

The patient, a woman in her middle sixties, was edentulous from the left maxillary cuspid and had been wearing an all-acrylic removable denture for the past 12 years (Fig. 10-31) .

A full arch splint was planned, with three implants as posterior abutments: a titanium vent-plant, a cobalt-chrome spiral-shaft implant, and a tantalum triplant. The teeth were prepared (Fig. 10-32). A vent-plant was placed in the first bicuspid area, and a spiral-shaft implant was set in the second bicuspid area (Fig. 10-33). Pins were driven in the molar area and fused with acrylic. The core was prepared for a crown restoration (Fig. 10-34) .

All necessary impressions and bite registrations

Fig. 10-31. Preoperative photograph showing remaining teeth and an all-acrylic removable partial denture.

Fig. 10-32. All the teeth are prepared.

Fig. 10-30. The intraoral radiograph showing the tripodial implant acting as the most posterior abutment.