460 Theories and techniques of oral implantology

contoured and sized denture teeth positioned on the master model. If a removable prosthesis is to be used, the template need not be scalloped.

The template was tried in the mouth, held in position by screwing the small set screw through the template into the internally threaded vent-plant (Fig. 10-266). This template contained a palatal connecting bar to distribute some of the forces from one side of the arch to the other, a small vertical central strengthening strut throughout its entire length, and mushroom-like posts in the areas of the various pin holes. Although Vitallium was also suit-able, this template was cast in gold and was extremely thin in order to be lightweight. Its peripheral borders were also rolled.

Triplant pins were driven through predetermined holes in the template and built up with acrylic cores, which were then prepared for full crown restorations (Fig. 10-267). A full arch elastic impression was taken (Fig. 10-268), and a connecting bar

mesostructure with soldered copings was fabricated (Fig. 10-269) .

The mesostructure was tried in the mouth (Fig. 10-270). An accurate wax interocclusal record of centric relation was made, picking up the mesostructure. The mesostructure was returned to the master model and articulated with the lower jaw. A palateless removable denture with female Ceka attachments was processed (Fig. 10-271), although Gerber or internal clipbar attachments also could have been used.

On the final visit, the mesostructure was cemented permanently to the acrylic cores (Fig. 10-272). The removable denture was fitted and balanced (Fig. 10-273). A postoperative radiograph shows the triplants posteriorly, the vent-plant anteriorly, and the template and posterior palatal bar (Fig. 10-274). Intraoral radiographs summarizing the entire case are seen in Fig. 10-275.