Mandibular endosseous implant interventions 381

Fig. 9-152. A, The various burs and taps are seen making the necessary holes for insertion of the implants. B, The implants are inserted. C, The implants should be as nearly parallel as possible to one another.

Fig. 9-153. The occlusal surface of the implant shafts are marked with an indelible pencil.

wax-up is fabricated directly over the shafts. The case is finally processed and cemented into place after final occlusal adjustments are made (Fig. 9-158).

The other method involves eliminating the copings entirely. A full lower plaster index is taken of the protruding shafts, and duplicate shafts are placed inside the plaster. The master model is then poured and articulated, and the prosthesis is fabricated di-

Fig. 9-154. A, The prefabricated acrylic splint is fitted into position. B, It is carefully articulated.