Fig. 12-92. The implant was fitted over the exposed bone.

Fig. 12-93. The implant was locked tightly to the bone when the lingual extensions of the transfixation pins were "riveted" to the lingual peripheral border of the substructure by grinding them flat with a heatless stone.

Fig. 12-94. The tissues were sutured to cover the implant and to closely adapt around the protruding post.

Fig. 12-95. After 3 weeks the tissue around the implant was completely healed.

Fig. 12-96. A two-unit acrylic splint was cemented over the protruding posts.

Fig. 12-97. A cross-sectional occlusal x-ray shows the subperiosteal implant with the horizontal transfixation pins.