More than often severe undercuts exist both lingually and buccally in the areas where implants are to be inserted, figs. 61, 62. Extreme care must be taken not to perforate these undercut areas, figs. 63, 64, so that the blades will not encroach upon these narrower surface areas, figs. 65, 66. Careful suturing is done, fig. 67. Healing as usual, is uneventful, fig. 68. The teeth are then prepared, fig. 69, and the full arch fixed prosthesis is then completed, figs. 70, 71, 72. The final x-ray, fig. 73.

172