Fig. 76 shows an extremely resorbed mandible with scarred tissues caused by a subperiosteal implant that failed. The bone is exposed, fig. 77, and groove made, fig. 78. The blade is fitted and tapped into position, figs. 79, 80, 81, 82, and the tissues are sutured closed, fig. 83. The grooves are made in both rami and the various parts of the system are inserted and locked together, figs. 84, 85, 86, 87, 88, 89, 90, 91, 92. The parts are then separated so that the acrylic locking medium

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