above the right mental bundle than the left one, figs. 39, 40, 41. The implant, usually fenestrated along most of the labial and buccal peripheral strut except for the areas that circumvent the mental bundles is inserted, figs. 42, 43, and the temporary acrylic stent which includes six anterior acrylic teeth and two geometrical planes of occlusion posteriorly is fitted over the implant posts, fig. 44. It should be quite a distance away from the bone and should occlude accurately to the existing upper denture as it was fabricated from a "bone bite". The tissues are sutured closed, fig. 45, and the acrylic stent is once more fitted, fig. 46, making certain of proper occlusion, figs. 47, 48, and being certain that its base is implant borne only.

The necks of the subperiosteal implant must always be in attached gingivae thus the posterior protruding posts should always be on or very near the mylohyoid ridges, fig. 49. The implant denture is snapped into position, figs. 50, 51.

This fractured mandible was wired to the patients existing all acrylic denture, which cannot be seen on an x-ray, fig. 52. At the end of eight weeks a complete bony union had been accomplished, fig. 53, although the body of the mandible on the right side was extremely foreshortened.

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