the newly formed canal and being that the vertical portion of the inverted T was narrower than the mental branch, it prevented the mental bundle from rising outside its wider and rounder newly created mental foramen, fig. 300. The same procedures were carried out on the opposite side, figs. 301, 302, 303. After covering the exposed nerves with a soft wax an impression of the mandible was taken with Citricon, fig. 304, and the tissues were sutured closed, fig. 305. On the master model the subperiosteal implant was designed in such a manner that no cross struts passed over the area, where the nerves were originally exposed, fig. 306, and the implant was cast, fig. 307. About five weeks later the implant was carefully seated after a complete lingual incision

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