Sometimes implants were made from the very beginning with a bar-superstructure, for sup-porting the implant denture that contained horizontal Lew attachments, figs. 287, 288, 289, 290, 291, 292, 293, 294a,b, 295.

One of the most difficult cases I have ever done is seen in fig. 296. Upon exposing the bone, fig. 297, both inferior alveolar nerves along their entire extent along the body of the mandible as well as both mental neurovascular bundles were exposed, fig. 298. While lifting each nerve up a mandibular canal was created and an inverted T or keyhole was fashioned on the buccal surface of the bone to create a mental foramen, fig. 299. The inferior alveolar nerve was pushed into

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