Even more practical than these attachments is the latest horizontal passive type Lew attachments, which work out exceptionally well with these horizontal bars. Each bar is cast with a tiny hole passing through it on each side to accept the attachment. When the horizontal attachments are pushed inside and through the holes in the bar, fig. 266, and the outside heads of the attachments are flush with the denture, fig. 267, the denture is locked into position and cannot be re-moved until the patient pulls the head of the attachment laterally in both directions, fig. 268, in order to release the horizontal extensions, fig. 269.

In this severely resorbed mandible, figs. 270, 271, 272, 273, the implant was designed with a continuous horizontal bar off three joining parts in order to prevent torquing of the extremely

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