This next case shows what a failing blade, that was over-retained in the bone for a long period of time can do, fig. 154. The exact same situation occurred on the other side. Both blades were removed, plaster of paris was gently placed into the areas of bone loss and the remaining two teeth both severely periodontally involved were removed, fig. 155. The patient wore a conventional denture for nine months untill all the bone regenerated to nearly the same height as the buccal and lingual cortices of bone that flanked the original implant failure site. Nine months later the tissues were incised and reflected to expose the bone and grooves were made, fig. 156. Four blades were symmetrically inserted and tapped to proper positions, figs. 157, 158. Suturing was accomplished, fig. 159, and uneventful healing enabled the fixed bridge to be cemented into place with no complications, figs. 160, 161, 162. The post-operative x-ray, fig. 163.

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