The next case shows periodontally involved anterior teeth that were removed, figs. 187, 188, the sockets cleansed of all debris, fig. 189, the groove made, fig. 190, and the blade inserted, figs. 191, 192. Sterile plaster of Paris was gently moulded into the open socket areas, fig. 193, and the tissues were sutured closed, fig. 194. Because of the difficulty in casting the long hollow tubes, I developed a five piece system using solid arms posteriorly and a shorter hollow tube anteriorly, extending from each anterior coping, figs. 195, 196. Due to a miscast of the anterior hollow extension tubes at the last moment I afixed the posterior solid arms to the original anterior solid arms with Duralay for 24 hours, figs. 197, 198, until the hollow anterior extensions were

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