Very often a unilateral subperiosteal implant can get its anterior support from a cantilevered pontic extending from a previously functioning fixed prosthesis, fig. 62. An incision, reflection and exposure of the bone and the lingual groove procedures can all be done rather rapidly, figs. 63, 64, 65. An elastic impression of the bone and several of the anterior bridge teeth is taken, fig. 66, and pulled off with a full mouth alginate impression so that the implant post can be made parallel to the anterior abutment, fig. 67. The tissues are sutured closed, fig. 68. The master model is poured, fig. 69, and the uniquely designed subperiosteal implant is fabricated to fit it accurately, fig. 70. Three weeks later or the same day the tissues are re-opened, fig. 71, and the implant is fitted accurately to place, figs. 72, 73, 74, and the tissues are sutured together, fig. 75.

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