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ePaper created 2017-09-20, 09:19:59 | version 1.38.0
implants_report Fig. 14: Jacketing of the model– implants and impression- posts with gingival mask material. Fig. 15: Gingival mask after preparation. Fig. 16: The gingival masks and the plaster form clean transitions. Fig. 17: The metal bar on the model with the gingival mask. Fig. 18: The bar-body extends far into the vestibular area for static support among the teeth. Figs. 19 & 20: The PEEK framework before completion. Fig. 21: PEEK-frame when placed on the milled bar. Fig. 14 Fig. 15 Fig. 16 Fig. 17 Fig. 18 Fig. 19 Fig. 20 Fig. 21 plaster silicone. Figure 14 depicts the jacketing of the model implant analogues and impression posts with gingival mask material: the implant impression after injection of the gingiva- mask. The material should be bubble free and clean when applied. We use Shera-Gingival® for the gingival masks. This material is pressed from a mixing tip with a fine syringe and has a natural appearance. Before casting with plaster, the gingiva must be removed from the impression to eliminate all banners and undercuts, thus easy removal and more importantly—a safe re- positioning is ensured. To take the gingival mask from the model, the model implants should be un- screwed before, so that the impression copings are not changed in their position. This work must be carried out very carefully and cautiously. Figure 15 shows the gingival mask after preparation. The edges are smoothened with abrasive belts and rubber. In the plaster, the implants remain safe and there are neither flags nor undercuts which would make it difficult to reposition. The gingival masks and the plaster form clean tran- sitions (Fig. 16). The clear edges between gypsum and gingival mask are crucial for the clean repositioning after removal of the implant mask during processing. The casting technique was applied in manufacturing the bridge with burnout-able plastic auxiliary parts. Preventing sharp edges on the PEEK-facing side is 40 3_2017 40 implants