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ePaper created 2016-11-23, 14:26:06 | version 1.38.0
| case report 16 implants 4 2016 plastersilicone.Figure14depictsthejacketingofthe modelimplantanaloguesandimpressionpostswith gingivalmaskmaterial:theimplantimpressionafter injectionofthegingiva-mask.Thematerialshouldbe 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 syringeandhasanaturalappearance.Beforecasting 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. Thegingivalmasksandtheplasterformcleantran- sitions(Fig.16).Theclearedgesbetweengypsumand gingival mask are crucial for the clean repositioning afterremovaloftheimplantmaskduringprocessing. The casting technique was applied in manufacturing the bridge with burnout-able plastic auxiliary parts. Preventing sharp edges on the PEEK-facing side is Fig. 15 Fig. 14 Fig. 17 Fig. 16 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. 19 Fig. 21 Fig. 18 Fig. 20 42016