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11 CASE STUDY for immediate temporary restorations with iSy Implants are presented in this article. First option for fabricating a temporary restoration The rst variant for fabricating a chairside temporary restoration is similar to the pro- cedure for temporary restorations for a crown restoration following preparation of the tooth. To this purpose, a pre-impres- sion of the tooth to be prepared and the adjacent teeth is taken prior to prepara- tion of the tooth. As this impression may need to be used several times and needs to be stable under storage, we use a sili- cone material for this impression. Such a pre-impression is taken for the temporary restoration with an iSy Implant prior to ex- traction of the tooth to be replaced or via a possibly removable temporary restoration, in as far as the tooth has already been ex- tracted. After implantation and suturing, a multifunctional cap is prepared, condi- tioned and mounted on the implant base in the mouth. The next step in creating a temporary res- toration again corresponds to the proce- dure of creating a temporary crown on a natural tooth. A self-hardening plastic for creating temporary restorations is applied into the pre-impression and repositioned in the mouth. After the prescribed curing time of the temporary plastic, the impres- sion is taken from the mouth. The tempo- rary plastic has now bonded mechanically with the PEEK of the multifunctional cap through the undercuts and chemically through conditioning. The original shape of the tooth has now been restored via the PEEK multifunctional cap. The tem- porary restoration is now removed from the implant base and nished extraorally. Attention should be paid to remove all oc- clusal and functional contacts here. After completion, the temporary restoration is snapped onto the implant base (Fig. 4) . In our dental practice we refrain from ce- menting the temporary restoration. The rst reason being that overlooked cement residue always represents a risk for osseo- integration of the implants, the second reason being that the multifunctional cap is held suf ciently on the implant base to provide safe retention of the temporary restoration. With the aid of the tempo- rary restoration, an anatomical emergence pro le can be shaped at the same time (Fig. 5) . After the healing period, both the temporary restoration and the im- plant base are removed and a customized abutment and the nal crown are placed (Figs. 6 and 7) . Second option for fabricating a temporary restoration A further option for preparing an immedi- ate restoration on iSy implants is the use of pre-fabricated temporary shell restora- tions. In this case the multifunctional cap is trimmed after implantation such that a temporary shell restoration can be placed in the correct position over the multifunc- tional cap. Then the multifunctional cap is conditioned with one of the above men- tioned adhesives. Now the temporary shell restoration is lled with just enough ow composite to connect the multifunctional cap with the temporary shell restoration. After light-curing of the composite, the bonded multifunctional cap and tempo- rary shell restoration are removed from the implant base and the desired emergence Fig. 3: The occlusal view shows the exact positioning of the implant in the row of teeth. Fig. 2: The multifunctional cap is placed on the implant base to prepare a chairside temporary restoration. Fig. 4: The immediate restoration is snapped onto the implant base immediately after insertion of the iSy Implant in regio 25. Fig. 6: The nal crown is placed on a customized abutment. Fig. 5: Emergence pro le shaped by the immediate temporary restoration. Fig. 7: The x-ray checkup after placement of the nal restoration shows a stable bone bed.