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10 CASE STUDY Dr. Jan Klenke, Hamburg CHAIRSIDE OR LABORATORY – OPTIONS OF TEMPORARY RESTORATIONS WITH THE ISY IMPLANT Fig. 1: The iSy Implant system with transgingival application. Both the gingiva former and the multifunctional cap (for impression taking and temporary restoration) are attached to the implant base. Conceived as a transgingival healing, reduced implant system, iSy was launched on the market three years ago to enable patients with limited nancial means to have restorations with implants. In standard indications, transgingival healing reduces the surgical effort required and prosthetic follow-up is easy to implement. The option of submerged healing also exists if required. The following article describes the different temporary restoration options of the iSy Implant system with the components included in the set. In our dental practice we employ iSy by CAMLOG as a transgingival healing im- plant system in line with the original idea. This concept has been established for many years and is well documented [1]. We regard a bone bed which requires no or only little augmentation as a precondi- tion for transgingival healing [2]. Stable, suf ciently thick soft tissue in the region of the planned insertion site is at least equally important. The surface of the iSy Implants is identi- cal to the blasted and etched Promote ® Surface of the CAMLOG ® and CONELOG ® Implants. In retrospective studies this has demonstrated a success rate [3]. A rst iSy study from October 2015 showed ex- cellent 1-year results following prosthetic restoration [4]. The iSy Implant is inserted in the jaw bone with the aid of the pre-mounted implant base on the implant. Following the con- cept, a PEEK gingiva former is generally mounted on the implant base for the pe- riod of healing (Fig. 1) . Transgingival healing not only saves the patient a second surgical procedure with associated costs, but allows immediate temporary restoration with the iSy im- plant. The multifunctional caps, which are also mounted on the implant base, act as framework for the temporary restoration (Fig. 2) . These temporary restorations can be fabricated cost-effectively “chairside” with little time expenditure. In many cases, elaborate permanent or removable labora- tory-fabricated temporary restorations are no longer necessary. Various fabrication options are possible for fabricating the temporary restorations. Common to all options, is rst shortening the multifunctional cap by grinding, so that there is suf cient space for the shape of the temporary restoration (Fig. 3) . The chemical bond between the plastic of the temporary restoration and the PEEK multi- functional cap proved to be a problem for a longer period. A study by Starwarczyk et al [5] shows that only the following three adhesives are able to create a bond between PEEK and plastic: by Bredent, Signum PEEK by Heraeus Kulzer (test phase) and Monobond plus by Ivoclar Vivadent. After trimming the multifunc- tional cap, this needs to be conditioned with one of the above mentioned adhe- sives. Three of the many possible options