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ePaper created 2016-05-19, 12:42:25 | version 1.38.0
| case report 26 implants 2 2016 On the one hand, the technician must guess the implant orientation correctly, on the other hand, sometimes the impression material overflows through the impression tray holes due to the pres- sure exercised while taking the impression. A pos- sibly necessary reworking on the individual tray due to the divergence of implant positions can ad- versely affect stability, which could lead to break- age during impression taking. That is why we only usetheMiratray®impressiontray(Hager&Werken) inimplant-supporteddentures.Thepenetrablefoil seal prevents overflow of the impression material (Fig. 2b). Thus, incorrect positioning of the tray is almostimpossible.Theplastictraycanbereworked forpatientcomfortattheedgesandindividualised. In this case, retentions can be drilled for the im- pression material (Fig. 2b). The double-impression technique itself is carried out in a mixing method in combination of high and low viscous silicone. This is followed by the selection of the desired tooth shade. The recommendation of age-appro- priate tooth colour shade was refused by the pa- tient and he opted for the VITA colour A1. The gum colour is determined using a gum-colour ring (GC initial gum set) in the presence of the dental technician. Fig. 3a Fig. 3b Fig. 4a Fig. 3c Fig. 4b Fig. 4a: Parallelism check between bipupullary line and occlusal plane. Fig. 4b: Parallelism check between occlusal plane and Camper's plane. Fig. 3a: “PÜR”-mock-up bridges with pin registration set. Fig. 3b: Visualising the joint movements on the mandibular. Fig. 3c: Bite encryption of the pin registration plate. 22016