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| case report Fig. 11a Fig. 11b Fig. 11c Fig. 12a Fig. 12b Fig. 13a Fig. 13b Fig. 14 28 1 2018 mension of occlusion was also determined.10 Finally, the centric relation was recorded (Fig. 6). At this point, the trays were trimmed with different thermoplastic sticks (ISO FUNCTIONAL, GC and Im- pression Compound, Red, Kerr Italia) in order to deter- mine a selective pressure in the inner peripheral seal. The patient was also trained to activate the muscles of lips, cheeks and tongue to define three-dimensionally the extension of the prosthetic margin. During the trim- ming phase, owing to the ability to bring the rims into contact, the patient could complete swallowing move- ments. Furthermore, the repeatability of the centric oc- clusion position was verified several times using this approach. Before taking the impression, the external areas of the border were released to avoid hyperextension re- lated to the overlap of the impression material. These procedures did not affect the areas of inner seal. The upper tray was drilled to facilitate the outflow of the impression material. The final impressions were re- corded with zinc oxide paste for the upper arch (Luralite, Kerr Italia) and polysulphide material for the lower arch (Permlastic Light Bodied and Regular, Kerr Italia; Figs. 7 & 8). Finally, the vertical dimension of occlusion and centric relation were confirmed. Thus, a face-bow transfer was also indicated (UTS 3D, Ivoclar Vivadent) set according to the Camper’s plane. In order to complete informa- tion about the size and shape of the anterior teeth, the Form-Selector (Ivoclar Vivadent; Fig. 9) was used. Functional impressions were poured with Class IV plaster (Vel-Mix Classic Die Stone, Pink, Kerr Dental Laboratory Products) maintaining the peripheral bor- der. The plaster was mixed under vacuum with distilled water and following manufacturer’s instructions. Before removing the impressions, models were mounted in the articulator (Stratos 300, Ivoclar Vivadent) using the face-bow (Figs. 10a & b). Before removing the trays from the master models, the length and position of the rims were recorded using a silicone key. The models were then isolated using Sep- arating Fluid and the undercuts rectified using a resilient resin (Flexacryl Soft, Lang Dental Manufacturing), being careful to avoid flow to the fornix. Once the resin was polymerised, the base was prepared using Ivolen. The anterior teeth were set using the information recorded from the rims (Figs. 11a–c). Figs. 11a–c: Anterior tooth set-up. Figs. 12a & b: Aesthetic evaluation and posterior seal probing. Figs. 13a & b: Occlusal contacts before polymerisa- tion. Fig. 14: Potsdam ditching and flasking preparation.