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ePaper created 2017-03-17, 11:21:45 | version 1.38.0
use of the magnification systems industry report | Fig. 6 Fig. 7 Fig. 6: With the resin jig the correspondence between the position of the wax-up and the implants located in the oral cavity is searched; after that the teeth set-up, the model and the implants position were scanned. Fig. 7: After making the teeth set-up translucent, the design of the structure was begun, considering the available space and the position of the teeth and of the implants. It is also evaluated the masticatory plane in relation to the main plane of the structure. Fig. 8: The project of the bar continues, verifying all the details before sending the file, even the choice of the kind of anchor should be carefully evaluated according to the type of structure and the available spaces. Fig. 9: After sending the file, the structure was produced by Fig. 8 the milling centre, and the first check Fig. 9 to be carried out is the precision the lower jaw and the evaluation of all the problems and expectations of the patient, it is planned to produce a full denture anchored to a bar screwed on four implants (Fig. 1). Step by step procedure In the first phase, after the implant surgery guided by a replica of the temporary restoration, the defin- itive impression was taken with a set-up created to restore aesthetics and function (Fig. 2). During the try-in, the template that was prepared in the labo- ratory over the master model was also checked (Fig. 3) in order to verify that there was agreement between the implants and the wax-up. The template was screwed on the implants, and blocked with the resin where it was separated; doing this we can be sure of the implants’ position. The template was returned to the laboratory to check the accuracy of the wax- up’s position and their passivity against the master and passivity test, which was performed on the verification model built with the help of resin jig. Fig. 10: Detail of the structure positioned with the silicone gums, checking the areas around the implants and adjacent to the bar to locate the correct positioning. Fig. 11: After the bar was complete, the silicone of the set-up is positioned and the available spaces are checked. Fig. 12: The possibility of screwing and unscrewing the retentive attachments gives not only the advantage to change them in case of wearing over time but also to change them at any time during the design of the superstructure. Fig. 13: After carrying out all the necessary checks, the structure is finely polished before building the superstructure. Fig. 10 Fig. 11 Fig. 12 Fig. 13 CAD/CAM 1 2017 29