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Implants

36 I I research_ Impression and registration implants1_2013 full denture was achieved by using a du- plicate as a custom tray for the impression. Therefore, it was not necessary to repeat all the steps usually needed for recording the interocclusal relationship, eg wax-up, etc., at the time of the fabrication of the final restoration. If an open-tray impression is preferred, only minor changes to the procedure are necessary. This method is based on a pre- vious publication.12 In cases such as this, it is advisable to fabricate two DentDus. The impression can be taken by the first DentDu; the second DentDu is used for the remain- ing steps. Customised abutments are ap- plied instead of a bar, galvano copings allow a precise transfer coping, and secondary telescopes as well as different technologies are employed for the transfer of implant positions and for the construction of the superstructure. Customised implant abutments allows for better angulations and shape, for im- proved occlusal force transmission from the crown to the implant and the bone, and also for facilitating the fabrication of an aesthet- ically pleasing implant-supported denture. Ways in which abutment design contributes to improved aesthetics include changes in the location of the crown and changes in the dimension and/or form of the restor- ative platform. Additionally, features of the abutment design contribute to the health and dimen- sional stability of the soft tissue. Current attempts to objectively define implant- restoration aesthetics have focused on pe- riimplant mucosal parameters.13,14 The in- troduction of the UCLA abutment provided a custom solution for implant restorations. This direct-to-implant restoration con- Fig. 12a Fig. 12b Fig. 12c Fig. 13a Fig. 13b Fig. 13c Fig. 14 Figs 12a–c_A case of fixed-implant retained denture for the maxilla full-arch rehabilitation, right site (a), anterior area (b), left site (c). Figs. 13a–c_Impression of a case with natural dentition (teeth #11 and #12) and implants. Master cast in the articulator with a duplicate of the over-denture in place (b). Gold copings fixed on the remaining teeth #11 and #12 and customised implant abutments mounted on the implants (both of them served as primary telescopes (c). Fig. 14_DentDu modified for open- tray impression technique.