CAD/CAM - international magazine of digital dentistry

I research _ impression and registration 32 I CAD/CAM 1_2013 therestorationandocclusioncanbemade.Making these changes on the mock-up was easier and less time consuming than making them on the metal frameworkitself,anditwasthenpossibletotrans- fer them directly to the final framework. Further- more, the mock-up almost “splinted” the electro- formedgoldcopingsduringtheimpression,allow- ingfortheexacttransferoftheabutmentposition. At the same time, the vertical height and interoc- clusal relationship were recorded. The delivery of a milledtemporaryrestorationpermittedaslowand non-progressive loading of the implants, which then leads to bone remodeling.16 Abutments were left in place after mounting. Combined with the fabrication of a new cast, this further decreased theriskofinaccuraciesduringthetransferprocess. _Conclusion The method described here can be used for full- arch restorations with both fixed and removable implant supported dentures. Accurate impres- sions can be accomplished and occlusion, vertical dimensions, as well as implant positions can be transferredwhilefacilitatingthefull-archrestora- tion process. In addition, this technique resulted in a reduction of the required chair time Disadvantages of this technique lie in the fact that the quality of laboratory technician’s work meetshigherdemandsthanusual,andthatthecli- nician also needs to acquire some additional skills. Further disadvantages of this method include the needforahighlyqualifiedtechnicallabandhigher technical costs relative to those associated with prefabricated titan implant abutments. To date, this method has not been applied in conjunction with immediate implant loading. However, dentists and patients have come to ex- pect this level of rehabilitative accuracy, precision, long-term success and aesthetics._ Editorial note: A complete list of references is available fromthepublisher. 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 customized implant abutments mounted on the implants (both of them served as primary telescopes (c). Fig. 14_DentDu modified for open-tray impression technique. Prof.Gregory-George Zafiropoulos Blaues Haus Sternstr.61 40479 Düsseldorf,Germany zafiropoulos@prof-zafiropoulos.de www.prof-zafiropoulos.de CAD/CAM_contact Fig. 14 Fig. 13b Fig. 13c Fig. 12b Fig. 12c Fig. 13a Fig. 12a