cad a22 4500 551468246 20191213041408.0 cr unu---uuuuu 181215e20190301xx s 000 0 eng 10.5167/uzh-159415 doi 10.1016/j.prosdent.2018.05.014 doi (ZORA)oai:www.zora.uzh.ch:159415 610 ddc 30396708 pmid Randomized controlled clinical trial of digital and conventional workflows for the fabrication of zirconia-ceramic fixed partial dentures. Part III: Marginal and internal fit [Elektronische Daten] [Goran I Benic, Irena Sailer, Marco Zeltner, Janine N Gütermann, Mutlu Özcan, Sven Mühlemann] openAccess eu-repo STATEMENT OF PROBLEM Trials comparing the overall performances of digital and conventional workflows in restorative dentistry are lacking. PURPOSE The purpose of the third part of this clinical study was to test whether the fit of zirconia 3-unit frameworks for fixed partial dentures fabricated with fully digital workflows differed from that of metal frameworks fabricated with the conventional workflow. MATERIAL AND METHODS In each of 10 participants, 4 fixed-partial-denture frameworks were fabricated for the same abutment teeth according to a randomly generated sequence. Digital workflows were applied for the fabrication of 3 zirconia frameworks with Lava, iTero, and Cerec infiniDent systems. The conventional workflow included a polyether impression, manual waxing, the lost-wax technique, and the casting of a metal framework. The discrepancies between the frameworks and the abutment teeth were registered using the replica technique with polyvinyl siloxane. The dimensions of the marginal discrepancy (Discrepancy) and the internal discrepancy in 4 different regions of interest (Discrepancy, Discrepancy, Discrepancy, and Discrepancy) were assessed using a light microscope. Post hoc t tests with Bonferroni correction were applied to detect differences (α=.05). RESULTS Discrepancy was 96.1 ±61.7 μm for the iTero, 106.9 ±96.0 μm for the Lava, 112.2 ±76.7 μm for the Cerec infiniDent, and 126.5 ±91.0 μm for the conventional workflow. The difference between the iTero and the conventional workflow was statistically significant (P=.029). Discrepancy was 153.5 ±66.8 μm for the iTero, 203.3 ±127.9 μm for the Lava, 179.7 ±63.1 μm for the Cerec infiniDent, and 148.8 ±66.8 μm for the conventional workflow. Discrepancy was significantly lower for the conventional workflow than for the Lava and the Cerec infindent workflows (P<.01). The iTero resulted in significantly lower values of Discrepancy than the Lava and the Cerec infiniDent workflows (P<.01). CONCLUSIONS In terms of framework fit in the region of the shoulder, digitally fabricated zirconia 3-unit frameworks presented similar or better fit than the conventionally fabricated metal frameworks. In the occlusal regions, the conventionally fabricated metal frameworks achieved a more favorable fit than the CAD-CAM zirconia frameworks. Clinic of Reconstructive Dentistry zora Benic Goran I. joint author Sailer Irena joint author Zeltner Marco joint author Gütermann Janine N. joint author Özcan Mutlu joint author Mühlemann Sven joint author Journal of Prosthetic Dentistry 121(3):426-431 https://www.zora.uzh.ch/id/eprint/159415/2/JPD-17-923-formatted.pdf text/html WWW-Backlink auf das Repository 1 Journal Article PeerReviewed zora ZORA 856 40 https://www.zora.uzh.ch/id/eprint/159415/2/JPD-17-923-formatted.pdf text/html WWW-Backlink auf das Repository ZORA 700 1- Benic Goran I. joint author ZORA 700 1- Sailer Irena joint author ZORA 700 1- Zeltner Marco joint author ZORA 700 1- Gütermann Janine N. joint author ZORA 700 1- Özcan Mutlu joint author ZORA 700 1- Mühlemann Sven joint author ZORA 773 0- Journal of Prosthetic Dentistry 121(3):426-431 BK010053 XK010053 XK010000 ZORA ZORA ZORA Journal Article openAccess