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International Journal of Periodontics & Restorative Dentistry



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Int J Periodontics Restorative Dent 39 (2019), No. 1     7. Jan. 2019
Int J Periodontics Restorative Dent 39 (2019), No. 1  (07.01.2019)

Page 39-47, doi:10.11607/prd.3409, PubMed:30543725

The CAD/CAM Compound Prosthesis: Digital Workflow for Fabricating Cement-Retained Zirconia Prosthesis Over Screw-Retained Milled Titanium Bars
Faeghinejad, Meisam / Proussaefs, Periklis / AlHelal, Abdulaziz / Lozada, Jaime
The computer-assisted design/computer-assisted manufactured compound prosthesis involves designing and milling a cement-retained prosthesis over milled titanium bars. In the presented clinical case report, a diagnostic wax pattern was made to assess esthetics, contours, and occlusion. A total of eight maxillary root-form implants were restored by following the combined prosthesis design concept. The mandibular arch was restored with a screwretained implant-supported zirconia fixed prosthesis. A milled polymethyl methacrylate (PMMA) maxillary interim prosthesis was fabricated to intraorally confirm the diagnostic wax pattern. The interim PMMA prosthesis was then scanned, and three screw-retained titanium milled bars were designed that provided the substructure of the definitive restoration. A cement-retained milled zirconia prosthesis was then designed and fabricated. The zirconia prosthesis provided the superstructure of the definitive complete-arch restoration. After confirming esthetics, phonetics, occlusion, and accessibility for oral hygiene, the superstructure was cemented with temporary cement to enable retrievability.
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