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RESEARCH PRODUCT

Marginal and Internal Precision of Zirconia Four-Unit Fixed Partial Denture Frameworks Produced Using Four Milling Systems

Karl Martin LehmannHenning StaedtStefan WentaschekMonika BjelopavlovicPeer W. KaemmererPeter OttlHerbert SchellerMichael Weyhrauch

subject

Molarinternal fitTechnologyCAD02 engineering and technologySystem aArticleCAD/CAM03 medical and health sciencessymbols.namesake0302 clinical medicineFixed partial denturesGeneral Materials ScienceMathematicsOrthodonticsReproducibilityMicroscopyQC120-168.85TQH201-278.5030206 dentistry021001 nanoscience & nanotechnologyEngineering (General). Civil engineering (General)TK1-9971Bonferroni correctionDescriptive and experimental mechanicsFPDsymbolsmarginal fitElectrical engineering. Electronics. Nuclear engineeringTA1-20400210 nano-technologyzirconia

description

Background: CAD/CAM systems enable the production of fixed partial dentures with small and reproducible internal and marginal gaps. Purpose: The purpose of this study was to evaluate the reproducibility of the marginal and internal adaptations of four-unit fixed partial denture frameworks produced using four CAD/CAM systems. Materials and Methods: Prepared dies of a master model that simulated the loss of the first left molar were measured. Fifteen frameworks were manufactured using four CAD/CAM systems (A–D). The internal fit was determined by the replica technique, and the marginal gap was determined by microscopy. ANOVA was carried out to detect significant differences, and the Bonferroni adjustment was performed. The global level of significance was set at 5%. Results: The mean gap size ranged from 84 to 132 µm (SD 43–71 µm). The CAD/CAM systems showed significant variance (p &lt

yearjournalcountryeditionlanguage
2021-05-19Materials
10.3390/ma14102663https://www.mdpi.com/1996-1944/14/10/2663