Does the Misfit Volume of Prosthetic Crowns Differ Before and After Ceramic Application? An In Vitro Radiographic Microtomography Analysis

To estimate the misfit volume of zirconia vs metal-ceramic crowns. Five specimens were fabricated from zirconia and five from nichrome (metal-ceramic). Microcomputed tomography techniques were used to obtain volumetric reconstructions of misfit volume before and after ceramic application. The mean m...

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Published inThe International journal of prosthodontics Vol. 32; no. 4; p. 355
Main Authors Seehaber, Karin Astrid, Lopes, Ricardo Tadeu, Pires Dos Santos, Thaís Maria, da Fontoura Frasca, Luis Carlos, Rivaldo, Elken Gomes
Format Journal Article
LanguageEnglish
Published United States 01.07.2019
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Summary:To estimate the misfit volume of zirconia vs metal-ceramic crowns. Five specimens were fabricated from zirconia and five from nichrome (metal-ceramic). Microcomputed tomography techniques were used to obtain volumetric reconstructions of misfit volume before and after ceramic application. The mean misfit volume for metal-ceramic crowns was 8.80 mm , and for zirconia crowns was 6.76 mm (P = .003, 95% confidence interval [CI] 0.714 to 3.358). Misfit volume also did not differ significantly before and after ceramic application (metal-ceramic, P = .375, 95% CI 0.513 to 1.363; zirconia, P = .253, 95% CI 0.257 to 0.977). Zirconia crowns had a smaller mean misfit volume than metal-ceramic crowns. The change in misfit volume after ceramic application was minimal and unlikely to be of clinical relevance.
ISSN:1942-4426
DOI:10.11607/ijp.5912