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The International Journal of Prosthodontics



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Int J Prosthodont 32 (2019), No. 4     15. July 2019
Int J Prosthodont 32 (2019), No. 4  (15.07.2019)

Page 355-357, doi:10.11607/ijp.5912, PubMed:31283814

Does the Misfit Volume of Prosthetic Crowns Differ Before and After Ceramic Application? An In Vitro Radiographic Microtomography Analysis
Seehaber, Karin Astrid / Lopes, Ricardo Tadeu / Pires dos Santos, Thaís Maria / da Fontoura Frasca, Luis Carlos / Rivaldo, Elken Gomes
Purpose: To estimate the misfit volume of zirconia vs metal-ceramic crowns.
Materials and Methods: 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.
Results: The mean misfit volume for metal-ceramic crowns was 8.80 mm3, and for zirconia crowns was 6.76 mm3 (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).
Conclusion: 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.
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