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    The Trueness of additive and Subtractive Zirconia Crowns

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    Author
    Almutairi, Eman Sager
    Advisor
    Masri, Radi, 1975-
    Date
    2021
    Type
    dissertation
    
    Metadata
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    Abstract
    Purpose: To assess the trueness of ceramic crowns fabricated using additive technology compared to crowns fabricated using subtractive technology. Material and methods: single crown was designed using Dental Designer Software. 3D design was used to fabricate milled and printed crowns. All crowns were scanned. Geomagic software was used for analysis. Best Fit and Marginal Fit Alignment used to analyze the 3D accuracy of the crowns. One Way ANOVA used to analyze the data, and p<0.05 was considered significant. Result: Significant differences found between the additively and subtractive manufactured crowns [p=0.003,F=11.172]. Additively manufactured crowns exhibited better trueness than subtractive crowns. For the additively manufactured crowns, the Best fit Alignment showed 42.81±40.8μm deviation, and the Marginal Alignment showed a 43.11 ±38.05μm deviation. For Subtractive manufactured crowns, the deviation in Best Fit Alignment was 62.67 ±50.79μm and in Marginal Alignment was 55.35±48.69μm. Conclusion: Additive technology fulfills surface trueness criteria.
    Description
    University of Maryland, Baltimore. Biomedical Sciences-Dental School. M.S. 2021
    Keyword
    zirconia
    subtractive manufacturing
    Additive manufacturing
    Computer-Aided Design
    Crowns
    Printing, Three-Dimensional
    Identifier to cite or link to this item
    http://hdl.handle.net/10713/20097
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    Theses and Dissertations School of Dentistry
    Theses and Dissertations All Schools

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