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Effect of Material Type and Cement Space Thickness on Marginal Discrepancy of Restoration Using a Micro-Ct Scanner Publisher



Mosharraf R1 ; Azizi A1 ; Naziri B1 ; Abolhasani M1
Authors
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Authors Affiliations
  1. 1. Department of Prosthodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran

Source: Pesquisa Brasileira em Odontopediatria e Clinica Integrada Published:2019


Abstract

Objective: To investigate the effect of cement space and the type of restoration on the marginal discrepancy. Material and Methods: Twenty maxillary left first molars were used to fabricate a full crown. Two types of restorations of monolithic zirconia and Sintron were utilized to make a full crown. Samples from each group were scanned by a dental laboratory 3D scanner and designed and processed using CAD-CAM. The samples were divided into four groups of five with 30-and 50-micron cement spaces. In order to verify the vertical marginal discrepancy, the crowns were fitted on their respective teeth without using any mediator and examined by a micro-CT scanner. Data were analyzed by SPSS software. Results: The marginal discrepancy in the monolithic zirconia was less than that of Sintron. The monolithic zirconia with 50-micron cement space showed the minimum marginal discrepancy, as well as cement space in Sintron had no significant effect on the marginal discrepancy. Conclusion: Cement space and material types affect the marginal discrepancy of restorations fabricated by the digital method. © 2019, Association of Support to Oral Health Research (APESB). All rights reserved.
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