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Marginal gap and internal fit of 3D printed versus milled monolithic zirconia crowns

Authors :
Ashraf Refaie
Ahmed Fouda
Christoph Bourauel
Lamia Singer
Source :
BMC Oral Health, Vol 23, Iss 1, Pp 1-7 (2023)
Publication Year :
2023
Publisher :
BMC, 2023.

Abstract

Abstract Background This study aimed to evaluate and compare the marginal gap using two different methods and the internal fit of 3D printed and zirconia crowns. Methods 3Y-TZP zirconia crowns (n = 20) were manufactured using subtractive milling (group M) and 3D printed (group P). The marginal gap was measured at 60 points using vertical marginal gap technique (VMGT). On the other hand, the silicone replica technique (SRT) was used to evaluate the internal fit and was divided into 4 groups: marginal gap, cervical gap, axial gap, and occlusal gap where the thickness of light impression was measured at 16 references. The numerical data was tested for normality using Shapiro–Wilk's test. They were found to be normally distributed and were analyzed using an independent t-test. Results Using VMGT, group P had significantly higher mean marginal gap values of 80 ± 30 µm compared to group M = 60 ± 20 µm (p

Details

Language :
English
ISSN :
14726831
Volume :
23
Issue :
1
Database :
Directory of Open Access Journals
Journal :
BMC Oral Health
Publication Type :
Academic Journal
Accession number :
edsdoj.6162ea673f84803aeccd57c1dd1ac26
Document Type :
article
Full Text :
https://doi.org/10.1186/s12903-023-03184-8