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Applied Sciences
Volume 11
Issue 22
10.3390/app112210709
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Article

The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System

by
Gil Ben-Izhack
1,*,†,
Asaf Shely
1,†,
Sarit Naishlos
2,†,
Ari Glikman
1,
Liad Frishman
1,
Avi Meirowitz
1,† and
Eran Dolev
1
1
Department of Oral Rehabilitation, Sackler Faculty of Medicine, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
2
Department of Pediatric Dentistry, Sackler Faculty of Medicine, The Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to the study.
Appl. Sci. 2021, 11(22), 10709; https://doi.org/10.3390/app112210709
Submission received: 15 October 2021 / Revised: 10 November 2021 / Accepted: 11 November 2021 / Published: 12 November 2021
(This article belongs to the Collection State-of-the-Art Dentistry and Oral Health)
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Abstract

Background: This study compared the influence of three different radial spacers (60,90,120 microns) on the marginal gap adaptation by using computer-aided manufacturing (CAD-CAM) for producing monolithic zirconia reinforced lithium silicate (ZLS) ceramic crowns. Methods: A total of 45 abutment acrylic teeth were divided into three groups of different radial spacers (60, 90, and 120 microns). In each group 15 teeth were scanned by Omnicam intra oral scanner and ZLS crowns were ground. For each unit the marginal gap was evaluated at four regions of interest by scanning electronic microscope (SEM). To compare the marginal gap between the three groups a one-way ANOVA with post-hoc Bonferroni test was preformed (α = 0.05). Results: The marginal gap for a 60 microns (162.99 ± 16.25 µm) radial spacer was found significantly higher than 90 (41.85 ± 3.57 µm) and 120 (41.85 ± 5.3 µm) microns radial spacers (p < 0.05). Between 90- and 120-micron radial spacers no difference was obtained. (p < 0.05). Conclusions: A radial spacer of 60 microns showed a significantly higher marginal gap compared to 90 and 120 microns and was not clinically accepted (>120 microns). For both 90 and 120 microns the marginal gap was clinically accepted (<120 microns) with no difference between the groups. The radial spacer which should be optimum for CELTRA® DUO crowns is 90 microns.
Keywords: CAD-CAM; radial spacer; digital spacer; ZLS; marginal fit; marginal gap; CEREC; marginal discrepancy; SEM CAD-CAM; radial spacer; digital spacer; ZLS; marginal fit; marginal gap; CEREC; marginal discrepancy; SEM

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MDPI and ACS Style

Ben-Izhack, G.; Shely, A.; Naishlos, S.; Glikman, A.; Frishman, L.; Meirowitz, A.; Dolev, E. The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System. Appl. Sci. 2021, 11, 10709. https://doi.org/10.3390/app112210709

AMA Style

Ben-Izhack G, Shely A, Naishlos S, Glikman A, Frishman L, Meirowitz A, Dolev E. The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System. Applied Sciences. 2021; 11(22):10709. https://doi.org/10.3390/app112210709

Chicago/Turabian Style

Ben-Izhack, Gil, Asaf Shely, Sarit Naishlos, Ari Glikman, Liad Frishman, Avi Meirowitz, and Eran Dolev. 2021. "The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System" Applied Sciences 11, no. 22: 10709. https://doi.org/10.3390/app112210709

APA Style

Ben-Izhack, G., Shely, A., Naishlos, S., Glikman, A., Frishman, L., Meirowitz, A., & Dolev, E. (2021). The Influence of Three Different Digital Cement Spacers on the Marginal Gap Adaptation of Zirconia-Reinforced Lithium Silicate Crowns Fabricated by CAD-CAM System. Applied Sciences, 11(22), 10709. https://doi.org/10.3390/app112210709

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