Abstract
Statement of problem
Lithium disilicate crowns can be manufactured by computer-aided design and computer-aided
manufacturing (CAD-CAM) or with the heat-pressed technique. The outcome of studies
comparing the effect of the manufacturing method on the marginal adaptation of these
crowns is not clear.
Purpose
The purpose of this systematic review and meta-analysis was to investigate the effect
of the CAD-CAM system and pressing technique on the marginal adaptation of lithium
disilicate crowns.
Material and methods
This study followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses
(PRISMA) statement. A literature research was conducted in MEDLINE via PubMed and
Scopus databases, relevant journal sites, and the authors’ collected references, from
January 2009 to April 2019.
Results
The electronic and manual searches that could be read in full totaled 24 studies;
of which, 9 were included in the systematic review and meta-analysis, 7 of which were
in vitro and 2 in vivo. Statistical analyses were conducted by using Review Manager
software program. Meta-analyses were performed with the random effects model (α=.05).
In vitro studies showed no difference in the manufacturing (P>.001; 95% confidence interval -0.687 to 0.632), and no significant difference was
found for in vivo studies (P=.7, 95% confidence interval 0.00 to 54.77). In the joint analysis of the in vivo
and in vitro articles, there was a significant difference between the manufacturing
methods (P<.001).
Conclusions
Differences were detected between the marginal adaptation of lithium disilicate crowns
fabricated with the CAD-CAM system and the pressing technique, but the accuracy values
were clinically acceptable.
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Article info
Publication history
Published online: June 16, 2021
Footnotes
This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.
Identification
Copyright
© 2021 by the Editorial Council for the Journal of Prosthetic Dentistry.
