AI Article Synopsis

  • - The systematic review aimed to explore how the chemical makeup and thickness of monolithic zirconia affect its optical and mechanical properties, using meta-analysis to assess the roles of yttrium and aluminum percentages and specimen thickness.
  • - Following PRISMA guidelines, researchers searched databases for relevant studies published in the last decade, ultimately selecting 26 articles for qualitative synthesis and 24 for quantitative analysis, ensuring the quality of experimental studies was assessed.
  • - The results indicated significant impacts of yttrium, aluminum, and thickness on zirconia's properties, with greater variability observed, which could inform clinicians on selecting appropriate zirconia types for different dental restorations.

Article Abstract

Purpose: This systematic review set out to investigate the influence of chemical composition and specimen thickness of monolithic zirconia on its optical and mechanical properties. Meta-analysis and meta-regression analyzed the effects of variations in percentages of yttrium, aluminum, and specimen thickness of monolithic zirconia.

Study Selection: The review followed recommendations put forward in the PRISMA checklist. An electronic search for relevant articles published up to October 2019 was conducted in the Pubmed, Cochrane, Scopus, Scielo, and Web of Science databases, with no language limits and articles published in the last 10 years. From 167 relevant articles; applying inclusion criteria based on the review's PICO question, 26 articles were selected for qualitative synthesis (systematic review) and 24 for quantitative synthesis (meta-analysis). Experimental in vitro studies published were selected and their quality was assessed using the modified Consort scale for in vitro studies of dental materials.

Results: The variables yttrium, aluminum and thickness were analyzed in random effects models, observing high heterogeneity (>75%), and finding statistically significant influences on the properties of monolithic zirconia (p<0.05).

Conclusion: Within the review's limitations, it may be concluded that variations in the percentage of yttrium and aluminum influence the optical and mechanical properties of monolithic zirconia, making it more or less esthetic and resistant in relation to each variable. The clinical implications of these findings can help select the most appropriate type of zirconia to meet the different clinical needs when restoring different regions (posterior or anterior).

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Source
http://dx.doi.org/10.2186/jpr.JPR_D_20_00218DOI Listing

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