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Marginal Adaptation of Zirconia Complete-Coverage Fixed Dental Restorations Made From Digital Scans or Conventional Impressions: A Systematic Review and Meta-Analysis Publisher Pubmed



Tabesh M1 ; Nejatidanesh F2 ; Savabi G3 ; Davoudi A4 ; Savabi O5 ; Mirmohammadi H6
Authors
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Authors Affiliations
  1. 1. Research Assistant, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Professor of Prosthodontics, Dental Materials Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Research Assistant, Dental Materials Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Post graduate student of Prosthodontics, Dental Implants Research Center and Student Research Committee, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  5. 5. Professor of Prosthodontics, Dental Research Center, Dental Research Institute, Isfahan University of Medical Sciences, Isfahan, Iran
  6. 6. Researcher, Department of Cariology Endodontology, Academic Centre for Dentistry Amsterdam (ACTA), Universiteit van Amsterdam and Vrije Universiteit, Amsterdam, Netherlands

Source: Journal of Prosthetic Dentistry Published:2021


Abstract

Statement of problem: Intraoral scanners have been increasingly used in recent years. However, the accuracy of digital scans as it affects marginal adaptation is unclear. Purpose: The purpose of this systematic review and meta-analysis was to compare the marginal adaptation of single-unit zirconia crowns fabricated with digital scans or with conventional impressions. Material and methods: The electronic databases PubMed (MEDLINE), Cochrane Central Register of Controlled Trials (CENTRAL), Web of Science (ISI), Scopus, and EMBASE were searched and complemented by a manual search. Risks of bias were assessed by using a modified methodological index for nonrandomized studies (MINORS). Mean ±standard deviation (SD) values of marginal accuracy of studies were extracted for both methods. Mean marginal difference and 95% confidence interval (CI) were calculated to evaluate the marginal accuracy of each method. Pooled data were statistically analyzed by using a random-effect model. Results: Seventeen studies were used to perform the meta-analysis. Subgroup analysis was performed based on intraoral scanners. Standardized mean marginal difference and 95% CI of each subgroup were as follows: Lava: -0.85 μm (95% CI: -1.67, -0.03) (P=.043); CEREC: -1.32 μm (95% CI: -2.06, -0.59) (P<.001); iTero: -0.44 μm (95% CI: -1.35, 0.47) (P=.338); TRIOS: -1.26 μm (95% CI: -2.02, -0.51) (P=.001); unknown scanner: -0.21 μm (95% CI: -1.14, 0.72); all studies: -0.89 μm (95% CI: -1.24, -0.54) (P<.001). Conclusions: Digital scanning of prepared teeth for single-unit zirconia restorations resulted in better marginal accuracy than conventional techniques using elastomeric impression materials. © 2020 Editorial Council for the Journal of Prosthetic Dentistry
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