ArticleJournal of dental research, dental clinics, dental prospects2022
Assessment of marginal gaps and image quality of crowns made of two different restorative materials: An in vitro study using CBCT images.
Article in Journal of dental research, dental clinics, dental prospects, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- CBCT in Dental Research: Is Complexity Necessary? An Exploratory Proof-of-Concept Study.Journal of functional biomaterials · 2026Article
- Evaluation of artifacts in cone-beam computed tomography from different intraradicular pins and cementation materials using different exposure protocols.Imaging science in dentistry · 2026Article
- Evaluation and comparison of contrast-to-noise ratio generated by lithium disilicate and zirconia: A phantom study.Imaging science in dentistry · 2025Article
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5 authors.
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No grant is acknowledged in the PubMed record.
Abstract
Background: The present study assessed the quality of images and the presence of marginal gaps on cone-beam computed tomography (CBCT) images of teeth restored with all-ceramic and metal-ceramic crowns and compared the gap sizes observed on CBCT images with those obtained on micro-CT images. Methods: Thirty teeth restored with metal-ceramic and all-ceramic crowns, properly adapted and with gaps of 0.30 and 0.50 mm, were submitted to micro-CT and CBCT scans. Linear measurements corresponding to the marginal gap (MG) and the absolute marginal discrepancy (AMD) were obtained. The objective assessment of the quality of CBCT images was performed using the contrast-to-noise ratio (CNR), and the subjective assessment was defined by the diagnoses made by five examiners regarding the presence or absence of gaps. Results: The measurements were always higher for CBCT, with a significant difference regarding AMD. No significant difference in image quality was observed using CNR between the crowns tested. Low accuracy and sensitivity values could be observed for both crowns. Conclusion: Marginal mismatch measures were overestimated in CBCT images. No difference in image quality was observed between the crowns. The correct diagnosis of gaps was considered low, irrespective of crown type and gap size.
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