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Boxplots of volumetric distortions considering windowing adjustments (W1 and W2) and MAR condition (Off – without MAR; On – with MAR) obtained for each material and CBCT unit. Am—amalgam alloy; CoCr—cobalt-chromium; Gu—gutta-percha; Ti—titanium; Zi—zirconium. Outliers are highlighted. The black dotted line at zero represents the absence of volumetric alteration.
