Fig. 11From: Analysing root roughness and smear layer relationship by comparing contemporary dental curettes with conventional dental curettes: a randomised controlled trialComparison of Smear layer Index of all test instruments with the control group. Smear Layer Index Means represented on Y-Axis. Test Instruments and Control group represented on X-Axis. Grade 1 SLI—Thick and compact smear layer. Grade 2 SLI-Thin smear layer. Grade 3 SLI—Residues of smear debris. Grade 4 SLI—Absence of smear layerBack to article page