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Table 2 Qualitative analysis of surfaces after electrolysis under different conditions. Three examiners independently scored each surface based on 4 SEM images mean ± SD

From: Investigation of different electrochemical cleaning methods on contaminated healing abutments in vitro: an approach for metal surface decontamination

  Mean roughness score of 4 SEM images per electrolysis of different charges and currents Mean all examiners P value compared to Control
Ex 1 Ex 2 Ex 3
Control 2.00 ± 0.00 2.00 ± 0.00 2.00 ± 0.00 2.00 ± 0.00 -
− 1 A, group I 4.00 ± 0.00 3.00 ± 0.00 3.25 ± 0.50 3.42 ± 0.17 *
− 1.5 A, group I 4.00 ± 0.00 3.75 ± 0.50 4.00 ± 0.00 3.92 ± 0.17 *
+ 1 A, group I 3.25 ± 0.50 3.33 ± 0.58 3.75 ± 0.50 3.44 ± 0.53 *
+ 1.5 A, group I 3.25 ± 0.50 4.00 ± 0.00 3.75 ± 0.50 3.67 ± 0.33 *
− 1 A, group III 2.00 ± 0.50 2.00 ± 0.00 2.00 ± 0.00 2.00 ± 0.17 n.s.
− 1.5 A, group III 4.00 ± 0.00 3.00 ± 0.00 3.00 ± 0.00 3.33 ± 0.00 *
+ 1 A, group III 3.00 ± 0.00 4.00 ± 0.00 3.25 ± 0.50 3.42 ± 0.17 *
+ 1.5 A, group III 3.00 ± 0.00 4.00 ± 0.00 4.00 ± 0.00 3.67 ± 0.00 *
  1. n.s. no significance; *P < 0.05