Skip to main content


Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Table 4 Comparison of difference in Rz (mean roughness depth) between baseline and post polishing roughness

From: Comparative evaluation of enamel surface roughness after debonding using four finishing and polishing systems for residual resin removal—an in vitro study

R z Mean baseline roughness depth Mean post polishing roughness depth Mean difference Rt
Group 1 2.10 μm 8.19 μm 6.09 μm
Group 2 2.02 μm 8.40 μm 6.38 μm
Group 3 2.11 μm 7.95 μm 5.84 μm
Group 4 2.04 μm 10.93 μm 8.89 μm
p value 0.702 < 0.001 < 0.001
  1. Rz mean roughness depth, μm micrometer, p value probability value