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Progress in Orthodontics

Table 2 Comparison of difference in Ra (average roughness) 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 a

Mean baseline roughness

Mean post polishing roughness

Mean difference Ra

Group 1

0.86 μm

3.36 μm

2.50 μm

Group 2

0.95 μm

3.17 μm

2.22 μm

Group 3

0.82 μm

1.99 μm

1.16 μm

Group 4

0.84 μm

4.62 μm

3.78 μm

p value

0.666

< 0.001

< 0.001

  1. Ra average roughness, μm micrometer, p value probability value
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