Table 4 Median and standard deviation (± SD) surface roughness (Ra and Rz) for M, SL and C brackets (µm).

From: Analysis of corrosion, surface roughness, and ıon release of orthodontic brackets in simulated gastric acid and saliva

Solations

Bracket

30 min

24 h

1 months

Ra

Rz

Ra

Rz

Ra

Rz

pH 1,5

M

120.6278 ± 9.2462

426.4399 ± 22.305

60.3839 ± 5.9548

405.7220 ± 32.067

49.5938 ± 4.1023

366.4759 ± 29.0443

pH 3,0

M

106.2358 ± 15.8

479.3199 ± 34.2013

38.3112 ± 7.4201

414.5406 ± 99.2032

25.4920 ± 9.2462

317.7922 ± 19.3402

pH 7,0

M

30.0555 ± 4.7023

351.2930 ± 12.3061

39.7910 ± 8.1403

357.3435 ± 23.836

26.2304 ± 4.3563

315.1401 ± 29.4413

pH 1,5

SL

5.4395 ± 09.6465

41.2434 ± 10.9823

1.4066 ± 0.1328

10.3084 ± 2.9356

2.7204 ± 0.0823

7.4982 ± 1.2462

pH 3,0

SL

5.5895 ± 0.1124

31.7315 ± 12.3289

1.6062 ± 0.0324

5.4369 ± 0.0342

1.2515 ± 0.0023

6.4032 ± 0.1202

pH 7,0

SL

3.3325 ± 0.2462

12.1344 ± 1.3209

1.4464 ± 0.0962

3.3474 ± 0.024

0.5477 ± 0.009

2.3779 ± 0.0701

pH 1,5

C

0.0545 ± 0.0003

0.3495 ± 0.0015

0.1470 ± 0.001

1.1632 ± 0.0923

0.1114 ± 0.001

0.9223 ± 0.002

pH 3,0

C

0.1459 ± 0.001

0.9332 ± 0.04

0.2181 ± 0.0023

1.4311 ± 0.05

0.2687 ± 0.004

1.7409 ± 0.008

pH 7,0

C

0.4185 ± 0.04

0.5604 ± 0.01

0.1326 ± 0.003

0.7546 ± 0.0046

0.1080 ± 0.002

0.9287 ± 0.036