Table 2 Means, standard deviation, and t test results of surface roughness measurements (nm) for the groups

R _a

NanoHAP

19.1 ± 5.4^A

33.4 ± 13.6^B

29.9 ± 12.4^B

28.4 ± 9.9^B

Toothpaste

20.2 ± 7.1^A

34.4 ± 12.4^B

33.4 ± 13.2^B

33.7 ± 12.4^B

P value*

0.62

0.83

0.36

0.21

R _q

NanoHAP

26.3 ± 8.1^A

43.7 ± 15.9^B

35.4 ± 13.3^B

36.7 ± 12.1^B

Toothpaste

27.1 ± 8.7^A

46.9 ± 17.7^B

39.3 ± 14.4^B

39.9 ± 14.5^B

P value*

0.81

0.6

0.44

0.52

R _z

NanoHAP

490.5 ± 188.2^A

782.7 ± 385.8^B

622.0 ± 271.9^B

622.4 ± 260.9^B

Toothpaste

368.0 ± 195.3^A

855.6 ± 434.3^B

700.1 ± 426.1^B

753.1 ± 377.1^B

P value*

0.09

0.49

0.55

0.45