Progress in Orthodontics

Table 1 Means, standard deviation, and t test results of surface roughness measurements (nm = nano meters) for both groups

From: Bionic effects of nano hydroxyapatite dentifrice on demineralised surface of enamel post orthodontic debonding: in-vivo split mouth study

Variable	Groups	N	Mean ± SD (nm)	p value
Ra	Group I	30	90.47 ± 6.58	< 0.001***
	Group II	30	28.53 ± 6.13
Rq	Group I	30	101.16 ± 8.30	< 0.001***
	Group II	30	27.56 ± 6.03
Rz	Group I	30	716.55 ± 70.16	< 0.001***
	Group II	30	278.25 ± 59.11

***Statistically significant

Back to article page