Table 1.

Mean (SD) surface roughness in Sa values before and after scaling with PS or conventional scaler tips

Surface roughness	Mean (SD) µm		Mean difference (SD)	p value	p value
	Before	After
PS (n = 10)	9.8 (4.7)	6.7 (3.3)	3.1 (2.5)	0.005*	0.167
C (n = 10)	10.0 (3.2)	5.3 (3.5)	4.7 (3.3)	0.005*

Intragroup comparison was analysed using Wilcoxon signed-rank test. Intergroup comparison was analysed with independent t test

C conventional tip, PS Perio Slim tip, SD standard deviation

*Statistically significant difference (p < 0.05)