Sub groups Time point Main groups Mean SD t-value p-value Sub group 1 Before Group 1 0.02 0.01 0.4472 0.6666     Group 2 0.02 0.01       1st day Group 1 0.02 0.01 0.4472 0.6666     Group 2 0.02 0.01       14th day Group 1 0.02 0.01 0.4472 0.6666     Group 2 0.02 0.01     Sub group 2 Before Group 1 0.03 0.01 0.7184 0.4785     Group 2 0.04 0.01       1st day Group 1 0.04 0.01 0.2963 0.7692     Group 2 0.04 0.01       14th day Group 1 0.04 0.02 1.0493 0.3030     Group 2 0.05 0.01     Sub group 3 Before Group 1 0.03 0.01 -0.7135 0.4814     Group 2 0.03 0.01       1st day Group 1 0.04 0.01 1.0583 0.2990     Group 2 0.05 0.01       14th day Group 1 0.05 0.01 -1.5110 0.1420     Group 2 0.06 0.01

Table1: Comparison of Group 1 and Group 2 in Sub Group 1, 2, 3 With Respect To Surface Roughness at Before Treatment, 1st Day and 14th Day by T Test