Table 2.

Cell Proliferation (A) and Viability (B) of Fibroblast Cell Cultures After 24, 48 and 72 h of Treatment with Different Doses of PLLA (0.05, 0.1, 0.5 and 1 mg/ml) Compared with the Control Group

Group/Hours	24	48	72
(A)
Control	0.47±0.04A,C,a	0.61±0.07A,b	0.64±0.08A,b
0.05 mg/mL	0.26±0.05B,a	0.29±0.06B,a	0.30±0.07B,a
0.1 mg/mL	0.40±0.05C,D,a	0.49±0.05C,b	0.48±0.10C,b
0.5 mg/mL	0.34±0.02D,a,c	0.43±0.03C,b	0.40±0.05D,b,c
1 mg/mL	0.46±0.04C,a	0.48±0.05C,a	0.48±0.05C,E,a
(B)
Control	0.29±0.06A,D,a	0.27±0.02A,a	0.40±0.05A,b
0.05 mg/mL	0.16±0.03B,a	0.15±0.04B,a	0.29±0.09B,b
0.1 mg/mL	0.24±0.09C,a	0.17±0.07B,b	0.27±0.06B,a,c
0.5 mg/mL	0.23±0.05C,a	0.29±0.06A,a	0.28±0.08B,a
1 mg/mL	0.32±0.06D,a	0.28±0.05A,a	0.31±0.09B,a

Notes: Different lowercase letters indicate significant differences at different times. Cell proliferation was expressed as number of cells x 10⁴ and cell viability was expressed as arbitrary units (AU). Data were reported as the mean ± SD.