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Table 1 Cytotoxicity of AgNPs in the study groups after 24 hours, 3 and 7 days

From: Investigating the residual effect of silver nanoparticles gel as an intra-canal medicament on dental pulp stromal cells

 

AgNPs 0.01% (n = 18)

AgNPs 0.015% (n = 18)

AgNPs 0.02% (n = 18)

Ca (OH)2 (n = 18)

No treatment (n = 18)

Test (P value)

24 hours

Mean (SD)

7.26 (10.89)

3.99 (8.10)

5.13 (9.22)

1.44 (4.69)

0.54 (1.24)

X2 = 6.032

(0.197)

Median (IQR)

1.00 (21.60)

0.78 (1.93)

0.52 (7.50)

−0.11 (1.99)

0.51 (1.45)

3 days

Mean (SD)

40.32 (2.92)a,b

37.43 (2.61)b,c

34.46 (3.24)c

33.26 (3.19)c

35.36 (4.06)c

F = 6.557 (< 0.001*)

Median (IQR)

40.80 (4.66)

38.22 (4.90)

33.49 (4.05)

32.49 (4.85)

35.44 (7.25)

7 days

Mean (SD)

32.11 (2.55)a

25.26 (2.63)b

24.61 (3.21)b

23.96 (2.44)b

24.88 (3.09)b

F = 2.897 (< 0.001*)

Median (IQR)

32.01 (4.65)

25.66 (3.74)

23.98 (5.15)

23.39 (4.37)

25.35 (4.77)

Test ((P value)

X2 = 29.398 (< 0.001*)

X2 = 27.657 (< 0.001*)

X2 = 28.209 (< 0.001*)

X2 = 29.562 (< 0.001*)

X2 = 28.418 (< 0.001*)

 

Pair wise comparisons

P1 < 0.001*

P1 < 0.001*

P1 < 0.001*

P1 < 0.001*

P1 < 0.001*

P2 = 0.005*

P2 = 0.006*

P2 = 0.009*

P2 = 0.005*

P2 = 0.004*

P3 = 0.231

P3 = 0.228

P3 = 0.181

P3 = 0.210

P3 = 0.263

  1. *Statistically significant different at p value≤0.05
  2. a,b,c different letters denote statistically significant difference between groups at each time point
  3. P1: comparison between 24 hrs and 3 days, P2: comparison between 24 hrs and 7 days, P3: comparison between 3 days and 7 days within each group