Time | Dentin surface region numbers | Chi-square value | p-value | |||
1 | 2 | 3 | 4 | |||
A (0 s) | 3 (152)a | 3 (162) | 3 (158) | 4 (162) | 45.8 | <0.005 |
B (20 s) | 10 (124) | 10 (110) | 12 (104) | 15 (132) |
|
|
C (40 s) | 24 (110) | 28 (120) | 29 (132) | 34 (125) |
|
|
D (60 s) | 90 (103) | 95 (105) | 104 (112) | 101 (112) |
|
|