Table 3.
Mean (SD) surface hardness (kg/mm2) of Ketac-S immersed in various storage media over a period of 7 days.
| Mean (SD) surface hardness (kg/mm2) | |||||||
|---|---|---|---|---|---|---|---|
| Storage media | Before immersion | 6 hours | 1 day | 2 days | 3 days | 4 days | 7 days |
| Deionized water | 52.04 (2.39) | 54.60 (2.73) | 57.54 (1.81) | 57.05 (4.79) | 57.84 (5.30) | 57.26 (0.64) | 57.97 (2.58)a |
| Citrate buffer solution | 53.52 (2.45) | 50.73 (1.68) | 41.36 (1.99)* | 29.22 (1.30)* | 28.32 (1.89)* | 27.01 (6.07)* | 26.18 (4.15)*,c |
| Green mango juice | 54.45 (4.97) | 33.54 (1.11)* | 27.75 (0.90)* | Soft and unable for measurement | |||
| Pineapple juice | 53.84 (2.32) | 53.06 (3.77) | 48.97 (3.36) | 47.66 (2.42)* | 39.23 (1.71)* | 35.20 (1.62)* | 31.35 (1.63)*,b |
*
indicates significant difference compared to before immersion for each storage media (in rows) according to Tukey HSD test (P<.05).
a,b,c
indicate significant differences among 4 storage media (in columns) according to Tukey HSD test (P<.05).