Table 3:

Comparison of hardness test (kgf/mm²) at 1 week and after 1 month in three different layers of dentin

Layers	At 1 week	After 1 month	95% CI	p-value
Group I
Sound	559.20 ± 179.09	548.00 ± 132.52	−136.81–159.21	0.87
Affected	235.93 ± 83.16	250.00 ± 92.01	−96.46–68.32	0.72
Infected	34.60 ± 17.21	214.00 ± 89.06	−239.66 to −119.13	<0.001**
Group II
Sound	637.93 ± 185.72	657.00 ± 121.90	−166.66–128.52	0.79
Affected	249.98 ± 93.16	275.95 ± 82.61	−108.69–56.75	0.52
Infected	36.89 ± 12.07	218.00 ± 75.17	−231.69 to −130.53	<0.001**
Group III
Sound	748.00 ± 108.37	752.00 ± 85.63	−95.52–87.52	0.93
Affected	289.00 ± 101.74	294.00 ± 94.53	−97.26–87.26	0.91
Infected	39.89 ± 12.69	231.00 ± 98.86	−257.33 to −124.89	<0.001**

Data were presented as mean ± SD. Mean were compared by using t-test, CI, confidence interval, **, p < 0.001 highly significant