Table 2.
Results of surface and depth microhardness and degree of cure of the studied composites.
| Resin composite | MT (mm) | IT (sec) | N | MTH (Kg/mm2) | SD | MBH (Kg/mm2) | SD | DC(%) | SD |
|---|---|---|---|---|---|---|---|---|---|
| Universal (Tetric N Ceram) | 2 | 20 | 8 | 44.51 | 2.54 | 33.98 | 1.91 | 76.52 | 5.36 |
| 40 | 8 | 45.72 | 2.69 | 35.38 | 1.43 | 77.68 | 6.51 | ||
| Total | 16 | 45.12 | 2.60 | 34.68 | 1.79 | 77.10 | 5.80 | ||
| 4 | 20 | 8 | 44.42 | 2.40 | 29.97 | 3.48 | 67.91 | 10.44 | |
| 40 | 8 | 45.31 | 2.21 | 33.36 | 3.35 | 73.82 | 8.70 | ||
| Total | 16 | 44.87 | 2.28 | 31.67 | 3.74 | 70.87 | 9.78 | ||
| 6 | 20 | 8 | 44.71 | 2.44 | 28.16 | 2.19 | 63.07 | 4.81 | |
| 40 | 8 | 46.63 | 3.10 | 32.31 | 2.89 | 69.65 | 8.58 | ||
| Total | 16 | 45.67 | 2.87 | 30.24 | 3.28 | 66.36 | 7.53 | ||
| bulk fill (Tetric N Ceram Bulk Fill) | 2 | 20 | 8 | 44.88 | 3.10 | 40.74 | 3.74 | 90.95 | 8.06 |
| 40 | 8 | 46.03 | 6.81 | 42.63 | 3.09 | 94.58 | 17.35 | ||
| Total | 16 | 45.46 | 5.15 | 41.69 | 3.46 | 92.77 | 13.20 | ||
| 4 | 20 | 8 | 44.97 | 2.98 | 34.64 | 2.19 | 77.42 | 8.16 | |
| 40 | 8 | 46.25 | 1.40 | 36.04 | 2.33 | 78.08 | 6.80 | ||
| Total | 16 | 45.61 | 2.35 | 35.35 | 2.30 | 77.76 | 7.27 | ||
| 6 | 20 | 8 | 45.20 | 3.10 | 29.68 | 2.43 | 65.93 | 7.03 | |
| 40 | 8 | 47.38 | 2.75 | 33.37 | 3.07 | 70.71 | 8.28 | ||
| Total | 16 | 46.29 | 3.05 | 31.53 | 3.29 | 68.33 | 7.83 |
MT= Material thickness, IT= Irradiation time, N= Number of samples, MTH= Mean top surface microhardness, SD=Standard deviation , MBH= Mean bottom surface microhardness and DC= Degree of cure