Dose | Acoustic Impedance Z (MRayl) | |||||
---|---|---|---|---|---|---|
Enamel | P value | Dentin | P value | |||
Pre-irradiation | Post-irradiation | Pre-irradiation | Post-irradiation | |||
2 Gy (n = 9) | 12.94 ± 0.67 | 12.65 ± 0.43 | >.9999 | 7.94 ± 0.69 | 7.42 ± 0.35 | > 0.9999 |
8 Gy (n = 9) | 11.88 ± 0.35 | .5594 | 7.39 ± 0.27 | > 0.9999 | ||
20 Gy (n = 9) | 11.37 ± 0.63 | .0632 | 6.52 ± 0.43 a | 0.0296 | ||
30 Gy (n = 9) | 7.24 ± 0.18 a | .0002 | 5.71 ± 0.66 a | 0.0006 | ||
60 Gy (n = 9) | 6.49 ± 0.28 a | <.0001 | 4.82 ± 0.53 a | < 0.0001 |