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Table 1 Mean and Standard Deviation of recorded acoustic impedance values for each region and irradiation dose obtained by 320 MHz Scanning Acoustic Microscopy (SAM). The statistically significant irradiated groups were marked with the asterisk a

From: Acoustic diagnosis of elastic properties of human tooth by 320 MHz scanning acoustic microscopy after radiotherapy treatment for head and neck cancer

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

  1. aSignificant difference
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Radiation Oncology

ISSN: 1748-717X

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