Table 3: Mean root volumes of the maxillary incisors in the LIPUS group at T0 and T1.
| Tooth | Group | Mean root volume at T0 ±SD (mm3) | Mean root volume at T1 ±SD (mm3) | Mean difference T1-T0 (mm3) | SD of the mean difference | P value |
|---|---|---|---|---|---|---|
| Right lateral incisor | LIPUS | 162.32 ± 30.85 | 158.65 ± 31.41 | -3.67 | 10.47 | 0.124 |
| Right central incisor | LIPUS | 222.97 ± 51.52 | 217.94 ± 52.01 | -5.03 | 13.16 | 0.095 |
| Left central incisor | LIPUS | 226.61 ± 55.55 | 219.29 ± 55.62 | -7.32 | 11.66 | 0.009* |
| Left lateral incisor | LIPUS | 161.03 ± 27.55 | 157.53 ± 24.24 | -3.50 | 11.86 | 0.192 |
T0: Pretreatment. T1: Post-treatment. LIPUS: Low-intensity pulsed ultrasound. SD: Standard deviation. *Statistically significant (p<0.05) based on paired t-tests.