Table 3.
Volume and surface area measurements after crown-root fusion with IOS and CBCT compared to laser scanning
| Voxel size (mm) | Thresholds (HU) |
Volume | Surface Area | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean Vol ± SD(mm3) | Difference ± SD(mm3) | Deviation%(%) | P-value | Mean SA ± SD(mm3) | Difference ± SD(mm2) | Deviation%(%) | P-value | ||
| 0.3 mm | 800 | 544.96 ± 202.20 | 42.82 ± 16.52 | 8.77% | 0.000 | 433.42 ± 112.06 | 16.52 ± 4.90 | 4.15% | 0.000 |
| 1000 | 535.11 ± 198.25 | 32.90 ± 12.13 | 6.83% | 0.000 | 429.53 ± 112.21 | 12.63 ± 4.11 | 3.16% | 0.000 | |
| 1200 | 525.73 ± 195.56 | 23.52 ± 9.85 | 4.88% | 0.000 | 425.11 ± 111.56 | 8.21 ± 3.92 | 2.07% | 0.000 | |
| 1400 | 516.64 ± 193.10 | 14.43 ± 7.27 | 2.96% | 0.000 | 420.90 ± 111.08 | 4.00 ± 3.95 | 1.01% | 0.000 | |
| 1600 | 508.69 ± 190.92 | 6.48 ± 5.40 | 1.29% | 0.000 | 417.38 ± 110.98 | 0.48 ± 3.68 | 0.12% | 0.197 | |
| 0.15 mm | 800 | 527.17 ± 195.77 | 24.96 ± 7.67 | 5.10% | 0.000 | 427.42 ± 112.24 | 10.53 ± 3.05 | 2.59% | 0.000 |
| 1000 | 519.54 ± 193.36 | 17.33 ± 5.62 | 3.54% | 0.000 | 424.16 ± 111.63 | 7.26 ± 2.64 | 1.79% | 0.000 | |
| 1200 | 512.91 ± 191.38 | 10.70 ± 4.13 | 2.17% | 0.000 | 420.80 ± 111.01 | 3.90 ± 2.05 | 0.97% | 0.000 | |
| 1400 | 505.64 ± 189.44 | 3.43 ± 3.41 | 0.67% | 0.000 | 416.99 ± 110.17 | 0.10 ± 2.40 | 0.05% | 0.513 | |
| 1600 | 498.05 ± 187.19 | -4.15 ± 4.03 | -0.90% | 0.000 | 414.19 ± 110.01 | -2.71 ± 2.26 | -0.66% | 0.000 | |
| laser model | 502.21 ± 188.75 | 416.90 ± 110.95 | |||||||
P-value: Mean crown-root fusion model volume/surface area vs. mean laser model volume/surface area