Table 1.
Error analysis by virtual simulation
| Difference in opening angle between radiographs | Anteversion | Error (mm) | |
|---|---|---|---|
| No error correction applied | Error correction applied | ||
| 10° | 0° and 10° | 0.18 (0.15–0.27) | 0.10 (0–0.27) |
| 10° and 20° | 0.45* | 0.10 (0–0.27) | |
| 20° and 30° | 0.74* | 0.10 (0–0.27) | |
| 30° and 40° | 1.00* | 0.10 (0–0.27) | |
| 40° and 50° | 1.23* | 0.10 (0–0.27) | |
| 50° and 60° | 1.43* | 0.10 (0–0.27) | |
| 60° and 70° | 1.58* | 0.10 (0–0.27) | |
| Mean | 0.94 | 0.10 | |
| 20° | 0° and 20° | 0.60* | 0.10 (0–0.27) |
| 10° and 30° | 1.19* | 0.10 (0–0.27) | |
| 20° and 40° | 1.74* | 0.10 (0–0.27) | |
| 30° and 50° | 2.23* | 0.10 (0–0.27) | |
| 40° and 60° | 2.66* | 0.10 (0–0.27) | |
| 50° and 70° | 3.01* | 0.10 (0–0.27) | |
| Mean | 1.91 | 0.10 | |
| 30° | 0° and 30° | 1.34* | 0.10 (0–0.27) |
| 10° and 40° | 2.19* | 0.10 (0–0.27) | |
| 20° and 50° | 2.97* | 0.10 (0–0.27) | |
| 30° and 60° | 3.66* | 0.10 (0–0.27) | |
| 40° and 70° | 4.24* | 0.10 (0–0.27) | |
| Mean | 2.88 | 0.10 | |
| Overall mean | 1.80 | 0.10 | |
Each given error is a mean of the absolute errors at 0°, 10°, 20°, and 30° out-of-plane wear, thus indicating the degree of failure to meet the model assumption of using the correct plane of wear; *all values were equal in this series.