Table 1.
Normal Syndesmotic Position in Neutral Dorsiflexion and Motion From Dorsiflexion to Plantarflexion.
|
Position
|
Motion
|
|||
|---|---|---|---|---|
| Mean (SD) | 95% CI | Mean (SD) | 95% CI | |
| ASD, mm | 3.3 (0.9) | 3.0 to 3.6 | −0.7 (0.5) | −0.9 to −0.5 |
| MSD, mm | 3.4 (0.9) | 3.1 to 3.7 | −1.1 (0.5) | −1.2 to −0.9 |
| PSD, mm | 6.1 (1.2) | 5.7 to 6.5 | −0.8 (0.6) | −1.0 to −0.6 |
| TFCS, mm | 3.9 (0.9) | 3.6 to 4.2 | −1.1 (0.5) | −1.3 to −0.9 |
| TFO, mm | −0.3 (1.3) | −0.7 to 0.1 | 1.1 (0.5) | 0.9 to 1.3 |
| Sagittal translation, mm | 0.5 (1.2) | 0.1 to 0.9 | 0.1 (0.6) | −0.1 to 0.3 |
| Fibular rotation, deg | 18.3 (7.0) | 16.1 to 20.6 | −1.2 (1.6) | −1.7 to −0.7 |
| Syndesmotic area, mm2 | 122 (23) | 115 to130 | −26 (11) | −29 to −22 |
Abbreviations: ASD, anterior syndesmotic distance; MSD, middle, syndesmotic distance; PSD, posterior syndesmotic distance; TFCS, tibiofibular clear space; TFO, tibiofibular overlap.