Table 2.
Results of finite element analyses of the three models.
| Outcome variable | Intact foot | TAA | TTR |
|---|---|---|---|
| Talocrural joint motion (degrees) | |||
| Sagittal RoM | 10.75 | 8.45 | 13.66 |
| Frontal RoM | 8.40 | 6.47 | 10.56 |
| Transverse RoM | 4.34 | 2.96 | 4.78 |
| Peak dorsiflexion | 5.87 | 5.07 | 7.13 |
| Peak eversion | 5.95 | 5.91 | 6.33 |
| Peak abduction | 4.35 | 2.75 | 3.95 |
| MTP joint motion (degrees) | |||
| Sagittal RoM | 10.19 | 10.22 | 9.34 |
| Peak dorsiflexion | 9.84 | 10.14 | 8.75 |
| Segment kinematics (degrees) | |||
| Peak midfoot movement | 11.26 | 11.11 | 10.01 |
| Peak MLLA | 134.18 | 135.37 | 134.01 |
| Peak joint contact force (N) | |||
| Midtarsal joint | 832.20 | 921.51 | 981.35 |
| Lisfranc joint (medial column) | 66.26 | 93.81 | 89.59 |
| Lisfranc joint (central column) | 279.97 | 184.22 | 223.32 |
| Lisfranc joint (lateral column) | 222.73 | 352.42 | 433.27 |
| Peak plantar pressure (MPa) | |||
| Rearfoot | 187.10 | 191.93 | 183.27 |
| Midfoot | 124.93 | 109.45 | 99.67 |
| Forefoot | 781.87 | 839.43 | 777.47 |
TAA: total ankle arthroplasty; TTR: total talus replacement.