Table 3.
Loading boundaries including minimum (Min) and maximum (Max) magnitude of forces (F) expressed in %BW and N, and moments (M) expressed in %BWm and Nm, on the anteroposterior (AP), mediolateral (ML), and long (LG) axes of the implant fitted with usual (USU) and Free-Flow (FFF) feet during activities of daily living.
| Level walking | Ascending ramp | Descending ramp | Ascending stairs | Descending stairs | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | |||
| USU | ||||||||||||
| F | AP | (%BW) | −16 | 39 | −12 | 40 | −20 | 48 | −15 | 42 | −17 | 33 |
| F | ML | (%BW) | −8 | 14 | −4 | 12 | −6 | 12 | −5 | 15 | −9 | 17 |
| F | LG | (%BW) | −12 | 111 | −11 | 110 | −22 | 109 | −21 | 106 | −11 | 112 |
| M | AP | (%BWm) | −1.91 | 0.80 | −1.51 | 0.78 | −2.20 | 0.45 | −0.84 | 1.39 | −1.53 | 0.68 |
| M | ML | (%BWm) | −3.01 | 9.78 | −0.73 | 13.17 | −4.25 | 5.23 | −0.70 | 10.46 | −2.36 | 8.03 |
| M | LG | (%BWm) | −0.80 | 0.82 | −0.63 | 0.87 | −0.66 | 0.52 | −1.01 | 0.89 | −0.76 | 1.18 |
| F | AP | (N) | −107.75 | 344.96 | −66.42 | 425.92 | −214.58 | 383.37 | −84.77 | 450.96 | −96.25 | 311.56 |
| F | ML | (N) | −63.93 | 152.15 | −32.19 | 128.35 | −46.99 | 133.76 | −38.89 | 162.73 | −74.84 | 179.10 |
| F | LG | (N) | −96.08 | 1,129.25 | −60.73 | 1,109.52 | −175.22 | 1,170.03 | −118.59 | 1,133.99 | −60.35 | 1,070.45 |
| M | AP | (Nm) | −19.60 | 8.56 | −8.54 | 8.37 | −23.54 | 4.79 | −6.76 | 9.55 | −9.01 | 7.30 |
| M | ML | (Nm) | −26.23 | 104.64 | −7.85 | 140.95 | −45.49 | 42.68 | −5.53 | 111.94 | −13.37 | 85.95 |
| M | LG | (Nm) | −8.52 | 8.75 | −5.01 | 9.33 | −7.01 | 4.26 | −8.13 | 9.50 | −6.10 | 12.59 |
| FFF | ||||||||||||
| F | AP | (%BW) | −13 | 41 | −10 | 48 | −15 | 48 | −14 | 39 | −11 | 39 |
| F | ML | (%BW) | −8 | 14 | −4 | 14 | −6 | 14 | −5 | 13 | −9 | 16 |
| F | LG | (%BW) | −24 | 107 | −6 | 109 | −22 | 110 | −3 | 107 | −13 | 107 |
| M | AP | (%BWm) | −1.77 | 1.11 | −2.05 | 0.46 | −1.89 | 0.34 | −1.14 | 1.31 | −1.47 | 1.38 |
| M | ML | (%BWm) | −3.23 | 8.22 | −0.81 | 12.02 | −3.72 | 5.23 | −0.72 | 7.59 | −1.23 | 6.49 |
| M | LG | (%BWm) | −0.54 | 0.69 | −0.55 | 1.08 | −0.55 | 0.62 | −0.75 | 1.19 | −0.97 | 0.90 |
| F | AP | (N) | −80.06 | 329.36 | −54.04 | 386.60 | −137.04 | 383.37 | −80.55 | 312.89 | −64.72 | 314.31 |
| F | ML | (N) | −66.25 | 152.52 | −34.75 | 148.01 | −46.99 | 150.37 | −36.75 | 143.76 | −71.68 | 169.28 |
| F | LG | (N) | −251.75 | 1,091.39 | −59.06 | 1,103.56 | −175.22 | 1,178.84 | −28.02 | 1,141.42 | −107.35 | 1,074.47 |
| M | AP | (Nm) | −15.92 | 8.91 | −11.63 | 4.75 | −20.19 | 3.53 | −8.37 | 10.49 | −15.72 | 11.01 |
| M | ML | (Nm) | −25.82 | 72.23 | −6.46 | 102.87 | −38.48 | 52.78 | −4.39 | 81.29 | −9.42 | 67.35 |
| M | LG | (Nm) | −5.83 | 5.86 | −4.37 | 11.56 | −5.86 | 6.69 | −7.32 | 9.54 | −7.76 | 9.67 |
| Difference | ||||||||||||
| F | AP | (%BW) | 3 | 2 | 2 | 9 | 5 | 0 | 1 | −3 | 6 | 6 |
| F | ML | (%BW) | 0 | 0 | 0 | 2 | 0 | 2 | 0 | −2 | 0 | −1 |
| F | LG | (%BW) | −12 | −4 | 4 | −1 | 0 | 1 | 17 | 1 | −3 | −5 |
| M | AP | (%BWm) | 0.15 | 0.31 | −0.54 | −0.32 | 0.31 | −0.11 | −0.29 | −0.08 | 0.06 | 0.70 |
| M | ML | (%BWm) | −0.22 | −1.55 | −0.07 | −1.15 | 0.53 | 0.00 | −0.03 | −2.86 | 1.13 | −1.53 |
| M | LG | (%BWm) | 0.25 | −0.13 | 0.08 | 0.21 | 0.11 | 0.10 | 0.26 | 0.30 | −0.21 | −0.27 |
| F | AP | (N) | 27.69 | −15.60 | 12.39 | −39.32 | 77.55 | 0.00 | 4.22 | −138.07 | 31.53 | 2.75 |
| F | ML | (N) | −2.32 | 0.37 | −2.56 | 19.66 | 0.00 | 16.61 | 2.14 | −18.97 | 3.15 | −9.82 |
| F | LG | (N) | −155.67 | −37.86 | 1.67 | −5.95 | 0.00 | 8.81 | 90.57 | 7.43 | −46.99 | 4.02 |
| M | AP | (Nm) | 3.68 | 0.34 | −3.09 | −3.62 | 3.35 | −1.26 | −1.62 | 0.94 | −6.71 | 3.71 |
| M | ML | (Nm) | 0.41 | −32.41 | 1.39 | −38.08 | 7.00 | 10.09 | 1.15 | −30.65 | 3.95 | −18.60 |
| M | LG | (Nm) | 2.69 | −2.89 | 0.65 | 2.23 | 1.15 | 2.43 | 0.82 | 0.04 | −1.66 | −2.92 |