Table 3.
Percentage values of strain-shielding caused by the presence of either a cemented intramedullary implant or an extracortical implant (relative to an intact state), displayed under a variety of loading conditions.
| Surface | Load case | Medial load weighting (%) | Mean ± SD strain-shielding (%) |
|||
|---|---|---|---|---|---|---|
| Intramedullary component |
Extracortical component |
|||||
| Proximal region | Middle region | Proximal region | Middle region | |||
| Medial | Gait (3.0BW = 2030 N) | 70 | 45 ± 37 | 47 ± 29 | N/a | 8 ± 27 |
| 50 | 38 ± 31 | 37 ± 25 | N/a | −8 ± 48 | ||
| Stair ascent (3.6 BW = 2470 N) | 70 | 44 ± 35 | 46 ± 27 | N/a | 8 ± 26 | |
| 50 | 49 ± 32 | 40 ± 26 | N/a | −7 ± 42 | ||
| Posterior | Gait (3.0 BW = 2030 N) | 70 | 47 ± 13 | 56 ± 14 | 23 ± 29 | 19 ± 29 |
| 50 | 41 ± 20 | 47 ± 17 | 22 ± 22 | 17 ± 17 | ||
| Stair ascent (3.6 BW = 2470 N) | 70 | 44 ± 12 | 53 ± 13 | 27 ± 30 | 17 ± 27 | |
| 50 | 39 ± 18 | 46 ± 15 | 19 ± 20 | 15 ± 16 | ||