Table 2 Mean and standard deviation (SD) of the measured total micromotion between the femoral-component and the anterior and posterior femoral cortex for the different reconstructive techniques and load cases. P-values obtained from T-tests to test differences between means of the measured micromotions. Finite element (FE) model total micromotion results and relative difference (Dif.) to the measured
Load case | Cortex side | Experimental (DIC) | Finite element model | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total micromotion (μm) | P - values | Total micromotion (μm) | |||||||||||||
Femoral component (A) | Sleeve (B) | Sleeve + Stem (C) | Femoral component (A) versus Sleeve (B) | Femoral component (A) versus Sleeve + Stem (C) | Femoral component (A) | Sleeve (B) | Sleeve + Stem (C) | ||||||||
Mean | SD | Mean | SD | Mean | SD | Value | Dif. FE-DIC | Value | Error FE-DIC | Value | Dif. FE-DIC | ||||
Axial load | Anterior | 10 | 6 | 7 | 3 | 7 | 3 | NS | NS | 11 | + 1 | 9 | + 2 | 8 | + 1 |
Posterior | 39 | 12 | 35 | 8 | 32 | 5 | NS | NS | 42 | + 3 | 38 | + 3 | 30 | −2 | |
Internal-External moment | Anterior | 12 | 6 | 9 | 4 | 8 | 3 | NS | NS | 10 | −2 | 7 | -2 | 9 | + 1 |
Posterior | 10 | 3 | 7 | 3 | 8 | 3 | NS | NS | 12 | + 2 | 9 | + 2 | 7 | −1 | |
Axial load + Internal-External moment | Anterior | 11 | 4 | 11 | 5 | 14 | 4 | NS | NS | 9 | + 2 | 10 | −1 | 8 | −6 |
Posterior | 32 | 9 | 28 | 9 | 32 | 8 | NS | NS | 37 | + 5 | 33 | + 1 | 29 | −7 | |