Table 1 P-values obtained from T-tests to test differences between the means of the minimal (ε2) and the maximal (ε1) principal strains. For a level of significance α, statistically significant differences will be detected when p-value< 0.05
Load case | Strain gauge | Femoral component (A) versus Sleeve (B) | Femoral component (A) versus Sleeve + Stem (C) | |||
|---|---|---|---|---|---|---|
ɛ2 (minimal) | ɛ1 (maximal) | ɛ2 (minimal) | ɛ1 (maximal) | |||
Axial load | Medial distal | Md | 0,002 (P < 0.01) | 0,02 (P < 0.05) | 0,004 (P < 0.01) | 0,005 (P < 0.01) |
Medial proximal | Mp | NS | NS | NS | NS | |
Posterior | P | NS | NS | 0,008 (P < 0.01) | 0,01 (P < 0.05) | |
Lateral distal | Ld | NS | NS | 0,001 (P < 0.01) | 0,001 (P < 0.01) | |
Lateral proximal | Lp | 0,01 (P < 0.05) | NS | 0,02 (P < 0.05) | 0,004 (P < 0.01) | |
Anterior | A | NS | NS | NS | 0,001 (P < 0.01) | |
Internal-External moment | Medial distal | Md | NS | NS | NS | 0,01 (P < 0.05) |
Medial proximal | Mp | NS | NS | NS | NS | |
Posterior | P | NS | NS | NS | NS | |
Lateral distal | Ld | NS | NS | NS | NS | |
Lateral proximal | Lp | 0,02 (P < 0.05) | 0,001 (P < 0.01) | NS | NS | |
Anterior | A | NS | NS | NS | NS | |
Axial load + Internal-External moment | Medial distal | Md | 0,01 (P < 0.05) | NS | 0,002 (P < 0.01) | 0,003 (P < 0.01) |
Medial proximal | Mp | NS | 0,04 (P < 0,05) | 0,04 (P < 0.05) | NS | |
Posterior | P | NS | NS | 0,002 (P < 0.01) | NS | |
Lateral distal | Ld | NS | NS | 0,02 (P < 0.05) | 0,002 (P < 0.01) | |
Lateral proximal | Lp | NS | NS | NS | NS | |
Anterior | A | NS | NS | 0,04 (P < 0.05) | 0,001 (P < 0.01) | |