Copyright
©The Author(s) 2021.
World J Clin Cases. Aug 6, 2021; 9(22): 6343-6356
Published online Aug 6, 2021. doi: 10.12998/wjcc.v9.i22.6343
Published online Aug 6, 2021. doi: 10.12998/wjcc.v9.i22.6343
Material | Elastic modulus (Mpa) | Poisson ratio |
Cortical bone | 16800 | 0.29 |
Cancellous bone | 260 | 0.2 |
Internal fixation | 110000 | 0.3 |
Table 2 Grouping according to different models
Normal standing A | Slow walking B | Fast walking C | Stair descent D | |||||||||
Medial defect a | Lateral defect b | Lateral and medial defect c | Medial defect a | Lateral defect b | Lateral and medial defect c | Medial defect a | Lateral defect b | Lateral and medial defect c | Medial defect a | Lateral defect b | Lateral and medial defect c | |
PFNA 1 | 1Aa | 1Ab | 1Ac | 1Ba | 1Bb | 1Bc | 1Ca | 1Cb | 1Cc | 1Da | 1Db | 1Dc |
ITN 2 | 2Aa | 2Ab | 2Ac | 2Ba | 2Bb | 2Bc | 2Ca | 2Cb | 2Cc | 2Da | 2Db | 2Dc |
PFNA + steel wire 3 | 3Aa | 3Ab | 3Ac | 3Ba | 3Bb | 3Bc | 3Ca | 3Cb | 3Cc | 3Da | 3Db | 3Dc |
PFNA + plate 4 | 4Ab | 4Ac | 4Bb | 4Bc | 4Cb | 4Cc | 4Db | 4Dc | ||||
PFNA + steelwire + plate 5 | 5Ab | 5Ac | 5Bb | 5Bc | 5Cb | 5Cc | 5Db | 5Dc |
Table 3 Comparison of the maximum stress and maximum displacement among different fixation methods, different stress modes, and different fracture types
Normal standing A | Slow walking B | Fast walking C | Stair descent D | |||||||||
a | b | c | a | b | c | a | b | c | a | b | c | |
Maximum stress at the main nail (MPa) | ||||||||||||
1 | 176 | 92 | 239 | 334 | 183 | 456 | 404 | 235 | 556 | 473 | 288 | 653 |
2 | 203 | 102 | 229 | 402 | 204 | 445 | 496 | 256 | 546 | 588 | 307 | 641 |
3 | 121 | 84.8 | 141 | 318 | 173 | 392 | 383 | 219 | 438 | 425 | 265 | 515 |
4 | 89 | 213 | 178 | 416 | 228 | 515 | 278 | 608 | ||||
5 | 67 | 107 | 134 | 205 | 167 | 253 | 203 | 309 | ||||
Maximum displacement of proximal femur (mm) | ||||||||||||
1 | 1.22 | 0.85 | 1.35 | 2.39 | 1.70 | 2.61 | 2.95 | 2.12 | 3.23 | 3.51 | 2.55 | 3.84 |
2 | 0.95 | 0.69 | 1.19 | 1.89 | 1.39 | 2.33 | 2.35 | 1.74 | 2.89 | 2.80 | 2.10 | 3.44 |
3 | 0.85 | 0.70 | 0.93 | 1.64 | 1.40 | 1.82 | 2.04 | 1.75 | 2.29 | 2.44 | 2.09 | 2.79 |
4 | 0.84 | 1.31 | 1.66 | 2.52 | 2.08 | 3.12 | 2.49 | 3.72 | ||||
5 | 0.75 | 0.82 | 1.49 | 1.62 | 1.87 | 2.02 | 2.24 | 2.42 |
- Citation: Mu JX, Xiang SY, Ma QY, Gu HL. Selection of internal fixation method for femoral intertrochanteric fractures using a finite element method. World J Clin Cases 2021; 9(22): 6343-6356
- URL: https://www.wjgnet.com/2307-8960/full/v9/i22/6343.htm
- DOI: https://dx.doi.org/10.12998/wjcc.v9.i22.6343