Table 2 Summary of the lumbar spine model components, including the number of volumetric elements, surface elements, and vertices for cortical and cancellous bones, nucleus, annulus, and cartilage across different regions (L1 to L5).
Component | Region | Volumetric elements | Surface elements | Vertices |
|---|---|---|---|---|
Cortical bone | L1 | 276,374 | 44,988 | 65,517 |
L2 | 282,049 | 45,512 | 66,887 | |
L3 | 294,735 | 48,282 | 70,171 | |
L4 | 256,790 | 42,210 | 61,369 | |
L5 | 275,650 | 45,962 | 65,963 | |
Cancellous bone | L1 | 76,122 | 11,270 | 15,760 |
L2 | 79,964 | 11,020 | 16,331 | |
L3 | 90,909 | 12,146 | 18,462 | |
L4 | 83,500 | 10,386 | 16,745 | |
L5 | 83,338 | 11,630 | 17,046 | |
Nucleus | D1(L1/L2) | 4170 | 936 | 956 |
D2(L2/L3) | 4300 | 960 | 983 | |
D3(L3/L4) | 4218 | 986 | 978 | |
D4(L4/L5) | 5829 | 1136 | 1285 | |
Annulus | D1(L1/L2) | 4111 | 1494 | 1114 |
D2(L2/L3) | 4396 | 1612 | 1197 | |
D3(L3/L4) | 4160 | 1606 | 1159 | |
D4(L4/L5) | 5550 | 1842 | 1448 | |
Cartilage | L1D1 | 15,765 | 31,530 | 2731 |
L2D1 | 19,067 | 38,134 | 3351 | |
L2D2 | 17,130 | 34,260 | 3083 | |
L3D2 | 18,144 | 36,288 | 3299 | |
L3D3 | 21,001 | 42,002 | 3678 | |
L4D3 | 19,062 | 38,124 | 3394 | |
L4D4 | 18,280 | 36,560 | 3215 | |
L5D4 | 18,261 | 36,522 | 3158 | |
Total | 1,982,875 | 587,398 | 449,280 |
