TABLE II.
Mechanical parameters throughout postnatal development
| Age (Days) | Location | Initial Area (mm2) | Toe Modulus (MPa) | Linear Modulus (MPa) | Transition Strain (mm/mm) | Transition Stress (MPa) |
|---|---|---|---|---|---|---|
| 4 | Insertion | 0. 016±0. 01 | 43. 7±28. 6a | 74. 1±50. 8a | 0. 064±0. 04a | 3. 38±1. 81 |
| 10 | Insertion | 0. 030±0. 01ab | 74. 0±77. 6 | 198. 5±153. 9ab | 0. 036±0. 26b | 3. 48±2. 82 |
| 28
|
Insertion | 0. 075±0. 04ac | 60. 8±46. 3a | 157±94. 6a | 0. 024±0. 02c | 2. 18±1. 30c |
| 4 | Midsub | 0. 012±0. 01 | 91. 6±74. 9 | 209. 7±174. 2 | 0. 03±0. 02 | 4. 84±3. 09 |
| 10 | Midsub | 0. 027±0. 01b | 75. 8±68. 7 | 357. 5±292. 9b | 0. 025±0. 02 | 3. 46±2. 66 |
| 28 | Midsub | 0. 049±0. 02c | 170. 0±159. 2c | 258. 3±147. 3 | 0. 013±0. 01c | 3. 35±2. 50 |
Data represented as mean ± st dev.
a
Significant comparisons between midsubstance (abbreviated “midsub”) and insertion site location;
b
Significantly different between 4 and 10 days.
c
Significantly different between 10 and 28 days. Significance set at p<0. 025.