Table 2.
Summary of strain at 30 N, ultimate tensile stress, and Young’s modulus (average ± standard deviation) of PADM firm over time (confirmatory study).
| Day | Average ultimate tensile stress load (N/cm) | Average ultimate tensile stress (MPa) | Strain at 30 N | Average Young’s modulus (MPa) |
|---|---|---|---|---|
| 0 | 255 ± 21 | 17.6 ± 4.5 | 0.10 ± 0.02 | 71.3 ± 6.2 |
| 7 | 346 ±18 | 22.1 ± 1.1 | 0.13 ± 0.02 | 86.7 ± 9.6 |
| 14 | 216 ± 42 | 14.3 ± 2.5 | 0.16 ± 0.03 | 58.6 ± 8.2 |
| 21 | 197 ± 29 | 13.7 ± 1.7 | 0.18 ± 0.02 | 61.0 ± 5.9 |
| 28 | 119 ± 26 | 7.9 ± 1.7 | 0.22 ± 0.09 | 36.4 ± 8.0 |
| 35 | 158 ± 31 | 10.2 ±1.7 | 0.16 ± 0.04 | 50.3 ± 6.6 |
| 42 | 194 ± 25 | 11.7 ± 1.7 | 0.14 ± 0.02 | 53.0 ± 8.1 |
PADM: porcine-derived acellular dermal matrix.
On average, there was an initial decrease up until day 28 of implantation followed by a significant increase between days 28 and 42 in both ultimate tensile stress and Young’s modulus.