Table 1.
Summary characteristics of the 18 test specimens from lab prepared (9 LP, n=9 donors) and postmortem retrieval TKRs (9 PM specimens from n=7 donors, 1 donor had bilateral implants, 2 specimens from one donor).
| Donor Data | Type | Mean | Standard Dev | Min | Max |
|---|---|---|---|---|---|
| Age (years) | LP | 76.7 | 8.7 | 64 | 90 |
| PM | 72.9 | 8.7 | 61 | 87 | |
| Weight (kg) | LP | 90.1 | 18.0 | 65 | 117 |
| PM | 78.3 | 17.7 | 61 | 103 | |
| Time in service (years) | LP | 0 | 0 | 0 | 0 |
| PM | 6.5 | 4.8 | 1 | 16 | |
| Supporting Bone Morphology & Mechanics | |||||
| Supporting bone fraction (BV/TV) | LP | 0.122 | 0.054 | 0.072 | 0.236 |
| PM | 0.115 | 0.042 | 0.065 | 0.173 | |
| Supporting bone strain (με) | LP | −1320 | 545 | −2020 | −520 |
| PM | −2030 | 1570 | −4820 | −90 | |
| Interlock Morphology | |||||
| Initial interdigitation depth, inID (mm) | LP | 2.3 | 0.7 | 1 | 3.2 |
| PM | 1.7 | 1 | 0.3 | 3.0 | |
| Current interdigitation depth, curID (mm) | LP | 2.3 | 0.7 | 1 | 3.2 |
| PM | 1.1 | 1.2 | 0 | 3.0 | |
| Gap thickness (μm) | LP | 14.0 | 4.1 | 7.1 | 21.2 |
| PM | 40.5 | 17.8 | 14.1 | 60.3 | |
| Interlock Mechanics | |||||
| Trabeculae-cement micromotion (μm) | LP | 1.03 | 0.61 | 0.22 | 2.17 |
| PM | 5.67 | 4.71 | 0.1 | 13.1 | |
| Interdigitated trabecular bone strain (με) | LP | −410 | 330 | −1060 | −16 |
| PM | −1380 | 1530 | −4300 | 15 | |
| Interdigitated trabecular bone strain (με) with distance from cement border > 0.25 mm | LP | −270 | 290 | −830 | 52 |
| PM | −66 | 370 | −500 | 550 | |