Table II.
Mean measures for similarity of stress distribution (%), percentage of interface area underloaded compared to the native case (%), maximum stress (MPa) in medial unicompartmental knee arthroplasty, and the total load measured at the medial bone-implant interface (N). M0 refers to the conventional implant; M1 to M4 refers to the additively manufactured implants as given in Table I.
| Test variant | Mean Jaccard similarity, % (SD) | Mean area underloaded, % (SD) | Mean maximum stress, MPa (SD) | Mean total load measured, N (SD) |
|---|---|---|---|---|
| Native | N/A | N/A | 2.0 (0.7) | 422.9 (1.1) |
| M0 | 19.8 (0.6) | 71.1 (1.2) | 0.2 (0.0) | 386.8 (1.3) |
| M1 | 76.9 (1.8) | 1.2 (1.0) | 1.7 (0.6) | 362.6 (1.8) |
| M2 | 74.3 (1.1) | 3.6 (2.1) | 1.7 (0.8) | 374.4 (2.2) |
| M3 | 71.2 (2.3) | 5.0 (1.7) | 2.4 (0.9) | 423.5 (2.6) |
| M4 | 75.4 (3.0) | 2.7 (2.2) | 1.8 (0.8) | 420.0 (2.3) |
N/A, not applicable; SD, standard deviation.