From: Compression-rate-dependent nonlinear mechanics of normal and impaired porcine knee joints
Tests | Intact | Dehydration | Meniscectomy | ||||||
---|---|---|---|---|---|---|---|---|---|
Purpose of Tests | (1) Pilot study | (2) Rate dependence | (3) Altered test sequence | (4) Static response | (5) Fluid pressure support | (6) Load support of menisci | |||
Applied peak force/displacement | 800 μm | 1200 μm | 1200 μm | 1200 μm | 1200 μm | 800 μm | 500 N | ||
Rates in loading phase | 10, 50, 100, 500, 1000, 2000 μm/s | 10, 100, 1000, 2000, 5000 μm/s | 10, 100, 1000, 2000 μm/s | 10, 100, 1000, 2000 μm/s | < 10 μm/s | 10, 100, 1000, 2000 μm/s | 10, 100, 1000 μm/s | 10, 100, 1000 μm/s | 25 N/s |
Minutes for relaxation/creep phase | 20 | 0 (no relaxation) | 35 (3 joints); 0 (2 joints) | 0 | 30–45 | 0 | 30–60 | 30–60 (3 joints); 0 (3 joints) | 30–60 |
Joint angle | ~40° | ~40° | ~40° | ~40° | ~40° | ~40° | ~40° | 30° | 30° |
Number of joints | 11 | 2 | 5 | 5 | 7 | 3 | 2 | 6 | 4 |