Table 4.
Stiffness Values Measured at Various Displacements for All 3 Test Groups
| Group | Stiffness, N/mm |
|||
|---|---|---|---|---|
| At 2 mm | At 5 mm | At 7 mm | At 10 mm | |
| Native (n = 8) | 7.5 ± 3.0 | 18.2 ± 5.3 | 19.5 ± 4.8 | 14.1 ± 7.1 |
| Semi-T MPFLR (n = 3) | 16.8 ± 4.7 | 7.1 ± 3.6 | 1.9 ± 3.8 | 1.9 ± 2.9 |
| Augmented MPFLr (n = 4) | 12.7 ± 2.3 | 9.3 ± 1.0 | 8.8 ± 1.2 | 8.3 ± 1.2 |
NOTE. The augmented MPFLr provided consistent stiffness at clinically relevant displacements.
MPFLr, medial patellofemoral ligament repair; MPFLR, medial patellofemoral ligament reconstruction; semi-T, semitendinosus.