Table 1 The stresses in bone at the corresponding points in brackets (s. Figure 4 ) at different wedge openings
Fixation | Wedge opening (mm) | maxσz(tensile stress) | minσz(compression stress) | maxσx(tensile stress) | minσx(compression stress) | maxσy(tensile stress) | minσy(compression stress) | Misσ (shear von Mises stress) |
|---|---|---|---|---|---|---|---|---|
First generation Puddu plate | 7.5 | 8.0 (a) | −23.7 (b) | 15.9 (a) | −6.6 (a) | 15.1 (c) | −35.9 (b) | 45.8 (b) |
10.5 | 3.6 (a) | −27.2 (b) | 11.4 (a) | −19.9 (b) | 14.7 (c) | −40.7 (b) | 39.6 (b) | |
12.5 | 4.4 (c) | −28.0 (b) | 11.6 (a) | −22.4 (b) | 12.9 (c) | −40.0 (b) | 40.5 (b) | |
17.5 | 4.8 (c) | −27.1 (b) | 11.9 (a) | −17.9 (b) | 12.4 (c) | −38.5 (b) | 50.9 (b) | |
22.5 | 3.0 (c) | −26.9 (a) | 11.5 (a) | −6.6 (a) | 8.9 (c) | −26.1 (b) | 29.2 (b) | |
Second generation Puddu plate | 7.5 | 3.3 (a) | −25.9 (b) | 10.8 (a) | −15.3 (b) | 6.8 (c) | −34.4 (b) | 23.6 (b) |
10.5 | 3.5 (a) | −27.3 (b) | 10.9 (a) | −18.0 (b) | 8.5 (c) | −32.2 (b) | 38.4 (b) | |
12.5 | 3.4 (a) | −29.1 (b) | 10.9 (a) | −19.2 (b) | 7.0 (c) | −33.9 (b) | 39.5 (b) | |
17.5 | 3.3 (a) | −29.9 (b) | 11.4 (a) | −18.5 (b) | 8.1 (c) | −31.2 (b) | 40.5 (b) | |
22.5 | 2.6 (c) | −26.1 (a) | 10.9 (a) | −6.4 (a) | 5.8 (c) | −25.4 (b) | 29.9 (b) | |
TomoFix plate with bone graft | 7.5 | 7.1 (c) | −23.6 (a) | 12.4 (a) | −6.4 (d) | 6.2 (c) | −10.6 (d) | 25.4 (a) |
10.5 | 12.9 (c) | −29.9 (a) | 8.88 (a) | −5.9 (d) | 5.4 (c) | −10.4 (d) | 32.0 (a) | |
12.5 | 6.7 (c) | −29.9 (a) | 9.16 (a) | −5.8 (d) | 4.4 (c) | −10.4 (d) | 32.7 (a) | |
17.5 | 7.7 (c) | −20.5 (a) | 9.68 (a) | −6.3 (d) | 5.4 (c) | −11.1 (d) | 23.0 (a) | |
22.5 | 5.6 (d) | −23.8 (a) | 11.0 (a) | −6.1 (d) | 4.7 (c) | −11.6 (d) | 27.2 (a) | |
TomoFix plate without bone graft | 7.5 | 21.1 (a) | −25.8 (a) | 13.2 (a) | −7.2 (d) | 8.6 (c) | −12.9 (d) | 25.8 (a) |
10.5 | 7.8 (c) | −33.2 (a) | 13.8 (a) | −7.6 (d) | 4.8 (c) | −13.4 (d) | 31.3 (a) | |
12.5 | 6.7 (c) | −32.7 (a) | 13.9 (a) | −7.3 (d) | 7.0 (c) | −13.2 (d) | 31.5 (a) | |
17.5 | 6.1 (c) | −31.4 (a) | 11.4 (a) | −6.5 (d) | 7.5 (c) | −14.1 (d) | 31.7 (a) | |
22.5 | 14.8 (a) | −24.1 (a) | 13.4 (a) | −7.4 (c) | 5.7 (c) | −14.9 (d) | 25.7 (a) |