Table 2.
Results (mean and range) relative to bone mineral density and mechanical testing
| Nail | Plate | Screws | Bone stabilization system | P | |
|---|---|---|---|---|---|
| n | 6 | 6 | 6 | 6 | |
| Bone mineral density (g/cm2) |
0.64 (0.49–0.77) |
0.56 (0.38–0.78) |
0.58 (0.41–0.78) |
0.64 (0.49–0.83) |
0.61 |
| Range of motion during 125 N loading (mm) |
1.7 (1.1–2.4) |
2.2 (1.2–3.3) |
6.0 (3.4–14.1) |
9.0 (5.2–11.5) |
< 0.01* |
| Range of motion during 250 N loading (mm) |
4.4 (2.0–6.1) |
7.5 (2.8–12.0) |
12.1 (8.3–15.8) |
14.6** (13.1–16.0) |
< 0.01*** |
| Number of failed specimens during loading at 125 N | 1 | 0 | 1 | 2 | |
| Number of failed specimens during loading at 250 N | 0 | 3 | 1 | 4 | |
| Number of specimens without failure | 5 | 3 | 4 | 0 | |
| Cycle of failure |
4191 (146–5000) |
3553 (1674–5000) |
3725 (501–5000) |
2132 (520–4501) |
0.10 |
*P < .01 for: nail versus bone stabilization system, plate versus bone stabilization system
**The bone stabilization system group was not included in the statistical analysis. Due to prior failure, there were results from only two specimens for 250 N loading
***P < .01 for: nail versus screws