berkeman said:
What part of that article?
This part, to be exact.
"Static study
When subjected to rupture (
Fig. 6), the median failure load was 1.844 N, and the mean failure time was 72 s (
Table 1). When comparing the two cemented screw configurations, specimens with screws cemented in rows B and D presented a higher ultimate load (2.218 N vs. 2.105,
p = 0.901) and higher stiffness (125 N/mm vs. 106 N/mm,
p = 0.672). Specimens with cemented screws in rows A and E tolerated 6 mm more deformity before failure (
p = .447) and the time to failure was longer (84 s vs. 56 s,
p = .342); however, neither of these differences was statistically significant (
Table 2).
Table 1. Median of values obtained in the study at breakage.
| Variable | Median (ranges) |
|---|
| Breaking load (N) | 1844 (804–4135.5) |
|---|
| Elastic load (N) | 1236 (611.9–3917.6) |
|---|
| Maximum deformity (mm) | 25 (8.7–50.6) |
|---|
| Stiffness (N/mm) | 93 (32.2–233.4) |
|---|
| Energy (J) | 39 (7.1–92.7) |
|---|
| Breakage time (s) | 72 (22.5–166.9) |
|---|
All specimens failed in the
diaphysis by a fracture line that included at least one of the holes used for
plate fixation.
A comparative analysis was performed between those specimens with an age older than 76 years (
n = 6) and those younger than 76 years (
n = 4) and it was observed that those specimens younger than 76 years tolerated greater deformity before failure (30.7 mm vs. 22.4 mm,
p = .61), higher ultimate load (2411 N vs. 1995 N,
p = .476) and absorbed greater energy (59 J vs. 30 J,
p = .171), without these differences being statistically significant. Significant differences were only observed in stiffness and breakage time"
*For this purpose, an increasing compressive load was applied at a rate of 20 mm/min until failure, defined as dissociation between the bone and the implant, the appearance of a fracture line or implant breakage.
