TABLE 2.
Measurement for Injury Films
| n | Volar Tilt* | Radial Inclination | Ulnar Variance† | Radial Height | Stepoff | |
|---|---|---|---|---|---|---|
| Overall (% [n]) | 137 | 4% (6) | 26% (35) | 24% (33) | 2% (3) | 58% (80) |
| Mean (SD) | −17° (21.8°) | 13° (10.1°) | 4 mm (4.9 mm) | 3 mm (7.5 mm) | ||
| Minimum to maximum | −71° to 58° | −27° to 29° | −23 to 21 mm | −20 to 18 mm | ||
| AO class (% [n]) | ||||||
| 1 | 31 | 0% | 29% (9) | 39% (12) | 0% | 97% (30) |
| 2 | 6 | 17% (1) | 17% (1) | 0% | 0% | 83% (5) |
| 3 | 3 | 33% (1) | 33% (1) | 33% (1) | 0% | 33% (1) |
| 4 | 3 | 0% | 33% (1) | 33% (1) | 0% | 33% (1) |
| 5 | 3 | 0% | 33% (1) | 33% (1) | 0% | 33% (1) |
| 6 | 10 | 0% | 40% (4) | 40% (4) | 10% (1) | 60% (6) |
| 7 | 42 | 5% (2) | 31% (13) | 24% (10) | 0% | 60% (25) |
| 8 | 39 | 5% (2) | 13% (5) | 10% (4) | 5% (2) | 28% (11) |
| Frykman (% [n]) | ||||||
| 1 | 9 | 11% (1) | 22% (2) | 44% (4) | 0% | 89% (8) |
| 2 | 14 | 0% | 29% (4) | 29% (4) | 0% | 93% (13) |
| 3 | 18 | 6% (1) | 39% (7) | 56% (10) | 6% (1) | 56% (10) |
| 4 | 14 | 14% (2) | 50% (7) | 21% (3) | 0% | 36% (5) |
| 5 | 4 | 0% | 25% (1) | 25% (1) | 0% | 100% (4) |
| 6 | 10 | 0% | 20% (2) | 10% (1) | 0% | 100% (10) |
| 7 | 23 | 4% (1) | 26% (6) | 17% (4) | 0% | 44% (10) |
| 8 | 45 | 2% (1) | 13% (6) | 13% (6) | 4% (2) | 44% (20) |
Data represent the percentage of fractures that fall into the normal range for each parameter and for each fracture classification, the mean measurement achieved, and the range of measurements for each parameter.
*
Minus values indicate dorsal tilt.
†
Minus values indicate negative ulnar variance.