Table 1.
Pos = motion bin. d = the mean distance between HAM location and PvP for each motion bin. std = the standard deviation of d. n = number of positions in each motion bin. Average ROM = average total capitate rotation for each HAM. Direction with respect to PvP = relative position of the average helical axis to the average PvP. F = flexion, E = extension, U = ulnar deviation, R = radial deviation, +D = positive dart thrower path, −D = negative dart thrower path, +AD = positive anti dart thrower path, −AD = negative antidart thrower path.
| Distance of HAM axis to PvP | |||||
|---|---|---|---|---|---|
| Pos | d (mm)a | std (mm) | n | Average ROM (std) | Direction with respect to PvP |
| F | 3.6 | 3.0 | 25 | 25 deg (19 deg) | Volar distal |
| E | 3.4 | 3.0 | 63 | 36 deg (18 deg) | Proximal |
| U | 4.5 | 2.0 | 23 | 26 deg (15 deg) | Distal |
| R | 3.0 | 1.6 | 10 | 17 deg (12 deg) | Distal radial |
| +D | 4.2 | 2.2 | 32 | 31 deg (14 deg) | Distal volar |
| −D | 3.4 | 1.7 | 33 | 36 deg (16 deg) | Distal volar |
| +AD | 4.1 | 2.3 | 31 | 36 deg (29 deg) | Volar |
| −AD | 1.8 | 1.1 | 159 | 43 deg (19 deg) | Dorsal |
a
All distances of HAM location to the PvP were statistically different from a hypothetical mean of 0.5 mm.