| Autor: |
Kaneshiro SA; Department of Orthopaedic Surgery, Henry Ford Hospital, Detroit, MI, USA., Failla JM, Tashman S |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of hand surgery [J Hand Surg Am] 1999 Sep; Vol. 24 (5), pp. 984-91. |
| DOI: |
10.1053/jhsu.1999.0984 |
| Abstrakt: |
Three-dimensional motion between the fragments of an experimental scaphoid waist fracture was measured during dynamic forearm pronation and supination in a short-arm thumb spica cast with and without applied tendon loads. Metal markers placed in each fragment were tracked using high-speed biplane radiographic image sequences and stereophotogrammetric analysis. Peak displacements (from the intact state) exceeded 1 mm in all specimens, with the largest movements occurring in the radial direction during pronation (mean: 2.1 mm unloaded, 2.5 mm loaded). Total range of displacement motion between fragments exceeded 3 mm (mean ulnar/radial direction: 3.4 mm unloaded, 4.1 mm loaded). Dorsal/palmar and proximal/distal displacements were minimal except at the extremes of forearm pronation/supination. Rotations between fragments were small (within +/- 6 degrees) and varied considerably across specimens. No significant differences were found between loaded and unloaded trials. Thus, in the absence of long-arm thumb spica casting to limit forearm rotation, significant motion between the fragments of a scaphoid waist fracture is likely. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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