Scaphoid kinematics before and after scaphotrapeziotrapezoidal ligament section. Assessment by radiostereometric analysis and computed tomography in a cadaver study.
The purpose of this study was to measure changes in scaphoid kinematics after division of scaphotrapeziotrapezoidal ligaments, with the intention of determining a clinical measure that could be detected by computed tomography. Twelve freshly frozen cadaver upper extremities were marked with tantalum beads and fixed in positions of neutral, 30° extension, and 40° ulnar deviation. Stereoradiographs for bone migration analysis by radiostereometric analysis and computed tomography scans for visible assessment were obtained before and after scaphotrapeziotrapezoidal ligament section. After ligament resection there was a scaphoid supination of 5° and a small (less than 1 mm) radial, distal, and dorsal translation of the distal pole in 30° of wrist extension. In computed tomography reconstructions, the ligament section appeared as a 1 to 2 mm gap in the scaphotrapeziotrapezoidal corner, with loss of articulation between the distal scaphoid pole and the trapezoid bone and increased scaphoid flexion.
Stilling
M
M
Orthopaedic Research Unit, Aarhus University Hospital, Aarhus, Denmark. maiken.stilling@ki.au.dk
Krøner
K
K
Rømer
L
L
Van De Giessen
M
M
Munk
B
B
D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008023:Ligaments, Articular / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular / Q000502:physiology*; D021361:Scaphoid Bone / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D012984:Software; D036542:Tomography, Spiral Computed; D051222:Trapezium Bone / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D051223:Trapezoid Bone / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*