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Wrist motion analysis in scaphoid nonunion.

S Gehrmann1, T Roeger2, R Kaufmann3

  • 1Department of Trauma and Hand Surgery, University Clinic Düsseldorf, Düsseldorf, Germany. sebastian.gehrmann@med.uni-duesseldorf.de.

European Journal of Trauma and Emergency Surgery : Official Publication of the European Trauma Society
|January 29, 2016
PubMed
Summary
This summary is machine-generated.

Scaphoid nonunion significantly impairs wrist flexion-extension and overall mobility, even without pain. This study developed a new method to measure these wrist motion deficits, showing conventional goniometers are insufficient.

Keywords:
FractureMotion analysisScaphoid nonunionWrist motion

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Area of Science:

  • Orthopedics
  • Biomechanics
  • Medical Engineering

Background:

  • Human wrist motion is complex and multidirectional.
  • Scaphoid nonunion can lead to wrist motion impairment.
  • Accurate measurement of wrist motion deficits is crucial for patient management.

Purpose of the Study:

  • To develop a reliable and practical method for measuring wrist motion impairment in patients with scaphoid nonunion.
  • To quantify the impact of scaphoid nonunion on wrist range of motion.
  • To compare motion deficits between the impaired and unimpaired wrists.

Main Methods:

  • Nine patients with unilateral scaphoid nonunion underwent maximal wrist movement measurements using an electrogoniometer.
  • Circumduction envelope area, flexion-extension (FE) and radio-ulnar deviation (RUD) ranges, and dart-throw-in-motion axis were calculated.
  • Data were processed using a custom MatLab program and analyzed with a student's t test.

Main Results:

  • Scaphoid nonunion significantly reduced flexion/extension range of motion.
  • Overall wrist mobility, measured by circumduction envelope area, was significantly decreased.
  • The circumduction envelope exhibited a kidney-shaped configuration with an oblique axis.

Conclusions:

  • Scaphoid nonunion, even without pain, results in measurable wrist motion deficits.
  • Conventional manual goniometers may inadequately quantify these motion impairments.
  • The developed method provides a more comprehensive assessment of wrist mobility after scaphoid nonunion.