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Pseudofracture: An Acute Peripheral Tissue Trauma Model
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Scaphoid fracture and scaphoid pseudarthrosis.

A Eisenschenk1, M Lautenbach1, U Weber2

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Der Orthopade
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Summary

Early diagnosis and treatment of scaphoid fractures are crucial. Herbert screw fixation shows good results, and MRI can improve fracture prognosis assessment.

Keywords:
Key words Scaphoid fracture • Scaphoid nonunion •Herbert screw • Magnetic resonance imaging

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Sports Medicine

Background:

  • Scaphoid fractures, common in young individuals, have a high non-union rate.
  • Early diagnosis and therapy are essential for optimal outcomes.
  • Conservative and operative treatments are available.

Purpose of the Study:

  • To evaluate the effectiveness of Herbert screw fixation for scaphoid fractures and non-unions.
  • To assess the utility of Magnetic Resonance Imaging (MRI) in predicting treatment outcomes.

Main Methods:

  • Retrospective analysis of 42 scaphoid fracture and 88 non-union patients treated between 1993-1999.
  • Standard X-ray, clinical examination, and pre/post-operative MRI.
  • Herbert screw fixation for fractures; iliac crest graft and Herbert screw fixation for non-unions.
  • Classification using Herbert and Fisher/Filan and Herbert systems.

Main Results:

  • Herbert screw fixation yielded good to excellent results for scaphoid fractures.
  • Lower fusion rates were observed in patients with pre-operative MRI signal reduction in the proximal fragment.
  • MRI demonstrated potential to enhance radiological fracture classification for prognosis.

Conclusions:

  • Herbert screw fixation is effective for achieving bony fusion and good clinical results in scaphoid fractures and non-unions.
  • Pre-operative MRI signal intensity in the proximal fragment may predict fusion rates.
  • MRI can be a valuable adjunct to traditional X-rays for scaphoid fracture prognostication.