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Related Experiment Videos

Scaphoid malunion.

P C Amadio1, T H Berquist, D K Smith

  • 1Department of Orthopedics, Mayo Clinic, Rochester, Minn. 55905.

The Journal of Hand Surgery
|July 1, 1989
PubMed
Summary
This summary is machine-generated.

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Scaphoid fracture union alone does not guarantee success. Poor outcomes and arthritis risk increase with abnormal scaphoid alignment, especially the "humpback" deformity.

Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Sports Medicine

Background:

  • Scaphoid fractures are common wrist injuries.
  • Assessing union after scaphoid fracture treatment is crucial.
  • Scaphoid alignment significantly impacts long-term outcomes.

Purpose of the Study:

  • To evaluate the correlation between scaphoid alignment post-union and clinical/radiographic outcomes.
  • To determine if simple union is sufficient for successful scaphoid fracture treatment.

Main Methods:

  • Prospective study of 45 patients with 46 scaphoid fractures.
  • Clinical examination and trispiral tomography performed >6 months post-union.
  • Measurement of lateral intrascaphoid angle to assess scaphoid alignment.

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Main Results:

  • 20 patients had normal alignment (<35° lateral intrascaphoid angle); 83% had satisfactory outcomes, 22% posttraumatic arthritis.
  • Increased angulation (>36°) led to progressively poorer results.
  • >45° angulation resulted in 27% satisfactory outcomes and 54% posttraumatic arthritis.

Conclusions:

  • Scaphoid union is insufficient to predict successful treatment outcomes.
  • Abnormal scaphoid alignment, particularly "humpback" deformity, is associated with poor clinical and radiographic results.
  • Radiographic assessment of scaphoid alignment is essential for evaluating scaphoid fracture treatment success.