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Related Experiment Videos

Positional dislocation of the pisiform.

M Ishizuki1, T Nakagawa, S Itoh

  • 1Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Japan.

The Journal of Hand Surgery
|May 1, 1991
PubMed
Summary
This summary is machine-generated.

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Recurrent pisiform dislocation in a young man with joint laxity was successfully treated by surgical resection of the pisiform bone. This procedure restored full wrist function and eliminated pain, offering a definitive solution for this rare condition.

Area of Science:

  • Orthopedic surgery
  • Wrist biomechanics
  • Traumatology

Background:

  • Recurrent positional dislocation of the pisiform bone is a rare condition.
  • Generalized joint laxity can predispose individuals to such dislocations.
  • Traumatic events, like motorcycle accidents, can precipitate wrist injuries.

Observation:

  • A 19-year-old male experienced recurrent distal dislocation of the pisiform bone relative to the triquetrum in his right wrist.
  • Dislocation occurred with wrist extension beyond 45 degrees.
  • Spontaneous reduction was observed with wrist flexion exceeding 55 degrees.

Findings:

  • The patient presented with a history of generalized joint laxity.
  • Surgical resection of the pisiform bone was performed.

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  • Post-resection, the patient achieved a pain-free and fully functional wrist.

    • Implications:

    • Pisiform resection is a viable and effective treatment for recurrent pisiform dislocation, particularly in cases associated with generalized joint laxity.
    • This surgical approach can resolve chronic wrist pain and functional deficits.
    • Understanding the biomechanics of wrist extension and flexion is crucial in managing pisiform instability.