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Mechanical strain at the pisotriquetral joint
1Department of Anatomy, University of Cologne, Germany. albert.beckers@uni-koeln.de
Clinical Anatomy (New York, N.Y.)
|September 2, 1998
Summary
The pisiform bone is crucial for wrist stability and force transmission. Its removal may cause wrist malfunction, suggesting surgical excision should be reconsidered.
Area of Science:
- Orthopedic surgery
- Biomechanics
- Anatomy
Background:
- Wrist pain involving the pisiform bone is common, often linked to tendinitis, fractures, or pisotriquetral joint osteoarthritis.
- Surgical excision of the pisiform is a standard treatment for chronic pain, but potential functional deficits post-excision are not well understood.
Purpose of the Study:
- To investigate the biomechanical role of the pisiform bone and pisotriquetral joint in carpal force transmission.
- To evaluate the impact of pisiform excision on wrist function and stability.
Main Methods:
- Qualitative, quantitative, and densitometrical analysis of 112 pisotriquetral joints.
- Mechanical testing to assess force distribution within the pisiform and pisotriquetral joint.
Main Results:
- The pisiform bone significantly contributes to the stability of the wrist's ulnar column.
- It functions to stabilize the triquetrum, preventing subluxation, and acts as a fulcrum for force transfer from the forearm to the hand.
Conclusions:
- The pisiform bone plays a vital role in wrist biomechanics and stability.
- Pisiform excision may lead to functional impairment, warranting a reevaluation of this surgical approach.