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Journal of Hand Surgery (British and European Volume)
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*Dislocations
*Fractures
*Wrist Injuries and Disorders
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Articles

Chip Fractures of the Triquetrum

Mechanism, classification and results

K. HÖCKER
A. MENSCHIK

From the Traumatological Hospital Meidling, Vienna, Austria

Correspondence: Dr Karl Höcker, Unfallkrankenhaus Wien/Meidling Kundratstraße 37,1120 Vienna, Austria.

Of 231 patients with fractures of the triquetrum, 65 were followed up after a mean period of 46.8 months. The fractures were classified and radiological and clinical follow-up was carried out. Pathomechanical aspects of the origin of the fracture were also considered. It appears that the chisel action of the dorso-proximal edge of the hamate striking against the fully extended and ulnar-deviated wrist is the major cause of the dorsal chip fracture of the triquetrum. Conservative therapy involving immobilization of the injured wrist for 3 weeks proved to be successful. If the bone fragment healed, it took 6 to 8 weeks. There was no indication for surgical intervention. We found no signs of post-traumatic instability of the joint. There was good vascularization of the bone, which excluded the possibility of avascular necrosis. All fractures involving the main body of the triquetrum united.

Journal of Hand Surgery (British and European Volume), Vol. 19, No. 5, 584-588 (1994)
DOI: 10.1016/0266-7681(94)90120-1
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