Capitohamate ligament

Last revised by Jeremy Jones on 28 Jul 2023

The capitohamate ligament is one of the three distal interosseous ligaments of the wrist 1,2. It acts along with capitotrapezoid and trapeziotrapezoid ligaments to stabilize the distal row of carpals and keep them moving as a single unit 1,2.

Each of the distal interosseous ligaments has volar, dorsal, and interosseous parts 2. The dorsal and volar parts of the of the capitohamate ligament cover only the distal half of the joint, with the deep part of the ligament located in a square-shaped depression in the anterior and distal margin of the capitohamate joint 3. The deep part is a relatively large ligament with distal extension to the 3rd and 4th metacarpal bases 3.

The capitohamate ligament may be seen running between its attachments on the distal capitate and distal hamate and may be best viewed on axial and coronal planes with either normal orientation or radial deviation of the wrist 4. It may also be more easily visualized with MR arthrography 4.

The distal row ligaments are generally stronger than the ligaments in the proximal row and are rarely torn 1,2, with the capitohamate being the strongest of the three 2.

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