Anatomical Relations
The triangular ligaments sit on the dorsal aspect of the digital expansions, distal to the proximal interphalangeal joint (Colzani et al., 2016).
Structure
The triangular ligaments connect the lateral tendinous bands across the middle phalanx (Colzani et al., 2016).
Function
The ligament prevents separation and anterior displacement of the lateral bands during flexion of the proximal interphalangeal joint.
List of Clinical Correlates
—Boutonniere deformity
References
Colzani, G., Tos, P., Battiston, B., Merolla, G., Porcellini, G. and Artiaco, S. (2016) 'Traumatic Extensor Tendon Injuries to the Hand: Clinical Anatomy, Biomechanics, and Surgical Procedure Review', J Hand Microsurg, 8(1), pp. 2-12.
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Joint Ligament
Entheseal structures are widely located throughout the body and are represented by the interface between bone and several tissues including tendon, joint capsules and ligaments.
