We need you! See something you could improve? Make an edit and help improve WikSM for everyone.

Scapholunate Ligament

From WikiSM
Jump to: navigation, search


3D rendering of the SLL with the scaphoid removed to show the ligaments: dorsal (blue), proximal (yellow), volar (green) components[1]
The scapholunate ligament is C-shaped. Its dorsal (D) component is the strongest (P, proximal; V, volar)[2]


  • Scapholunate ligament Complex
  • Scapholunate Ligament (SLL)
  • Scapholunate Lnterosseous Ligament (SLIL)


Dorsal Component

  • Short, transverse collagen fibers
  • Blends with joint capsule, scaphotriquetral and intercarpal ligaments
  • Strongest portion of the complex (3 mm thick, 5 mm long)
  • Controls flexion/extension
  • Complete defect is usually symptomatic

Volar Component

  • Oblique collagen fibers (1 mm thick)
  • Blends with extrinsic volar radioscapholunate ligament
  • Controls rotational motion
  • Major proprioceptive role

Proximal/Intermediate/Interosseous Component

  • Fibrocartilage, sparse neurovascular supply
  • Weakest portion of the complex
  • Extends a few millimeters into the joint, akin to a meniscus
  • Often asymptomatic when torn in isolation
  • Usually tears at the scaphoid attachment

Secondary stabilizers

  • Scapho-trapezial-trapezoidal ligament
  • Radio-scapho-capitiate ligament


Vascular Supply


Clinical Significance

See Also


  1. Image courtesy of radsource.us, "SLL Tear and DISI Deformity"
  2. 2.0 2.1 Andersson, Jonny K. "Treatment of scapholunate ligament injury: current concepts." EFORT Open reviews 2.9 (2017): 382-393.
  3. Rajan, Prashant V., and Charles S. Day. "Scapholunate interosseous ligament anatomy and biomechanics." The Journal of hand surgery 40.8 (2015): 1692-1702.
  4. Salva-Coll, Guillem, Marc Garcia-Elias, and Elisabet Hagert. "Scapholunate instability: proprioception and neuromuscular control." Journal of wrist surgery 2.02 (2013): 136-140.
Created by:
John Kiel on 21 December 2023 20:39:33
Last edited:
27 December 2023 22:14:03