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Chopart Joint

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Description

Joints of the foot[1]
Normal anatomy of the midfoot. The midfoot contains osseous, ligamentous, and tendinous structures located between the Chopart and the Lisfranc joints.[2]
Ligaments of Chopart joint. Joint is stabilized dorsally, from medial to lateral, by dorsal talonavicular ligament (TN) and bifurcate ligament with its two components (calcaneonavicular and calcaneocuboid), dorsolaterally by dorsal calcaneocuboid (DCC) ligament (two-band variant is shown), and plantarly by short and long plantar ligaments. Spring ligament complex (not shown) stabilizes joint medioplantarly.[3]
Chopart joint articulations were analyzed with respect to the talus and the calcaneus. The talar head was divided into 6 regions and the calcaneocuboid facet was divided into 4 regions using the principle axes of the joint surface (Left). The Chopart joint occurs between the red (talus and calcaneus) and blue (navicular and cuboid) bones (Right).[4]

Alternative Names

  • Chopart Joint
  • Midtarsal joint
  • Transverse tarsal joint

General

  • Connects the hindfoot to the midfoot, crossing in an S-shaped direction
  • Named after French surgeon François Chopart (1743-1795), who performed amputations through this joint in cases of necrosis of the forefoot[5]

Anatomy

  • Composed of the condyloid talonavicular joint and the saddle-shaped calcaneocuboid joint
  • These two joints invert and evert with the subtalar joint

Talonavicular Joint

  • Also termed Talocalcaneonavicular Joint
  • Stabilized in part by the acetabulum pedis, a deep socket that contains the head of the talus.
  • Composed of the
  • More mobile of the two joints

Calcaneocuboid Joint

  • Concave vertically and convex transversely
  • Composed of
    • Articular surface of cuboid on calcaneus
    • Proximal/posterior articular surface of the cuboid
  • This highly congruent joint “locks in” during step-off

Ligaments

Actions

  • The Chopart complex has a high degree of mobility
  • Weight bearing
    • Navicular and cuboid are fixed, immobile
    • Permits the talus and calcaneus to move relative to them
  • Joint facilitates both inversion and eversion
  • Allows the hindfoot to pivot while the forefoot remains stationary on the ground
  • Functions as a unit to invert and evert the foot
  • Stabilizes the midfoot during the pushoff phase of gait

Vascular Supply

  • Lateral tarsal artery

Innervation

Clinical Significance

See Also

References

  1. ↑ Case courtesy of Andrew Murphy, Radiopaedia.org, rID: 99469
  2. ↑ Tafur, Monica, Zehava Sadka Rosenberg, and Jenny T. Bencardino. "MR imaging of the midfoot including Chopart and Lisfranc joint complexes." Magnetic Resonance Imaging Clinics 25.1 (2017): 95-125.
  3. ↑ Hirschmann, Anna, et al. "Acute fracture of the anterior process of calcaneus: does it herald a more advanced injury to Chopart joint?." American Journal of Roentgenology 210.5 (2018): 1123-1130.
  4. ↑ Behrens, Andrew, et al. "Coverage maps demonstrate 3D Chopart joint subluxation in weightbearing CT of progressive collapsing foot deformity." Scientific reports 12.1 (2022): 19367.
  5. ↑ Wolf JH. Francois Chopart (1743-1795)dinventor of the partial foot amputation atthe tarsometatarsal articulation. Orthop Traumatol 12:341–344, 200
Created by:
John Kiel on 25 December 2021 07:25:35
Authors:
Last edited:
6 November 2024 22:42:54
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