The complete Chopart joint capsule encloses both the talonavicular and calcaneocuboid articulations, the two joints forming the Chopart (midtarsal or transverse tarsal) joint line. The capsules are separate but function as a coordinated unit.
| Location | Midfoot, along the transverse tarsal (Chopart) joint line |
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Encloses the two joints of the transverse tarsal joint line, which together allow the forefoot to twist on the hindfoot to adapt to uneven ground.
Chopart joint arthritis produces midfoot pain over both the TN and CC joints. Isolated TN fusion effectively treats combined Chopart arthritis by eliminating the driving articulation. Complete Chopart arthrodesis (TN + CC fusion) is reserved for rigid deformity or failed isolated TN fusion.
Combined talonavicular and calcaneocuboid arthritis managed by isolated TN fusion (which effectively arthrodeses the Chopart complex by eliminating the dominant joint motion) or complete Chopart arthrodesis.
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