The talus and calcaneus meet at three facets, but these are enclosed by two separate capsules: the posterior facet forms the subtalar joint proper, while the middle and anterior facets share a capsule with the talonavicular joint as the talocalcaneonavicular joint. The tarsal canal and sinus tarsi, containing the interosseous and cervical ligaments, separate the two.
| Location | Hindfoot, between the talus and the calcaneus |
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Encloses the joints between the talus and calcaneus, which together allow inversion and eversion of the foot.
Subtalar arthritis (from post-traumatic, rheumatoid, or primary osteoarthritis causes) produces hindfoot pain with uneven terrain walking. Subtalar fusion (arthrodesis) eliminates painful inversion-eversion motion and is the standard surgical treatment for end-stage subtalar arthritis.
End-stage subtalar joint capsule and cartilage degeneration producing constant hindfoot pain on walking, managed by subtalar arthrodesis restoring pain-free ambulation at the expense of hindfoot motion.
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