A 3D reconstruction of the calcaneum bone, whether for the right, left, or both, provides a detailed visualization of the largest tarsal bone in the foot, commonly known as the heel bone. This model showcases the calcaneus as a robust, roughly quadrangular structure positioned beneath the talus, forming the foundation of the posterior foot. Its posterior prominence, the calcaneal tuberosity, is prominently featured, serving as the primary weight-bearing surface when standing or walking, with its medial and lateral tubercles providing attachment points for the plantar fascia and intrinsic foot muscles. The superior surface reveals the posterior, middle, and anterior facets, which articulate with the talus to form the subtalar joint, enabling critical movements like inversion and eversion of the foot. The sustentaculum tali, a shelf-like projection on the medial side, is visible supporting the talus and providing a groove for the flexor hallucis longus tendon. Anteriorly, the calcaneocuboid joint is depicted, where the calcaneus meets the cuboid, contributing to the foot’s transverse arch. The lateral surface shows the peroneal tubercle, a landmark for peroneal tendon passage, while the medial aspect highlights its concave contour. The reconstruction emphasizes the bone’s thick cortical shell and trabecular interior, reflecting its strength and shock-absorbing capacity. This 3D view illustrates the calcaneum’s pivotal role in weight distribution, locomotion, and ankle stability, offering valuable insights into its anatomy for studying fractures—common in trauma—or conditions like plantar fasciitis, and aiding in orthopedic assessment and surgical planning.

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