Cuboid bone is one of the seven tarsal bones of foot. It is most lateral in the distal row and is present between calcaneus proximally and fourth and fifth metatarsal bones distally.
Structure of Cuboid:
Cuboid consists of the following surfaces.
- Dorsolateral surface: This surface is rough and provide attachment for a number of ligaments.
- Plantar Surface: It is crossed distally by the a groove for tendon of peroneus longus. The surface of bone behind the groove is rough, for the attachment of the plantar calcaneocuboid ligament. Proximally this surface is bouded by a ridge ending in the tuberosity of cuboid.
- Lateral Surface: It is characterized by the presence of a deep notch, which is formed by the commencement of the groove for peroneus longus tendon in the plantar surface.
- Medial Surface: This surface is much more extensive than the rest and is partly non articular. It bears an oval facet for lateral cuneiform.
- Distal Surface: It is divided vertically into a medial quadrilateral articular area for the fourth metatarsal base and a lateral triangular area for the base of fifth metatarsal bone.
- Proximal Surface: It is triangular and concavo-convex in form and articulates with the distal calcaneal surface.
Blood supply of cuboid:
Blood supply comes from deep branches of medial and lateral plantar arteries. An additional small dorsal supply coming from dorsal arterial network also exists.
Nerve Supply to cuboid:
The cuboid is innervated by branches from the lateral plantar, sural and deep peroneal nerves.
Ossification of cuboid:
Cuboid may begin to ossify before birth but commonly the center appears at 6 months after birth.