Editing Tibia (section)

===Lower extremity===
[[File:Tibia - inferior epiphysis (anterior view).jpg|thumb|Lower extremity of right tibia seen from the front]]
[[File:Tibia - inferior epiphysis (posterior view).jpg|thumb|Lower extremity of right tibia seen from the back]]
The distal end of the tibia is much smaller than the proximal end and presents five surfaces; it is prolonged downward on its medial side as a strong pyramidal process, the [[Malleolus#Medial malleolus|medial malleolus]]. The lower extremity of the tibia together with the fibula and [[talus bone|talus]] forms the [[Ankle|ankle joint]].

====  Surfaces ====
The '''inferior articular surface''' is quadrilateral, and smooth for articulation with the talus. It is concave from before backward, broader in front than behind, and traversed from before backward by a slight elevation, separating two depressions. It is continuous with that on the medial malleolus.

The '''anterior surface''' of the lower extremity is smooth and rounded above, and covered by the tendons of the Extensor muscles; its lower margin presents a rough transverse depression for the attachment of the articular capsule of the ankle-joint.

The '''posterior surface''' is traversed by a shallow groove directed obliquely downward and medialward, continuous with a similar groove on the posterior surface of the talus and serving for the passage of the tendon of the [[Flexor hallucis longus]].

The '''lateral surface''' presents a triangular rough depression for the attachment of the inferior interosseous ligament connecting it with the fibula; the lower part of this depression is smooth, covered with cartilage in the fresh state, and articulates with the fibula. The surface is bounded by two prominent borders (the [[Anterior colliculus|anterior]] and posterior colliculi), continuous above with the [[interosseous crest]]; they afford attachment to the anterior and posterior ligaments of the lateral malleolus.

The '''medial surface''' – see [[medial malleolus]] for details.

====Fractures====
[[Ankle fracture]]s of the tibia have several classification systems based on location or mechanism:

*[[Medial malleolus]] – [[Herscovici classification]]
*[[Posterior malleolus]] – [[Haruguchi classification]]
*Mechanism – [[Lauge-Hansen classification]]