The<unk>  joint is consisted of 2 different joints:
1: The true<unk>  joint (Responsible for the dorsiflexion and plantar flexion movements of the<unk>  joint): It is consisted of three bone:
a: The tibia (medial<unk> 
b: The fibula (lateral<unk> 
c: The talus (the floor upon which the tibia and fibula rest).
2: The subtalar joint (Responsible for the invertion and evertion of foot):
a: The talus
b: The calcaneus
A combination of<unk>  bones, joint capsule, and ligaments system are responsible for the stability of the<unk>  joint.
syndesmosis of this stabilizing system are
Anterior tibiofibular ligament
Posterior tibiofibular ligament
Transverse tibiofibular ligament
Interosseous membrane
Generally, there are three sub-groups for the the<unk>  joint based on the location of the the tibia and fibula:
Medial malleolus - inside part of the tibia
Posterior malleolus - back part of the tibia
Lateral malleolus - end of the fibula
Accordingly, there are thee type of<unk>  invovlement:
A unimalleolar fracture
Involves either the distal fibula (more common) or the distal tibia
A bimalleolar fracture
Involves the lateral malleolus and the medial malleolus.
A trimalleolar fracture
Involves the lateral malleolus, the medial malleolus, and the distal posterior aspect of the tibia.
Ankle fracture
Humerus fracture
Femur fracture
Ulnar fracture
Calcaneal fracture
Bunion
Rolando fracture
Tibial plateau fracture