Ankle/Tib Fib Exam

Mortise

Lateral malleolus

Medial malleolus

Tibial tuberosity

Medial condyle

Lateral condyle

What type of joint is the talofibular and tibiotalar joint?

Hinge

What type of joint is the proximal tibiofibular joint?

Gliding

What type of joint is the distal tibiofibular joint?

Fibrous, syndesmosis

What type of joint is the femorotibial joint?

Modified hinge

Osteogenesis Imperfecta

Inherited disorder of connective tissue causing a defect in the gene that produces type 1 collagen, an important building block of bone.

What is the most common form of osteogenesis imperfecta?

Type 1

What is the most severe form of osteogenesis imperfecta?

Type 2; usually leads to death within the first year of life

Giant Cell Tumors (Osteoclastomas)

Benign tumors of the proximal tibia or distal femur & other areas of bone near joints

Osteomalacia (Rickets)

Softening of bones due to deficiency in Vitamin D

Trimalleolar Fracture

Fracture involving the posterior lip of the tibia in addition to the medial and lateral malleoli

What fracture is this?

Trimalleolar Fracture

Bimalleolar (Pott’s) Fracture

Fracture of both malleoli with dislocation of the ankle joint

What fracture is this?

Bimalleolar (Pott’s) Fracture

What is the technique for AP ankle and AP mortise ankle?

70 kVp @ 1.8 mAs

What is the technique for lateral ankle?

70 kVp @ 1.25 mAs

What joint spaces need to be open for an AP mortise ankle view?

Talofibular and tibiotalar

What is the technique for AP and lateral tib/fib for the table bucky?

81 kVp @ 2.0 mAs

What is the technique for AP and lateral tib/fib using the tabletop receptor?

70 kVp @ 2.5 mAs

Medial oblique ankle view

The distal ends of the tibia and fibula, parts of which are often superimposed over the talus.  The tibiofibular articulation also should be shown.  

Ankle stress views

Usually performed after inversion or eversion injury; Verifies ligamentous tear

AP ankle weight bearing view

Performed to identify ankle joint space narrowing with weight-bearing. In addition shows side-to-side comparison of joint.

Tib/fib oblique special views

45-degree oblique projection of the bones and soft tissues of the leg and one or both of the adjacent joints

Tib/fib medial oblique

Proximal and distal tibiofibular articulations; Maximum interosseous space between the tibia and fibula

Tib/fib lateral oblique

Fibula superimposed by lateral portion of tibia