Foot & Ankle

Question 1

Principle of ankle fusion, optimal position:

Answer 1

Neural dorsiflexion
5 to 10 degrees external rotation
5 degree hindfoot valgus
5mm of posterior talar translation

Question 2

Ankle fusion, methods:

Answer 2

Arthroscopic assisted or open arthrodesis

Implants:
Screws, plate & screws, external fixation

TCC (tibiotalocalcaneal) fusion
- load sharing device
Adv: improved bending stiffness & rotational stability compared to plate and screw construct