A Triple Arthrodesis is the surgical fusion of the subtalar and talo calcanela joints. It is usually reserved for severe trauma or osteoarthritis.

Curated Resources:
http://www.podiatry-arena.com/podiatry-forum/showthread.php?t=15518 (Podiatry Arena)
http://www.podiatry-arena.com/podiatry-forum/tags/index.php?tag=/triple-arthrodesis/ (Podiatry Arena)
http://www.podiatryabc.com/t-is-for-triple-arthrodesis/ (Podiatry ABC)
http://podiapaedia.org/wiki/surgery/triple-arthrodesis/ (PodiaPaedia)