["Calcaneogenesis" with secondary Achilles tendon-bone allograft for repair of the loss of hindfoot function : A 12-year case report].

"Calcaneogenesis" with preservation of the ankle joint is possible and innovative. Despite 3.5 years of disconnection of the triceps surae muscle, an Achilles tendon-bone block allograft could restore 88% of the push-off force even attached to a neo-calcaneus that is 1/3 smaller than normal, which is also new.