<prompt> The stability of the ankle joint is maintained by all of the following, except -Plantar calcaneonavicular spring ligamentDeltoid ligamentLateral ligamentShape of the superior talar articular surface  <response>: Calcaneonavicular ligament or spring ligament is a powerful ligament attahced posteriorly to the calcaneum and anteriorly to the navicular bone. So it is obvious that it will not participate in the formation of ankle joint. 