Functional hallux rigidus and the Achilles-calcaneus-plantar system

Foot Ankle Clin. 2014 Dec;19(4):669-99. doi: 10.1016/j.fcl.2014.08.006. Epub 2014 Sep 27.


Functional hallux rigidus is a clinical condition in which the mobility of the first metatarsophalangeal joint is normal under non-weight-bearing conditions, but its dorsiflexion is blocked when first metatarsal is made to support weight. In mechanical terms, functional hallux rigidus implies a pattern of interfacial contact through rolling, whereas in a normal joint contact by gliding is established. Patients with functional hallux rigidus should only be operated on if the pain or disability makes it necessary. Gastrocnemius release is a beneficial procedure in most patients.

Keywords: Achilles-calcaneus-plantar system; Functional hallux rigidus; Metatarsophalangeal joint.

Publication types

  • Review

MeSH terms

  • Achilles Tendon / physiopathology*
  • Equinus Deformity / physiopathology
  • Foot / diagnostic imaging
  • Foot / physiopathology*
  • Gait / physiology*
  • Hallux Rigidus / diagnostic imaging
  • Hallux Rigidus / physiopathology*
  • Humans
  • Metatarsophalangeal Joint / physiopathology
  • Muscle, Skeletal / physiopathology*
  • Radiography
  • Range of Motion, Articular
  • Weight-Bearing