sesamoid bones

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Related to sesamoid bones: accessory bones

sesamoid bones

; sesamoids small bones, developed as a centre of ossification within a tendon at the point of maximal force, e.g. overlying a joint or bony prominence; articular aspect of sesamoid is covered with cartilage; sesamoids are prone to the same range of bone pathologies as any skeletal element
  • bipartite sesamoid two-part sesamoid (i.e. pair of sesamoids, where expectation is for one), e.g. in up to 30% of flexor hallucis brevis (FHB) medial sesamoids

  • constant sesamoids sesamoids occurring in majority of population, to reinforce the host tendon, e.g. patella; paired sesamoids embedded within tendons of FHB at plantar aspect of first metatarsophalangeal joint (1 MTPJ); FHB sesamoids also give sagittal-plane stability to 1 MTPJ (forming a groove on plantar aspect of first metatarsal head within which flexor hallucis longus tendon) runs); also contribute to 1 MTPJ joint dorsiplantar depth, increasing 1 MTPJ efficiency at toe off

  • inconstant sesamoids; variable sesamoids sesamoids occurring in a minority of the population, e.g. sesamoids in slips of the tendon of flexor digitorum brevis at MTPJs; os perineum (sesamoid reinforcing peroneus longus tendon at plantar/lateral border of cuboid)

  • quadripartite sesamoid four-section sesamoid

  • tripartite sesamoid three-section sesamoid

References in periodicals archive ?
18) Although much less common than stress fractures, avascular necrosis of the hallux sesamoid bones should be considered in the differential diagnosis of persistent forefoot pain.
Weld said: "We had hoped initially that we would be able to save him, but he fractured sesamoid bones very badly and, having taken veterinary advice, the humane thing to do was to have him put down.
veterinarian who served as spokesman for the American Association of Equine Practitioners, it was a clean fracture of the shin bone and a crack of the smaller sesamoid bones, the former requiring ``urgent'' not ``emergency'' surgery and the latter likely to heal itself.
It's a fetlock injury, a small flake has come off one of the sesamoid bones.
Sesamoiditis: Painful inflammation of the sesamoid bones within the ball of the foot is caused by pressure from high-impact sports such as aerobics, tennis or running.
Peter Webbon, the Jockey Club's chief veterinary officer, said: "He fractured the bottom end of the cannonbone but there were complications because the sesamoid bones were also damaged and there was extensive soft-tissue damage.