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An accessory navicular bone is an accessory bone of the foot that occasionally develops abnormally in front of the ankle towards the inside of the foot. This bone may be present in approximately 2-21% of the general population and is usually asymptomatic. [1] [2] [3] When it is symptomatic, surgery may be necessary.
Talocalcaneonavicular articulations exposed from above by removing the talus. Mueller–Weiss syndrome had been traditionally considered a spontaneous osteonecrosis of the navicular bone, but there is no certain pathogenetic explanation. Pathologic evidence of osteonecrosis (empty lacunae) [12] is seen in only a minority of pathological specimens.
This bone may be present in approximately 2–21% of the general population and is usually asymptomatic. [18] [19] [20] When it is symptomatic, surgery may be necessary. The Geist classification divides the accessory navicular bones into three types. [20] Type 1: An os tibiale externum is a 2–3 mm sesamoid bone in the distal posterior ...
Avascular necrosis (AVN), also called osteonecrosis or bone infarction, is death of bone tissue due to interruption of the blood supply. [1] Early on, there may be no symptoms. [ 1 ] Gradually joint pain may develop, which may limit the person's ability to move. [ 1 ]
In some cases of osteochondrosis, such as Sever's disease and Freiberg's infraction, the involved bone may heal in a relatively normal shape and leave the patient asymptomatic. [11] On the contrary, Legg-Calvé-Perthes disease frequently results in a deformed femoral head that leads to arthritis and the need for joint replacement .
These connect the anterior margin of the sustentaculum tali of the calcaneus to the plantar surface of the navicular bone. [1] [2] Its individual components are the: superomedial calcaneonavicular ligament. [2] medioplantar oblique ligament. [2] inferior calcaneonavicular ligament. [2] These ligament components attach to different parts of the ...
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The calcaneonavicular ligament (ligamentum calcaneonaviculare) is attached to the lateral side of the navicular. (Note this is NOT the spring ligament which is commonly called the plantar calcaneonavicular ligament). It is commonly injured in "sprain-type" inversion injuries producing an avulsion fracture at the anterolateral process of the ...