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・ Calcaires lithographiques de Vachères
・ Calcaires marneaux inferieurs
・ Calcaires marneux inferieur
・ Calcaires marneux inferieurs
・ Calcaires marno
・ Calcaires noduleux cendres
・ Calcaires pseudo
・ Calcaires siliceux de Dole
・ Calcaires tâchetés
・ Calcaires à Baculites
・ Calcaires à chailles
・ Calcaires à Entroques
・ Calcaires à stipites
・ Calcalist
・ Calcancora
Calcaneal fracture
・ Calcaneal nerve branches
・ Calcaneal spur
・ Calcaneal tubercle
・ Calcaneo-cuboid articulation
・ Calcaneocuboid ligament
・ Calcaneofibular ligament
・ Calcaneus
・ Calcanhar Lighthouse
・ Calcar
・ Calcar avis
・ Calcaratus
・ Calcare di Altamura Formation
・ Calcare di Aurisina
・ Calcare di Cellina Formation


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Calcaneal fracture : ウィキペディア英語版
Calcaneal fracture

Calcaneal fracture, also known as lover's fracture and Don Juan fracture, is a fracture of the calcaneus. It is usually caused by a fall from height when one lands on their feet. These fractures represent approximately 2% of all fractures but 60% of tarsal bone fractures. The name ''lover's fracture'' is derived from the fact that a lover may jump from great heights while trying to escape from the lover's spouse.
==Anatomy and classification==
The calcaneus, also known as the heel bone, is the largest of the tarsal bones and articulates with the cuboid bone anteriorly and the talus bone superiorly. It is responsible for transmitting the majority of the body's weight from the talus bone to the ground.
Calcaneal fractures are categorized into two types: Intra- and Extrarticular fractures on the basis of subtalar joint involvement. Intrarticular fractures are more common and involve the posterior talar articular facet of the calcaneus. The Sanders classification groups these fractures into four types, based on the location of the fracture at the posterior articular surface. Extrarticular fractures are less common, and located anywhere outside the subtalar joint. Extrarticular fractures are categorized depending on whether the involvement of the calcaneus is anterior (Type A), Middle (Type B) or Posterior (Type C).
The Angle of Gissane, or "Critical Angle", is the angle formed by the downward and upward slopes of the calcaneal superior surface. On a lateral radiograph, an angle of Gissane of > 130° suggests fracture of the posterior subtalar joint surface.() Bohler's angle, or the "Tuber Angle", is another normal anatomic landmark seen in lateral radiographs. It is formed by the intersection of 1) a line from the highest point of the posterior articular facet to the highest point of the posterior tuberosity, and 2) a line from the former to the highest point on the anterior articular facet. An angle < 20° suggests a depression of posterior facet and possible calcaneal fracture.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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