Grogan D P, Walling A K, Ogden J A
Shriner's Hospital for Crippled Children, Tampa, Florida.
J Pediatr Orthop. 1990 Sep-Oct;10(5):618-22. doi: 10.1097/01241398-199009000-00009.
Three anatomic specimens of os trigonum from skeletally immature patients demonstrated anatomic continuity of the cartilage containing the ossicle with the body of the talus, with a synchondrosis being present between the two ossifying regions. The os trigonum may be considered a developmental analogue of a secondary ossification center similar to the posterior calcaneal apophysis (although there are obvious histologic differences). The chondro-osseous border of the synchondrosis may be injured either as a chronic stress fracture or, less frequently, as an acute fracture, comparable to the injury patterns involving the accessory navicular.
来自骨骼未成熟患者的三块距骨三角骨解剖标本显示，包含小骨的软骨与距骨体存在解剖连续性，两个骨化区域之间存在软骨结合。距骨三角骨可被视为类似于跟骨后突的二级骨化中心的发育类似物（尽管存在明显的组织学差异）。软骨结合的软骨-骨边界可能因慢性应力性骨折而受损，或较少见地因急性骨折而受损，这与涉及副舟骨的损伤模式类似。
