随着生长，翼状韧带(附着于齿状突尖端和枕部的韧带)向上牵拉小骨形成其特征性的表现。
With growth, the alar ligaments that attach the tip of the dens to the occiput pull the ossicle upwards giving it its characteristic appearance.
胫骨柄翼状，防止旋转并减少切骨量。
Tibial stem has a wing shade which prevents rotation and reduces amount of bone-cut.
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