A calcaneonavicular bar, when complete, seems to join the whole of the lateral aspect of the os naviculare to the calcaneus; it replaces the calcaneonavicular ligament, produces rigid fusion of the corresponding joint, and generally causes pain. Another anomaly, a talocalcaneal bridge, is commonly associated with it. In a series of two girls and five boys with feet made painful by these anomalies, there were four feet with complete and seven feet with incomplete bars. In the younger patients in whom the bar was incomplete, simple resection was successful and good motion returned to the subtalar joint. When the bar was complete, neither conservative measures nor simple resection relieved the pain, so that triple arthrodesis was necessary.
Kendrick JI. TREATMENT OF CALCANEONAVICULAR BAR. JAMA. 1960;172(12):1242-1244. doi:10.1001/jama.1960.03020120020004