Deltoid os of the talus(.%), the accessorial scaphoid(.8%)and the osteal-bridge between the calcaneum and talus(7.0%)wer距骨三角骨 ( . % ) ,胫外骨 (或副舟骨 ) (.8% )和跟距骨桥 (7.0 % )见于 7～ 8岁。