Fig. 3

Classification of the Lisfranc ligament and the cuneiform 1-metatarsal 2&3 plantar ligament Type I-a: the Lisfranc ligament is a single fiber bundle, and the cuneiform 1-metatarsal 2&3 plantar ligament is a single fiber bundle. Type I-b: the Lisfranc ligament is a single fiber, and the cuneiform 1-metatarsal 2&3 plantar ligament consists of a superior fiber bundle and an inferior fiber bundle. Type II-a: the Lisfranc ligament consists of a superior fiber bundle and an inferior fiber bundle, and the cuneiform 1-metatarsal 2&3 plantar ligament is a single fiber bundle. Type II-b: the Lisfranc ligament and the cuneiform 1-metatarsal 2&3 plantar ligament consist of a superior fiber bundle and an inferior fiber bundle. Type III-a: the Lisfranc ligament consists of a superior fiber bundle, an intermediate fiber bundle, and an inferior fiber bundle, and the cuneiform 1-metatarsal 2&3 plantar ligament is a single fiber bundle. Type III-b: the Lisfranc ligament consists of a superior fiber bundle, intermediate fiber bundle, and an inferior fiber bundle, and the cuneiform 1-metatarsal 2&3 plantar ligament consists of a superior fiber bundle and an inferior fiber bundle. Type IV: the Lisfranc ligament and t the cuneiform 1-metatarsal 2&3 plantar ligament cannot be separated. 1: the Lisfranc ligament, 2: the superior fiber bundle of the Lisfranc ligament, 3: the intermediate fiber bundle of the Lisfranc ligament, 4: the inferior fiber bundle of the Lisfranc ligament, 5: the cuneiform 1-metatarsal 2&3 plantar ligament, 6: the superior fiber bundle of the plantar ligament, 7: the inferior fiber bundle of the cuneiform 1-metatarsal 2&3 plantar ligament, 8: the Lisfranc ligament and the cuneiform 1-metatarsal 2&3 plantar ligament cannot be separated, 9: the first cuneiform, 10: the first metatarsal, 11: the second metatarsal, L: lateral, M: medial