Abstract:

BACKGROUND: Now, three-dimensional studies related to the Ludloff osteotomy are little, and the conclusions are different. We still cannot fully understand the characteristic of osteotomy.
OBJECTIVE: To study the characters of three-dimensional mechanics of the Ludloff osteotomy in repair of hallux valgus.
METHODS: A wooden cylinder of 86.56 mm long and 30.65 mm diameter was selected for simulation test of the Ludloff osteotomy in repair of hallux valgus. Data were measured and recorded.
RESULTS AND CONCLUSION: As the extent of the correction increased, the length of the cylinder became shorter and shorter, and the distal end of the cylinder became pronated constantly. Ludloff osteotomy makes the first metatarsal head constant internal rotation so that it is benefit for improving the biomechanics of the metatarsophalangeal joints. A section of 15-20 degrees deviating to plantar should be suggested for patients with serious metatarsalgia. Ludloff osteotomy should be taken cautiously for those patients whose Ⅰ/ⅡIMA is more than 30 degrees.