Komeda T, Tanaka Y, Takakura Y, Fujii T, Samoto N, Tamai S
Department of Orthopaedic Surgery, Nara Medical University, 840 Shijo-cho, Kashihara, Nara 634-8521, Japan.
J Orthop Sci. 2001;6(2):110-8. doi: 10.1007/s007760100056.
The purposes of the present study were to establish a method for the evaluation of the longitudinal arch, using a two-dimensional coordinate system, and to clarify the main point of flattening of the foot in patients with hallux valgus. Measurements on a weight-bearing lateral radiograph of the foot were performed in 186 feet of 110 women with symptomatic hallux valgus and in 93 normal feet of 72 women. A two-dimensional coordinate system was used to perform the measurements. In this coordinate system, the line connecting the lowest point of the first metatarsal head and the lowest point (O) of the calcaneus is fixed as the x-axis, and the line that is perpendicular to the x-axis and intersects the x-axis at point O is fixed as the y-axis. The mean values of the y-coordinates at the points of the medial longitudinal arch of the foot in the patients with hallux valgus were significantly lower than those in the normal subjects (P < 0.001). The values were noticeably lower at points on the navicular. However, no change was observed in the posterior talus body. The new coordinate system indicated that the main points of flattening of the foot in patients with hallux valgus were the plantar flexion of the talus and the sinking of the navicular.
本研究的目的是建立一种使用二维坐标系评估足纵弓的方法，并阐明拇外翻患者足部扁平的要点。对110例有症状拇外翻女性的186只足以及72例女性的93只正常足进行了负重足部侧位X线片测量。使用二维坐标系进行测量。在该坐标系中，连接第一跖骨头最低点与跟骨最低点（O）的线固定为x轴，与x轴垂直且在点O处与x轴相交的线固定为y轴。拇外翻患者足部内侧纵弓各点的y坐标平均值显著低于正常受试者（P < 0.001）。舟骨上各点的值明显更低。然而，距骨后体未观察到变化。新的坐标系表明，拇外翻患者足部扁平的要点是距骨跖屈和舟骨下沉。
