青少年特发性脊柱侧弯矢状位平衡与足底压力的相关性

目的 探讨青少年特发性脊柱侧弯（adolescent idiopathic scoliosis, AIS）矢状位平衡与足底压力之间的相关性。方法 选取40名符合标准的AIS患者。对每位患者在X线片拍摄后进行足底压力测试。矢状位参数测量包括腰椎前凸（lumbar lordosis，LL）、胸椎后凸（thoracic kyphosis，TK）、骶骨倾斜角（sacral slope，SS）、骨盆入射角（pelvic incidence，PI）、骨盆倾斜角（pelvic tilt，PT）、脊柱骶骨角（spine sacral angle，SSA）和C7矢状位垂直距离（C7 sagittal vertical axis，C7 SVA）。足底压力参数测量包括双脚前后足的接触面积和压力占比。分析矢状位参数与足底压力参数之间的相关性。结果 矢状位参数之间，LL与SS、PI、PT、SSA均有相关性；PI与SS、PT、SSA均有相关性；SS与SSA强相关；C7 SVA与SSA有相关性。在主弯侧，LL与后足及整足的接触面积呈负相关，与后足及整足的压力占比呈正相关；TK与前足压力占比呈负相关；PT与前、后足及整足接触面积均呈正相关。其他矢状位参数如SS、PI、SSA及C7 SVA与足底压力无关。在主弯对侧，矢状位参数与足底压力均无相关性。结论 在AIS中，矢状位平衡参数与足底压力分布密切相关，尤其是矢状位参数LL、TK、PT与足底压力指标最相关。

Correlation Between Sagittal Balance and Plantar Pressure in Adolescent Idiopathic Scoliosis

Objective To explore the correlation between sagittal balance and plantar pressure in adolescent idiopathic scoliosis (AIS). Methods Forty patients meeting the criteria of AIS were selected. Plantar pressure test was conducted for each patient after they finished the X ray shooting. The sagittal parameters included lumbar lordosis (LL), thoracic kyphosis (TK), sacral slope (SS), pelvic incidence (PI), pelvic tilt (PT), spine sacral angle (SSA) and C7 sagittal vertical axis (C7 SVA). The plantar pressure parameters included contact area and pressure percentage of the forefoot and rearfoot. The correlation between sagittal parameters and plantar pressure parameters was analyzed. Results Among the sagittal parameters, LL was correlated with SS, PI, PT, SSA; PI was correlated with SS, PT, SSA; SS was strongly correlated with SSA; C7 SVA and SSA had a correlation. On the main curve side, LL was negatively correlated with contact area of the rearfoot and whole foot, and positively correlated with the pressure percentage of the rearfoot and whole foot; there was a negative correlation between TK and pressure percentage of the forefoot. PT was positively correlated with contact area of the forefoot, rearfoot and whole foot. Other sagittal parameters such as SS, PI, SSA and C7 SVA had no correlation with plantar pressures. On the opposite side of the main curve, there was no correlation between sagittal parameters and plantar pressures. Conclusions In the AIS, the sagittal balance is closely related to the plantar pressure distribution. In particular, the sagittal parameters LL, TK, and PT are most correlated to the plantar pressure parameters.