骶髂关节错位是临床常见病，可能影响女性的生育分娩及胎儿的生长发育等，给个人及家庭、社会造成沉重负担。前期研究发现整复手法改善骶髂关节错位临床疗效佳，但作用机制不明确。为阐明手法治疗该疾病作用机制，我们以人为研究对象分两部分研究：一、采用已经通过验证可行的基于磁共振图像的三维有限元技术，观察屈髋屈膝按压法对骶髂关节骨性稳定系统结构和软组织性稳定结构影响情况探讨其作用机制；二、以中医整体观念为指导，注重整个脊柱-骨盆-下肢的承重力线和应力平衡评价，应用世界范围内光学三维脊柱与姿态分析领域应用最广泛的系统--DIERS 3D/4D脊柱＆姿势分析系统和DIERS pedogait 步态跑台，动静态研究屈髋屈膝按压法对骶髂关节动力性稳定组织和静力性稳定组织影响探讨其作用机制。通过以上两部分研究探讨手法治疗骶髂关节错位作用机制。

Sacroiliac joint dislocation is a common clinical disease, which can affect women's childbirth and fetal growth and development, and cause a heavy burden on individuals, families and society. Previous studies have found that the reduction manipulation is effective in improving the sacroiliac joint dislocation, but the mechanism is not clear. To illustrate the technique treatment the disease mechanism, we take the research study is divided into two parts: a, use is verified feasible based on magnetic resonance image of three dimension finite element technology, observe the hip flexion knee pressure of sacroiliac joint osseous stabilization system structure and soft stable organizational structure affect the situation to explore its action mechanism; 2, guided by the overall concept of traditional Chinese medicine, pay attention to the whole spine and pelvic - lines of bearing force and the stress equilibrium evaluation of lower limb, application worldwide optical three-dimensional spine and posture analysis of the most widely used in the field of systems - the DIERS 3 d / 4 d & analysis system for posture and spine DIERS pedogait gait treadmill, dynamic and static studies of sacroiliac joint dynamic hip flexion knees pressing method influence the stability and static stability of tissue to explore its action mechanism. Through the above two parts of the study to explore the manipulation of the sacroiliac joint dislocation mechanism.