骶髂关节面应力分布规律的CT测量

The bone density distribution of the sacroiliac joint measured by computer assisted tomography

目的了解骶髂关节面应力分布的规律。方法选取健康尸体5具，将标本以CT同样参数扫描各层面骶髂关节两侧骨及关节腔内固定的测量点，计算其CT值。结果骶髂关节的骨CT值及每个层面的CT值呈一类似于波谷样的分布规律。结论人体骨的密度与其所受到的应力直接相关，以此可推测骶髂关节面应力分布应该呈相似的分布特点。这一结论正与我们以三维有限元方法研究骶髂关节周围应力分布特点的结果极其相似。

Objective To find out the character of the its strain distribution.Methods We use five fresh cadaver sacroiliac joints of male adults .We fixed the samples in the CT.We chose the same point of the joints and measure the CT values .Result The bone CT values of the sacroiliac joints and the same slide distributes in a curve from the anterior of the joint to the posterior.Conclusion The density of the bones are directly related with the strains.So the strain distribution on the sacroiliac joint surface is similar to the CT value distribution.This is similar to the result we get with tri－dimentional finite elements study of the sacroiliac joint.