腰椎关节突关节和椎间盘内应力测量方法的研究

目的：探寻动态载荷下对腰椎关节突关节和椎间盘内应力进行直接测量的方法及其可行性，为进一步研究各种运动状态下关节内应力变化规律提供实验基础。方法：采用自行研制的微型压电晶体传感器，以长腰椎节段作为研究对象，对在六种工况下的讯号进行采集、转换和分析。分析和检验输出讯号和仪器的特性。结果：实验中我们得到是一种复杂的非周期性瞬态讯号。整个实验装置具有拾取动态讯号、灵敏度高、响应频率大、稳定性高和重复性好的特性。结论：本方法是一种新的可行的生物力学研究方法，更直接更实际地反映关节内的应力变化。

RESEARCH OF LUMBAR FACET JOINT AND DISC STRESS MEASURING METHOD

Purpose: To explore the method and probability for directly measuring the stress in lumbar facet joint and disc under dynamic loading, to afford the experimental base for further investigation of intra-articular stress changing regularity under different motion conditions. Methods: Using micro pressure-sensitive crystal sensor and long lumbar segment, to collect, transform and analysis the signal under six status. To analysis and test the features of signal and experimental instrument. Results: We get complex and non-periodic instant signal. The characteristic of whole instrument is only collecting dynamic signal. high sensitivity, large responsive frequency range. high stability and high repetition. Conclusion: This is a kind of new and practical biomechanical research method. It more directly and really express the intra-articular stress change.